[Server-devel] touchpad problems (was Re: Questions)

2009-05-09 Thread Bryan Berry
 From: david da...@leeming-consulting.com

 Daniel,
 
 Feedback from Nauru. It is very hot and very humid. I find typically that 
 almost all the children observe the jumping cursor. The recalibration does 
 help, but it's still a major issue. I am simply unable to use the touchpad in 
 demonstrations. I use a USB mouse and VNCLauncher with UltraVNC to project 
 the XO screen during trainings (works very well), but when I go round to help 
 trainees (we have been training parents as well as students and children) i 
 find I cannot use their touchpads - on almost all the XOs. They have better 
 luck (maybe my fingers are sweaty more than most) and I have noticed students 
 often wrapping cloth around their finger to use the touch pad. It remains a 
 real problem, but people do get by. When I move to an airconditioned room the 
 problem goes away mostly - a 4-finger salute and it's fine.
 

We had the same problems w/ the touchpad here in Nepal. Nothing ever
fixed the problem, though we never tried wrapping our fingers in cloth.
That is quite novel.

The new touchpad is 1 million times better. Our kids almost never have
trouble w/ the new touchpad. That said, kids w/ the old touchpad are out
of luck.

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Re: [Server-devel] phantom USB-Ethernet problem

2009-04-04 Thread Bryan Berry
On Sat, 2009-04-04 at 11:16 +0200, Martin Langhoff wrote:
 On Sat, Apr 4, 2009 at 9:04 AM, Bryan Berry br...@olenepal.org wrote:
  Please disregard my frantic e-mails about the USB-Ethernet problem. It
  turns out that the USB-Ethernet NIC was not at fault, even when using a
  USB 1.1. USB-Ethernet. However, I would not recommend using it on the
  LAN side, since it has much lower throughput than a USB 2.0
 
 Interested to hear what you find to be a workable solution as
 secondary nic for something like an mswind.

will let you know. These mini-desktop PC's are in IMHO the best option
for the XS in terms of performance to cost ratio, power consumption, and
extensibility. There are other super-low power PC's, but they tend to be
3x more expensive and you usually can't easily add a bigger Hard drive
or more RAM later according to needs. 



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Re: [Server-devel] Is a USB-Ethernet NIC appropriate for the XS?

2009-03-24 Thread Bryan Berry
That isn't the problem. I believe that USB 1.1 NIC's choke when they
have multiple connections. I guess the Rx polling - whatever that is -
causes so many interrupts that the NIC stops serving requests

friends on server-devel, I highly recommend you use the lsusb -v to
find out if your usb NIC is actually USB 2.0. Apparently a number of USB
NIC's on the market are advertised as USB 2.0 but are actually 1.1
  
On Tue, 2009-03-24 at 14:08 +0545, Ties Stuij wrote:
 So Tony suggested just using the usb-ethernet thingies for the
 internet-connection. USB1.1 is, what, 700kbps? What are the chances
 that we can supply the schools with more bandwidth than that?
 
 /Ties
 
 On Tue, Mar 24, 2009 at 9:56 AM, Martin Langhoff
 martin.langh...@gmail.com wrote:
  On Tue, Mar 24, 2009 at 4:49 AM, Bryan Berry br...@olenepal.org wrote:
  The ever helpful cjb and Mitch_Bradley directed me to the root of the
  problem, the USB-ethernet devices I am using are USB 1.1 which has
  horrible throughput. A USB-ethernet device that supports USB 2.0 should
  fix the problem.
 
  That's great news!  I'll also be delighted to hear about what hw you
  find that works...
 
  cheers,
 
 
  m
  --
   martin.langh...@gmail.com
   mar...@laptop.org -- School Server Architect
   - ask interesting questions
   - don't get distracted with shiny stuff  - working code first
   - http://wiki.laptop.org/go/User:Martinlanghoff
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Re: [Server-devel] Is a USB-Ethernet NIC appropriate for the XS?

2009-03-23 Thread Bryan Berry
The ever helpful cjb and Mitch_Bradley directed me to the root of the
problem, the USB-ethernet devices I am using are USB 1.1 which has
horrible throughput. A USB-ethernet device that supports USB 2.0 should
fix the problem.

BryanWB Mitch_Bradley: great, do u think I can buy a usb2 ethernet nic
for under $50? budget is tight and I need these for 15 XS's
Mitch_Bradley AX8817X and AX88772 are the chips
BryanWB Mitch_Bradley: thanks
Mitch_Bradley
http://www.tigerdirect.com/applications/category/category_slc.asp?CatId=589
BryanWB Mitch_Bradley: is there any reason that USB-Ethernet is
inherently unworkable or is it just a question of getting the right
usb-ethernet nic?
Mitch_Bradley USB 1.1 sucks rocks for ethernet because the polling for
rx packets kills the throughput
cjb BryanWB: no, the others are usb2
cjb what Mitch_Bradley said
BryanWB Mitch_Bradley: so usb1.1 will totally crap out w/ 20 users ?
Mitch_Bradley USB2.0 has much improved bandwidth and much lower
latency for polling
 usb1.1 will totally crap out with 1 user
BryanWB Mitch_Bradley: thanks a lot guys, you are saving my bacon
cjb BryanWB: the number of users won't affect it, other than by
sucking proportional to load
Mitch_Bradley I didn't even bother supporting USB 1.1 ethernet chips
in OFW.  It's just not worth it.
cjb anyway, yeah.  just find an asix dongle.
Mitch_Bradley try to buy a name brand device.  The no-name ones often
just don't work.

On Mon, 2009-03-23 at 15:43 +0100, Martin Langhoff wrote:
 On Mon, Mar 23, 2009 at 3:10 PM, Bryan Berry br...@olenepal.org wrote:
  We want to use the MSI Wind PC for the XS but it has one big problem. It
  only has 1 on-board NIC and no PCI slots. As you know, the XS requires 2
  NIC's. We have tried several different USB NIC's and are having serious
  throughput problems. Is this issue one w/ the NIC or the fact that it is
  connected by USB?
 
 My main worry with USB-connected NICs would be reliability. If the NIC
 is reliable, but the throughput a bit below-par, you can still
 probably use it as the WAN NIC -- the throughput is likely to be
 constrained upstream anyway.
 
  - When you say throughput problems... what are you getting? How bad
 is it? Even if limited, would it be appropriate for the WAN port?
 
  - The problem may be specific to the driver or NIC hardware -- is
 there any discussion on the kernel dev list about it?
 
  - The problem may be with the USB bus on the MS Wind, hardware or
 drivers. Perhaps testing for bus throughput or interrupt handling
 helps?
 
  - Have you tested the reliability of the devices? This may be a larger 
 problem.
 
 cheers,
 
 
 martin
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[Server-devel] notes on scaling ejabberd for the XO's

2009-03-10 Thread Bryan Berry
Here are some notes from a short IRC conversation I had w/ Rob Mcqueen,
the lead developer of Telepathy

transcript of conversation on #sugar
bemasc: bernie: I am concerned about the fact that in the default
schoolserver set up all users are in one giant shared roster
Robot101 RESOLVED, ALREADYFIXED (but not in any deployments, or in the
UI)
BryanWB and the resulting chatter slows down the XO/Sugar
considerably?
Robot101 yes
 Robot101 rwh
 the latest versions of sugar and telepathy support using an XMPP
component called gadget
 instead of the shared roster
BryanWB Robot101: so gadget fixes this?
Robot101 yup
 Robot101 rwh
 you only receive push notifications about a) what Sugar has searched
for/displaying on the neighborhood view, or b) your friends
-- hgcphoenix (n=hc...@124.107.253.193) has joined #sugar
BryanWB Robot101: neat, and does it work together w/ the XS? 
 Robot101: which version of sugar is it in?
-- hgcphoenix (n=hc...@124.107.253.193) has left #sugar
Robot101 they went off on a complete tangent trying to hack shared
rosters to have less mutually visible sets of people
 we thought of that but also decided it was the bong, so we fixed it
properly with gadget.
BryanWB Robot101: what is the testing status of gadget?
Robot101 it's deployed on jabber.sugarlabs.org (which is on
collabora.co.uk)
 seems to work fine, ejabberd seems to gradually leak memory though,
which isn't too great
 maybe a little much CPU usage on gadget, but nothing you couldn't
profile
 and I'm not familiar enough with the sugar release cycle to say where
the support went in
 Robot101 rwh
 eu daytime is better to find the Sugar devs and the Collaborans who
worked on Gadget
 (cassidy, daf)
BryanWB Robot101: ok, will talk w/ them later today
Robot101 gadget was always our plan, it just took us a while to get to
it
BryanWB Robot101: by the way last year we tested ejabberd by streaming
your video talk on Telepathy to 80 XO's
bemasc Robot101: I believe martin dropped the shared roster, and
inside is simply using moodle to set all rosters directly.
 s/inside/instead/
 bemasc bernie benzea
Robot101 bemasc: so it's still shared as in server-enforced mutual
visibility, just in smaller groups.
bemasc right, but from ejabberd's perspective, it's individual rosters
Robot101 that's exactly how shared rosters always work
Robot101 the client thread gets a copy of the same roster at sign in
bemasc oh? I thought there was a patch to ejabberd required.
Robot101 yes, he's patched it to source the shared roster from moodle,
I'd imagine
bemasc martin seemed to say that he could use a totally stock ejabberd
Robot101 oh, right. sql query or something. our patches were just
extending the built-in shared roster to a) work properly (deal with
dynamic additions and removals) and b) support a group of online users
rather than everyone


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Re: [Server-devel] Serving 400+ students w/ a single central XS - ejabberd nightmare?

