Re: Where to learn Linux?
Writing an email without the screen is perfectly doable even within vanilla
windows machine, with nothing installed.
Say, for XP: Windows key - down down - Enter [Now outlook is running] -
Ctrl+n - write email address - Tab Tab Tab - write subject - Tab -
Write Content - Ctrl+Enter.
Not to mention how easier it is when launchy style programs are installed.
And in both systems it is impossible to do that unless you have a fairly
good knowledge of the system (which email client is installed? Should you
type mutt or pine? etc.)
2010/3/14 Dov Grobgeld dov.grobg...@gmail.com
On Sun, Mar 14, 2010 at 14:37, Jonathan Ben Avraham y...@tkos.co.ilwrote:
Even a guy who just shows up with a Dvorak keyboard, no mouse and does
everything inside of EMACS gets an offer.
This more or less describes me, so do I get the job? :-) Also reminds me of
the time a number of years ago when I had turned in my monitor for repair,
and then returned home to my computer without a monitor. Just for the fun of
it and to prove I don't know what, I turned the computer on, logged in,
wrote an email of a page and a half, printed it out to see that I didn't
make too many mistakes which I hadn't and then and sent it off. When I tell
that story to Windows users, they don't even understand what I'm talking
about.
Good luck,
- yba
On Sun, 14 Mar 2010, Dotan Cohen wrote:
Date: Sun, 14 Mar 2010 13:34:04 +0200
From: Dotan Cohen dotanco...@gmail.com
To: linux-il. linux-il@cs.huji.ac.il
Subject: Where to learn Linux?
I have been using Linux as an end user for several years, but now I
think that I might like to make a career out of *nix administration.
Where are some good places to get a certificate from? Is an online
certificate as good as an offline course? What online certificates are
honourable? What real-world courses in Israel are recommended?
Thanks!
--
EE 77 7F 30 4A 64 2E C5 83 5F E7 49 A6 82 29 BA~. .~ Tk Open
Systems
=}ooO--U--Ooo{=
- y...@tkos.co.il - tel: +972.2.679.5364, http://www.tkos.co.il -
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web based mail front end with pgp/gpg support?
Hello, We are pushing the company to use PGP/GPG for secure e-mail and while we Linux people have no problem using Thunderbird+Enigmail the windows and mac users find it a bit difficult to get it working on their laptops/desktops. We use a hosted Exchange server in the company and this is a given. Can't change that. Someone from customer engineering mentioned that one of our customers provide a web-based PGP-enabled mail interface which allows him to send and receive pgp email through a browser, but he doesn't know which product it is and I'll bet is commercial anyway. Is anyone aware of something like this based on Open-Source? I found a few plug-ins for Firefox to do GPG/PGP on parts of web page which are claimed to work well with GMail, but I suspect that's not quite it. I also saw some reference to SquirrelMail PGP plugin (http://squirrelmail.org/plugin_view.php?id=153). RoundCube, which as far as I remember, looks much better, doesn't have PGP support (http://trac.roundcube.net/ticket/1440396). Any ideas? Thanks, --Amos ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: web based mail front end with pgp/gpg support?
Hi, There is a Firefox plugin to encrypt emails, it does this without regard to what web interface is used: https://addons.mozilla.org/en-US/firefox/addon/4645 On Mon, Mar 15, 2010 at 9:07 AM, Amos Shapira amos.shap...@gmail.com wrote: Hello, We are pushing the company to use PGP/GPG for secure e-mail and while we Linux people have no problem using Thunderbird+Enigmail the windows and mac users find it a bit difficult to get it working on their laptops/desktops. We use a hosted Exchange server in the company and this is a given. Can't change that. Someone from customer engineering mentioned that one of our customers provide a web-based PGP-enabled mail interface which allows him to send and receive pgp email through a browser, but he doesn't know which product it is and I'll bet is commercial anyway. Is anyone aware of something like this based on Open-Source? I found a few plug-ins for Firefox to do GPG/PGP on parts of web page which are claimed to work well with GMail, but I suspect that's not quite it. I also saw some reference to SquirrelMail PGP plugin (http://squirrelmail.org/plugin_view.php?id=153). RoundCube, which as far as I remember, looks much better, doesn't have PGP support (http://trac.roundcube.net/ticket/1440396). Any ideas? Thanks, --Amos ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Where to learn Linux?
I think it there is something more subtle going on, and that is the concept
of a state. The state is where you are and I feel the big difference
between GUI and command line operation is in the latter, the state is
available without heavy visual interaction. Once you have used the system
enough, you feel the state, and you build a motoric memory for moving from
one state to another. With GUI systems you never reach that proficiency and
you have to do more guess work and more hunt and peck to move from state to
state. It may be easier the first time to use a GUI, but the second and the
third time, you'd be better off typing the command, because it is much more
repeatable.
So the difference between Unix/Linux and Windows in this sense is that in
Unix/Linux you have full control of the system from the command line where
you can have this feeling for where you are.
Anyhow, this is sliding into something that is quite far off from the
original question.
Regards,
Dov
On Mon, Mar 15, 2010 at 08:06, Elazar Leibovich elaz...@gmail.com wrote:
Writing an email without the screen is perfectly doable even within vanilla
windows machine, with nothing installed.
Say, for XP: Windows key - down down - Enter [Now outlook is running] -
Ctrl+n - write email address - Tab Tab Tab - write subject - Tab -
Write Content - Ctrl+Enter.
Not to mention how easier it is when launchy style programs are installed.
And in both systems it is impossible to do that unless you have a fairly
good knowledge of the system (which email client is installed? Should you
type mutt or pine? etc.)
2010/3/14 Dov Grobgeld dov.grobg...@gmail.com
On Sun, Mar 14, 2010 at 14:37, Jonathan Ben Avraham y...@tkos.co.ilwrote:
Even a guy who just shows up with a Dvorak keyboard, no mouse and does
everything inside of EMACS gets an offer.
This more or less describes me, so do I get the job? :-) Also reminds me
of the time a number of years ago when I had turned in my monitor for
repair, and then returned home to my computer without a monitor. Just for
the fun of it and to prove I don't know what, I turned the computer on,
logged in, wrote an email of a page and a half, printed it out to see that I
didn't make too many mistakes which I hadn't and then and sent it off. When
I tell that story to Windows users, they don't even understand what I'm
talking about.
