On 05/03/2010 07:03 AM, Dave Wright wrote:
I've got a situation where I essentially need dynamic cluster
membership, which has been talked about in ZOOKEEPER-107 but doesn't
look like it's going to happen any time soon.
Could you provide some insight into why you need this? Just so we have
. For example high max latency
might indicate that something (usually swap/gc) is causing the server to
respond slowly in some cases.
Patrick
On 04/28/2010 10:47 PM, Patrick Hunt wrote:
Hi Aaron, some questions/comments below:
On 04/28/2010 06:29 PM, Aaron Crow wrote:
We were running version 3.2.2
I believe Lei's concern is that the leader and all slaves can talk to
ZK, but the slaves cannot talk to the leader. As a result no work can be
done. However nothing will happen on the ZK side since everyone is
heartbeating properly.
Mahadev I think you came up with a pretty good solution.
Hi Chen, this section of the docs has details on our guarantees, in
particular see the note:
http://hadoop.apache.org/zookeeper/docs/current/zookeeperProgrammers.html#ch_zkGuarantees
Patrick
On 04/29/2010 07:42 AM, Flavio Junqueira wrote:
Hi Chen, Let's say that the value of a znode /test is
Is there any good (simple/fast/bulletproof) way to monitor the FD use
inside the jvm? If so we could stop accepting new client connections
once we get close to the os imposed limit... The test would have to be a
bulletproof one though - we wouldn't want to end up in some worse
situation (where
Ted, this is my browser homepage ;-)
http://en.wikipedia.org/wiki/Fallacies_of_Distributed_Computing
Patrick
On 04/29/2010 09:14 AM, Ted Dunning wrote:
In general, the guarantee is that B will do exactly as you say it will
read the new value or the old value. Your question depends on a
On 04/29/2010 11:22 AM, Chad Harrington wrote:
On Thu, Apr 29, 2010 at 8:49 AM, Patrick Huntph...@apache.org wrote:
This is not foolproof however. We found that in general this would work,
however there were some infrequent cases where a restarted server would fail
to initialize due to the
Hi Adam, would you mind creating a JIRA? That's the best way to address
this type of issue. Thanks!
https://issues.apache.org/jira/browse/ZOOKEEPER
Patrick
On 04/22/2010 11:30 AM, Adam Rosien wrote:
http://hadoop.apache.org/zookeeper/docs/r3.3.0/recipes.html#sc_recoverableSharedLocks
uses the
No problem.
https://issues.apache.org/jira/browse/ZOOKEEPER-752
I've seen alot of traffic on infrastruct...@apache, you might try there,
I'm sure they could help you out.
Regards,
Patrick
On 04/22/2010 01:26 PM, Adam Rosien wrote:
I would, but the Apache JIRA has been f***ed since the
Hi Julien,
take a look at the FAQ for some background:
http://wiki.apache.org/hadoop/ZooKeeper/FAQ#A3
Basically when your client connects to the server it provides a
timeout value. If the server doesn't hear from your client within this
timeout period (we do heartbeating for you in a
There are a small handful of cases where the server code will
system.exit. This is typically only if quorum communication fails in
some weird, unrecoverable way. We've been working to remove this (mainly
so zk can be deployed in a container) but there are still a few cases left.
I don't see
Usually the server logs will shed light on such issues. If we had access
to them it might be easier to speculate.
Patrick
On 04/19/2010 09:22 AM, Mahadev Konar wrote:
Hi Hao,
As Vishal already asked, how are you determining if the writes are being
received?
Also, what was the status of
Hi Kevin,
The server increments a znode's cversion by one each time a change to
it's child list is made. Every znode has it's own cversion. It should
never decrease. If you delete a znode and create it a new then the
cversion is reset for that znode. The cversion also happens to be used
for
See this environment http://bit.ly/4ekN8G. Subsequently I used the 3
server setup, each configured with 8gig of heap in the jvm and 4
CPUs/jvm (I think I used 10second session timeouts for this) for some
additional testing that I've not written up yet. I was able to run ~500
clients (same test
We did have a case where the user setup 3 servers, each was standalone.