2009-03-09 Thread Bryan Berry
On Tue, 2009-03-10 at 09:58 +1300, Martin Langhoff wrote:
 On Mon, Mar 9, 2009 at 12:11 AM, Bryan Berry br...@olenepal.org wrote:
  I am worried about the XO's and not the XS.
 
 Now you're starting to see what I've seen :-/ I also worry about your
 APs and networking infra -- to support 400 active users you'll want at
 least 8 APs. In more realistic terms, you'll probably need 12,
 assuming a reasonably balanced load.

We will have roughly 8+ AP's. We have found that off-the-shelf AP's can
handle around 60-70 users.  But that doesn't still doesn't solve the
problem of the XO's getting bogged down by tons of ejabberd chatter.

DSD: do you have any ideas about this?

We are looking at about 100-150 students per school and connecting 3-4
schools to a central XS. 

 As I mentioned before... I am working on xs-0.6, with the
 moodle-ejabberd magic.

That's great, but our pilot starts in a month but that doesn't fit our
timeline. I don't want to send out a completely new, untested XS into
rural parts of Nepal.

Do you have any other suggestions fo us?

  This dell server has a dual-core Xeon 3.0 GHz processor and 2 GB RAM.
  RAM was fine, beam only used 450 MB according to ps_mem.py
 
 Well, that's 1/4 of your RAM. You need to budget for apache/php,
 postgres, and squid. Right now the main problem is Squid.

That was 450 MB during account creation. It dropped significantly
thereafter. I didn't provide much server stats last time because the XS
resource usage isn't a critical problem.

 Thanks for the list below. Quite a few are about stuff I can't help
 with (roof leaks, power cords...) the others, I'm working on...

That's the whole point of why I am telling you about such problems and
how they make a centralized XS easier for us to maintain.


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Re: [Server-devel] Serving 400+ students w/ a single central XS - ejabberd nightmare?

2009-03-09 Thread Bryan Berry
On Mon, 2009-03-09 at 22:36 -0400, Daniel Drake wrote:
 2009/3/9 Bryan Berry br...@olenepal.org:
  We will have roughly 8+ AP's. We have found that off-the-shelf AP's can
  handle around 60-70 users.  But that doesn't still doesn't solve the
  problem of the XO's getting bogged down by tons of ejabberd chatter.
 
  DSD: do you have any ideas about this?
 
 Have only had a chance to test numbers on Linksys WRT54Gsomething
 routers, which stop accepting new connections after 33 users. yay.

The linksys is WRT54G total crap. We don't use them. We have found that
cheaper AP's do much better. We have good luck w/ random Taiwanese
brands like Compex, Lantech, and AZTech. They have Atheros or RealTek
chipsets

 I haven't seen XO's bogged down by ejabberd chatter. Ran 75 today
 while monitoring the TX/RX stats on the LAN interface on the XS and
 was impressed at how low it was.
 
 Yes, the XOs run slow when you view a busy neighborhood view, but it's
 fine as soon as you switch away. There was a bug where sugar updates
 every icon on the neighborhood view 10 times every second when you are
 on that screen (but only when you are on that screen), it's fixed for
 0.84.

I saw it drop as well when I changed out of the Network View, but it
still remained fairly high w/ 200 very active users, too high to keep me
from launching EToys

  That's great, but our pilot starts in a month but that doesn't fit our
  timeline. I don't want to send out a completely new, untested XS into
  rural parts of Nepal.
 
 I tried and didn't get any feedback from XS usage in large
 deployments, so we pretty much figured we'd send it into not-as-rural
 paraguay and find out what happens (we don't really have any other
 options!).
 
 Daniel

I think that is because large deployments like Uruguay aren't using the
XS and others like Mongolia don't have the technical expertise to
monitor such things.

That leaves new large deployments like Paraguay and Nepal in an
unenviable position as pioneers.

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Re: [Server-devel] Serving 400+ students w/ a single central XS - ejabberd nightmare?

2009-03-08 Thread Bryan Berry
On Sun, 2009-03-08 at 22:36 +1300, Martin Langhoff wrote:
 On Sun, Mar 8, 2009 at 7:52 PM, Bryan Berry br...@olenepal.org wrote:
  But 200-300 users could be online at once. I think it will be too
  complicated to tell some of them: Don't connect to the AP right now,
  you may overwhelm ejabberd
 
 Give ejabberd enough RAM and it won't be a problem. The rest of your
 infrastructure will, however.

I am worried about the XO's and not the XS.

I used the hyperactivity program and got some unscientific results. I
simulated 200 users using the schoolserver constantly. The CPU of the XS
was very busy, staying near 100% usage during the account creation
period and then it leveled off. I didn't monitor it very closely after
that b/c ejabberd is not my chief concern

This dell server has a dual-core Xeon 3.0 GHz processor and 2 GB RAM.
RAM was fine, beam only used 450 MB according to ps_mem.py

sudo ./hyperactivity.py gabble schoolserver.schoolnet.gov.np 200

I ran hyperactivity from my regular dell laptop

My XO showed 200 users in the Network View and became very sluggish. Top
showed that 30-40% of CPU was taken up w/ handling the sugar-shell, the
program which manages the Network View. The dbusdaemon was using roughly
15-20% of the CPU. I tried to launch one our E-Paath flash activities
and it hung displaying the error message Unresponsive script. I tried
to launch EToys and it failed as well.


  The XS is quite a complicated ensemble of software having an XS at every
  school magnifies the administration work.
 
 What admin work do you foresee on the XS?

  * Making sure that ejabberd keeps running
  * Making sure that the school doesn't have roof leak directly
above the XS
  * Making sure the schools doesn't remove the power cord and use it
for something else
  * Make sure the school doesn't repurpose the UPS for the XS for
charging cell phones
  * make sure the XS doesn't get zapped by a sudden power surge
  * Making sure it is there 3 months later
  * Make sure that dansguardian, squid, dhcp stay up week after week

We don't have any problem gettting the kids to take care of the XO's but
we have a Hell of a time making sure they take care of the XS

  Additionally our schools only have about 8 hours of electricity per day.
  I am concerned about the XS losing power suddenly multiple times per
  day.
 
 Good point. I've been building everything with daily poweroffs in
 mind and every component should handle it. But haven't field-tested...

Sadly, no one has and this is one of my chief concerns

  we can provide that (RAM)
 
 Have you go the 4GB barrier in mind? Past 4GB we get into all sorts of
 problems. You'll need a 64-bit machine, and you'll have to convince me
 or someone else to build a 64-bit XS iso rather than the vanilla
 32-bit we're using now.
 
  We have a relatively low latency connection b/w the schools and the XS.
 
 Low latency, high bandwidth and everyone in the same netblock? No
 routers in the middle. That's what the XS assumes, in any case.
 
  the conclusion that Nepal has different requirements than some of the
  other pilot schools.
 
 Everybody is a little bit special. By deviating from how the XS is
 designed to be deployed, you will add mgmt work to workaround whatever
 gotchas.




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[Server-devel] XO's get bogged down w/ chatter (was Re: Serving 400+ students w/ a single central XS )

2009-03-08 Thread Bryan Berry
I just want to reiterate the following because I have gotten several
e-mails suggesting solutions to scaling the XS. 

The Dell server handles this problem fine. I expect the MSI wind PC will
handle it fine as well.

The problem is w/ the ___XO's___ NOT the servers. It is hard for the
XO's to keep track of all the conversations happening

The problem w/ centralization is creating a huge giant shared chatroom.
It creates a ton of chatter that the XO's have to keep track of.

I need to find the upper limit of how many XO's can share one roster
w/out getting significantly bogged down.

On Sun, 2009-03-08 at 16:57 +0545, Bryan Berry wrote:
 On Sun, 2009-03-08 at 22:36 +1300, Martin Langhoff wrote:
  On Sun, Mar 8, 2009 at 7:52 PM, Bryan Berry br...@olenepal.org wrote:
   But 200-300 users could be online at once. I think it will be too
   complicated to tell some of them: Don't connect to the AP right now,
   you may overwhelm ejabberd
  
  Give ejabberd enough RAM and it won't be a problem. The rest of your
  infrastructure will, however.
 
