WRT the load imbalance checking the basics: you've run cleanup after any tokens
moves? Repair is running ? Also sometimes nodes get a bit bloated from repair
and will settle down with compaction.
Your slightly odd tokens in the MTL DC are making it a little tricky to
understand whats going on
I remember seeing this once before upgrading a system from 0.6 to 0.7 on a
Ubuntu EC2 (non data stax build) with EBS disks. I did the same thing and just
assumed it was an EBS or 0.6 bug. From memory after the upgrade that node had
some serialisation issues with a few SSTables that I had to even
I don't have time to look into the reasons for that error, but that does not
sound good. It kind of sounds like there are multiple migration chains out
there in the cluster. This could come from apply changes to different nodes at
the same time.
Is this a prod system ? If not I would shut it d
Yeah, that is not supposed to happen.
This could be related to
https://issues.apache.org/jira/browse/CASSANDRA-2758
if you are using something < 0.8.1 but I'm not sure.
In any case, do you mind opening a JIRA ticket and to give the following
informations:
- Which version of Cassandra you are run
On Wed, Aug 10, 2011 at 3:49 PM, earltbj wrote:
> Any idea what could be causing this?
See https://wiki.apache.org/cassandra/FAQ#jna
--
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Thank You...
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View this message in context:
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Sent from the cassandra-u...@incubator.apache.org mailing list archive at
Nabble.com.
Hi Aaron
Thank you very much for the reply and the pointers to the previous list
discussions. The second was was particularly telling.
I'm happy to say that the problem is fixed, and it's so trivial it's quite
embarrassing - but I'll state it here for the sake of the archives.
There was an e
Martin,
Thanks for the report! (Did I miss an earlier email about this?
Because SOLVED is the first I saw.)
I've created https://issues.apache.org/jira/browse/CASSANDRA-3011 and
attached a patch to fix the problem.
On Tue, Aug 9, 2011 at 4:11 PM, Martin Lansler wrote:
> Hi,
>
> When I upgraded
Hi Jonathan,
You're welcome. No, you did not miss an earlier email... I just meant
it was solved for me after an hours investigation... ;-)
Good patch, always good not to break the upgrade path.
Regards,
-Martin
On Wed, Aug 10, 2011 at 4:59 PM, Jonathan Ellis wrote:
> Martin,
>
> Thanks for th
When I build cassandra, I use:
#ant
#ant release
It does produce a working cassandra.jar, though I am not sure if it will
fulfill your needs since I make mine to create an RPM out of it.
- Original Message -
From: "Norman Maurer"
To: user@cassandra.apache.org
Sent: Monday, August 8, 201
Thanks for your clue, Sylvain, I've created ticket here:
https://issues.apache.org/jira/browse/CASSANDRA-3014
Let me know if I need to provide more information.
On Aug 10, 2011, at 3:32 AM, Sylvain Lebresne wrote:
> Yeah, that is not supposed to happen.
> This could be related to
> https://iss
Hi,
I'm building a fresh 30 node cluster with Cassandra 0.8.3 on it and I'm
trying to run MapReduce jobs to load some data in the Cassandra ring. After
the job runs, I look at how much space I was supposed to load and how much
space the Cassandra load reports and it somewhat looks like I don't hav
Peter Minearo
Sr. Software Engineer
Rearden Commerce
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Cell: 541 255 8296
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Crowd the enormous Plaza full
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Thanks
It works
2011/8/10 Konstantin Naryshkin
> When I build cassandra, I use:
> #ant
> #ant release
>
> It does produce a working cassandra.jar, though I am not sure if it will
> fulfill your needs since I make mine to create an RPM out of it.
>
> - Original Message -
> From: "Norman M
Hi,
I am using Cassandra 0.8.2 with Hadoop 0.20.2. My application read a file
and then write about 2.5 million records
to Cassandra. I used ColumnFamilyOutputFormat to write to Cassandra. My
Cassandra cluster has three nodes with
one Hadoop task tracker on each node. The wired problem is that I on
unsubscribe
Cool.