:-) Doesn't look like that's the problem here though given you only
specify 1 server in the connect string (although as mahadev mentioned
you don't need to worry about that aspect).
After it goes 7-11-9, does it ever go
On 04/12/2010 03:58 PM, Kevin Webb wrote:
On Mon, 12 Apr 2010 15:09:20 -0700
Patrick Huntph...@apache.org wrote:
We did have a case where the user setup 3 servers, each was
standalone. :-) Doesn't look like that's the problem here though
given you only specify 1 server in the connect string
Probably reaching for straws but could you print path, just to confirm
it's what you know it is?
Patrick
On 04/12/2010 02:53 PM, Kevin Webb wrote:
On Mon, 12 Apr 2010 14:33:44 -0700
Mahadev Konarmaha...@yahoo-inc.com wrote:
Hi Kevin,
Thanks for the info. Could you cut and paste the code
That is weird. Ben tried with 1.7 as part of the release and it was
fine. Looks like this issue has happened to others, but this wasn't very
recent:
http://cygwin.com/ml/cygwin/2009-05/msg00063.html
Perhaps you can try upgrading your cygwin install to the latest (ensure
you have the latest)
Are you running cygwin 1.7 or 1.5? I believe there was a change btw
versions of cygwin on how pthreads was supported.
Patrick
On 04/07/2010 03:08 AM, zd.wbh wrote:
hi, all:
Is it possible to build an mt version of zookeeper dll lib? I've
tried, cygzookeeper_st-2.dll come out successfully,
when you run configure what does it say for pthreads?
My cygwin says this:
checking for pthread_mutex_lock in -lpthread... yes
Do you have pthreads libs in /usr/lib?
I see:
$ ls /usr/lib/*pth*
/usr/lib/libpthread.a*
You could also try running configure and the build, capture all the
output
Hi Li, when you say 17 threads reading a znode, do you mean that you
have 17 threads each creating a session and using that session to read a
znode? If so it's probably due to this:
http://hadoop.apache.org/zookeeper/docs/current/zookeeperAdmin.html#sc_advancedConfiguration
see the parameter
Take a look at the logging page in the docs:
http://hadoop.apache.org/zookeeper/docs/current/zookeeperInternals.html#sc_logging
Some good guidelines in there. Basically we log things at info level
that are interesting/informational but not logged so frequently that
they fill the log. WARN is
The Apache ZooKeeper team is proud to announce Apache ZooKeeper version
3.3.0.
ZooKeeper is a high-performance coordination service for distributed
applications. It exposes common services - such as naming, configuration
management, synchronization, and group services - in a simple interface
:39, Patrick Hunt ph...@apache.org wrote:
Yea, that's great. (no complaints on my end, just wasn't sure what you
meant, wanted to make sure I was clear.).
Can you identify some sort of pattern? We're discussing on our end, but this
is the first time we've heard of such an issue (outside 3.2.0 bug
, Łukasz
On Tue, Mar 16, 2010 at 20:39, Patrick Hunt ph...@apache.org wrote:
Yea, that's great. (no complaints on my end, just wasn't sure what you
meant, wanted to make sure I was clear.).
Can you identify some sort of pattern? We're discussing on our end, but this
is the first time we've heard
Can you verify that you are using 3.2.2 on all servers? You can do this
by running the stat command against each of your servers and look at
the very top of the output (we include the version of zk server there).
http://bit.ly/dglVld
Are you using synchronous or async operations in your
after reconnect, what's the second
part saying?)
Regards,
Patrick
Łukasz Osipiuk wrote:
On Tue, Mar 16, 2010 at 19:22, Patrick Hunt ph...@apache.org wrote:
Łukasz Osipiuk wrote:
On Tue, Mar 16, 2010 at 17:18, Patrick Hunt ph...@apache.org wrote:
Can you verify that you are using 3.2.2 on all
] - FOLLOWING
Additionally if you use the stat 4letter word you will see the current
status of the server, leader or follower. (JMX as well)
You might also find this useful: http://github.com/phunt/zktop
Patrick
Łukasz Osipiuk wrote:
On Tue, Mar 16, 2010 at 20:05, Patrick Hunt ph...@apache.org wrote
Agree.