 I am worried about the XO's and not the XS.
 
 I used the hyperactivity program and got some unscientific results. I
 simulated 200 users using the schoolserver constantly. The CPU of the XS
 was very busy, staying near 100% usage during the account creation
 period and then it leveled off. I didn't monitor it very closely after
 that b/c ejabberd is not my chief concern
 
 This dell server has a dual-core Xeon 3.0 GHz processor and 2 GB RAM.
 RAM was fine, beam only used 450 MB according to ps_mem.py
 
 sudo ./hyperactivity.py gabble schoolserver.schoolnet.gov.np 200
 
 I ran hyperactivity from my regular dell laptop
 
 My XO showed 200 users in the Network View and became very sluggish. Top
 showed that 30-40% of CPU was taken up w/ handling the sugar-shell, the
 program which manages the Network View. The dbusdaemon was using roughly
 15-20% of the CPU. I tried to launch one our E-Paath flash activities
 and it hung displaying the error message Unresponsive script. I tried
 to launch EToys and it failed as well.
 
 
   The XS is quite a complicated ensemble of software having an XS at every
   school magnifies the administration work.
  
  What admin work do you foresee on the XS?
 
   * Making sure that ejabberd keeps running
   * Making sure that the school doesn't have roof leak directly
 above the XS
   * Making sure the schools doesn't remove the power cord and use it
 for something else
   * Make sure the school doesn't repurpose the UPS for the XS for
 charging cell phones
   * make sure the XS doesn't get zapped by a sudden power surge
   * Making sure it is there 3 months later
   * Make sure that dansguardian, squid, dhcp stay up week after week
 
 We don't have any problem gettting the kids to take care of the XO's but
 we have a Hell of a time making sure they take care of the XS
 
   Additionally our schools only have about 8 hours of electricity per day.
   I am concerned about the XS losing power suddenly multiple times per
   day.
  
  Good point. I've been building everything with daily poweroffs in
  mind and every component should handle it. But haven't field-tested...
 
 Sadly, no one has and this is one of my chief concerns
 
   we can provide that (RAM)
  
  Have you go the 4GB barrier in mind? Past 4GB we get into all sorts of
  problems. You'll need a 64-bit machine, and you'll have to convince me
  or someone else to build a 64-bit XS iso rather than the vanilla
  32-bit we're using now.
  
   We have a relatively low latency connection b/w the schools and the XS.
  
  Low latency, high bandwidth and everyone in the same netblock? No
  routers in the middle. That's what the XS assumes, in any case.
  
   the conclusion that Nepal has different requirements than some of the
   other pilot schools.
  
  Everybody is a little bit special. By deviating from how the XS is
  designed to be deployed, you will add mgmt work to workaround whatever
  gotchas.
 
 
 
 
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[Server-devel] small form factor XS options?

2008-11-26 Thread Bryan Berry
I am shopping for some XS options to test out ahead of our spring
deployment.

I have looked at the MSI Wind PC, Eee Box, and the Shuttle X2700N. All
have nice small form factors, low prices, and Atom chips.

I am focused on Intel Atom-based PC's because they seem to be dropping
in price the fastest and there are a number of different vendors selling
atom-based pc's. Also, they are low-power.

MSI Wind PC - cheap at roughly $350 w/ 1.6 Ghz processor and 1 GB RAM
CON: looks like it has poor cooling and some customers complain it gets
quite hot.

Eee Box - more expensive but doesn't seem to have the same cooling
problem

Shuttle X2700N - slightly more expensive than the MSI at $200 but looks
to have much better cooling. I can't find any customer reviews on it.

Unfortunately, none of these have a spare PCI slot that I can use for
the XS's 2nd NIC card. We are considering using a USB NIC for the eth1.

Does anyone know of similar small form factor PC's that do have an extra
PCI slot? Or other good XS choices?




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Re: [Server-devel] small form factor XS options?

2008-11-26 Thread Bryan Berry
On Wed, 2008-11-26 at 09:39 -0200,
 If you look for machines with VIA CPUs, they are low power
 dissipation, and often cheap too. We have a few samples at 1cc with
 heatsinks - no fans!

Will do, tks for the heads up

I definitely need at least 1 Ghz processor because we intend to host an
offline E-Library on the XS. Even w/out the E-Library we want to host a
lot of content cached from the broader Internet and that will require a
good bit of RAM and some CPU.

I have looked at the Excito and they are impressive but do not offer a
fast enough processor and the price is higher than I would like. 

  Eee Box - more expensive but doesn't seem to have the same cooling
  problem
 
 I talked with Asus engineers who assured there's a version of it with
 no fans, and a heatsink. Not sure if it's in the catalog though :-/
 
  Unfortunately, none of these have a spare PCI slot that I can use for
  the XS's 2nd NIC card. We are considering using a USB NIC for the eth1.
 
 That'll hurt if you have significant traffic. In fact, I'd recommend
 using the usb nic for eth0 which is guaranteed to have less traffic
 ;-)
 
  Does anyone know of similar small form factor PC's that do have an extra
  PCI slot? Or other good XS choices?

This is very true. Small form factor isn't actually that important.
Low-Power is much more important. I have to say I am still leaning
towards the Shuttle X2700N. It seems to have adequate cooling features
compared to other small form-factor PCs

Perhaps my best option would be to purchase an Atom CPU, appropriate
motherboard, and fit into a regular PC chassis . . . But I still haven't
checked out the Via CPU options ;)


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Re: [Server-devel] OLPC XS 0.5 Released

2008-11-26 Thread Bryan Berry
Martin, can u provide and .md5 for this and future releases? thanks


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Re: [Server-devel] Concerns about ejabberd + 767

2008-11-17 Thread Bryan Berry
On Mon, 2008-11-17 at 00:36 -0500, Martin Langhoff wrote:
 On Mon, Nov 17, 2008 at 12:19 AM, Bryan Berry [EMAIL PROTECTED] wrote:
  I would like to know if anyone here has seriously tested build 767
  together with XS 0.4? Specifically the ejabberd and ID manager.
 
 Yes. The OLPC QA team has done lots of testing of 8.2, all against
 XS-0.4. Following the install instructions to the letter, they've got
 things going in predictable ways. It's not a perfect score -- past
 certain numbers, presence service and sharing get into a bit of
 trouble, but it's stable and predictable.

Martin, I am not finding Joe's mails in the devel or server-devel lists.
I have found some e-mails such as this one on testing mailing list
http://lists.laptop.org/pipermail/testing/2008-October/000526.html 
http://lists.laptop.org/pipermail/testing/2008-October/000536.html
and this wiki page http://wiki.laptop.org/go/Tests but I can't find
anything with more specific information. I will keep looking.

I see in this e-mail that 58 laptops were running chat  Browse and
connected to the XS.
http://lists.laptop.org/pipermail/testing/2008-October/000536.html

Joe, are there more detailed resources that I can look at regarding your
testing of XS 0.4 and 8.2.0 (767)?

thanks

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Re: [Server-devel] Concerns about ejabberd + 767

2008-11-17 Thread Bryan Berry
On Mon, 2008-11-17 at 00:36 -0500, Martin Langhoff wrote:
 On Mon, Nov 17, 2008 at 12:19 AM, Bryan Berry [EMAIL PROTECTED] wrote:
  I would like to know if anyone here has seriously tested build 767
  together with XS 0.4? Specifically the ejabberd and ID manager.
 
 Yes. The OLPC QA team has done lots of testing of 8.2, all against
 XS-0.4. Following the install instructions to the letter, they've got
 things going in predictable ways. It's not a perfect score -- past
 certain numbers, presence service and sharing get into a bit of
 trouble, but it's stable and predictable.
 Search for emails from [EMAIL PROTECTED] on the devel list talking about
 collaboration for the numbers (which I can't remember now).

thanks Martin! I will definitely do that.

 Other than that, the main issue with ejabberd is memory usage -- with
 large numbers of users, it'd bound to consume lots of RAM. We're
 working on that towards xs-0.6.
 
  We are deploying to a new school later this week and the only loose ends
  right now is the idmgr and ejabberd. Prithak Sharma and Tony Anderson
  are working very hard on getting the XS ready for this week's
  deployment.
 
 I'd suggest considering xs-0.5 -- it has quite a few improvements, and
 more importantly, it'll be much easier to upgrade to 0.6 by skipping
 the larger and at points complex upgrade path from 0.4 to 0.5.
 
 Also - if you can get us enough info to diagnose specific issues with
 ejabberd... I'm all ears!

will do

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[Server-devel] XS - XO archiving and backup (was Re: [OLPC India] Issues on the ground )

2008-11-09 Thread Bryan Berry
On Mon, 2008-11-10 at 11:44 +0530, JV Avadhanulu wrote:
 Dear Bryan,
 I have a question.
 Are children able to transfer files to the XS Server over Wi-Fi in your 
 deployments?