Good luck,
- yba
On Sun, 14 Mar 2010, Dotan Cohen wrote:
Date: Sun, 14 Mar 2010 13:34:04 +0200
From: Dotan Cohen dotanco...@gmail.com
To: linux-il. linux-il@cs.huji.ac.il
Subject: Where to learn Linux?
I have been using Linux as an end user for several years, but now I
think that I might like to make a career out of *nix administration.
Where are some good places to get a certificate from? Is an online
certificate as good as an offline course? What online certificates are
honourable? What real-world courses in Israel are recommended?
Thanks!
--
EE 77 7F 30 4A 64 2E C5 83 5F E7 49 A6 82 29 BA~. .~ Tk Open
Systems
=}ooO--U--Ooo{=
- y...@tkos.co.il - tel: +972.2.679.5364, http://www.tkos.co.il -
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Re: Where to learn Linux?
Hi Dov,
Not far off at all from the original question. The first thing that I look
for in an employee or consultant is is he has this feel for the state that
you mention. If the employee has only used Windows or Mac at the GUI
level, then the chance of his understanding the system state is very small
because the visual pane of Windows and Mac that is designed to make things
easy effectively prevents all understanding of the system state.
- yba
On Mon, 15 Mar 2010, Dov Grobgeld wrote:
Date: Mon, 15 Mar 2010 09:39:51 +0200
From: Dov Grobgeld dov.grobg...@gmail.com
To: Elazar Leibovich elaz...@gmail.com
Cc: Jonathan Ben Avraham y...@tkos.co.il, linux-il linux-il@cs.huji.ac.il
Subject: Re: Where to learn Linux?
I think it there is something more subtle going on, and that is the concept
of a state. The state is where you are and I feel the big difference
between GUI and command line operation is in the latter, the state is
available without heavy visual interaction. Once you have used the system
enough, you feel the state, and you build a motoric memory for moving from
one state to another. With GUI systems you never reach that proficiency and
you have to do more guess work and more hunt and peck to move from state to
state. It may be easier the first time to use a GUI, but the second and the
third time, you'd be better off typing the command, because it is much more
repeatable.
So the difference between Unix/Linux and Windows in this sense is that in
Unix/Linux you have full control of the system from the command line where
you can have this feeling for where you are.
Anyhow, this is sliding into something that is quite far off from the
original question.
Regards,
Dov
On Mon, Mar 15, 2010 at 08:06, Elazar Leibovich elaz...@gmail.com wrote:
Writing an email without the screen is perfectly doable even within vanilla
windows machine, with nothing installed.
Say, for XP: Windows key - down down - Enter [Now outlook is running] -
Ctrl+n - write email address - Tab Tab Tab - write subject - Tab -
Write Content - Ctrl+Enter.
Not to mention how easier it is when launchy style programs are installed.
And in both systems it is impossible to do that unless you have a fairly
good knowledge of the system (which email client is installed? Should you
type mutt or pine? etc.)
2010/3/14 Dov Grobgeld dov.grobg...@gmail.com
On Sun, Mar 14, 2010 at 14:37, Jonathan Ben Avraham y...@tkos.co.ilwrote:
Even a guy who just shows up with a Dvorak keyboard, no mouse and does
everything inside of EMACS gets an offer.
This more or less describes me, so do I get the job? :-) Also reminds me
of the time a number of years ago when I had turned in my monitor for
repair, and then returned home to my computer without a monitor. Just for
the fun of it and to prove I don't know what, I turned the computer on,
logged in, wrote an email of a page and a half, printed it out to see that I
didn't make too many mistakes which I hadn't and then and sent it off. When
I tell that story to Windows users, they don't even understand what I'm
talking about.
Good luck,
- yba
On Sun, 14 Mar 2010, Dotan Cohen wrote:
Date: Sun, 14 Mar 2010 13:34:04 +0200
From: Dotan Cohen dotanco...@gmail.com
To: linux-il. linux-il@cs.huji.ac.il
Subject: Where to learn Linux?
I have been using Linux as an end user for several years, but now I
think that I might like to make a career out of *nix administration.
Where are some good places to get a certificate from? Is an online
certificate as good as an offline course? What online certificates are
honourable? What real-world courses in Israel are recommended?
Thanks!
--
EE 77 7F 30 4A 64 2E C5 83 5F E7 49 A6 82 29 BA~. .~ Tk Open
Systems
=}ooO--U--Ooo{=
- y...@tkos.co.il - tel: +972.2.679.5364, http://www.tkos.co.il -
___
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--
EE 77 7F 30 4A 64 2E C5 83 5F E7 49 A6 82 29 BA~. .~ Tk Open Systems
=}ooO--U--Ooo{=
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Re: Where to learn Linux?