Patrick
Ted Dunning wrote:
This is very different from most uses of ZK. Normally Zookeeper is used on
a private network with almost no packet loss. Your high rate of loss may be
tickling a protocol bug that other people
just never see.
On Tue, Mar 16, 2010 at 12:24 PM, Łukasz Osipiuk
. (rather than trying to restart
the client as you have been doing).
Not sure if you can try this (production env?) but it would be an
interesting additional data point if you can give it a try.
Regards,
Patrick
Patrick Hunt wrote:
Yes, if you search back (older entries) in the server log you
I'm afraid the docs are wrong, it's being fixed in 3.3.0:
https://issues.apache.org/jira/browse/ZOOKEEPER-681
set the value to 0 if you want unlimited.
Patrick
Michael Bauland wrote:
Hi,
I've got another question regarding the connection limit. I sometimes
get the following warning in my
Michael Bauland wrote:
- When I connect with a client to the Zookeeper ensemble I provide the
three IP addresses of my three Zookeeper servers. Does the client then
choose one of them arbitrarily or will it always try to connect to the
first one first? I'm asking since I would like to have my
IMO latency is the primary issue you will face, but also keep in mind
reliability w/in a colo.
Say you have 3 colos (obv can't be 2), if you only have 3 servers, one
in each colo, you will be reliable but clients w/in each colo will have
to connect to a remote colo if the local fails. You
See the troubleshooting page, some apropos detail there (esp relative to
virtual env).
http://wiki.apache.org/hadoop/ZooKeeper/Troubleshooting
ZK servers are sensitive to IO (disk/network) latency. As long as you
aren't very sensitive latency requirements it should be fine. If the
machine
be resumed when the link reappears.
I need to get this running in the lab and start pulling out wires.
regards,
Martin
On 8 March 2010 17:39, Patrick Hunt ph...@apache.org wrote:
IMO latency is the primary issue you will face, but also keep in mind
reliability w/in a colo.
Say you have 3 colos
re previous discussion see this thread:
http://www.mail-archive.com/zookeeper-user@hadoop.apache.org/msg00916.html
Patrick
Nick Dimiduk wrote:
I think automating this assignment has been discussed in the past. IIRC,
some combination of MAC address and pid or timestamp would be sufficient to
This is def. something we should add to the recipes (docs code lib),
Henry/David can you create a jira for this?
Patrick
Henry Robinson wrote:
Just to illustrate one of the primitives you're looking for: an
AtomicInteger equivalent would be fairly easy to construct, with nearly
identical
on the locks directory to make the wait as long as possible
AND as short as possible.
On Wed, Feb 24, 2010 at 8:53 AM, Patrick Hunt ph...@apache.org wrote:
Anyone interested in locking an explicit resource attempts to create an
ephemeral node in /locks with the same ### as they resource they want
access
Stack you might look at the following:
1) why does server 14 have such a low recv count?
Received: 194
while the other servers are at 3.7k + received. Did server 14 fail at
some point? Or it's network? This may have caused the timeout seen by
the client:
--snippet-
Wow, this is impressive. I haven't gotten a chance to try it yet but it
looks great. Thanks Mark!
If you are interested to have it included in the official ZooKeeper
release please submit a patch for contrib. It would be great to get this
included and pushed out to users as part of a release.
Mahadev can you put a link to that up on the wiki?
Patrick
Mahadev Konar wrote:
Hi Kay,
There is a paper
Brief Announcement Zab A Practical Totally Ordered Broadcast Protocol. in
DISC 2009
By ben and flavio which has the details of zab in it.
Thanks
mahadev
On 2/18/10 6:07 PM, Kay Kay
Thomas, I've looked at integrating the two, so far as to download the
gearman source and examine it a bit. I didn't see a huge near-term win
implementing a plugin as gearman already has support for
drizzle/memcached/sqlite4/pq. While ZK could be used to provide highly
reliable/available
Here's one that I know of that's open - LinkedIn's Norbert
http://wiki.github.com/rhavyn/norbert/
Patrick
neptune wrote:
Thanks for your quick answer.
I will make cluster member ship service using zookeeper.
