Hi,
Have some thoughts on load balancing on current / new nodes. I have come
across some posts around this, but not sure of what is being finally
proposed, so..
>From what I have read, a nodebalance on a node does a decommission and
bootstrap of that node. Is there a reason why it is that way (d
Thanks for the reply,
Issue resolved, thift site-packages/thrift/transport/TTransport.py not in
proper path.
I have updated Python PATH , stress.py worked without any issues.
From: Peter Schuller
To: user@cassandra.apache.org
Sent: Wed, August 4, 20
> After I add the thift libs to CLASS_PATH , it's failing with following
> error.
>
> /stress.py: line 21: have_multiproc: command not found
> ./stress.py: line 22: try:: command not found
And that sounds like stress.py is being run by a shell rather than by
Python. Not sure how that happened sinc
(Jonathan Ellis' suggestion to just use 'ant gen-thrift-py' is of
course preferred over my manual approach)
As for this:
> Now it's failing with following error. Do I have put thrift.jar in JAVA
> CLASSPATH.
>
> Traceback (most recent call last):
> File "stress.py"
After I add the thift libs to CLASS_PATH , it's failing with following error.
/stress.py: line 21: have_multiproc: command not found
./stress.py: line 22: try:: command not found
./stress.py: line 23: from: command not found
./stress.py: line 24: from: command not found
./stress.py: line 25: Thr
Peter, Thank you so much for reply.
I am not much familiar with python.
I have executed the commands mentioned in your reply.
Now it's failing with following error. Do I have put thrift.jar in JAVA
CLASSPATH.
Traceback (most recent call last):
File "stress.p
or just
ant gen-thrift-py
python contrib/py_stress/stress.py
On Wed, Aug 4, 2010 at 5:53 PM, Peter Schuller
wrote:
>> Can somebody please give steps to run cassandra stess.py program.
>
> Assuming you have the thrift compiler installed, something like (from
> memory, not tested):
>
> cd contrib
No. I can't think of a data model where that would be a good fit.
On Wed, Aug 4, 2010 at 5:15 PM, Kartal Guner wrote:
> Hello, I want to know if the following is possible:
>
>
>
> I want to query multiple keys in a column family. I want to limit the total
> # of columns returned.
>
>
>
> The nu
Let's centralize that conversation over on
https://issues.apache.org/jira/browse/CASSANDRA-1358
On Wed, Aug 4, 2010 at 4:32 PM, Mike Malone wrote:
> So after 4096 messages get pushed on the row-read-stage queue (or any other
> multiThreadedStage) the deserializer basically becomes a single-thread
> Can somebody please give steps to run cassandra stess.py program.
Assuming you have the thrift compiler installed, something like (from
memory, not tested):
cd contrib/py_stress
thrift --gen py:new ../../interface/cassandra.thrift
export PYTHONPATH=$(pwd)/gen-py
python stress.py
--
/ Peter S
Hello, I want to know if the following is possible:
I want to query multiple keys in a column family. I want to limit the total #
of columns returned.
The number of columns for a given key can be anywhere from 0 to several million.
For example I want to get 50 columns total from keys A & C. I
Jonathan Ellis gmail.com> writes:
>
> did you try compact instead of cleanup, anyway?
>
Hi Jonathan,
Thanks for your reply. Actually, I didn't use compact, I used cleanup. But I
did some testing with compact today since you mentioned it. Using nodetool
compact does improve my disk usage on e
Can somebody please give steps to run cassandra stess.py program.
So after 4096 messages get pushed on the row-read-stage queue (or any other
multiThreadedStage) the deserializer basically becomes a single-threaded
blocking queue that prevents any other inter-node RPC from occurring..?
Sounds like it's a problem either way. If the row read stage is what's
backed
reported https://issues.apache.org/jira/browse/CASSANDRA-1359
On Wed, Aug 4, 2010 at 9:51 PM, Jonathan Ellis wrote:
> That's definitely a bug.
>
> On Wed, Aug 4, 2010 at 2:13 PM, Ran Tavory wrote:
> > ok, so I don't send writes to bootstrapping or decommissioned nodes,
> that's
> > cool, but wh
That's definitely a bug.
On Wed, Aug 4, 2010 at 2:13 PM, Ran Tavory wrote:
> ok, so I don't send writes to bootstrapping or decommissioned nodes, that's
> cool, but what about the inconsistent ring view after nodetool move, isn't
> this strange?
> After the move, the moved node has the correct vi
No, MDP is backing up because Row-Read-Stage [the stage after MDP on
reads] is full at 4096, meaning you're not able to process reads as
quickly as the requests are coming in.
On Wed, Aug 4, 2010 at 2:21 PM, Mike Malone wrote:
> This may be your
> problem: https://issues.apache.org/jira/browse/CA
I have ring of three nodes. When i try to decommission one of the
machine then i got the following exception:
java.util.concurrent.RejectedExecutionException: ThreadPoolExecutor has
shut down
at org.apache.cassandra.concurrent.DebuggableThreadPoolExecutor
$1.rejectedExecution(DebuggableTh
This may be your problem:
https://issues.apache.org/jira/browse/CASSANDRA-1358
The message deserializer executor is being created with a core pool size of
1. Since it uses a queue with unbounded capacity new requests are always
queued and the thread pool never grows. So the message deserializer be
ok, so I don't send writes to bootstrapping or decommissioned nodes, that's
cool, but what about the inconsistent ring view after nodetool move, isn't
this strange?