On 15/03/2010, at 09:53, Jonathan Ben Avraham wrote: Hi Dov, Not far off at all from the original question. The first thing that I look for in an employee or consultant is is he has this feel for the state that you mention. If the employee has only used Windows or Mac at the GUI level, then the chance of his understanding the system state is very small because the visual pane of Windows and Mac that is designed to make things easy effectively prevents all understanding of the system state. Honestly, even though I spend many hours a day on the command line of debian servers, I feel I've ruined myself for linux by delving too far into OS X on the command line :) OS X doesn't prevent understanding of the system state at all, it just doesn't force that understanding. If the desire to delve is present, the command line offers much deeper system access than the GUI ever could. It's very different than linux, though. Someone plugged a USB drive into one of the servers in a data center in the US, and for the life of me, I couldn't think of anything on a debian system that would give me a list of all attached disks. On OS X, I'd just type 'diskutil list' (output at the bottom of this email, if anyone's curious). In the end, dmesg told me where to find the disk, but maybe it's time for some disk utility on linux that's caught up to the present? cfdisk is great if you already know what device you want :) Anyway, back on topic... My company is considering creating a position for a junior sysadmin, and honestly, I'd much rather have a 20-year old with 6 years of playing with servers in his basement than a freshly-minted RHCP or whatever. --sambo Anything that does this on linux? zefat:~ sambo$ diskutil list /dev/disk0 #: TYPE NAMESIZE IDENTIFIER 0: GUID_partition_scheme*500.1 GB disk0 1:EFI 209.7 MB disk0s1 2: Apple_HFS Backup 499.8 GB disk0s2 /dev/disk1 #: TYPE NAMESIZE IDENTIFIER 0: GUID_partition_scheme*250.1 GB disk1 1:EFI 209.7 MB disk1s1 2: Apple_HFS zefat 249.7 GB disk1s2 /dev/disk2 #: TYPE NAMESIZE IDENTIFIER 0: GUID_partition_scheme*1.0 TB disk2 1:EFI 209.7 MB disk2s1 2:ZFS Archive 999.9 GB disk2s2 /dev/disk3 #: TYPE NAMESIZE IDENTIFIER 0: GUID_partition_scheme*1.0 TB disk3 1:EFI 209.7 MB disk3s1 2:ZFS Archive 999.9 GB disk3s2 /dev/disk4 #: TYPE NAMESIZE IDENTIFIER 0: GUID_partition_scheme*1.0 TB disk4 1:EFI 209.7 MB disk4s1 2:ZFS Archive 999.9 GB disk4s2 /dev/disk5 #: TYPE NAMESIZE IDENTIFIER 0: GUID_partition_scheme*1.0 TB disk5 1:EFI 209.7 MB disk5s1 2:ZFS geniza 999.9 GB disk5s2 /dev/disk6 #: TYPE NAMESIZE IDENTIFIER 0: GUID_partition_scheme*1.0 TB disk6 1:EFI 209.7 MB disk6s1 2:ZFS geniza 999.9 GB disk6s2 /dev/disk7 #: TYPE NAMESIZE IDENTIFIER 0: GUID_partition_scheme*1.0 TB disk7 1:EFI 209.7 MB disk7s1 2:ZFS geniza 999.9 GB disk7s2 /dev/disk8 #: TYPE NAMESIZE IDENTIFIER 0: GUID_partition_scheme*1.0 TB disk8 1:EFI 209.7 MB disk8s1 2:ZFS geniza 999.9 GB disk8s2 /dev/disk9 #: TYPE NAMESIZE IDENTIFIER 0: GUID_partition_scheme*1.0 TB disk9 1:EFI 209.7 MB disk9s1 2:ZFS geniza 999.9 GB disk9s2 ___ Linux-il mailing list
Re: Where to learn Linux?
On Mon, Mar 15, 2010 at 10:24 AM, sammy ominsky s...@avoidant.org wrote: snip zefat:~ sambo$ diskutil list /dev/disk0 #: TYPE NAMESIZE IDENTIFIER 0: GUID_partition_scheme*500.1 GB disk0 1:EFI 209.7 MB disk0s1 2: Apple_HFS Backup 499.8 GB disk0s2 /dev/disk1 #: TYPE NAMESIZE IDENTIFIER 0: GUID_partition_scheme*250.1 GB disk1 1:EFI 209.7 MB disk1s1 2: Apple_HFS zefat 249.7 GB disk1s2 /snip That looks somewhat familiar... # fdisk -l Disk /dev/sda: 32.0 GB, 320 bytes 255 heads, 63 sectors/track, 3890 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x### Device Boot Start End Blocks Id System /dev/sda1 1 34 273073+ 83 Linux /dev/sda2 35389030973320 83 Linux Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x### Device Boot Start End Blocks Id System /dev/sdb1 1 34 273073+ 83 Linux /dev/sdb2 35421233559785 83 Linux /dev/sdb34213 121601 942927142+ 83 Linux ? ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Where to learn Linux?
On 15/03/2010, at 10:30, shimi wrote: That looks somewhat familiar... # fdisk -l Exactly what I wanted! Thank you. --sambo ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Where to learn Linux?
On Monday 15 Mar 2010 10:24:04 sammy ominsky wrote: On 15/03/2010, at 09:53, Jonathan Ben Avraham wrote: Hi Dov, Not far off at all from the original question. The first thing that I look for in an employee or consultant is is he has this feel for the state that you mention. If the employee has only used Windows or Mac at the GUI level, then the chance of his understanding the system state is very small because the visual pane of Windows and Mac that is designed to make things easy effectively prevents all understanding of the system state. Honestly, even though I spend many hours a day on the command line of debian servers, I feel I've ruined myself for linux by delving too far into OS X on the command line :) OS X doesn't prevent understanding of the system state at all, it just doesn't force that understanding. If the desire to delve is present, the command line offers much deeper system access than the GUI ever could. It's very different than linux, though. Someone plugged a USB drive into one of the servers in a data center in the US, and for the life of me, I couldn't think of anything on a debian system that would give me a list of all attached disks. On OS X, I'd just type 'diskutil list' (output at the bottom of this email, if anyone's curious). In the end, dmesg told me where to find the disk, but maybe it's time for some disk utility on linux that's caught up to the present? cfdisk is great if you already know what device you want :) Why aren't mount (with no arguments) or df good enough? Regards, Shlomi Fish -- - Shlomi Fish http://www.shlomifish.org/ Original Riddles - http://www.shlomifish.org/puzzles/ Deletionists delete Wikipedia articles that they consider lame. Chuck Norris deletes deletionists whom he considers lame. Please reply to list if it's a mailing list post - http://shlom.in/reply . ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Xen and storage
2010/3/12 Hetz Ben Hamo het...@gmail.com: Hi, I have taken 3 machines for a project: 2 machines will act as Xen servers and one machine will act as storage. The storage box is just a machine with few hard disks connected with a RAID controller. What I would like to do is create few Xen VM's with the fastest possible I/O in terms of storage. I have few options: 1. I can create an LVM on the storage machine, create few Logical Volumes and export them as NFS to the Xen servers and configure each VM to some file images. Problem is, that file I/O with Xen is slower compared working with LVM's. 2. I can create an LVM on the storage machine, create few Logical Volumes, and export those as iSCSI devices. I'm not sure whats the performance of Xen with iSCSI devices exported from the storage box. 3. I can create few partitions on the storage machine, export them as iSCSI devices and do LVM on the Xen servers. Problem: I don't know how much the penalty doing LVM on the Xen machines. My question: What is the best option? Thanks, Hetz I don't have practical experience with hosting Xen images on SAN but when I researched the market for a SAN-based configuration of our production network (currently 20 Xen hosts hosting about 10 Xen guests each, doing DRBD between pairs of Xen guests and linux-ha for HA), at least one or two of the options I checked mentioned that if I store the Xen images on the SAN then it will require much higher bandwidth to it than if I use it just for plain data. Based on this input, I'd recommend that you'll look at having the images on internal server disks and try to achieve HA at the xen guest level, then compare the performance with iSCSI hosted xen images. Hope this helps. --Amos ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Where to learn Linux?