If a node in a cluster can't connect to zookeeper cluster, the node killed
by oneself
this? How should I handle SESSION_EXPIRED?
http://wiki.apache.org/hadoop/ZooKeeper/FAQ#A3
Benjamin Reed wrote:
i was looking through the docs to see if we talk about handling session
expired, but i couldn't find anything. we should probably open a jira to add to
the docs, unless i missed
for more the the session
timeout ...
That's why I use Expired event for cluster membership. In my case client is
a node in a cluster.
2010/2/9 Patrick Hunt ph...@apache.org
this? How should I handle SESSION_EXPIRED?
http://wiki.apache.org/hadoop/ZooKeeper/FAQ#A3
Benjamin Reed wrote:
i
the ZooKeeper service for more the the session
timeout ...
That's why I use Expired event for cluster membership. In my case client is
a node in a cluster.
2010/2/9 Patrick Hunt ph...@apache.org
this? How should I handle SESSION_EXPIRED?
http://wiki.apache.org/hadoop/ZooKeeper/FAQ#A3
Benjamin Reed
While this is a very useful improvement it sounds to me like the prudent
thing to do given the short time to 3.3.0. If you want we can shoot for
3.4.0 soon after 3.3.0 goes out (with 22 as one of the primary features).
Patrick
Mahadev Konar wrote:
Hi all,
I had been working on zookeeper-22
You should never see connection loss except in the case where you have
some network partition or some other issue that causes communication
issues btw the client and server. (client swapping? server swapping or
either having GC pause issues? etc...) Are you monitoring your
hosts/network/jvms,
This is zk 3.2.2? Are you sure that's all it said on start? When I start
I see:
$ bin/zkServer.sh start
JMX enabled by default
Using config: /home/phunt/dev/workspace/gitzk/bin/../conf/zoo.cfg
Starting zookeeper ...
STARTED
you might have some error case, for example if I start zk w/o having a
GC and disk IO (transactional log in particular) will cause significant
latency in some cases. See this for details on the types of things you
should look at:
http://wiki.apache.org/hadoop/ZooKeeper/Troubleshooting
I've seen cases where the JVM will pause for 2+ minutes for GC, in some
cases
Rename phunt-zookeeper_dashboard-43ce91a to zookeeper_dashboard (or
change the django files inside phunt-zookeeper_dashboard-43ce91a to use
this as the module name)
Patrick
Eric Scheie wrote:
I am having trouble getting the ZooKeeper Dashboard up and running.
I installed Django-1.1.1 and
(myid is 2) and we
started it around 10:03:21
Thx!
J-D
On Mon, Jan 25, 2010 at 10:49 AM, Patrick Hunt ph...@apache.org wrote:
1) Capture the logs from all 5 servers
2) give the config for the down server, also indicate that it's server id
is.
3) if possible it would be interesting to see
JD, there's something _very_ unusual in your setup. Are you running
official released ZooKeeper code or something else?
Either there is a misconfiguration on the other servers (the configs for
the other servers is exactly the same as 222 right?), or perhaps some
patches to ZK codebase that
experience. Lots of times
that bad user experience is somewhat covered up by your load balancer and
other general redundancy to you may notice it first from ZK forcing you to
think about these things.
On Mon, Jan 25, 2010 at 9:43 AM, Patrick Hunt ph...@apache.org wrote:
GC and disk IO (transactional
any of
these and analyze them just let me know.
Thanks for the help, Nick Bailey
On Jan 12, 2010, at 8:20 PM, Patrick Hunt
ph...@apache.org wrote:
Nick Bailey wrote:
In my last email I failded to include a log line that
may be revelent as well 2010-01-12 18:33:10,658
[QuorumPeer:/0.0.0.0:2181
Btw, here's an excellent example of these 4letterwords being used in a
monitoring application ;-) zktop - http://bit.ly/1iMZdg
Patrick
Patrick Hunt wrote:
ruok basically is polling to see if the ZK process is ok, which it is,
it's just that zk is not part of a quorum (which is potentially
Mekaraj, Prashant wrote:
Hi,
http://hadoop.apache.org/zookeeper/docs/current/zookeeperAdmin.html
is a great resource. It's rare to see a open source project think so
much about practical enterprise deployment and this is much
appreciated.
