A simple kill without -9 should work. Have you tried that?
On , Jason Pell wrote:
Check out the rpm packages from Cassandra they have init.d scripts that
work very nicely, there are debs as well for ubuntu
Sent from my iPhone
On Jul 27, 2011, at 3:19, Priyanka priya...@gmail.com> wrote:
Thank you Jonathan.. :)
On 26 July 2011 20:08, Jonathan Ellis wrote:
> cassandra.db.Caches
>
> On Tue, Jul 26, 2011 at 2:11 AM, Nilabja Banerjee
> wrote:
> > Thank you every one it is working fine.
> >
> > I was watching jconsole behavior...can tell me where exactly I can find "
> > Rece
Hi,
I thought I share the following with this mailing list as a number of other
users seem to have had similar problems.
We have the following set-up:
OS: CentOS 5.5
RAM: 16GB
JVM heap size: 8GB (also tested with 14GB)
Cassandra version: 0.7.6-2 (also tested with 0.7.7)
Oracle JDK version: 1.6.
You should see this thread about Cassandra with a SAN:
http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Cassandra-on-iSCSI-td5945217.html
On Tue, Jul 26, 2011 at 4:38 PM, Andres Rodriguez Contreras
wrote:
> Hi, which is the allocation unit size to format a hard drive to
> use Cass
Hi, which is the allocation unit size to format a hard drive to use
Cassandra, usingUbuntu server and a SAN (Storage Area Network).
Hello,
I'm evaluating cassandra for use in my system. I could add approximately 16
million items using a single node. I'm using libcassandra (I can find my way
through its code when I need to) to connect to it and I already have some
infrastructure for handling and adding those items (I was usi
Check out the rpm packages from Cassandra they have init.d scripts that work
very nicely, there are debs as well for ubuntu
Sent from my iPhone
On Jul 27, 2011, at 3:19, Priyanka wrote:
> I do the same way...
>
> On Tue, Jul 26, 2011 at 1:07 PM, mcasandra [via [hidden email]] <[hidden
> ema
Thanks for the info guys.
I'm running compaction on the two very highly loaded nodes now in hopes of
the data volume going down. But I'm skeptical because I don't see how it got
so unbalanced in the first place (all nodes were up while the writes were
being injected).
I should have an update tomo
> Restarting the service will drop all the memmapped caches, cassandra caches
> are saved / persistent and you can also use memcachd if you want.
Well, the OS won't evict everything from page cache just because the
last process to map them exits. That said, since restarts tend to have
secondary e
Did you install via a package or tarball binaries?
Packages allow you to run cassandra as a service with
sudo service cassandra
But if you are running via tarballs, then yes, running a kill command
against Cassandra is the way to do it since Cassandra runs in crash-only
mode. Kill would work ho
After much research and experimentation, I figured out how to get
sstableloader running on the same machine as a live cassandra node instance.
The key, as Jonathan stated is to configure sstableloader to use a different
ipaddress than the running cassandra instance is using. To do this, I ran
thi
this is how my data looks
“rowkey1”:{
“supercol1”:{ “col1”:T,”col2”:C}
“supercol2”:{“col1”:C,”col2”:T }
“supercol3”:{ “col1”:C,”col2”:T}
}
"rowkey2”:{
“supercol1”:{ “col1”:A,”col2”:A}
“supercol2”:{“col1”:A,”col2”:T }
Supercolumn has two columns and each column has only one byte.
It is a bit faster but not significant.
On Tue, Jul 26, 2011 at 12:49 PM, Jake Luciani wrote:
> It doesn't read the entire row, but it does read a section of the row from
> disk...
>
> How big is each supercolumn? If you re-read the
Thanks Philippe , I have a question here...I am specifying the required
super column.Does it still need to read the entire row?
Or is it because am listing all the slices and then going to each slice and
picking data for the required super column?
SlicePredicate slicePredicate = new SlicePredicate(
I do the same way...
On Tue, Jul 26, 2011 at 1:07 PM, mcasandra [via
cassandra-u...@incubator.apache.org] <
ml-node+6622977-1598721269-336...@n2.nabble.com> wrote:
> I need to write cassandra start/stop script. Currently I run "cassandra" to
> start and kill -9 to stop.
>
> Is this the best way?
On Tue, Jul 26, 2011 at 5:39 PM, Priyanka wrote:
>
> Hello All,
>
> I am doing some read tests on Cassandra on a single node.But they
> are turning up to be very slow.
> Here is the data model in detail.
> I am using a super column family.Cassandra has total 970 rows and each row
> has 62
It doesn't read the entire row, but it does read a section of the row from
disk...
How big is each supercolumn? If you re-read the data does the query time
get faster?
On Tue, Jul 26, 2011 at 11:59 AM, Philippe wrote:
> i believe it's because it needs to read the whole row to get to your sup
i believe it's because it needs to read the whole row to get to your super
column.
you might have to reconsider your model.