Hi sammy,
On Mon, Mar 15, 2010 at 10:24:04AM +0200, sammy ominsky wrote:
On 15/03/2010, at 09:53, Jonathan Ben Avraham wrote:
Hi Dov,
Not far off at all from the original question. The first thing that I look
for in an employee or consultant is is he has this feel for the state that
you mention. If the employee has only used Windows or Mac at the GUI level,
then the chance of his understanding the system state is very small because
the visual pane of Windows and Mac that is designed to make things easy
effectively prevents all understanding of the system state.
Honestly, even though I spend many hours a day on the command line of debian
servers, I feel I've ruined myself for linux by delving too far into OS X on
the command line :)
OS X doesn't prevent understanding of the system state at all, it just
doesn't force that understanding. If the desire to delve is present, the
command line offers much deeper system access than the GUI ever could. It's
very different than linux, though.
Someone plugged a USB drive into one of the servers in a data center in the
US, and for the life of me, I couldn't think of anything on a debian system
that would give me a list of all attached disks. On OS X, I'd just type
'diskutil list' (output at the bottom of this email, if anyone's curious).
In the end, dmesg told me where to find the disk, but maybe it's time for
some disk utility on linux that's caught up to the present? cfdisk is great
if you already know what device you want :)
Anyway, back on topic... My company is considering creating a position for a
junior sysadmin, and honestly, I'd much rather have a 20-year old with 6
years of playing with servers in his basement than a freshly-minted RHCP or
whatever.
Anything that does this on linux?
If you have a recent Debian testing (Squeeze), make sure that you have the
package devicekit-disks installed and run:
# devkit-disks --dump
baruch
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Re: Where to learn Linux?
Anyway, back on topic... My company is considering creating a position for a junior sysadmin, and honestly, I'd much rather have a 20-year old with 6 years of playing with servers in his basement than a freshly-minted RHCP or whatever. Well, I've been a desktop user of Fedora and Ubuntu since 2005, but never got too deep into the workings of the system. So it is that depth that I'd like to get into now. I'll go break some things and get back to you! I don't have US key at the moment, but fstab and mstab are two places that I would look for is I wanted to know where the device was mounted. If I just wanted to know that the device was recognised, I'd start with lsusb. -- Dotan Cohen http://bido.com http://what-is-what.com Please CC me if you want to be sure that I read your message. I do not read all list mail. ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Where to learn Linux?
On 14 March 2010 22:52, guy keren c...@actcom.co.il wrote: it's not easy to get a first job, because who in their right mind will let someone with no experience shave on the backs of their poor users? unlike From the constant stream of complaints I see on this mailing list - Israeli ISP's :) --Amos ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Where to learn Linux?
Why aren't mount (with no arguments) or df good enough? Shh! Don't give all the magic secrets away! -- Dotan Cohen http://bido.com http://what-is-what.com Please CC me if you want to be sure that I read your message. I do not read all list mail. ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Where to learn Linux?
Hi Shlomi,
On Mon, Mar 15, 2010 at 10:36:46AM +0200, Shlomi Fish wrote:
On Monday 15 Mar 2010 10:24:04 sammy ominsky wrote:
On 15/03/2010, at 09:53, Jonathan Ben Avraham wrote:
Hi Dov,
Not far off at all from the original question. The first thing that I
look for in an employee or consultant is is he has this feel for the
state that you mention. If the employee has only used Windows or Mac at
the GUI level, then the chance of his understanding the system state is
very small because the visual pane of Windows and Mac that is designed
to make things easy effectively prevents all understanding of the system
state.
Honestly, even though I spend many hours a day on the command line of
debian servers, I feel I've ruined myself for linux by delving too far
into OS X on the command line :)
OS X doesn't prevent understanding of the system state at all, it just
doesn't force that understanding. If the desire to delve is present, the
command line offers much deeper system access than the GUI ever could.
It's very different than linux, though.
Someone plugged a USB drive into one of the servers in a data center in the
US, and for the life of me, I couldn't think of anything on a debian
system that would give me a list of all attached disks. On OS X, I'd just
type 'diskutil list' (output at the bottom of this email, if anyone's
curious). In the end, dmesg told me where to find the disk, but maybe
it's time for some disk utility on linux that's caught up to the present?
cfdisk is great if you already know what device you want :)
Why aren't mount (with no arguments) or df good enough?
I guess the device is not mounted yet.
baruch
--
~. .~ Tk Open Systems
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Re: Where to learn Linux?
On 15/03/2010, at 10:36, Shlomi Fish wrote: maybe it's time for some disk utility on linux that's caught up to the present? cfdisk is great if you already know what device you want :) Why aren't mount (with no arguments) or df good enough? Because they'd show only mounted disks. The USB drive was fresh out of the box and plugged in, no format or mount point. --sambo ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Where to learn Linux?
On Mon, Mar 15, 2010 at 10:47 AM, Amos Shapira amos.shap...@gmail.comwrote: On 14 March 2010 22:52, guy keren c...@actcom.co.il wrote: it's not easy to get a first job, because who in their right mind will let someone with no experience shave on the backs of their poor users? unlike From the constant stream of complaints I see on this mailing list - Israeli ISP's :) snooping around? --Amos ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Where to learn Linux?