Thanks!
There are a few more recommendations that
12 servers? That's alot, if you dont' mind my asking why so many?
Typically we recommend 5 - that way you can have one down for
maintenance and still have a failure that doesn't bring down the cluster.
The electing a leader is probably the restarted machine attempting to
re-join the ensemble
.
-Original Message-
From: Patrick Hunt ph...@apache.org
Sent: Tuesday, January 12, 2010 5:40pm
To: zookeeper-user@hadoop.apache.org, nicholas.bai...@rackspace.com
Subject: Re: Killing a zookeeper server
12 servers? That's alot, if you dont' mind my asking why so many?
Typically we recommend 5
Adam, this is awesome! I've retweeted it on my twitter account:
http://twitter.com/phunt/status/7637054275
A few comments:
1) you are correct about the off the shelf part, but really alot of
that is our marketing blurb, we paint with a broad stroke. I think it
would make sense to include this
The primary reason is testing. Secondly there just hasn't been much (any
really) interest in win32 for production, it's not used on that platform
and confidence is low as a result. We'd need to find one or more
users/developers that are interested in testing and fixing any issues
found on
Thiago Borges wrote:
I read the documentation at zoo site and can't find some text about
sharing/limits of zoo clients connections.
No limits in particular to ZK itself (given enough memory) - usually the
limitations are due to the max number of file descriptors the host OS
allows. Often
See this recent benchmark I did: http://bit.ly/4ekN8G
In this case I have 20 clients doing 10k zodes each (200k znodes of size
100 bytes each with 1million watches). However I have tested similar
setup with 400 clients (so 4 million znodes and 20million watches).
As Ben mentioned there are
The Apache ZooKeeper team is proud to announce Apache ZooKeeper version
3.1.2.
ZooKeeper is a high-performance coordination service for distributed
applications. It exposes common services - such as naming, configuration
management, synchronization, and group services - in a simple interface
The Apache ZooKeeper team is proud to announce Apache ZooKeeper version
3.2.2.
ZooKeeper is a high-performance coordination service for distributed
applications. It exposes common services - such as naming, configuration
management, synchronization, and group services - in a simple interface
Btw, the docs for a particular version of ZK are always included in the
release (under docs toplevel directory). The docs on the apache site are
always for the latest stable release (currently 3.2.1). That's why you
saw the discrepancy.
Patrick
Something Something wrote:
Switched to 3.2.1.
One thing missing from the list is that you need to have myid files on
each server that correspond to the servers id (specified in the conf file).
http://hadoop.apache.org/zookeeper/docs/current/zookeeperAdmin.html#sc_zkMulitServerSetup
You'd have a config on each system that looks something
Would you be willing to create a zk on ec2 page on the wiki?
http://wiki.apache.org/hadoop/ZooKeeper/ZooKeeperOnEC2
Not sure on the exactly content -- basically outline what you did to get
ZK running. Something you think would be helpful to other users trying
to deploy ZK on ec2 for the first
I pinged hadoop general@ a few months ago and got lukewarm reception
(generally having multiple logger backends sux). But no one really
seemed too interested one way or the other: http://bit.ly/71M6tK
I'm not sure if anyone is thinking about this wrt hadoop as a whole...
For example, what's
Hi Alan, turns out there were a number of issues with the scripts on
cygwin, see the patch attached to the JIRA that will be applied to 3.3.0.
https://issues.apache.org/jira/browse/ZOOKEEPER-606
See the tar attached to this email, give these scripts a try (replace
your entire bin directory with
We don't use xerces, perhaps it's picking up your default classpath?
Try unsetting your default classpath and try that again.
unset CLASSPATH
or (the following should also work I think)
CLASSPATH= bin/zkServer.sh start
Patrick
Ratner, Alan S (IS) wrote:
I have been unsuccessful at getting
Yes, that was my thinking as well - something like configure does
(autotools) where it will tell you some details after calling it
(although in this case the output is after install).
Sounds good!