After the move, the moved node has the correct view of the ring but all
other nodes have the old view. I waited a few minutes after th
Please let me know what happens when you test it for Windows.
Alaa
lisek wrote:
Ok, I've figure it out with little help with people from IRC, , at first of
course you have to edit access.properties and passwd.properties in “conf”
dir – I think you will know what to do here.
After that, edit ca
> Thanks for the link but that doesn't answer my question. I happen to know
> quite allot about tuning Linux/Solaris/*NIX. I'm trying to figure out the
> limits in cassandra, when it breaks, and why.
>
> So, anyone know of or published benchmarks on messing with these values?
In order for such a b
If you're heading to the Cassandra Summit next week and have an interesting use
case for Cassandra, you can submit your use case as a lightning talk.
See: http://www.riptano.com/blog/lightning-talks-cassandra-summit-sf
> Are you saying this based on your personal experience?
> Or is this just an educated guess?
Whatever the cause, the end result is that
javax.management.remote.JMXConnector does not exist. So the most
likely culprits would be that CLASSPATH is different, or you're using
a different JVM. For examp
NullPointerException--it sounds like you're restarting?
If so, you should look into `nodetool drain`.
http://wiki.apache.org/cassandra/FAQ#modify_cf_config
Gary
On Wed, Aug 4, 2010 at 03:27, David Boxenhorn wrote:
> When I change schema I need to delete the commit logs - otherwise I get a
> nul
Are you saying this based on your personal experience?
Or is this just an educated guess?
On Tue, Aug 3, 2010 at 11:19 PM, Brandon Williams wrote:
> On Fri, Jul 30, 2010 at 9:58 AM, osishkin osishkin
> wrote:
>>
>> I'm talking about the James Golick plugin. I followed the
>> instructions, and go
Don't point clients at nodes that aren't part of the ring. Cassandra
rejecting requests when you do is a "feature."
On Wed, Aug 4, 2010 at 6:52 AM, Ran Tavory wrote:
> Is this a known issue?
> Running 0.6.2 I moved a node to different token and eventually saw errors in
> the log.
>
> ERROR [ROW-
Put your commitlog on a different device than the data files.
On Tue, Aug 3, 2010 at 10:46 PM, Mingfan Lu wrote:
> Hi,
> I have a 4-node cassandra cluster. And I find when the 4 nodes are
> flushing memtable and gc at the very similar moment, the throughput
> will drop and latency will increase
"During bootstrap nodetool may report that the new node is not
receiving nor sending any streams, this is because the sending node
will first copy out locally the data they will send to the receiving
one, which can be seen in the sending node through the the
"AntiCompacting... AntiCompacted" log me
Thanks!
On Wed, Aug 4, 2010 at 1:36 PM, Matthew Grogan wrote:
> See steps 1-3 in the description section of the issue below:
>
> https://issues.apache.org/jira/browse/CASSANDRA-44
>
>
> On 4 August 2010 09:27, David Boxenhorn wrote:
>
>> When I change schema I need to delete the commit logs - ot
Ok, I've figure it out with little help with people from IRC, , at first of
course you have to edit access.properties and passwd.properties in “conf”
dir – I think you will know what to do here.
After that, edit cassandra.in.sh wich is in bin directory where you have
installation of Cassandra.
A
Hi all,
Could someone tell me what I have to add in storage .conf to login into
Cassandra?
I’ve got in .conf
org.apache.cassandra.auth.SimpleAuthenticator
I found this
http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Login-failure-with-SimpleAuthenticator-td4973907.html
Where is
Is this a known issue?
Running 0.6.2 I moved a node to different token and eventually saw errors in
the log.
ERROR [ROW-READ-STAGE:116804] 2010-08-04 06:34:29,699
DebuggableThreadPoolExecutor.java (line 101) Error in ThreadPoolExecutor
java.lang.RuntimeException: Cannot service reads while bootst
See steps 1-3 in the description section of the issue below:
https://issues.apache.org/jira/browse/CASSANDRA-44
On 4 August 2010 09:27, David Boxenhorn wrote:
> When I change schema I need to delete the commit logs - otherwise I get a
> null pointer exception.
>
> Is there a way that I can forc
When I change schema I need to delete the commit logs - otherwise I get a
null pointer exception.
Is there a way that I can force Cassandra to empty the commit logs so I
won't lose data???
(There has not been much recent activity, nor is there much current
activity. There was only one log and it
Ok, problem solved - I've removed all from logs and data directories run it
with sun jdk and for now everything works fine.
From: Maciej Lisowski [mailto:m.lisow...@powerprice.pl]
Sent: Tuesday, August 03, 2010 4:47 PM
To: user@cassandra.apache.org
Subject: unable to start cassandra
Hi al
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