Actually, there's another position we may be looking to fill sooner than the jr sysadmin position, or it may be the same position... We need someone to do customer support during Israel business hours. Would need to be someone familiar with and comfortable on the linux command line, willing to learn the asterisk console and our email infrastructure. Prefer someone with some shell scripting ability or perl, php, etc. Among the things we do are VoIP, php development and web hosting for a niche sort of client, and majordomo and mailman mailing lists. Work from home providing support both by phone and e-mail (RT tickets). All client and business communication is in English. We provide a VoIP line and pay for home internet. Salary negotiable, but not high. This is a Jr. level position with potential defined by initiative. We have a history of hiring entry-level people who stay with us for years. We may or may not be ready to hire immediately, i'll have to check. --sambo ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Where to learn Linux?
On 14 March 2010 23:37, Jonathan Ben Avraham y...@tkos.co.il wrote: Hi Dotan, I hire Linux sys-admin's, Linux kernel hacks and Linux developers. The first thing that I look for in a prospective employee is a hobbyist interest in Linux. If a guy shows up in my office with an RFID chipped white rat in his pocket that he keeps track of using a Linux app that he wrote and loaded onto his notebook computer, then he gets a job offer. An RHCE certification doesn't match that. I'm with you here. I also look for people for whom linux is not just a day job. Another dead giveaway is a prospective engineer who shows up with a laptop that runs his own distribution of Linux because he knows all of the standard distros and is not happy with any of them and tells me what is wrong with each of them until I finally have to tell him to shut up. This one could be a problem, though - he'll want to reinvent every wheel in your system instead of taking the approach I take - there is 99.9% chance someone has already found a solution and put it up on the web. Otherwise, I'm with you on the gist of things. Cheers, --Amos ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Where to learn Linux?
On 15 March 2010 20:11, sara fink sara.f...@gmail.com wrote: On Mon, Mar 15, 2010 at 10:47 AM, Amos Shapira amos.shap...@gmail.com wrote: On 14 March 2010 22:52, guy keren c...@actcom.co.il wrote: it's not easy to get a first job, because who in their right mind will let someone with no experience shave on the backs of their poor users? unlike From the constant stream of complaints I see on this mailing list - Israeli ISP's :) snooping around? What do you mean? Me? I'm in Australia now, though I got my workplace interested in looking at hiring an Israeli system administrator in order to have someone watch our 24/7 system on their day time. No need to apply though, I'll probably post something here if it becomes relevant. --Amos ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Ben Gurion - arrivals in Firefox
Does anyone know if there is any web site where one can find out details of arrivals on Ben Gurion airport even with Firefox? http://www.iaa.gov.il/Rashat/he-IL/Airports/BenGurion/informationForTravelers/OnlineFlights.aspx?flightsType=arr has some javascript that immediately hides the details so I need to view source and then search for the text. Trying to search tells me it only works with IE 5.5 and newer! Gabor -- Gabor Szabo http://szabgab.com/ ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Ben Gurion - arrivals in Firefox
Not as accurate, but still works: http://www.flightstats.com/go/FlightStatus/flightStatusByAirport.do?airportCode=TLVairportQueryType=0airportQueryTimePeriod=1sortField=3airlineCode=; On Mon, Mar 15, 2010 at 2:56 PM, Gabor Szabo szab...@gmail.com wrote: Does anyone know if there is any web site where one can find out details of arrivals on Ben Gurion airport even with Firefox? http://www.iaa.gov.il/Rashat/he-IL/Airports/BenGurion/informationForTravelers/OnlineFlights.aspx?flightsType=arr has some javascript that immediately hides the details so I need to view source and then search for the text. Trying to search tells me it only works with IE 5.5 and newer! Gabor -- Gabor Szabo http://szabgab.com/ ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Ben Gurion - arrivals in Firefox
--- On Mon, 3/15/10, Gabor Szabo szab...@gmail.com wrote: From: Gabor Szabo szab...@gmail.com Subject: Ben Gurion - arrivals in Firefox To: linux-il linux-il@cs.huji.ac.il Date: Monday, March 15, 2010, 2:56 PM Does anyone know if there is any web site where one can find out details of arrivals on Ben Gurion airport even with Firefox? http://www.iaa.gov.il/Rashat/he-IL/Airports/BenGurion/informationForTravelers/OnlineFlights.aspx?flightsType=arr has some javascript that immediately hides the details so I need to view source and then search for the text. I do the same. And what's wrong with search in the source ? :) Valery. Trying to search tells me it only works with IE 5.5 and newer! Gabor -- Gabor Szabo http://szabgab.com/ ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Ben Gurion - arrivals in Firefox
This advice is from the Mac community, and can probably be applied to Linux, though I didn't try it myself on either: Install GreaseMonkey and then add the relevant script: http://yehudab.com/blog/2008/11/new-scrpt-iaa/ Quoting Gabor Szabo szab...@gmail.com: Does anyone know if there is any web site where one can find out details of arrivals on Ben Gurion airport even with Firefox? http://www.iaa.gov.il/Rashat/he-IL/Airports/BenGurion/informationForTravelers/OnlineFlights.aspx?flightsType=arr has some javascript that immediately hides the details so I need to view source and then search for the text. Trying to search tells me it only works with IE 5.5 and newer! Gabor -- Gabor Szabo http://szabgab.com/ ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Ben Gurion - arrivals in Firefox
At 14:56:26 on Monday Monday 15 March 2010, Gabor Szabo szab...@gmail.com wrote: Does anyone know if there is any web site where one can find out details of arrivals on Ben Gurion airport even with Firefox? http://www.iaa.gov.il/Rashat/he-IL/Airports/BenGurion/informationForTra velers/OnlineFlights.aspx?flightsType=arr has some javascript that immediately hides the details so I need to view source and then search for the text. Trying to search tells me it only works with IE 5.5 and newer! Gabor Israel is not the 51st state of the American union, it is a subsidiary of Microsoft. Bill Gates won it fair and square years ago, by providing cheap courses for web designers, and then teaching them only M$ gimmicks that real browsers, the developers of which knock themselves out to stick to recognized standards, don't support. And this will get worse before it gets better; already the sick funds and the Airports Authority (i.e. the Government of Israel), which are all supported by taxes and fees paid by all, feel that they need not serve anyone who is not also a Microsoft customer. When this came up recently in connection with the sick funds, I said that the right way to combat this discrimination would be to get a lawyer interested in it. That's what it took to restrict smoking in enclosed public places -- without Amos Hausner, restaurants in Israel would still be obscured by a blue haze. Someplace there is a young lawyer recently out of law school who would jump at the chance to make a name for himself. We need to find him. -- Stan Goodman Qiryat Tiv'on Israel ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Where to learn Linux?