Our deployments are still using XS-163, which does not have the
xs-backup method. We hope to migrate to a newer version of the XS later
this month.

To my knowledge, the XO's can back up to the XS but there still is no
way for children to browse their backups or restore from them. My
knowledge may be out of date though. Martin Langhoff knows much better
than I.

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Re: [Server-devel] Server-devel Digest, Vol 18, Issue 6

2008-10-05 Thread Bryan Berry

Martin Langhoff wrote:
 Been ruminating on this a bit. The more I think about it, the more
 clear it is that DG on the XS is not a good long term solution.

DG may not be a good long term solution, but the pilots need it asap and
it still isn't part of the default install. Greg is right that the XS is
already a production project but it lacks one of the key features that
all the pilots need -- basic content filtering. The deployments that
need it most are those w/ the least technical skills and least likely to
complain on this mailing list.

 So it's a task better pushed to a proxy/filter upstream at the ISP
 network -- for any large deployment, we should start advising the
 local team to arrange with the ISP(s?) involved the co-location of 1
 server. This server gives us an opportunity to perform
 
  - filtering at one central place
= better scale up / scale out economies (making bayesian costs more
 reasonable)
= larger scoring pool, so good/bad content gets flagged faster
 and for everyone

I am not a fan of a centralized solution. 

1) It sounds a way off and we need a working solution asap.
2) In Nepal we will work w/ a variety of regional ISP's to provide
bandwidth to schools. I expect many, many other countries will do the
same. I will trust the regional ISP's to provide bandwidth, but not
content filtering as well.

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Re: [Server-devel] Nepal XS

2008-10-05 Thread Bryan Berry
On Mon, 2008-10-06 at 09:18 +0545, Martin Langhoff Wrote wrote:
For example, use two XOs to verify ejabberd
functionality. Use browse to verify that the schoolserver link delivers
the Moodle (site) home page. Use browse to verify internet 
 connectivity.
Try to access a 'forbidden' site to verify Dansguardian is working. In
short, a checklist of simple tests to verify server functions.
 
 Worthtwhile idea, right now we have too many things changing, but
 that'd be something for a 0.9/1.0 release.

I respectfully disagree, I think these tests would be more useful since
many things are changing. Simple tests would save us a lot of testing
time in our own lab. The tests should just be generic enough to
accommodate changes in the underlying systems.

Such tests would save Tony a ton of time testing a new XS install,
whether it be 0.4, 0.5-0.9 I suspect they would save time for others as well.

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Re: [Server-devel] What's cooking in the XS pot this week (2008-10--01)

2008-10-03 Thread Bryan Berry
On Fri, 2008-10-03 at 18:57 +1300, Martin Langhoff wrote:
 On Fri, Oct 3, 2008 at 6:52 PM, Bryan Berry [EMAIL PROTECTED] wrote:
  Dans can use a good bit of memory but I haven't really calculated how
  much. Top shows me a lot dansguardian processes, each using about 10K of
  RES memory, 980 of SHR, and 0.5% of Mem. What I understand about top and
  memory is that it doesn't really tell much at all b/c the processes are
  using shared memory.
 
 yeah - top is not that useful. can you try ps_mem.py?
 http://www.pixelbeat.org/scripts/ps_mem.py

great tool! DG is using 30.4 MB under a very light load. I will have to
check later when school is back in session but that isn't for another 2
weeks. Is is holiday season ;)

 Am I right in thinking that DG is actually a custom apache or an
 apache with a custom config + a DG module?
 

Umm, don't know


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Re: [Server-devel] What's cooking in the XS pot this week (2008-10--01)

2008-10-02 Thread Bryan Berry
Greg, 

We will be setting up two labs here in Nepal, one in the next couple
weeks and likely one in the first week of November at Nepal's Dept of
Education. Depending on our experiences in those labs, we want to roll
out a new version of the XS in November to our two pilot schools and
possibly a new pilot school.

This mirrors our priorities 
 A stable and scalable eJabber is critical as are basic XS features like:
 - Caching
 - Filtering (is DanGuardian built in and shipped with the XS ?)
 - NAT

w/ two exceptions. We still find it a bear to install the XS from
scratch. That could be our fault but it needs to be easier to set up
ejabberd properly. It also needs to be easier to get dansguardian up and
running. As far as I can tell dansguardian is not pre-installed on the
XS in XS 0.4.  

Our volunteer Tony Anderson has been working on this and has a better
understanding of the problems we are having.

I strongly agree that, while Moodle is important, a lot of work needs to
be done on ejabberd and dansguardian.

 Message: 1
 Date: Wed, 01 Oct 2008 12:42:19 -0400
 From: Greg Smith [EMAIL PROTECTED]
 Subject: Re: [Server-devel] What's cooking in the XS pot this week
   (2008-10--01)
 To: Martin Langhoff [EMAIL PROTECTED]
 Cc: XS Devel server-devel@lists.laptop.org
 Message-ID: [EMAIL PROTECTED]
 Content-Type: text/plain; charset=ISO-8859-1; format=flowed
 
 Hi Martin,
 
 Thanks for the update!
 
 Its great to see all the items planned for or in 0.5:
 http://dev.laptop.org/query?status=assignedstatus=closedstatus=newstatus=reopenedorder=prioritycol=idcol=summarycol=statuscol=typecol=prioritycol=componentmilestone=xs-0.5
 
 
 On your question of who is waiting for XS 0.5, I know of at least two 
 deployments that are building labs and testing configurations with XS 
 software:
 
 Paraguay
 Birmingham
 
 Both will need a stable XS that they can use ASAP. Whether they will go 
 with XS 0.5 or not depends on what 0.5 includes, when 0.6 will be 
 available and what it includes.
 
 AFAIK Moodle is not a must have item for either deployment.
 
 A stable and scalable eJabber is critical as are basic XS features like:
 - Caching
 - Filtering (is DanGuardian built in and shipped with the XS ?)
 - NAT
 
 Birmingham may start using XOs and an XS in schools in mid-Novemeber. 
 Paraguay will probably start later but we should lock down their version 
 ASAP as they want lead time to really flush out all issue in the lab.
 
 They may both use the backup and restore feature if they have enough 
 disk on the server (of course they will use it whether they like it or 
 not as you can't turn it off :-).
 
 I think there other deployments that will want to use a school server 
 before the end of 2008. Two other features which may tip the balance for 
 deployments are upgrade of XO images and activities via school server 
 cache (Peru).
 
 Spending a little more time to make sure that XS 0.5 is very stable and 
 well documented is a good idea. However, we should start to be more 
 precise about the features and dates for each release we plan to deliver 
 before the end of CY 08.
 
 Thanks,
 
 Greg S
 


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Re: [Server-devel] What's cooking in the XS pot this week (2008-10--01)

2008-10-02 Thread Bryan Berry
Wad, you're right that Dansguardian is a can of worms but it is a very
important can of worms that needs to work w/ minimal configuration, at
least initially.

I would say that the initial install should set a medium level of
restriction and then leave it to the local deployment teams to tweak it
to cultural norms.

On Fri, 2008-10-03 at 00:17 -0400, John Watlington wrote:
 On Oct 2, 2008, at 11:51 PM, Bryan Berry wrote:
 
  Greg,
 
  We will be setting up two labs here in Nepal, one in the next couple
  weeks and likely one in the first week of November at Nepal's Dept of
  Education. Depending on our experiences in those labs, we want to roll
  out a new version of the XS in November to our two pilot schools and
  possibly a new pilot school.
 
  This mirrors our priorities
  A stable and scalable eJabber is critical as are basic XS features  
  like:
  - Caching
  - Filtering (is DanGuardian built in and shipped with the XS ?)
  - NAT
 
  w/ two exceptions. We still find it a bear to install the XS from
  scratch. That could be our fault but it needs to be easier to set up
  ejabberd properly. It also needs to be easier to get dansguardian  
  up and
  running. As far as I can tell dansguardian is not pre-installed on the
  XS in XS 0.4.
 
 What default permissions should be provided for DansGuardian ?
 What list of banned sites and keywords ?
 
 No real disagreement.  But one of the issues with DansGuardian is  
 that the
 configuration reflects local mores, and it is difficult to provide a  
 default.
 How do we ensure that a deployment provides the configuration files ?
 
 Cheers,
 wad
 

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Re: [Server-devel] What's cooking in the XS pot this week (2008-10--01)

2008-10-02 Thread Bryan Berry
I don't have time currently to work on this but I will ask Tony and our
interns Avash and Aakash to work on this.