Patrick
Mahadev Konar wrote:
I would suggest adding it to the readme no? Modifying /etc files
on checking the
static flag for g++ in configure in 3.2.1
Weird.
Maarten Koopmans schreef:
I applied the patch to the trunk, but somehow autoconf fails on the
fresh checkout (or my brain fails me, more likely ;-)
What do you do on checkout to get a build of the trunk?
--Maarten
Patrick Hunt
stack wrote:
I want to ask a running zk cluster what its configuration is -- ticktime,
session timeout, etc. -- but do not see how. There are the four letter
words. Dump and stat do not print what I want. I took a look in logs --
the leader in particular -- and do not see vitals dumped out.
stack wrote:
On Tue, Nov 24, 2009 at 1:33 PM, Patrick Hunt ph...@apache.org wrote:
We can definitely add this, please create a JIRA.
ZOOKEEPER-595
Great, thanks!
I was also wondering what this expire stuff in the dump output is about?
Those are the expiration sets, or buckets. Each
See attached - Hadoop India User Group meet up on 28th November 2009 in
Noida, India. Aby Abraham will be presenting on ZooKeeper.
Patrick
---BeginMessage---
Here is the updated agenda for Hadoop India User Group meet up on 28th November
2009 in Noida-
- Introductions
- Sessions-
-
Config management and group membership are two of the simplest use cases
for ZK, we don't have a recipe here as it's pretty basic (not that we
couldn't/shouldn't)
The java example in our docs is pretty close, it sets a watch on a node
and monitors for changes. This is the typical pattern for
fyi, this patch allows compilation under cygwin but the tests are
currently not passing (probably not handling the space in windows
directory names correctly, but haven't had a chance to track it down).
This should go into 3.3.0
https://issues.apache.org/jira/browse/ZOOKEEPER-586
Maarten
tomorrow.
--Maarten
Op 23 nov 2009 om 18:38 heeft Patrick Hunt ph...@apache.org het
volgende geschreven:\
fyi, this patch allows compilation under cygwin but the tests are
currently not passing (probably not handling the space in windows
directory names correctly, but haven't had a chance to track
What version of ZooKeeper is this? If it's 3.2.1 take a look at this:
binding fixes in 3.2.2
https://issues.apache.org/jira/secure/IssueNavigator.jspa?reset=truepid=12310801component=12312860fixfor=12314335resolution=1sorter/field=prioritysorter/order=DESC
You might give the 3.2 branch (in svn)
Maarten, I just tried this with cygwin and it fails for me too. It seems
that cygwin does not support getaddrinfo! Please create a JIRA and I'll
see what we can do.
Patrick
Maarten Koopmans wrote:
Hi,
Has anybody managed to get the c client / dll compiled on Win32, and if
so, how? I did a
citizen. Besides, I think we might wnat to try with the beta of Cygwin
first before filing it in Jira.
Ultimately the goal (IMHO) should be MinGW support(?)
--Maarten
Patrick Hunt schreef:
Maarten, I just tried this with cygwin and it fails for me too. It
seems that cygwin does not support
function pointers).
If I can get ZooKeeper talking via C (or via TCP, but the protocol
doesn't seem to be specified) from REBOL, I have some very cool things
coming. But maybe we should talk off-list aboutt that (will be open
sourced though).
--Maarten
Patrick Hunt schreef:
Well I can tell you
Oops too late. ;-)
I'm perplexed as to why you see all these expirations though. Are you
killing your clients, ie not cleaning up the ZK session gracefully via
close()?
Patrick
stack wrote:
Please disregard. Sorry for the noise (Patrick, of note, I am seeing this
session timeout on a
I'm really psyched to see this go into the 3.3 code line, kudos to Henry
and the rest of the team in getting this landed!
Patrick
ps. gentle reminder - the user list is primarily for answering user
questions on released software, many users don't follow future
developments and can be
Tomorrow is the BA HUG, if anyone is interested to talk with Mahadev or
I f2f regarding ZooKeeper we'll both be in attendance.
Patrick
---BeginMessage---
Hi all,
We are one week away from the next Bay Area Hadoop User Group - Yahoo!