Well, it depends.
State on CLI is not necessarily much more availible.
For example, when looking at a vim window, it is not immediately clear
whether you're at: (1) vim edit mode, (2) vim regular mode (3) selecting
something with screen, where your keyboard are now not even sent to the vim
window.
I think it's more a matter of training. I'm a trained vim user, so I can see
immediately through the subltle hints (cursor shape, etc.) which state am I
in. And nevertheless, I find myself many times typing Ctrl+[ to reset the
state, since it's faster for me to reset the state, than to figure out
whether or not I'm in text mode.
OTOH I use at work the windows environment alot. And I found myself
launching programs with launchy (no state needed here! In CLI I need to
remember where would Ctrl+3 lead me, and whether or not I can exit the
programs there. In windows there's no state, all the apps are Alt+Space
away. Always), using the Winkey+Number to navigate between programs (again,
no state in here, Winkey+3 gives the third app you launched, whereever you
are).
Keyboard friendly programs also gives me a similar stateless feel. For
instance, eclipse has the F12 key to bounce me back to the editor from many
states (and all common states), and have Ctrl+3 to search for a specific
command.
My main problem with GUI interfaces is their relative sluggishness/resource
usage. A similar criticism was directed to emacs when computers were
slower. I hope Moore's law would be able to handle it eventually.
On Mon, Mar 15, 2010 at 9:39 AM, Dov Grobgeld dov.grobg...@gmail.comwrote:
I think it there is something more subtle going on, and that is the concept
of a state. The state is where you are and I feel the big difference
between GUI and command line operation is in the latter, the state is
available without heavy visual interaction. Once you have used the system
enough, you feel the state, and you build a motoric memory for moving from
one state to another. With GUI systems you never reach that proficiency and
you have to do more guess work and more hunt and peck to move from state to
state. It may be easier the first time to use a GUI, but the second and the
third time, you'd be better off typing the command, because it is much more
repeatable.
So the difference between Unix/Linux and Windows in this sense is that in
Unix/Linux you have full control of the system from the command line where
you can have this feeling for where you are.
Anyhow, this is sliding into something that is quite far off from the
original question.
Regards,
Dov
On Mon, Mar 15, 2010 at 08:06, Elazar Leibovich elaz...@gmail.com wrote:
Writing an email without the screen is perfectly doable even within
vanilla windows machine, with nothing installed.
Say, for XP: Windows key - down down - Enter [Now outlook is running] -
Ctrl+n - write email address - Tab Tab Tab - write subject - Tab -
Write Content - Ctrl+Enter.
Not to mention how easier it is when launchy style programs are installed.
And in both systems it is impossible to do that unless you have a fairly
good knowledge of the system (which email client is installed? Should you
type mutt or pine? etc.)
2010/3/14 Dov Grobgeld dov.grobg...@gmail.com
On Sun, Mar 14, 2010 at 14:37, Jonathan Ben Avraham y...@tkos.co.ilwrote:
Even a guy who just shows up with a Dvorak keyboard, no mouse and does
everything inside of EMACS gets an offer.
This more or less describes me, so do I get the job? :-) Also reminds me
of the time a number of years ago when I had turned in my monitor for
repair, and then returned home to my computer without a monitor. Just for
the fun of it and to prove I don't know what, I turned the computer on,
logged in, wrote an email of a page and a half, printed it out to see that I
didn't make too many mistakes which I hadn't and then and sent it off. When
I tell that story to Windows users, they don't even understand what I'm
talking about.
Good luck,
- yba
On Sun, 14 Mar 2010, Dotan Cohen wrote:
Date: Sun, 14 Mar 2010 13:34:04 +0200
From: Dotan Cohen dotanco...@gmail.com
To: linux-il. linux-il@cs.huji.ac.il
Subject: Where to learn Linux?
I have been using Linux as an end user for several years, but now I
think that I might like to make a career out of *nix administration.
Where are some good places to get a certificate from? Is an online
certificate as good as an offline course? What online certificates are
honourable? What real-world courses in Israel are recommended?
Thanks!
