On 17 February 2011 00:56, Eric Evans eev...@rackspace.com wrote:
CASSANDRA-2165[1] became evident almost as soon as 0.7.1 released, and
it's ugly enough that we didn't want to wait.
Be sure you've read the changelog[2] and release notes[3], and let us
know[4] if you encounter any problems.
raise EOFError()
EOFError
[snip]
error: [Errno 104] Connection reset by peer
Sounds like you either have a firewalling/networking issues that is
tearing down TCP connections, or your cassandra node is dying. Have
you checked the Cassandra system log? A frequent mistake is
configuring
On Thu, Feb 17, 2011 at 12:37 AM, Peter Schuller
peter.schul...@infidyne.com wrote:
Bottom line: Check /var/log/cassandra/system.log to begin with and see
if it's reporting anything or being restarted.
Thanks, Peter.
In the system.log, I see quite a few of these across several machines.
Thanks,
Up to now i could not see any problems with the index names
For now I will not touch it. If I encounter something I’ll let you know
Von: Aaron Morton [mailto:aa...@thelastpickle.com]
Gesendet: Mittwoch, 16. Februar 2011 21:00
An: user@cassandra.apache.org
Betreff: Re: rename index
There
Hello
If anybody use cassandra throw php, please share you experience. How you
solve problem with thrift_protocol which have tons of bugs (memleaks,
impossible pass long time stamps, wrong work with ZTS, hung when work with
framed transport)
And did you sufficient with php - Cassandra
I am having no problems using thobbs fork of phpcassa. Works a treat.
On 17 Feb 2011 11:38, ruslan usifov ruslan.usi...@gmail.com wrote:
Hello
If anybody use cassandra throw php, please share you experience. How you
solve problem with thrift_protocol which have tons of bugs (memleaks,
You main system is 64 or 32 bit?
And how many nodes of cassandra do you use?
2011/2/17 ruslan usifov ruslan.usi...@gmail.com
Hello
If anybody use cassandra throw php, please share you experience. How you
solve problem with thrift_protocol which have tons of bugs (memleaks,
impossible pass long time stamps, wrong work with
Developing on win7 w/single cassandra node. Deployed to aws large instances
for cassandra and micro for web, micro for php
On 17 Feb 2011 13:36, ruslan usifov ruslan.usi...@gmail.com wrote:
And how many nodes of cassandra do you use?
2011/2/17 ruslan usifov ruslan.usi...@gmail.com
Hello
2011/2/17 Sasha Dolgy sdo...@gmail.com
Developing on win7 w/single cassandra node. Deployed to aws large
instances for cassandra and micro for web, micro for php
In production how many instances for cassandra do you use? And is it
possible to provide your cassandra config?
I haven't tried this, but it should work in theory...
Keep the wrongly named index for now. Create the rightly named index,
then bring down the node and swap file names for the indexes. After
that, you can safely drop the wrongly named index. Unfortunately,
you need to do this for each node.
i think the quesiton you started out with was about using php cassandra.
the underlying cassandra configuration and implementation shouldn't change
if you decide to go with pycassa, hector or phpcassa ... the thrift
interface is suitably abstracted by these...
what i'm not entirely happy with in
Hi All,
I'm experimenting and developing using counters. However, I've come to a
usecase where I need counters to expire and get deleted after a certain time
of inactivity (i.e. have countercolumn deleted one hour after the last
increment).
As far as I can tell counter columns don't have TTL in
http://wiki.apache.org/cassandra/ThirdPartySupport
On Thu, Feb 17, 2011 at 12:20 AM, Sal Fuentes fuente...@gmail.com wrote:
They also offer great training sessions. Have a look at their site for more
information: http://www.datastax.com/about-us
On Wed, Feb 16, 2011 at 3:13 PM, Michael
https://issues.apache.org/jira/browse/CASSANDRA-2103
On Thu, Feb 17, 2011 at 4:05 PM, Utku Can Topçu u...@topcu.gen.tr wrote:
Hi All,
I'm experimenting and developing using counters. However, I've come to a
usecase where I need counters to expire and get deleted after a certain time
of
Hi,
We are in trouble with a strange behavior in cassandra 0.7.2 (also
happened in 0.7.0). Could someone help us?
The problem happens on a column family of super column type named Order.
Data structure is something like:
Order[ a_key ][ date + / + order_id + / (+ suffix) ][attribute] = value
Try turning on GC logging in Cassandra-env.sh, specifically:
-XX:+PrintGCApplicationStoppedTime
-Xloggc:/var/log/cassandra/gc.log
Look for things like: Total time for which application threads were
stopped: 52.8795600 seconds. Anything over about a few seconds may be
causing your
Can anyone confirm that this patch works with the current trunk?
