I've half inherited Cassandra administration on a two DC cluster with 8
nodes (4 in each DC).
We've just successfully completed the upgrade to 2.1.6
On completion of upgradesstables the only remaining "jb" sstable was in
the System keyspace for NodeIdInfo. I notice th
Hi community,
during my tests i had several OOM crashes.
Getting some hints to find the problem would be nice.
First cassandra crashes after about 45 min insert test script.
During the following tests time to OOM was shorter until it started to crash
even in "idle" mode.
Here
Is there anywhere the training on cassandra is available in bamgalore, India
Hi Guys,
Can you please give me the best example of creating index on a column
family. As I am completely new to this, Can you please give me a simple and
good example.
where can i get that. Can you please help me out
On Wed, Jul 20, 2011 at 3:39 PM, Sasha Dolgy wrote:
> Examples exist in the conf directory of the distribution...
> On Jul 20, 2011 11:48 AM, "CASSANDRA learner"
> wrote:
> > Hi Guys,
> >
> > Can you please
Hi Guys,
When we talk about cassandra, any how we connect it to cloud. I dont
understand how it is connected to cloud. Whats this Cassandra Cloud.
.
> On Jul 21, 2011 8:02 AM, "samal" wrote:
> > As per my knowledge, there is not such expert training available in India
> as
> > of now.
> > As Sameer said there is enough online material available from where you
> can
> > learn.I have been playin
ble.
>
> Memtable is memory representation of data, which is on flush to create
> SSTable on disk.
>
> This is the location where SSTable is stored
> https://github.com/apache/cassandra/blob/trunk/conf/cassandra.yaml#L71
>
>
> Where as Commitlog which is back up (log) for memta
sstable are getting created on disk, then where and
>> when these memtables are coming into picture
>
>
> Commitlog is append only file which record write sequentially, more[2], can
> be thought as check sum file, which to used to recalculate data for
> memtables in case of cra
Thanks Aaron and samal for your quick response. Its going to be helpful
On Thu, Jul 21, 2011 at 4:15 PM, aaron morton wrote:
> Try the project wiki here
> http://wiki.apache.org/cassandra/ArchitectureOverview or the my own blog
> here
> http://thelastpickle.com/2011/04/28/Forces-
n [49] retried 10 times - error inserting key 049
> > ((UnavailableException))
> >
> > Operation [7] retried 10 times - error inserting key 007
> > ((UnavailableException))
> >
> > Operation [6] retried 10 times - error inserting key 006
> > ((Unav
Can you guys please explain how to do capacity planning in cassandra
y to do so.
> Thank you.
>
> the output of my query will be (suppose if i do for supercol1)
> rowkey1,T,C
> rowkey2,A,A
>
>
>
> --
> View this message in context:
> http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Slow-Reads-tp6622680p6623091.html
> Sent from the cassandra-u...@incubator.apache.org mailing list archive at
> Nabble.com.
>
Hi,
My Question is regarding security.
The data will be written in the disks in strings right! then how come the
data is secured, Is it not secured ???
Hi,
Can we store images , java objects, files in cassandra, if so , how
Please let me know this as i need it urgently...
Hi,
I am having one doubt regarding reads. The data will be stored in
commitlog,memtable,sstables right.. While reading the data may be available
in all the three right, then from where the reads happens,, form commit log?
or from Memtable ? or from SSTables.. Please explain friends
Thnks
Thanks for the response Oliver,
Can you please let me know where can i find an example for storing images
and files. I could not able to find one in tht link. Please let me know
On Wed, Jul 27, 2011 at 1:48 PM, Oliver Dungey wrote:
> You can store anything you like in Cassandra. The type
Hiii,
Can any one pleaze send me any sample application which is (.war)
implemented in java/jsp and cassandra db (Tomcat)
H,,
I was running cassandra in my mac and after some time the machine got to
sleep mode. Now after the machine is On. I tried to kill the process of
cassandra. But i could not able to do that as i could not able to find out
the process id. theres no process there when i pinged PS command in
Thnks for the reply Nila
When i did PS command, I could not able to find any process related to
cassandra. Thts the problem..
On Wed, Aug 3, 2011 at 4:12 PM, Benoit Perroud wrote:
> Seems like you have already a Cassandra instance running, so the second
> instance cannot open the sam
thub.com/rantav/hector/
> You should find what you are looking for there.
> If you are looking for a tomcat (and .war) example, you should send an
> email to the tomcat mailing list.
>
>
> 2011/8/3 CASSANDRA learner :
> > Hiii,
> >
> > Can any one pleaze send me any
Hi,
Thnks for the info
On Wed, Aug 3, 2011 at 4:03 PM, samal wrote:
> I don't know much about this, may help you..
>
> http://www.codefreun.de/apolloUI/
> http://www.codefreun.de/apollo/
>
>
>
> On Wed, Aug 3, 2011 at 3:36 PM, CASSANDRA learner <
> cassandra
As per subject, Please explain me what is the significance of
java_pidxxx.hprof
Can you please gimme an example on this using hector client
On Thu, Aug 4, 2011 at 7:18 AM, Boris Yen wrote:
> It seems to me that your column name consists of two components. If you
> have the luxury to upgrade your cassandra to 0.8.1+, I think you can think
> about using the compo
Hi Every One,
Actually I was using cassandra long time back and when i tried today, I am
getting a problem from eclipse. When i am trying to run a basic hector
(java) example, I am getting an exception
me.prettyprint.hector.api.exceptions.HectorException: All host pools marked
down. Retry burden
failure,
> ie with network (AWS), it will retry and add it back into the pool.
>
> Ben
>
> On 11 October 2011 11:09, CASSANDRA learner
> wrote:
> > Hi Every One,
> >
> > Actually I was using cassandra long time back and when i tried today, I
> am
> >
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