--
EE 77 7F 30 4A 64 2E C5 83 5F E7 49 A6 82 29 BA~. .~ Tk Open
Systems
=}ooO--U--Ooo{=
- y...@tkos.co.il - tel: +972.2.679.5364, http://www.tkos.co.il -
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Re: Ben Gurion - arrivals in Firefox
At 14:56:26 on Monday Monday 15 March 2010, Gabor Szabo szab...@gmail.com wrote: Does anyone know if there is any web site where one can find out details of arrivals on Ben Gurion airport even with Firefox? http://www.iaa.gov.il/Rashat/he-IL/Airports/BenGurion/informationForTra velers/OnlineFlights.aspx?flightsType=arr has some javascript that immediately hides the details so I need to view source and then search for the text. Trying to search tells me it only works with IE 5.5 and newer! Gabor Israel is not the 51st state of the American union, it is a subsidiary of Microsoft. Bill Gates won it fair and square years ago, by providing cheap courses for web designers, and then teaching them only M$ gimmicks that real browsers, the developers of which knock themselves out to stick to recognized standards, don't support. And this will get worse before it gets better; already the sick funds and the Airports Authority (i.e. the Government of Israel), which are all supported by taxes and fees paid by all, feel that they need not serve anyone who is not also a Microsoft customer. When this came up recently in connection with the sick funds, I said that the right way to combat this discrimination would be to get a lawyer interested in it. That's what it took to restrict smoking in enclosed public places -- without Amos Hausner, restaurants in Israel would still be obscured by a blue haze. Someplace there is a young lawyer recently out of law school who would jump at the chance to make a name for himself. We need to find him. -- Stan Goodman Qiryat Tiv'on Israel ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Ben Gurion - arrivals in Firefox
On Mon, Mar 15, 2010 at 5:36 PM, Stan Goodman stan.good...@hashkedim.com wrote: At 14:56:26 on Monday Monday 15 March 2010, Gabor Szabo szab...@gmail.com wrote: Does anyone know if there is any web site where one can find out details of arrivals on Ben Gurion airport even with Firefox? http://www.iaa.gov.il/Rashat/he-IL/Airports/BenGurion/informationForTra velers/OnlineFlights.aspx?flightsType=arr has some javascript that immediately hides the details so I need to view source and then search for the text. I actually see a system message saying that the service is unavailable (on both Hebrew and English sites). Try changing all the slashes in the URL after Rashat to backslashes (\he-IL\Airports\...) and see if that helps. It's a bug that has been on this most amazing of websites since forever, and it was discussed on this list a couple of times. If it works, bookmark departures, arrivals, and scheduled flights with backslashes for later use. Of course, they might have improved the site further and even that does not work anymore. -- Oleg Goldshmidt | o...@goldshmidt.org ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Xen and storage
On Mon, Mar 15, 2010 at 10:41 AM, Amos Shapira amos.shap...@gmail.comwrote: 2010/3/12 Hetz Ben Hamo het...@gmail.com: Hi, I have taken 3 machines for a project: 2 machines will act as Xen servers and one machine will act as storage. The storage box is just a machine with few hard disks connected with a RAID controller. What I would like to do is create few Xen VM's with the fastest possible I/O in terms of storage. I have few options: 1. I can create an LVM on the storage machine, create few Logical Volumes and export them as NFS to the Xen servers and configure each VM to some file images. Problem is, that file I/O with Xen is slower compared working with LVM's. 2. I can create an LVM on the storage machine, create few Logical Volumes, and export those as iSCSI devices. I'm not sure whats the performance of Xen with iSCSI devices exported from the storage box. 3. I can create few partitions on the storage machine, export them as iSCSI devices and do LVM on the Xen servers. Problem: I don't know how much the penalty doing LVM on the Xen machines. My question: What is the best option? Thanks, Hetz I don't have practical experience with hosting Xen images on SAN but when I researched the market for a SAN-based configuration of our production network (currently 20 Xen hosts hosting about 10 Xen guests each, doing DRBD between pairs of Xen guests and linux-ha for HA), at least one or two of the options I checked mentioned that if I store the Xen images on the SAN then it will require much higher bandwidth to it than if I use it just for plain data. Why? Where does the secret IO arrive from? Ez Based on this input, I'd recommend that you'll look at having the images on internal server disks and try to achieve HA at the xen guest level, then compare the performance with iSCSI hosted xen images. Hope this helps. --Amos ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: XWindows - how capture window ?
use XDamage extension.
On Sat, Mar 13, 2010 at 1:03 PM, Valery Reznic valery_rez...@yahoo.comwrote:
OK, I found something interesting.
It's turn out that for some reason on-screen rendering is a problem too.
Greatly oversimplified description of my application:
There is a mai windows with 2 buttons ('A', and 'B')
When buttons 'A' pressed Windows 'W' (with a lot of child windows) created
and shown on the screen. It's done with function 'callback_A'
When I press button 'B' I want following to happened:
1. Window 'W created, like it was created, when button 'A' pressed
2. Window 'W content is captured.
So I have callback_B like this:
void callback_B()
{
callback_A(); // create Window 'W'
capture_window();
}
So far so good. The only trouble is that requests sent to XServer in the
function callback_A have no chance to be processed before call to
capture_window() function, because application does not retirned to it's
main application loop, which process events.
To get XServer chance to process events callback_B was modified as
following:
void callback_B()
{
callback_A(); // create Window 'W'
handle_events();
capture_window();
}
Where handle_events looks like:
void handle_events()
{
XFlush(display);
XSync(display, False);
while (XtAppPending(appContext))
{
XtAppProcessEvent(appContext,Mask );
}
}
This functions used in this application in other cases when events should
be handled and it's works OK.
But in this case, Window 'W' was only partially drawn.
I found workaround modifie callback_B
void callback_B()
{
callback_A(); // create Window 'W'
handle_events();
usleep(10);
handle_events();
capture_window();
}
After some sleep and addition handle_events call Window 'W' rendered on
screen as expected.
But I don't why first approach didn't work.
From the XSync man page:
-
The XSync function flushes the output buffer and then waits until all
requests have been received and processed by the X server. Any
errors
generated must be handled by the error handler. For each protocol
error received by Xlib, XSync calls the client application’s error
han-
dling routine (see section 11.8.2). Any events generated by the
server
are enqueued into the library’s event queue.
---
So it's looks like XSync alone should do the job.
Obviously it was not - and it was a reason, that event_handle function was
written.
What I did with sleep and two calls to even_handle is work, but it's ugly.
Anyone has idea why XSync alone is not enough and how I can wait to all
requests to be processed by XServer ?
Regards,
Valery.
--- On Sun, 3/7/10, Nadav Har'El n...@math.technion.ac.il wrote:
From: Nadav Har'El n...@math.technion.ac.il
Subject: Re: XWindows - how capture window ?
To: Erez D erez0...@gmail.com
Cc: Valery Reznic valery_rez...@yahoo.com, linux-il.
linux-il@cs.huji.ac.il
Date: Sunday, March 7, 2010, 10:38 AM
On Thu, Mar 04, 2010, Erez D wrote
about Re: XWindows - how capture window ?:
composite window managers (i.e. compiz, baryl) work by
drawing the original
window off screen, then read it as a 2D picture, and
render it back to the
screen with certain effects.
So i know it is possible to grab an off screen window.
I do not know however
how to make it off screen.
This is done using the Composite extension. See
http://www.freedesktop.org/wiki/Software/CompositeExt
But please note that all these extensions, as their title
implies, are
not available in every installation of X. The right way
to use them is
to use them when they're available, but fall back to some
slower or uglier
alternative when they aren't.
There is an X Extension called XDamage, which reports
changes on the window
so you do not have to poll it for changes. These
window managers use it.