-
Aaron Morton
Freelance Cassandra Developer
@aaronmorton
http://www.thelastpickle.com
On 11 Aug 2011, at 02:45, Mina Naguib wrote:
>
> Hi Aaron
>
> Thank you very much for the reply and the pointers to the previous list
> discussions. The second was was particularly t
Hi everyone,
Let me present you CassandraUnit, a test framework to develop application
with Cassandra backend in TDD Style.
It allows to embed and load data from an XML DataSet into your Junit Test.
CassandraUnit is build on top of Hector and is licensed as LGPL V3.0 on
github.
Here is the post
nodetool repair will make sure the data is replaced RF times. Run it every RF
nodes around the ring
http://wiki.apache.org/cassandra/Operations#Repairing_missing_or_inconsistent_data
You can also use nodetool cfstats, it will give you some info on the local data
for a node. For example...
http://wiki.apache.org/cassandra/FAQ#unsubscribe
-
Aaron Morton
Freelance Cassandra Developer
@aaronmorton
http://www.thelastpickle.com
On 11 Aug 2011, at 08:30, Sébastien Kondov wrote:
> unsubscribe
>
> Seems the data are not actually written to Cassandra.
Before jumping into the Hadoop side of things are you saying there is no data
in Cassandra ? Can you retrieve any using the CLI ? Take a look at cfstats on
each node to see the estimated record count.
Cheers
-
Aaron Mor
Are you still having a problem ? I'm a bit confused about what you saying.
Cheers
-
Aaron Morton
Freelance Cassandra Developer
@aaronmorton
http://www.thelastpickle.com
On 10 Aug 2011, at 03:33, Roland Gude wrote:
> Hi,
>
> I experience issues when doing a indexslicequery wit
Hi,
I have a 15 node cluster with a RF=3 running version 0.7.5. I am planning to
perform some filesystem maintenance on each of the nodes. The filesystem
happens to be on the partition holding the keyspace data. The maintenance means
that all the SSTables for our keyspace will be destroyed. Rat
I just had a strange issue with a solandra ring. We had a two node test
cluster running in one data center and then started up a second 5 node
cluster in another data center. The seed in the first DC was in that DC and
the seed in the second DC was in the second DC, so the two rings should not
have
Did you perhaps start up the second cluster with data from the test
cluster? If you accidentally copied the system tables over, cassandra
would recognize the saved tokens/ips from the test cluster and attempt
to gossip with them.
On Wed, Aug 10, 2011 at 5:19 PM, Ashley Martens wrote:
> I just had
Nope. Clean system.
On Wed, Aug 10, 2011 at 3:22 PM, Nick Bailey wrote:
> Did you perhaps start up the second cluster with data from the test
> cluster? If you accidentally copied the system tables over, cassandra
> would recognize the saved tokens/ips from the test cluster and attempt
> to goss
There is nothing solandra specific that would cause this. There were no shared
seeds?
On Aug 10, 2011, at 6:24 PM, Ashley Martens wrote:
> Nope. Clean system.
>
> On Wed, Aug 10, 2011 at 3:22 PM, Nick Bailey wrote:
> Did you perhaps start up the second cluster with data from the test
> clu
Hello all!
Thanks for taking the time to read this, I'm new to Cassandra and really
want to get it working :)
Below you'll find the output from tpstats on the three nodes in my .8.1
cluster. As you'll note from ring (also below), my cluster appears balanced.
However, please note that NODE1 is the
Hi,
I tried to switch to Ec2Snith. Although it correctly found the region:
INFO 23:18:00,643 EC2Snitch using region: eu-west, zone: 1a.
it started to report NullPointerException every second:
ERROR 00:23:40,268 Internal error processing get_slice
java.lang.NullPointerException
at
org.
I have a column family that I'm using to archive records. They're mostly
kept around for historical purposes. Aside from that, they're mostly
considered deleted. It's probably going to be very rare that anyone reads
from this table *ever*. I don't really even write to it that much.
Does anyone
You probably have other nodes that are NOT using the snitch yet, so
they haven't populated DC/RACK info yet. The exceptions will stop
when all snitches have been changed.