Sunnyvale Campus, next Wednesday (Nov 18th) at 6PM
We have
We've found an issue with the migration tool used to migrate users from
version 2 of ZooKeeper to version 3. This tool was provided to users who
upgraded from the SourceForge v2 ZK, after we moved to being a
subproject of Apache Hadoop (which is the same time that we incremented
the version
and I'll report back...
David
2009/11/10 Patrick Hunt ph...@apache.org
I couldn't find a JIRA for removing the sys exits so I created one:
https://issues.apache.org/jira/browse/ZOOKEEPER-575
there's also this which seems like it should be easy for someone
who knows osgi container jar format
is generally about what you saw. We have been able
to sustain 20-30MB/s into EC2 to a single node which should be harder than
moving data between nodes. I have heard rumors that others were able to get
double what I got for incoming transfer.
On Mon, Nov 9, 2009 at 9:47 PM, Patrick Hunt ph...@apache.org
that we blamed EC2 for
some of our own GC misconfiguration.
I would not use our configuration here as canonical since we didn't apply a
whole lot of brainpower to this problem.
On Tue, Nov 10, 2009 at 9:29 AM, Patrick Hunt ph...@apache.org wrote:
Ted, could you provide your configuration information
Ben has been looking at using netty instead of our own direct NIO code.
My understanding is that it supports the encryption/auth between
servers, but I'm not 100% on that -- Ben, can you elaborate?
Patrick
Gustavo Niemeyer wrote:
Dear ZooKeepers,
I'm quite interested in the features related
I couldn't find a JIRA for removing the sys exits so I created one:
https://issues.apache.org/jira/browse/ZOOKEEPER-575
there's also this which seems like it should be easy for someone
who knows osgi container jar format requirements:
https://issues.apache.org/jira/browse/ZOOKEEPER-425
Now we
I'm really interested to know how ec2 compares wrt disk and network
performance to what I've documented here under the hardware section:
http://wiki.apache.org/hadoop/ZooKeeper/ServiceLatencyOverview#Hardware
Is it possible for someone to compare the network and disk performance
(scp, dd,
-mumble:~#
On Mon, Nov 9, 2009 at 4:54 PM, Patrick Hunt ph...@apache.org wrote:
I'm really interested to know how ec2 compares wrt disk and network
performance to what I've documented here under the hardware section:
http://wiki.apache.org/hadoop/ZooKeeper/ServiceLatencyOverview#Hardware
Some users have asked what performance one should expect from a ZK
cluster based on number of cores, client load, disk performance, etc...
I put together the following survey that looks at performance on
hardware with varying core counts using a shared 7200RPM disk. Many of
our users don't
on a few other ports as well and it's giving me the same issue. Do I need to tamper with port permissions?
-Original Message-
From: Patrick Hunt [mailto:ph...@apache.org]
Sent: Friday, October 23, 2009 1:23 AM
To: zookeeper-user@hadoop.apache.org; Mark Vigeant
Subject: Re: Cluster Configuration
Great to hear. Good luck.
Patrick
Mark Vigeant wrote:
Oh awesome! Thanks Patrick!
Everything works now. Thanks a lot everyone for all your help!
-Mark
-Original Message-
From: Patrick Hunt [mailto:ph...@apache.org]
Sent: Friday, October 23, 2009 11:58 AM
To: Mark Vigeant
Cc
I've created a ZooKeeper Dashboard using Django and the zkpython
bindings, it's available on github: http://bit.ly/1kjQy0
It currently provides some basic information about the ensemble:
* Cluster summary
* Individual server detail
* Client connection detail
* Navigate examine
guys for all of your immediate help!
My machines are currently down for other reasons so I'll be able to try things
again, send out the errors I'm getting and such in a day or so (hopefully!)
thanks again!
-Mark
-Original Message-
From: Patrick Hunt [mailto:ph...@apache.org]
Sent
bummer, donno what to say, what version of python are you using? works
for me in 2.5 and 2.6 (linux jaunty)
$ ls
LICENSE.txt README.html start.py start.pyc stop.py
stop.pyc test3 zoocfg.py zoocfg.pyc
ptestREADME.textile start.py.bak start.tmpl stop.py.bak
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