Right. http://www.freedesktop.org/wiki/Software/XDamage
--
Nadav Har'El
|
Sunday, Mar 7 2010, 21 Adar 5770
n...@math.technion.ac.il
|-
Phone +972-523-790466, ICQ 13349191 |Business jargon is the
art of saying
http://nadav.harel.org.il
|nothing while appearing to say a lot.
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Re: Xen and storage
2010/3/16 Etzion Bar-Noy eza...@tournament.org.il: On Mon, Mar 15, 2010 at 10:41 AM, Amos Shapira amos.shap...@gmail.com wrote: 2010/3/12 Hetz Ben Hamo het...@gmail.com: Hi, I have taken 3 machines for a project: 2 machines will act as Xen servers and one machine will act as storage. The storage box is just a machine with few hard disks connected with a RAID controller. What I would like to do is create few Xen VM's with the fastest possible I/O in terms of storage. I have few options: 1. I can create an LVM on the storage machine, create few Logical Volumes and export them as NFS to the Xen servers and configure each VM to some file images. Problem is, that file I/O with Xen is slower compared working with LVM's. 2. I can create an LVM on the storage machine, create few Logical Volumes, and export those as iSCSI devices. I'm not sure whats the performance of Xen with iSCSI devices exported from the storage box. 3. I can create few partitions on the storage machine, export them as iSCSI devices and do LVM on the Xen servers. Problem: I don't know how much the penalty doing LVM on the Xen machines. My question: What is the best option? Thanks, Hetz I don't have practical experience with hosting Xen images on SAN but when I researched the market for a SAN-based configuration of our production network (currently 20 Xen hosts hosting about 10 Xen guests each, doing DRBD between pairs of Xen guests and linux-ha for HA), at least one or two of the options I checked mentioned that if I store the Xen images on the SAN then it will require much higher bandwidth to it than if I use it just for plain data. Why? Where does the secret IO arrive from? I haven't dug into this but I figured it was around reading the program files from the storage to the iSCSI client which actually runs the Xen image and storing the Xen guest's state if you use xen's suspend to disk stuff. --Amos ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Xen and storage
Assuming your farm is a production one, suspend to disk is rather rare, and by design, would probably not be a day-to-day process of the system. Anyhow - suspend to disk is an operation which is being performed on NFS SR as well, just the same (create file which contains memory dump of the VM). NFS has other advantages, like LUN alignment and thin provisioning (assuming you did not purchase the foundation for Citrix XenServer package). Also - for real-life production systems I have seen that network communication over iSCSI, for about 50 VMs on 5 physical servers would not exceed the 200Mb/s at peak times. Of course - specific applications can (and will) stress the storage and network, however, many common storage devices cannot maintain a high rate of random IO (common to DBs, like Oracle, MySQL, Exchange, MSSQL, etc). The disks would commonly be the bottleneck, and not the network/FCS transport. Don't believe me? Check your virtual farm. See what throughput you get for your DRBD/central storage links. Ez On Mon, Mar 15, 2010 at 10:58 PM, Amos Shapira amos.shap...@gmail.comwrote: 2010/3/16 Etzion Bar-Noy eza...@tournament.org.il: On Mon, Mar 15, 2010 at 10:41 AM, Amos Shapira amos.shap...@gmail.com wrote: 2010/3/12 Hetz Ben Hamo het...@gmail.com: Hi, I have taken 3 machines for a project: 2 machines will act as Xen servers and one machine will act as storage. The storage box is just a machine with few hard disks connected with a RAID controller. What I would like to do is create few Xen VM's with the fastest possible I/O in terms of storage. I have few options: 1. I can create an LVM on the storage machine, create few Logical Volumes and export them as NFS to the Xen servers and configure each VM to some file images. Problem is, that file I/O with Xen is slower compared working with LVM's. 2. I can create an LVM on the storage machine, create few Logical Volumes, and export those as iSCSI devices. I'm not sure whats the performance of Xen with iSCSI devices exported from the storage box. 3. I can create few partitions on the storage machine, export them as iSCSI devices and do LVM on the Xen servers. Problem: I don't know how much the penalty doing LVM on the Xen machines. My question: What is the best option? Thanks, Hetz I don't have practical experience with hosting Xen images on SAN but when I researched the market for a SAN-based configuration of our production network (currently 20 Xen hosts hosting about 10 Xen guests each, doing DRBD between pairs of Xen guests and linux-ha for HA), at least one or two of the options I checked mentioned that if I store the Xen images on the SAN then it will require much higher bandwidth to it than if I use it just for plain data. Why? Where does the secret IO arrive from? I haven't dug into this but I figured it was around reading the program files from the storage to the iSCSI client which actually runs the Xen image and storing the Xen guest's state if you use xen's suspend to disk stuff. --Amos ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Ben Gurion - arrivals in Firefox
On Mon, Mar 15, 2010 at 06:38:43PM +0200, Oleg Goldshmidt wrote: On Mon, Mar 15, 2010 at 5:36 PM, Stan Goodman stan.good...@hashkedim.com wrote: At 14:56:26 on Monday Monday 15 March 2010, Gabor Szabo szab...@gmail.com wrote: Does anyone know if there is any web site where one can find out details of arrivals on Ben Gurion airport even with Firefox? http://www.iaa.gov.il/Rashat/he-IL/Airports/BenGurion/informationForTra velers/OnlineFlights.aspx?flightsType=arr has some javascript that immediately hides the details so I need to view source and then search for the text. I actually see a system message saying that the service is unavailable (on both Hebrew and English sites). Try changing all the slashes in the URL after Rashat to backslashes (\he-IL\Airports\...) and see if that helps. It's a bug that has been on this most amazing of websites since forever, and it was discussed on this list a couple of times. If it works, bookmark departures, arrivals, and scheduled flights with backslashes for later use. Of course, they might have improved the site further and even that does not work anymore. -- Oleg Goldshmidt | o...@goldshmidt.org ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il Hi, Apparently they did improve. Trying Oleg's advice I got Wrong/Not supported browser (or something like that). The only way around it I found was to download the page and read it with w3m: w3m -I UTF8 Desktop/OnlineFlightsTemplate.aspx.html Cheers, Avraham -- Please avoid sending to this address Excell or Powerpoint attachments. ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