Le 26 juil. 2011 17:39, "Priyanka" a écrit :
>
> Hello All,
>
> I am doing some read tests on Cassandra on a single node.But they
> are turning up to be very slow.
> Here is
Hello All,
I am doing some read tests on Cassandra on a single node.But they
are turning up to be very slow.
Here is the data model in detail.
I am using a super column family.Cassandra has total 970 rows and each row
has 620901 super columns and each super column has 2 columns.
If I have Cassandra already running on my machine, how do I configure
sstableloader to run on a different IP (127.0.0.2). Also, does that mean in
order to use sstableloader on the same machine as an running Cassandra node,
I have to have two NIC cards?
I looked around for any info about how to co
cassandra.db.Caches
On Tue, Jul 26, 2011 at 2:11 AM, Nilabja Banerjee
wrote:
> Thank you every one it is working fine.
>
> I was watching jconsole behavior...can tell me where exactly I can find "
> RecentHitRates" :
>
> Tuning for Optimal Caching:
>
> Here they have given one example of that
On Mon, Jul 25, 2011 at 6:41 PM, aaron morton wrote:
> There are no hard and fast rules to add new nodes, but here are two
> guidelines:
>
> 1) Single node load is getting too high, rule of thumb is 300GB is probably
> too high.
What is that rule of thumb based on? I would guess that working se
The Cassandra team is pleased to announce the release of Apache Cassandra
version 0.8.2.
Cassandra is a highly scalable second-generation distributed database,
bringing together Dynamo's fully distributed design and Bigtable's
ColumnFamily-based data model. You can read more here:
http://cassand
I means the best way is that full disk server will not influence the service of
cluster and the server can be automatic come back to work after clean the disk.
Best Regards
Donna li
-邮件原件-
发件人: aaron morton [mailto:aa...@thelastpickle.com]
发送时间: 2011年7月26日 6:25
收件人: user@cassandra.apa
Thank you every one it is working fine.
I was watching jconsole behavior...can tell me where exactly I can
find " *RecentHitRates"
:
*Tuning for Optimal Caching:
Here they have given one example of that *
http://www.datastax.com/docs/0.8/operations/cache_tuning#configuring-key-and-row-caches
See the "Edward Capriolo (media6degrees) – Real World Capacity Planning:
Cassandra on Blades and Big Iron" at
http://www.datastax.com/events/cassandrasf2011/presentations
Open ended questions like this are really hard to answer. It's a lot easier for
people if you provide some context, some ide
I have only one CF with one UTF8 column and without indexes. in column
always 1 byte of data and keys is 16byte strings.
It's in the source distribution under tools/stress see the instructions in the
README file and then look at the command line help (bin/stress --help).
Cheers
-
Aaron Morton
Freelance Cassandra Developer
@aaronmorton
http://www.thelastpickle.com
On 26 Jul 2011, at 19:40, CASSAND
Actually I was wrong�C our patch will disable gosisp and thrift but
leave the process running:
Could cassandra server be normal without restart after clear the disk?
Best Regards
Donna li
-邮件原件-
发件人: Ryan King [mailto:r...@twitter.com]
发送时间: 2011年7月26日 1:53
收件人: user@cassandra
Was guessing something like a token move may have happened in the past.
Good suggestion to also kick off a major compaction. I've seen that make a big
difference even for apps that do not do deletes, but do do overwrites.
Cheers
-
Aaron Morton
Freelance Cassandra Developer
@aa
I think that Yang Yang's comment on
https://issues.apache.org/jira/browse/CASSANDRA-2495
is correct. TTL could be used to expire the history. The TTL value could
either be a configurable parameter, or part of the counter API.
On Mon, Jul 25, 2011 at 9:48 PM, Aaron Turner wrote:
> On Mon, Jul 2
Have you tried some of the ideas about reducing the memory pressure ?
How many CF's + second indexes do you have?
Cheers
-
Aaron Morton
Freelance Cassandra Developer
@aaronmorton
http://www.thelastpickle.com
On 26 Jul 2011, at 17:10, lebron james wrote:
> I have only 4GB on s
Can you guys please explain how to do capacity planning in cassandra
Hi,,
I too wanna know what this stress tool do? What is the usage of this tool...
Please explain
On Fri, Jul 22, 2011 at 6:39 PM, Jonathan Ellis wrote:
> What does nodetool ring say?
>
> On Fri, Jul 22, 2011 at 12:43 AM, Nilabja Banerjee
> wrote:
> > Hi All,
> >
> > I am following this foll
> If they are and repair has completed use node tool cleanup to remove the
> data the node is no longer responsible. See bootstrap section above.
I've seen that said a few times so allow me to correct. Cleanup is useless after
a repair. 'nodetool cleanup' removes rows the node is not responsible a
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