On Fri, 2008-10-03 at 00:37 -0400, John Watlington wrote:
 Perhaps you want to suggest a specific set of configuration files
 that provides what you consider a medium level of restriction,  
 including
 blacklists ?
 
 wad
 
 On Oct 3, 2008, at 12:31 AM, Bryan Berry wrote:
 
  Wad, you're right that Dansguardian is a can of worms but it is a very
  important can of worms that needs to work w/ minimal configuration, at
  least initially.
 
  I would say that the initial install should set a medium level of
  restriction and then leave it to the local deployment teams to  
  tweak it
  to cultural norms.
 
  On Fri, 2008-10-03 at 00:17 -0400, John Watlington wrote:
  On Oct 2, 2008, at 11:51 PM, Bryan Berry wrote:
 
  Greg,
 
  We will be setting up two labs here in Nepal, one in the next couple
  weeks and likely one in the first week of November at Nepal's  
  Dept of
  Education. Depending on our experiences in those labs, we want to  
  roll
  out a new version of the XS in November to our two pilot schools and
  possibly a new pilot school.
 
  This mirrors our priorities
  A stable and scalable eJabber is critical as are basic XS features
  like:
  - Caching
  - Filtering (is DanGuardian built in and shipped with the XS ?)
  - NAT
 
  w/ two exceptions. We still find it a bear to install the XS from
  scratch. That could be our fault but it needs to be easier to set up
  ejabberd properly. It also needs to be easier to get dansguardian
  up and
  running. As far as I can tell dansguardian is not pre-installed  
  on the
  XS in XS 0.4.
 
  What default permissions should be provided for DansGuardian ?
  What list of banned sites and keywords ?
 
  No real disagreement.  But one of the issues with DansGuardian is
  that the
  configuration reflects local mores, and it is difficult to provide a
  default.
  How do we ensure that a deployment provides the configuration files ?
 
  Cheers,
  wad
 
 
 

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Re: [Server-devel] What's cooking in the XS pot this week (2008-10--01)

2008-10-02 Thread Bryan Berry
On Fri, 2008-10-03 at 18:09 +1300, Martin Langhoff wrote:
 On Fri, Oct 3, 2008 at 4:51 PM, Bryan Berry [EMAIL PROTECTED] wrote:
  We will be setting up two labs here in Nepal, one in the next couple
  weeks and likely one in the first week of November at Nepal's Dept of
  Education. Depending on our experiences in those labs, we want to roll
  out a new version of the XS in November to our two pilot schools and
  possibly a new pilot school.
 
 I'm very interested in hearing about those experiences.

this depends on how much progress Tony can make. Unfortunately, too much
management crap and talking w/ donors keeps me from spending enough time
on the XS

  w/ two exceptions. We still find it a bear to install the XS from
  scratch. That could be our fault but it needs to be easier to set up
  ejabberd properly. It also needs to be easier to get dansguardian up and
  running. As far as I can tell dansguardian is not pre-installed on the
  XS in XS 0.4.
 
 How happy are you with DanGuardian? Is it a useful filter?

We use it internally w/in our office and we are happy w/ it. We use it
locally to eat our own dog food. By default it blocks a lot if not
most content on the Internet, including stuff that doesn't seem
objectionable at all.

I think dans is essential because it will keep the adults from using up
all the bandwidth to look at porn. the secondary reason, to protect kids
is also important ;)

 In terms of install we have some proposed patches to the ejabberd
 config issues, so it's likely to be sorted in 0.5 or 0.6.
 
  Our volunteer Tony Anderson has been working on this and has a better
  understanding of the problems we are having.
 
 Right - keen on hearing your notes Tony :-)
 
 Also - as discussed with Wad, I'll be interested in suggestions on how
 to handle the local rulemaking both for small pilots and large
 deployments.
 
 cheers.
 
 
 
 m

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Re: [Server-devel] XS_0_4 install]

2008-09-30 Thread Bryan Berry
I can't remember precisely, but I thought I started ejabberd after
running domain_config, but I could be mistaken.

Tony, did u start ejabberd before or after running domain_config on ur
latest install?

On Wed, 2008-10-01 at 11:13 +1300, Martin Langhoff wrote:
 On Tue, Sep 30, 2008 at 5:18 PM, Bryan Berry [EMAIL PROTECTED] wrote:
  What's more concerning to me is that ejabberd has never once worked for
  me out-of-box. I have always had to reinstall it before getting it to
  work. Has anyone out there gotten ejabberd to work consistently on new
  XS installs w/ reinstalling it?
 
 That sounds like you might be trying to start it before running domain_config.
 
 It's a tiny change to the installation workflow outlined in the doco,
 but can trip people up. We could change the init script to check for
 that case and refuse to start.
 
 cheers,
 
 
 
 m
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Re: [Server-devel] offline moodle

2008-09-03 Thread Bryan Berry
On Tue, 2008-09-02 at 22:57 +0200, Tony Anderson wrote:
 Hi,
 
 My apologies - I need to do some research on how to setup the 
 repo.or.cz. As an immediate expedient, I have attached the relevant 
 files to this email. When I get a little time, I will set this up 
 properly. The readme tries to describe the files and how they are used.
 

hey Tony, this is a good start. I have a somewhat different workflow in
mind. Here is a narrative that describes what I am thinking

User Story 1: Intermittent School attendance and School Server Outage

Monday
1. Kid goes to class
2. Teacher directs kids Moodle site
3. Kid navigates to Moodle Module for Class 2 math for the current month
4. Kid clicks 'download' link next Moodle module
5. This action downloads a the moodle module as a .xo bundle and
locally installs it to the XO
5.1 Inside the module are readings, pictures, animations, etc. all
available offline
6. School ends on Monday

Tuesday
Kid can't go to school. Mom and little brother are sick, has to take
care of them. Kid opens up XO and offline Moodle activity he downloaded
the day before. He does lessons that show him basic concepts, introduce
him to basic animations using activities like Etoys, and reads
explanations that answer some of the things he doesn't understand.

Wednesday
Kid still can't go to school. Has to help out in the fields. Later that
day the kid spends some time w/ the Moodle module

Thursday
Kid goes back to school. Kid isn't behind the other because he followed
the lesson plan at home. This has social importance that shouldn't be
understated. 

Over night there was an electrical surge that fried the school server.
The teacher can still instruct using the XO because she has it installed
locally as an activity and so do the kids.


The key here is that we need to package each offline moodle course as
an .XO Activity Bundle. http://wiki.laptop.org/go/Activity_bundles

Getting started, we only need the most basic features of Moodle.
Basically page navigation and the ability to display flash animations
and embedded pdfs for the supplementary readings. 

In time we can look at adding more dynamic stuff like access to the
gradebook but that can wait. In Nepal's context, our kids have no
libraries and maybe 4 small coursebooks.

Hope this helps and sorry I haven't been able to provide you w/ more
feedback earlier.

Pls post our correspondence regarding Offline Moodle to the
Server-Developers mailing list.
http://lists.laptop.org/listinfo/server-devel



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Re: [Server-devel] offline moodle

2008-09-03 Thread Bryan Berry
On Thu, 2008-09-04 at 12:43 +1200, Martin Langhoff wrote:
 On Wed, Sep 3, 2008 at 11:13 PM, Bryan Berry [EMAIL PROTECTED] wrote:
  hey Tony, this is a good start. I have a somewhat different workflow in
  mind. Here is a narrative that describes what I am thinking
 
  User Story 1: Intermittent School attendance and School Server Outage
 
 Your user story is roughly what offline moodle is aiming for, except
 that by the magic of using GG, step 5 'downloads' content  (and JS
 code) _to Browse_. Content that Browse can navigate locally, even if
 the network server is not available.

Then I have several questions, how many courses would offline moodle
cache locally? And how could a kid dump one course they took offline but
keep others? To browse to a cached course would gears have to cache all
the pages on the way to cached course? Or for the kid to bookmark the
cached course and use it to access it later? 

I think a bookmark wouldn't be very intuitive. 

 So instead of opening a dedicated 'activity', users go to Browse and
 when they click on the 'Schoolserver' link Gears takes over (if the XS
 is not reachable) and they can use offline moodle.
 
  The key here is that we need to package each offline moodle course
 as
  an .XO Activity Bundle. http://wiki.laptop.org/go/Activity_bundles
 
 IMO that path would be a huge amount of work, and a bit of a dead end
 WRT updates and such. Cant' really recommend it. It is also a bespoke
 effort- nothing else supports activity bundles, so there's no
 incentive for Moodle to remain compatible to it.

Sure, but my focus is making it easy for the kids to easily view
multiple courses offline. I am only interested in Offline Moodle insofar
as it supports that goal.


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Re: [Server-devel] offline moodle

2008-09-03 Thread Bryan Berry
On Thu, 2008-09-04 at 15:10 +1200, Martin Langhoff wrote:

good to hear we're on the same page.