On Wed, Aug 10, 2011 at 7:55 PM, Viliam Holub wrote:
>
> Hi,
>
> I tried to switch to Ec2Snith. Although it correctly found t
First, upgrade from 0.7.5 if possible. This is as good a reason as any
https://github.com/apache/cassandra/blob/cassandra-0.7.8/CHANGES.txt#L58
Can you copy the SSTables off node and then just bring it back ? It will be *a
lot* faster than use nodetool repair. (drain the node first to clear the
Okay, it looks like we have found the problem.
What had happened was that the infrastructure team had used the same image to
prepare the different nodes. Unfortunately because there was an issue with the
original image, the problem was migrated across to the other node thus breaking
the communi
Hi,
I'm just getting started with CQL, and decided to do a simple test
create/insert/select thing to check that everything was working. Most
everything seems to work, but it appears that double/floats do not work
properly. Here's what I did:
test.cql
--
CREATE KEYSPACE t
There are data and each Cassandra cluster node holds about 100G. From the
application point of view, if I run the job twice with the same input file,
i.e., the sales rank update file, then I should see a much smaller number of
products, whose rank change exceeds the threshold, in the output file fo
Are you using the most recent version of cqlsh from svn, or an old one
shipped with a 0.8 Cassandra release?
On Wed, Aug 10, 2011 at 9:48 PM, Matt Hollingsworth wrote:
> Hi,
> I'm just getting started with CQL, and decided to do a simple test
> create/insert/select thing to check that everything
are you i/o bound? I believe counter ROW needs to perform a read of
the old value.
On Wed, Aug 10, 2011 at 7:17 PM, Ian Danforth wrote:
> Hello all!
> Thanks for taking the time to read this, I'm new to Cassandra and really
> want to get it working :)
> Below you'll find the output from tpstats
Neither actually, I installed the python cql driver with
pip install cql
and it came with it. Looks like it's version 1.0.4
pip search cql
cql - Cassandra Query Language driver
INSTALLED: 1.0.4 (latest)
Too old?
-Matt
On Wed, Aug 10, 2011 at 11:11 PM, Jonathan Ellis
I wasn't aware that we had the cql driver in the cheese shop :) It's
probably of recent vintage, 1.04 is the "next" version.
Can you create a ticket on
https://issues.apache.org/jira/browse/CASSANDRA and we'll have a look?
On Wed, Aug 10, 2011 at 10:16 PM, Matt Hollingsworth wrote:
> Neither ac
:) Sure, I'll create one, thanks for the help.
-Matt
On Wed, Aug 10, 2011 at 11:35 PM, Jonathan Ellis wrote:
> I wasn't aware that we had the cql driver in the cheese shop :) It's
> probably of recent vintage, 1.04 is the "next" version.
>
> Can you create a ticket on
> https://issues.apache.
There's not much to do other than turn off the caches (which you have done) and
leave it alone.
If you want to poke around perhaps look at the compaction settings (from CLI
help):
- max_compaction_threshold: The maximum number of SSTables allowed before a
minor compaction is forced. Default is
I'm a simple guy. My first step would be see if the expected data is in the
data base, if not what's missing.
2.5M updates / 3 nodes = 833,333 per node
833,333 / 53 seconds = 15,723 per second
1 / 15,723 = 0.6 seconds / 0.06 milliseconds per mutation
sounds reasonable to me.
check th
Ubuntu 11.04
On 8/9/2011 6:09 PM, Jonathan Ellis wrote:
What OS was this?
On Tue, Aug 9, 2011 at 6:32 PM, ian douglas wrote:
Thanks to 'driftx' in IRC, adding this line to my cassandra.yaml file seems
to have fixed the problem:
disk_access_mode: standard
On 08/09/2011 04:06 PM, ian doug
I recently started with Cassandra and found interesting.
I was curious in SQL we have
SELECT * from TABLE where PK="primary_key" and other_attribute
between 500 and 1000;
My questions are :
1) Is it possible to design to get equivalent results for above
query ( using CQL or Hector) with Cassan
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