On Thu, Feb 17, 2011 at 4:16 PM, Sylvain Lebresne sylv...@datastax.comwrote:
https://issues.apache.org/jira/browse/CASSANDRA-2103
On Thu, Feb 17, 2011 at 4:05 PM, Utku Can Topçu u...@topcu.gen.tr wrote:
Hi All,
I'm
We have observed the behavior that memtable_flush_after_mins setting not
working occasionally. After some testing and code digging, we finally
figured out what going on.
The memtable_flush_after_mins won't work on certain condition with current
implementation in Cassandra.
In
If you read the discussion on that ticket, the point is that the
approach is fundamentally flawed.
On Thu, Feb 17, 2011 at 10:16 AM, Utku Can Topçu u...@topcu.gen.tr wrote:
Can anyone confirm that this patch works with the current trunk?
On Thu, Feb 17, 2011 at 4:16 PM, Sylvain Lebresne
Your analysis sounds correct to me. Can you open a ticket on
https://issues.apache.org/jira/browse/CASSANDRA ?
On Thu, Feb 17, 2011 at 10:17 AM, Ching-Cheng Chen
cc...@evidentsoftware.com wrote:
We have observed the behavior that memtable_flush_after_mins setting not
working occasionally.
https://issues.apache.org/jira/browse/CASSANDRA-2183
https://issues.apache.org/jira/browse/CASSANDRA-2183Regards,
Chen
www.evidentsoftware.com
On Thu, Feb 17, 2011 at 11:47 AM, Ching-Cheng Chen
cc...@evidentsoftware.com wrote:
Certainly, I'll open a ticket to track this issue.
Regards,
And I think this patch would still be useful and legitimate if the TTL of
the initial increment is taken into account.
On Thu, Feb 17, 2011 at 6:11 PM, Utku Can Topçu u...@topcu.gen.tr wrote:
Yes, I've read the discussion. My use-case is similar to the use-case of
the contributor.
So that's
Below is a link for a simple client side compression scheme. I thought this
might be of interest for some members of the list.
While column values and column names are easy to handle on the client side,
with the use of a custom column name comparator for the column names, the fact
that there
Hi again,
i am still having trouble with this.
If I define the index using cli with these commands:
create column family A with column_type='Standard' and
comparator='TimeUUIDType' and keys_cached=20 and read_repair_chance=1.0 and
rows_cached=0.0 and column_metadata=[{column_name:
I have a resolution for how I'm dealing with this problem for my particular
situation and I'd like to throw it out there to see if you think it should
be integrated into the core Cassandra code.
Just to repeat, the immediate workaround for this is to set
-Dpig.splitCombination=false when you
So after upgrade to 0.7.2, I see this on startup - should I just blow away
these cache files?
WARN [main] 2011-02-17 18:03:24,161 ColumnFamilyStore.java (line 281) error
reading saved cache /var/lib/cassandra/saved_caches/xx-KeyCache
java.io.EOFException
at
https://issues.apache.org/jira/browse/CASSANDRA-2174
Yes, just clear the cache
On Thu, Feb 17, 2011 at 1:06 PM, Damick, Jeffrey jeffrey.dam...@neustar.biz
wrote:
So after upgrade to 0.7.2, I see this on startup – should I just blow
away these cache files?
WARN [main] 2011-02-17
Looks like it's
https://issues.apache.org/jira/browse/CASSANDRA-2172
https://issues.apache.org/jira/browse/CASSANDRA-2172Regards,
Chen
www.evidentsoftware.com
On Thu, Feb 17, 2011 at 1:06 PM, Damick, Jeffrey jeffrey.dam...@neustar.biz
wrote:
So after upgrade to 0.7.2, I see this on
On Thu, Feb 17, 2011 at 6:19 PM, Utku Can Topçu u...@topcu.gen.tr wrote:
And I think this patch would still be useful and legitimate if the TTL of
the initial increment is taken into account.
This is still broken for the same reason.
The problem is that the live-time of a given update
Thanks a lot for the help on this!
From what I can tell that looks like a good solution. Created
https://issues.apache.org/jira/browse/CASSANDRA-2184 to make that
change.
On Thu, Feb 17, 2011 at 11:52 AM, Matt Kennedy stinkym...@gmail.com wrote:
I have a resolution for how I'm dealing with
try setting your email to plain text only, no rich text.
On Thu, Feb 17, 2011 at 1:37 PM, A J s5a...@gmail.com wrote:
--
Even the Magic 8 ball has an opinion on email clients: Outlook not so good.
Maybe https://issues.apache.org/jira/browse/INFRA-3356?
On Thu, Feb 17, 2011 at 12:37 PM, A J s5a...@gmail.com wrote:
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
Where can I get good detailed explanation of the various replication
options (Simple, Old Network and Network) along with snitches. I did
read the definitive guide but not really satisfied.