 AIUI, the user only has to get to the initial moodle page, and GG
 should take care of the rest.

you've reached beyond my geek lingo, what on earth does AIUI mean? :)

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Re: [Server-devel] Reschedule XS meeting for Friday Aug 15 - or 10 PM Aug 14 EST ---- was (Re: not up for Friday meeting about the XS)

2008-08-14 Thread Bryan Berry
great see you guys tomorrow!
On Thu, 2008-08-14 at 18:30 +1200, Martin Langhoff wrote:
 So, we are all set. In about 18hs we'll be having another meeting. The
 wikipage with the info is here:
 
  http://wiki.laptop.org/go/XS_Conf_08_AUG_07_Meeting
 
 I've put there a draft agenda from Bryan (feel free to add/correct!) and 
 myself.
 
 cheers,
 
 
 
 m
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Re: [Server-devel] Reschedule XS meeting for Friday Aug 15 - or 10 PM Aug 14 EST ---- was (Re: not up for Friday meeting about the XS)

2008-08-10 Thread Bryan Berry
On Sun, 2008-08-10 at 18:52 +1200, Martin Langhoff wrote:

 If we are having a regular XS meeting, I also have to consider what we
 are doing targetting all our other deployments, some of them with
 thousands of servers :-)

Absolutely. We may be a small deployment but our work can benefit much
larger deployments.

 I'll be very interested in 1, 3 and 5, wanting to see how we can make
 those efforts reusable elsewhere :-) --

I really hope so. 

 WRT 3 one thing that would be great is an exporter from the fedora
 repo to a static representation, or to something we can search  serve
 easily, so we don't have to carry the fedora sw itself on the XS. I've
 worked a bit with it, and while usually the repos hosted in it have
 content that is _gold_, I don't think the sw itself adds any value on
 the XS.

The great thing about the fedora-commons software is the search
functionality. Could we actually use search on a static representation
of the fedora-commons repository?

Ultimately, we want to put a lot of Nepali art and music on the XS. A
searchable repository will be key to accessing those resources.

In case David hasn't explained earlier, here is why hosting a mail
server on the XS is important to us.

The teachers aren't using their XO's as much as we would like them too.
We are looking for applications that will appeal directly to them and
compel them to use their XO's more frequently. We think e-mail is one
such application.

The Internet connection to our schools is not very reliable and we can
only afford 64K per school due to our budget constraints and the high
cost of Internet access in Nepal. E-mail is much better suited to this
low-bandwidth environment.

While it may not be right for every OLPC deployment, it's a good choice
for us in Nepal.

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[Server-devel] Reschedule XS meeting for Friday Aug 15 - or 10 PM Aug 14 EST ---- was (Re: not up for Friday meeting about the XS)

2008-08-09 Thread Bryan Berry
feeling better now, antibiotics really work :)

How about same time this upcoming Friday? Will work on an agenda w/
David on Monday.

I see the key purpose of this meeting is to let you folks what
additional functionality we are working on for Nepal's XS and to make
sure that our additions don't conflict w/ future changes to the
underlying XS.

Here is the additional stuff we are looking to build into the XS over
the next 6 months:

1) Customized Nepali version of Moodle
2) Mail server using Squirrel Mail*
3) Setting up a local version of Nepal's E-Library on the XS, a copy of
Nepal's current E-Library  http://pustakalaya.olenepal.org which uses
the open-source fedora-commons repository software.
4) and more stuff that I can't remember  at the moment.
5) Connecting schools through ejabberd

* Some of these changes are targeted more at the teachers than the kids.
We are concerned that the teachers are using the XO's much less than the
kids and thus less familiar w/ them. We think e-mail is a relatively
easy way to get them to use the XO to the amount of effort to get it
running consistently. VoIP would be more effective but would require
much more effort.

On Thu, 2008-08-07 at 20:01 -0400, Jim Gettys wrote:
 
 On Fri, 2008-08-08 at 08:48 +1200, Martin Langhoff wrote:
  On Fri, Aug 8, 2008 at 3:48 AM, Greg Smith [EMAIL PROTECTED] wrote:
   I'm OK with reschedule. How about next week at the same time?
  
   Hope you feel better soon.
  
  Same here. Postpone 7 days? Can Jim make it too next week?
 I think so.
   - Jim
 
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Re: [Server-devel] Reschedule XS meeting for Friday Aug 15 - or 10 PM Aug 14 EST ---- was (Re: not up for Friday meeting about the XS)

2008-08-09 Thread Bryan Berry
thanks Michael,

After we get our top priorities working consistently I will definitely
take a closer look at voip and try to look up the folks at fedora.


On Sat, 2008-08-09 at 10:47 -0400, Michael Stone wrote:
 On Sat, Aug 09, 2008 at 12:11:56PM +0545, Bryan Berry wrote:
 VoIP would be more effective but would require much more effort.
 
 Fedora recently set up its own VOIP system, so there may be experts
 lurking nearby who could be tempted into assisting you.
 
 Michael
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[Server-devel] not up for Friday meeting about the XS

2008-08-07 Thread Bryan Berry
Hey guys, 

I am still not feeling well and not sure I can make tomorrow's meeting. 

Can we postpone it until next week?

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Re: [Server-devel] Time for another Server-Devel Meeting IRC or Skype?

2008-08-05 Thread Bryan Berry
I am sick in bed and too tired to really think. will work on a meeting
agenda tomorrow
On Tue, 2008-08-05 at 07:32 -0400, Greg Smith wrote:
 Hi Guys,
 
 I'm in for Thursday 2PM NZ, 7:45AM Nepal, 10PM US ET.
 
 On irc.freenode.net #olpc-meeting?
 
 Let's set an agenda now and keep it to one hour if we can.
 
 Thanks,
 
 Greg S
 
 PS what's up with the 15 minute Nepal offset? That's even stranger than 
 India time ;-)
 
 Bryan Berry wrote:
  On Tue, 2008-08-05 at 10:54 +1200, Martin Langhoff wrote:
  Looking at suitable times, I am thinking of this Friday (NZ time,
  Thursday for everyone else ;-) ) - look at:
  http://worldtimeserver.com/meeting-planner-times.aspx?L0=NZL1=NPL2=GBL3=US-MAL4=Day=8Mon=8Y=2008
 
  It is hard to coordinate a good time for Nepal and NZ and the American
  continent. It would be fantastic if Greg Smith can make it - I am
  thinking
 
   - 2PM - early morn for Nepal, 10pm for 1CC
   - 11PM - late night for me, easy for everyone else! :-/
  
  Great,
  
  Friday, 7:45 AM is a bit early for Kathmandu but it works for us 
  
  Skype will work if it is less than 7 people but gets too messy w/ more.
  w/ 7+ people I prefer IRC.
  
  David and I will be there
  
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[Server-devel] Time for another Server-Devel Meeting IRC or Skype?

2008-08-04 Thread Bryan Berry
Martin,

We are putting a lot of work into the XS here in Nepal after a long
absence.

David Van Assche is now w/ OLE nepal full-time in Kathmandu working on
the XS. We want to make sure we are moving in the same direction and not
waste anyone's time.

How about an IRC or Skype meeting open to all those interested in the XS
later this week? If it's an IRC meeting I will be happy to post it to
the wiki.

Regards,

Bryan Berry
OLE Nepal

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[Server-devel] More XS notes

2008-07-31 Thread Bryan Berry
* The olpc-scripts in /etc/sysconfig/olpc-scripts/ are just plain
confusing.

* Ejabberd is extremely flaky
Even the smallest changes to the ejabberd.cfg file seem to make it
crash. I added and extra admin acct to the admins acl on my laptop's
ejabberd install and now ejabberd won't run. 

Sometimes it seems that the only way to get ejabberd running properly
was to reboot the machine. Perhaps this was due to funky stuff hanging
out in the Mnesia database? Can anyone tell me more about this?

Ejabberd can be used w/ a relational database such as postgres instead
of Mnesia. Can anyone comment on the advantages, disadvantages of this?

* Shorewall
We have installed shorewall and using it to manage iptables. 

* Dansguardian and Squid up and running. Dansguardian was a bit tricky,
particularly the Shorewall configuration.

* Moodle
Got it up and running using Postrgres, which was bit tricky

Questions:
1) Easier ways to work w/ ejabberd?
2) anyone succeeded in interconnecting ejabberd b/w two schools?
3) Martin: can you comment on the use of DOOR or Fedora Commons as a
local repository?
4) What is the current state of integrating fedora-commons and Moodle?

Todo:
1) test out ds-backup
2) test out XS features fully w/ actual XO's
3) test the XS for performance and disaster recovery
5) Get fedora-commons running on the XS and integrate w/ Moodle
(longterm project)


Will send out our config notes for what we have done so far later today.


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[Server-devel] incomplete XS install notes

2008-07-31 Thread Bryan Berry
h1. Schoolserver

These are the notes from XS configuration David Van Assche have been
working on this week. It is not yet complete. I will try to put them on
the wiki when they are complete. I haven't included several crucial
pieces of information such as the Shorewall configuration files.

