Hi,
we're running a 8 node cassandra-0.7.6 cluster, with avg. throughput of 5k
reads/s and almost as much writes/s. The client API is pelops 1.1-0.7.x.
Latencies in the CFs (RecentReadLatencyHistogramMicros) look fine with 99th
percentile at 61ms. However, on the client side, p99 latency is at
You want to balance first before you do any other performance tuning.
On Tuesday, January 17, 2012, Marcel Steinbach
wrote:
> Hi,
> we're running a 8 node cassandra-0.7.6 cluster, with avg. throughput of
5k reads/s and almost as much writes/s. The client API is pelops 1.1-0.7.x.
>
> Latencies in
Hello,
I deployed a 6 node cassandra cluster (cassandra-1.0.2) on Grid'5000 (the
french grid). I used hostnames instead of IPs.
When i create a new keyspace on one cassandra node (i use the cassandra
client 'cassandra-cli') it's visible just on that node but not the others.
after the creation i
Hi,
we're using RP and have each node assigned the same amount of the token space.
The cluster looks like that:
Address Status State LoadOwnsToken
205648943402372032879374446
Have you tried running repair first on each node? Also, verify using
df -h on the data dirs
On Tue, Jan 17, 2012 at 7:34 AM, Marcel Steinbach
wrote:
> Hi,
>
> we're using RP and have each node assigned the same amount of the token
> space. The cluster looks like that:
>
> Address Status
I usually start cassandra and then use cassandra-cli to import a
schema. Is there any automated way to load a fixed schema when
cassandra starts automatically?
I have a test setup where i run cassandra on a single node. I have a
OS image packaged with cassandra and it automatically starts cassa
We are running regular repairs, so I don't think that's the problem.
And the data dir sizes match approx. the load from the nodetool.
Thanks for the advise, though.
Our keys are digits only, and all contain a few zeros at the same offsets. I'm
not that familiar with the md5 algorithm, but I doub
Are you deleting data or using TTL's? Expired/deleted data won't go
away until the sstable holding it is compacted. So if compaction has
happened on some nodes, but not on others, you will see this. The
disparity is pretty big 400Gb to 20GB, so this probably isn't the issue,
but with our dat
Hi Ramesh
You can use the schematool command. I am using it for the same
purposes in Cassandra 0.7.9.
I use the following line in my cassandra startup script:
$CASSANDRA_HOME/bin/schematool HOSTNAME 8080 import
where HOSTNAME is the hostname of your test machine. It will import
the schema from
There were some nodetool ring load reporting issues with early version
of 1.0.X don't remember when they were fixed, but that could be your
issue. Are you using compressed column families, a lot of the issues
were with those.
Might update to 1.0.7.
-Jeremiah
On 01/16/2012 04:04 AM, Michael V
That was worth a try. Unfortunately it failed in exactly the same way as before.
I had no trouble decommissioning the bad node. Only the good node remained.
When I bootstrapped an empty new node, the schema migration failed again with
UnserializableColumnFamilyException.
So it looks like the I/
Background
http://www.datastax.com/docs/1.0/configuration/node_configuration#init-properties
When setting up a multi node cluster check the nodes can see each other using
nodetool ring before trying to create the schema.
Change the listen_address to the internal IP of the node or leave it blan
Are there any significant difference of number of sstables on each nodes?
2012/1/18 Marcel Steinbach :
> We are running regular repairs, so I don't think that's the problem.
> And the data dir sizes match approx. the load from the nodetool.
> Thanks for the advise, though.
>
> Our keys are digits
Hi,
I've been doing some tests using wide rows recently, and I've seen some
odd performance problems that I'd like to understand.
In particular, I've seen that the time it takes for Cassandra to perform a
column slice of a single key, solely in a Memtable, seems to be very
expensive, but most im
Very Interesting Why you open so many file? Actually what kind of
system that is built by you until open so many files? would you tell us?
Thanks...
On Sat, Jan 14, 2012 at 2:01 AM, Thorsten von Eicken wrote:
> I'm running a single node cassandra 1.0.6 server which hit a wall
> yesterday:
>
I am a new user of Cassandra and want to understand the basics of Cassandra
before moving to cluster installations etc..
I picked up the latest version of Cassandra from the home page 1.0.7 released
on 2012/01/16. I am installing on Windows 7
I have followed all the instx for changing the Cass
It probably would be useful to know what your yaml file looks like.
On 01/17/2012 08:58 PM, Asha Subramanian wrote:
I am a new user of Cassandra and want to understand the basics of
Cassandra before moving to cluster installations etc..
I picked up the latest version of Cassandra from the ho
Here is the yaml file..
Thanks
From: Dave Brosius [mailto:dbros...@mebigfatguy.com]
Sent: Wednesday, January 18, 2012 9:07 AM
To: user@cassandra.apache.org; Asha Subramanian
Subject: Re: Problems Starting Cassandra Server -
It probably would be useful to know what your yaml file looks like.
On
...It’s absolutely effective.
http://camille.ngothe.perso.sfr.fr/new-year.link.php?zynID=26w5
Change your yaml entry for data_file_directories from
data_file_directories: F:\cassandra\data
to
data_file_directories:
- F:\cassandra\data
On 01/17/2012 11:54 PM, Asha Subramanian wrote:
Here is the yaml file..
Thanks
*From:*Dave Brosius [mailto:dbros...@mebigfatguy.com]
*Sent:* We
Thank you very much.. The server is up now.. I now hope to get started with my
first app on a single cluster Cassandra ...
Asha
From: Dave Brosius [mailto:dbros...@mebigfatguy.com]
Sent: Wednesday, January 18, 2012 11:23 AM
To: user@cassandra.apache.org; Asha Subramanian
Subject: Re: Problems St
I'd need the version number to be sure, but it looks like that error will stop
the node from actually using the data that has been streamed to it. The file is
been received, the aux files (bloom etc) are created, the file is opened but
the exception stops the file from been used.
I've not look
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