Is there a good post somewhere explaining this ?
I will have 4 datacenters (assume) and 3 nodes in each
Thanks ! Finally. Did several retries since morning.
On Thu, Feb 17, 2011 at 1:39 PM, Jonathan Ellis jbel...@gmail.com wrote:
Maybe https://issues.apache.org/jira/browse/INFRA-3356?
On Thu, Feb 17, 2011 at 12:37 PM, A J s5a...@gmail.com wrote:
--
Jonathan Ellis
Project Chair, Apache
Why not just create some sort of ACL on the client side and use one
Keyspace? It's a lot less management.
On Thu, Feb 17, 2011 at 12:34 PM, Mimi Aluminium
mimi.alumin...@gmail.comwrote:
Hi,
I really need your help in this matter.
I will try to simplify my problem and ask specific questions
Maybe you could make use of Virtual Keyspaces.
See this wiki for the idea:
https://github.com/rantav/hector/wiki/Virtual-Keyspaces
Bye,
Norman
2011/2/17 Frank LoVecchio fr...@isidorey.com:
Why not just create some sort of ACL on the client side and use one
Keyspace? It's a lot less
What are you using for disk_access_mode ?
Have you tried reducing the JVM head size?
Have you added the Jna.jar file to lib/ ? This will allow Cassandra to lock the
JVM memory.
Aaron
On 17/02/2011, at 9:20 PM, ruslan usifov ruslan.usi...@gmail.com wrote:
2011/2/16 Aaron Morton
Is it possible to change the maximum JVM heap memory use in 0.6.X ?
2011/2/17 Aaron Morton aa...@thelastpickle.com
What are you using for disk_access_mode ?
Have you tried reducing the JVM head size?
Have you added the Jna.jar file to lib/ ? This will allow Cassandra to lock
the JVM memory.
Hi,
Is it ok to update / insert into multiple column families (some regular,
some related super column families) using in one batch?
I earlier had a few separates mutator.execute() calls hitting these CFs, but
I am trying to merge them into a bigger batch.
The issue I am facing is that the
It is fine to use multiple coumn families via batch_mutate. The size
of the batch itself will take some tunning. In what you are describing
below, it will help watch the cassandra logs in debug mode to diagnose
the issue.
In general though, I think a good rule with batch_mutate is to start
with
Messages been dropped means the machine node is overloaded. Look at the thread
pool stats to see which thread pools have queues. It may be IO related, so also
check the read and write latency on the CF and use iostat.
i would try those first, then jump into GC land.
Aaron
On 18/02/2011, at
Hi,
Thanks for replying.
I have kept an eye on the Cassandra logs as well as my app server logs, and
I didn't notice any unusual hector/casandra messages there.
Where can I configure to see cassandra logs in debug mode?
I am pretty sure I haven't touched the 500 mutations in a batch yet. What
bin/cassandra.in.shset Xms and Xmx in the JVM_OPTSAaronOn 18 Feb, 2011,at 09:10 AM, Victor Kabdebon victor.kabde...@gmail.com wrote:Is it possible to change the maximum JVM heap memory use in 0.6.X ?2011/2/17 Aaron Morton aa...@thelastpickle.com
What are you using for disk_access_mode ?Have you
Hector's virtual keyspaces would work well for what you describe. Ed
Anuff, who added this feature to Hector, showed me a working
multi-tennancy based app the other day and it worked quite well.
On Thu, Feb 17, 2011 at 1:44 PM, Norman Maurer nor...@apache.org wrote:
Maybe you could make use of
Oh right but Cassandra doesn't really respect that, I thought there was
another option to set that.
Just for your information, I set xms and xmx very low with a small amount of
data. I am waiting to be able to connect jconsole, I don't know why it is
not reachable at the moment. Here is my result
Sorry I forgot to say that this is the partial result of :
ps aux | grep cassandra
Best regards
2011/2/17 Victor Kabdebon victor.kabde...@gmail.com
Oh right but Cassandra doesn't really respect that, I thought there was
another option to set that.
Just for your information, I set xms and
log4-server.properties in the conf directory of cassandra (requires a
restart) or via JMX through JConsole or similar on
o.a.c.service.StorageService#setLog4jLevel
Is there a threshold under which you can successfully insert in batch
mode? Even with something low like 10 entries?
On Thu, Feb 17,
2011/2/17 Aaron Morton aa...@thelastpickle.com
What are you using for disk_access_mode ?
I set config default: auto.
Have you tried reducing the JVM head size?
No i set default settings
Have you added the Jna.jar file to lib/ ? This will allow Cassandra to lock
the JVM memory.