Step 1. Install from .iso

h3. Network Configuration
* IP
** rm /etc/sysconfig/network-scripts/ifcfg-msh*
** rm /etc/sysconfig/network-scripts/ifcfg-eth2-4
** vi /etc/sysconfig/network-scripts/ifcfg-eth0 and ifcfg-eth1 change to
static IP Addresses
** ifcfg-eth0   change to WAN address, in OLE office 192.168.5.xx,
disable ipv6  causes problems w/ ejabberd
** ifcfg-eth1   leave as default
** vi /etc/dhcpd.conf   add Internet DNS under  option
domain-name-servers  in addition to 172.18.0.1
* DNS changes
** /etc/sysconfig/olpc-scripts/domain_config sanepa.schoolnet.gov.np
where sanepa is the school
** /etc/sysconfig/network   change hostname to
schoolserver.sanepa.schoolnet.gov.np
** cd /var/named
** sed -i 's/random.xs.laptop.org/sanepa.schoolnet.gov.np/g' school*  
** Change comments (#) and C in /var/named/school.internal.zone.db to
; and CNAME  (fixed in XS_165)

h3. Squid 
* -- /etc/squid/squid.conf 
** at line 117 change: dns_nameservers  172.18.0.1 192.168.5.1
** acl school src 172.18.0.0/255.255.0.0 192.168.5.0/255.255.255.0  #
add external and internal networks

h3. Moodle
* yum install moodle postgresql-server
* service postgresql initdb
* sudo -u postgres createuser -D -A -P moodle
* sudo -u postgres createdb -E utf8 -O moodle moodle
* sudo -u postgres psql moodle
  # ALTER USER postgres WITH PASSWORD 'moodle';
  # \q
* sudo nano /etc/postgresql/8.1/main/pg_hba.conf  change Method for both
host entries to md5
* sudo /etc/init.d/postgresql restart


h3. Ejabberd
* add this line to /etc/ejabberd/ejabberd.cfg
  {acl, admin, {user, admin, schoolserver.sanepa.schoolnet.gov.np}}.
  Don't forget the period at the end!
* cd /etc/init.d/
* chkconfig --level 345 ejabberd
* disable ipv6 by removing it from 
  {5280, ejabberd_http, [ 
 ipv6,
* Logging on to http://schoolserver:5280/admin provide full username
[EMAIL PROTECTED]
* Create online group @online@

h3. Dansguardian
* zlib-devel pcre-devel autoconf automake gcc-c++ libtool compat-gcc-3.4
* used rpm from dries repo, add to testing.repo, or stable.repo if you
are using that repo
   [dries]
name=Extra Fedora rpms dries - $releasever - $basearch

baseurl=http://ftp.belnet.be/packages/dries.ulyssis.org/fedora/linux/$releasever/$basearch/dries/RPMS/
* yum update
* yum install dansguardian
* settings in /etc/dansguardian/dansguardian.conf
** filterport=8081  # not 8080
** loglevel =1
** loglocation = /var/log/dansguardian/access.log
** urlcachenumber = 5000
** reverseaddresslookups = on
** reverseclientiplookups = on
** maxchildren=250
** minsparechildren=8
** daemonuser=dansguardian
** daemongroup=dansguardian
* settings in bannedextensionslist
** commented out bans for UNIX archive file types

h3. Shorewall
* yum install shorewall
* settings in /etc/shorewall/shorewall.conf
** Startup_Enabled=Yes
** LOGFILE=/var/log/shorewall
** LOGRATE= ? 
** LOGBURST = ?  to be set
** BRIDGING = Yes
* /etc/shorewall/masq
** eth0 eth1   -- this bridges b/w the two
* /etc/shorewall/interfaces
** net eth0
** loc eth1
* /etc/shorewall/zones  -- these changes make the interfaces use ipv4
** loc   -
** fwfirewall
** net   -
* Setting up policy -- /etc/shorewall/policy
* Setting up Rules -- allow access to ssh at port , ejabberd at 5280
* add to Rules   
   REDIRECT   loc   8081TCP 

h3. Todo

Dansguardian
* Need to consider adding blocks for stuff like myspace.com 
* decide on naughtyness limit set in dansguardianf1.conf ?Higher or
lower? Real concern is the parents and teachers viewing inappropriate
stuff, less so the kids.
* decide which file extensions to ban

Issues:
* Ejabberd a total PITA to set up and modify. We spent 60% of install
time fighting ejabberd.
* Currently XO's seem to need a fqdn to access jabber. This means every
school needs a different XO image configuration. Major hassle
* Routing not yet working properly
* The XS wiki entries are a mess and often provide incorrect information


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[Server-devel] debuginfo repositories for testing not valid

2008-07-29 Thread Bryan Berry
fyi,

There are two repos in the testing.repo that are not valid

[fedora-debuginfo-testing]

[updates-debuginfo-testing]




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Re: [Server-devel] schoolnet activities?

2008-07-28 Thread Bryan Berry
Bernie, 

Have we configured Browse to display the Flash activities automatically?

Also, have we sugarized Firefox 3?

David, you can install firefox 3 as an rpm however we haven't completed
sugarizing it. Currently we are launching it from the command line. We
will sugarize it as we are using for the next generation of E-Paath
activities.

Also, check out our E-Library that we have developed
http://pustakalaya.olenepal.org  all built w/ open-source components and
and can scale to millions of objects. May be of interest to you.

On Tue, 2008-07-29 at 15:03 +1100, David Leeming wrote:
 You can configure the XO so it loads the SWF files rather showing a
 blank screen or just use firefox 3
 
 Can you let me know how to configure it, and install firefox 3? 
 
 
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[Server-devel] out of the loop on XS work -- What's the latest?

2008-07-22 Thread Bryan Berry
Hey guys,

I have quite out of the loop on server-devel, been focused on internal
office sysadmin stuff and our e-library. Check it out
http://pustakalaya.olenepal.org  I would love to see it somehow work w/
Pootle.

I need to set up a testbed in our office w/ the latest XS stuff. Is
there a new version since 163? If not, how can I update individual parts
like ds_backup and other stuff I am not up on? edublog??

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[Server-devel] Puppet -- looks like a neat tool for managing school servers

2008-07-12 Thread Bryan Berry
http://reductivelabs.com/trac/puppet/wiki/PuppetIntroduction

I will probably play w/ it tomorrow. could be a neat tool for keeping
xs's up-to-date

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[Server-devel] jabber now working

2008-07-10 Thread Bryan Berry
not sure exactly how it worked but I think setting the IP address
listed /etc/hosts 127.0.0.1 to the fqdn does the trick

previously had the LAN interface followed by fqdn in /etc/hosts

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[Server-devel] jabber now working

2008-07-10 Thread Bryan Berry
not sure exactly how it worked but I think setting the IP address
listed /etc/hosts 127.0.0.1 to the fqdn does the trick

previously had the LAN interface followed by fqdn in /etc/hosts

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Re: [Server-devel] Wikiserver on XS

2008-07-01 Thread Bryan Berry
good thing there are brighter bulbs involved in olpc than myself :)

cbj I will have to look at your code for wikislice and see how it
harvests the images from wikipedia. I was having the most trouble w/
that part. Perhaps wikislice can easily be reused for wiktionary

we like wiktionary because it is quite small and it has audio samples
that say the word. Nepali kids seem really like the latter feature.

-Original Message-
From: Chris Ball [EMAIL PROTECTED]
To: Bryan Berry [EMAIL PROTECTED]
Cc: server-devel@lists.laptop.org
Subject: Re: [Server-devel] Wikiserver on XS
Date: Mon, 30 Jun 2008 12:06:51 -0400

Hi,

I tried setting up a Wiktionary server on a shared server that our
pilots have access to and it was a major pain in the ass. After 3
days I couldn't get it to work. I had a lot of trouble downloading
and importing the images, perhaps Chris Ball's wikislices gets this
right. I will have to look at the code and ask him.

Oh, you mean using the wikislice technology to build a snapshot of the
dictionary data from wiktionary, rather than the wikipedia data?  That's
an interesting idea.

The wikislices are alright but they don't allow for searching for
content which I think is an essential feature.

Yes, they do; when you run the Wikipedia activity, there's a search
toolbar that searches against the local index.  (You might be confusing
the Wikipedia activity with some hand-made Wikislice HTML content
bundles that SJ made quite a while ago.)

- Chris.

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[Server-devel] Customizing build 703 for mass deployment

2008-04-20 Thread Bryan Berry
I have created a wiki page detailing the customizations Nepal has
made to the 703 image, which includes installation of the gnuchess, and
man page rpms, the proprietary flash player, changing the display order
of activities, among other changes
http://wiki.laptop.org/go/Nepal:_Testing%2C_QA%
2C_and_Configuration#Custom_XO_Build_Configuration  

Currently, I use an extremeley inelegant method to create standard
images for Nepal's deployment and I would very much like assistance in
finding a more elegant method. Michael Stone has been helping me hack
jffs2 images but I still haven't found a better method than booting into
an os image, loading rpms and changing settings, then using save-nand to
create a custom .img file.


Bryan W. Berry
Systems Engineer
OLE Nepal, http://www.olenepal.org


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Re: [Server-devel] OT is there a Content or Curriculum olpc email list?

2008-04-03 Thread Bryan Berry
Yama wrote:
Do any of you know if such a content or curriculum list exists and how
I can sign up for it?

To my knowledge, no. But we definitely need one. I know that Bipul,
Kamana, and Saurav from our team would be very much interested. myself
as well.

You can start one yourself. I believe you can just send an e-mail to
[EMAIL PROTECTED] to request one.


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Re: [Server-devel] [laptop.org #8321] Questions about XO mesh networking

2008-03-28 Thread Bryan Berry
I am cc'ing Martin Langhoff, John Watlington who are in charge of the
School Server at OLPC

 1.  ideally the school server (running XS) will have 3 active antenna
 each running on a diff channel (1,3,6) and XOs will connect to one of
 these.

2. Or should we replace the WRT54G with
 another AP/Router in the short term?

I would replace the WRT54G. I hate them. I have had 3 fail on me in the
last year. I would get 3 other wireless routers. I like DLink


My understanding is that in a dense deployment such as yours you should
use a regular wireless router and not the active antennas, for the short
and the long term. Wad and Michailis, pls correct me if I am wrong.

3. Running ejabberd on a central server means that collaboration
 features will work while the XOs are connected to an AP (or school
 server with active antenna)? The only change we need to make on the XOs
 is to support this, is to change the jabber server using
 sugar-control-panel?

Correct

4. Can we expect to get around 50 XOs per channel?


Don't know, sounds good to me. We are planning 60 XO's per channel w/ a 
Deliberant Radio + Omni 12 dbi antenna
(Dev can provide more details)

Wad, Michailis can you advise?


 6. Are the specs here for the hardware of a server here still current :
 http://wiki.laptop.org/go/XSX_Server_Implementation

I don't know about this. We are using different specs in Nepal

1.8 GHz Intel Core duo
1 GB of RAM
120 GB Hard drive

We have a souped up XS because we intend to use Moodle and Mediawiki
extensively. 

Currently the only hardware we
 have to run XS would be one of the XOs or an old IBM/Panasonic laptop
 (PIII800)

This might work for basic networking services but not any content
management stuff. It might also get bogged down when running Squid.


You should join server-devel mailing list to keep on top of XS testing
and development.  http://lists.laptop.org/listinfo/server-devel

Good luck!

Bryan
OLE Nepal
Kathmandu

On Fri, 2008-03-28 at 14:24 +1100, matt wolstencroft wrote:
 Hi,
 Many thanks for all your responses. Before I answer your queries, I just
 want to clarify a few points :
 
 1. I have taken another look at the server docs and my understanding is
 that  ideally the school server (running XS) will have 3 active antenna
 each running on a diff channel (1,3,6) and XOs will connect to one of
 these. Other wireless equipment would connect to a sep standard wireless
 AP connected to the server. The server is then connected to the WAN
 modem and acts as router, firewall and DHCP for the 3 networks. Is this
 a correct summary of the ideal situation?
 
 2. Without any active antenna, would a short term solution be to use a
 standard AP and connect it to our WRT54G (with wireless disabled on
 this)? Once we have a stable XS server we can remove the WRT54G and
 connect the AP to the server? Or should we replace the WRT54G with
 another AP/Router in the short term?
 
 3. Running ejabberd on a central server means that collaboration
 features will work while the XOs are connected to an AP (or school
 server with active antenna)? The only change we need to make on the XOs
 is to support this, is to change the jabber server using
 sugar-control-panel?
 
 4. Can we expect to get around 50 XOs per channel?
 
 5. Would you recommend the use of an XO as school server and if so how
 many clients would you say it would support? 
 
 6. Are the specs here for the hardware of a server here still current :
 http://wiki.laptop.org/go/XSX_Server_Implementation
 
 In response to your queries :
 
  Do you have a server (e.g. school server) in place?
 
 We do not currently have a school server in place. As an interim we have
 been using an XO with lighttpd and an rsyncd running. This was just a
 quick way to allow us to distribute files to the XOs and backup up the
 olpc home directories prior to updating the laptops. The long term plan
 is to have a server in place running XS. Currently the only hardware we
 have to run XS would be one of the XOs or an old IBM/Panasonic laptop
 (PIII800)
 
  Minimum requirements? 
 
 - network needs to support existing IBM/panasonic laptops used by
 teachers and students (for certain apps that are not currently running
 on the XOs e.g. dyned). These have pcmcia orinoco 802.11b silver cards
 - students need internet connectivity
 - XO backups
 - proxy with filtering capability
 - DHCP
 - DNS
 - firewall/router
 - ability to power external antenna for remote sites
 
  Time frames?
 
 The deadline given to me by the school administrator for having basic
 network services provided and an outline for a long term solution is the
 11th April. It would be good to have a working wireless network as soon
 as possible though, however I am not sure when funds will be available
 for new equipment.
 
 Thanks again for your invaluable help,
 
 Regards
 Matt
 
 On Thu, 27 Mar 2008 08:06:20 -0400, Greg Smith (gregmsmi)
 [EMAIL PROTECTED] said:
  Hi Matt, (Bryan or Sulochan, please see questions for you 

[Server-devel] reiterate need for simplified Moodle and Mediawiki UI

2008-03-25 Thread Bryan Berry
Hey guys, 

Great meeting last night.

I made a point last night but I just want to reiterate it because it is
quite important for us here in Nepal.

The regular Moodle and Mediawiki UI's are far too complex for novice
computer users. I am specifically thinking of teachers  who are very
literate but not used to dealing with complex UI's w/ lots of buttons
and text. The kids will figure it out but we need to simplify the Moodle
and Mediawiki UI's so that teachers feel comfortable w/ them.

We want to use Moodle to lay out lesson plans for the teachers. These
lesson plans will give the teachers a clear idea of how to use the XO's
and activities in the classroom setting. W/out lesson plans many will
just go back to their old ways of doing things and not integrate the
XO's (and constructivism) into their regular activities.

I still think Moodle and mediawiki are the right tools. We just need to
make them conform to the Sugar Human Interface Guidelines. I would like
to work on this but teacher training starts on Saturday and I am way
behind! :)

Martin, I believe you mentioned in the meeting yesterday that you will
look for k-6 resources for Moodle. I look forward to seeing those. 


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Re: [Server-devel] Web-based Management Interface for the XS

2008-03-19 Thread Bryan Berry
Martin, have you also looked at http://ebox-platform.com/ ? I have
downloaded and intend to play w/ it today. From the screenshots and
reviews looks quite nice. From what I can tell it is specific to Debian.

If you do intend to build a web-based interface from scratch, can you
use a pretty language like Python or Ruby to do it? Perl and PHP make my
eyes bleed. Both Django (Python) and Ruby on Rails seem like great
frameworks for rapid development.

I also like RubyonRails because there is momentum in the FedoraCommons
community (E-Library) toward using Rails apps for front-end services.
Then I could reuse the skills I have yet to acquire!


On Wed, 2008-03-19 at 07:33 -0400, Martin Langhoff wrote:
 On Wed, Mar 19, 2008 at 12:17 AM, John Watlington [EMAIL PROTECTED] wrote:
In the long term, there appears to be concern that the existing
administration interfaces for servers are not sufficient for our
needs.
I personally not worked w/ webmin or the admin interface for Centos
SME
Server so I cannot comment from experience.
 
   I've worked with Webmin, and the user experience is tolerable.
   Our security architect (Ivan) had less than noble things to say about
   it's implementation, dissuading us from using it.
 
 Here I am with Ivan - Webmin is the spawn of the devil ;-) - but
 beyond that, I've seen quite a few web admin UIs, and though some are
 good, none are what we are after IMHO. A custom web-based admin UI
 might be something we have to write custom for the XS (*rolls up
 sleeves*). I am hope we can discuss and sketch some plans for this in
 the coming days...
 
   I've slowly added scripts automating most of the configuration for
   small systems.   We are really close to providing a file either on
   disk or on USB which configures the system  --- it is a trivial
   programming
   task once the user experience and configuration info have been
   agreed upon.
 
 Cool - I'll be looking into those...
 
   Larger systems (NYC, Birmingham) are a different
   story, as their network configuration is radically different.  We will
   probably fork builds to handle their case, or move to just supporting
   service packages.
 
 Can we encapsulate local config in a local rpm package with fancy
 post-inst scripts?
 
 cheers,
 
 
 
 martin

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