No, and
How are you constructing the IndexSlicesQuery? Does it have an equals
clause with that UUID as the column name?
On Thu, Feb 17, 2011 at 11:32 AM, Roland Gude roland.g...@yoochoose.com wrote:
Hi again,
i am still having trouble with this.
If I define the index using cli with these commands:
Thanks. I will set the debug mode and see/share if it shows any relevant info.
The smaller batches of 20 or so column mutations had been working fine.
After merging, the total # of mutations across all CFs must not be crossing
60-70.
The problem is that it is not slow - it seems just hung
You could try turning up the thrift_max_message_length_in_mb and
thrift_framed_transport_size_in_mb (by default 16 and 15MB
respectively) in cassandra.yaml to see if that helped.
On Thu, Feb 17, 2011 at 2:46 PM, roshandawr...@gmail.com wrote:
Thanks. I will set the debug mode and see/share if
On Thu, Feb 17, 2011 at 1:41 PM, A J s5a...@gmail.com wrote:
Where can I get good detailed explanation of the various replication
options (Simple, Old Network and Network) along with snitches. I did
read the definitive guide but not really satisfied.
Is there a good post somewhere explaining
what i'm not entirely happy with in using php versus java/hector is that
there isn't any connection pooling. maybe that's just me and my poor
skills.
Better connection pooling and failover are on the way. You can check on the
progress in the connection-pooling branch here:
eager to test! thanks tyler ...
On Thu, Feb 17, 2011 at 10:49 PM, Tyler Hobbs ty...@datastax.com wrote:
what i'm not entirely happy with in using php versus java/hector is that
there isn't any connection pooling. maybe that's just me and my poor
skills.
Better connection pooling and
How does this connection pooling fit in with the TSocketPool.php classes?
Or am I off the wicket here?
Right now, TSocketPool is not being used (in pycassa or phpcassa);
individual TSockets are managed within the library. TSocketPool may be a
good alternative to this in the future, but I
Gregory,There is a vote going on for 0.6.12 nowhttp://www.mail-archive.com/dev@cassandra.apache.org/msg01808.htmlIf you have time grab the bin and give it a test http://people.apache.org/~eevansAaronOn 16 Feb, 2011,at 09:21 PM, Aaron Morton aa...@thelastpickle.com wrote:Have checked it's all in
Victor, I'm a bit confused here as we've now got two conversations in this thread.Can you please start a new thread about your memory problem, I'm not clear on the details. Please include...- cassandra version- JVM heap settings from bin/cassandra.in.sh or conf/cassandra-env.sh- disk_access_mode-
I'm thinking about visiting Sydney in the last week of March and Melbourne in the first week of April.Any user groups in those cities that would like to talk about Cassandra on around those times?Email me directly.cheersAaron
Jonathan,When you get time could you please explain that a little more. Got a feeling I'm about to learn something :)ThanksAaronOn 18 Feb, 2011,at 01:36 PM, Jonathan Ellis jbel...@gmail.com wrote:Please note that this won't affect the actual memory in use, only how
the OS reports it.
On Thu, Feb
For background...http://wiki.apache.org/cassandra/ArchitectureOverview(There is a section on consistency in there)For deep background...http://www.allthingsdistributed.com/2008/12/eventually_consistent.htmlhttp://s3.amazonaws.com/AllThingsDistributed/sosp/amazon-dynamo-sosp2007.pdfIn short, yes
Aaron,
Thank you very much for initiating the voting process. I'm looking forward to
running this release.
Was there any discussion around improving the communication of known issues
with releases?
Gregory
From: Aaron Morton [mailto:aa...@thelastpickle.com]
Sent: Thursday, February 17, 2011
I saw on this page: http://wiki.apache.org/cassandra/API07
*KeyRange
A KeyRange is used by get_range_slices to define the range of keys to get
the slices for.
The semantics of start keys and tokens are slightly different. Keys are
start-inclusive; tokens are start-exclusive. Token ranges may
Thank the committers for doing the release.With regard to stability / communication in the last week or two -http://www.mail-archive.com/dev@cassandra.apache.org/msg01753.htmlAaronOn 18 Feb, 2011,at 03:17 PM, Gregory Szorc gregory.sz...@xobni.com wrote:Aaron,Thank you very much for initiating the
I'm unable to reproduce this in pycassa starting with a clean database. Are
you doing anything else to these rows besides inserting them?
Here's the complete script I'm using below. Could you confirm that this
causes problems for you?
- Tyler
=
import sys
import pycassa
pool =
Are the very freshly written columns to a row in memtables, efficiently
updated/overwritten by edited/new column values.
After flushing of memtable, are those(edited + unedited ones) columns stored
together on disk (in same blocks!?) as if they were written in one single
operation or same time ??
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