Dear all
I have a Cassandra cluster with 2 nodes.
I was trying to increase the replication factor of keyspace in Cassandra to 2.
I did the following steps:
UPDATE KEYSPACE demo WITH strategy_options = {DC1:2,DC2:2}; on both the nodes
Then I ran the nodetool repair on both the nodes
Then I ran my
please refer following url, if you'd like to know about multi-tenancy with
Cassandra.
http://wiki.apache.org/cassandra/MultiTenant
And, Hector supports multi tenant datamodel on cassandra.
https://github.com/hector-client/hector/wiki/Virtual-Keyspaces
Recently, I have disscussed about multi
More details would help, like at least the query you're using to do
the insertion and that fails, as well as the exact error message.
--
Sylvain
On Mon, Jun 11, 2012 at 2:42 AM, Georg Köster georg.koes...@gmail.com wrote:
Dear all,
I'm really excited about Cassandra's peer-to-peer
Dear all
I have a Cassandra cluster with 2 nodes. I am using NetworkTopologyStrategy.
I was trying to increase the replication factor of keyspace in Cassandra to 2.
I did the following steps:
UPDATE KEYSPACE demo WITH strategy_options = {DC1:2,DC2:2}; on both the nodes
Then I ran the nodetool
I used Pelops and now I tried Astyanax and I get no details on the value
that cassandra is analyzing - only the composite key is in the error
message. If I insert a String instead of the Long (Long.toString(...) and
Long.valueOf()) my tests work but my column size is larger of course. I can
use it
It's not possible and it's not possible to make the change.
A write to the same key in multiple CF's is written as a single log record. So
it's not possible for difference CF's to use different strategies.
The closest thing is the durable_writes KS property which turns off the commit
log
Also when I run the command
./nodetool –h ip_address ring
I found that both nodes ownership is 0 %. Please tell me how should I fix
that.
It would be a lot easier to answer you question if you showed the output from
nodetool ring.
UPDATE KEYSPACE demo WITH strategy_options =
Hi Aaron,
Can you send me some particular link related to multi tenant research
Regards
Arshad
From: aaron morton [aa...@thelastpickle.com]
Sent: Thursday, June 07, 2012 3:34 PM
To: user@cassandra.apache.org
Subject: Re: how to configure cassandra as multi tenant
Google, man.
http://wiki.apache.org/cassandra/MultiTenant
http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/about-multitenant-datamodel-td7575966.html
Hi Sasha,
Thanks for your reply. but what you send this is just to create keyspace
manually
using command prompt.how to create keyspace(Multi tenant) automatically
using cassandra API's.
Regards
Arshad
From: Sasha Dolgy [sdo...@gmail.com]
Sent: Monday, June
Well, I don't see anything special in the logs. Remove token seems to
have done its job : accorging to the logs, old stored hints have been
deleted.
If I were you, I would connect (through JMX, with jconsole) to one of the
nodes that is sending messages to an old node, and would have a look at
Dear all
I had a 2 node cluster with replication factor set to 1. Then I changed the
replication factor to 2 and brought down one node so that only 1 node was up
and running. Then I ran my Hector code on the running node. But it gave me
Unavailable Exception. I also had a Thrift code which ran
Arshad,
I used google with the following query: apache cassandra multitenant
Suggest you do the same? As was mentioned earlier, there has been a lot of
discussion about this topic for the past year -- especially on this mailing
list. If you want to use Thrift or, to make your life easier,
Hi Sasha,
one more thing by using API's how to create keyspace and column family
dynamically. write now i have to create first through the command prompt then
that keyspace and column family used in API's.
Regards
Arshad
From: Sasha Dolgy [sdo...@gmail.com]
Thanks, I understand what you are telling me. Obviously deleting the column is
the proper way to do this in Cassandra.
What I was looking for, is some convenient wrapper on top of that which will do
it for me. Here is my scenario.
I have a function that takes a record to be saved in Cassandra
Le 11 juin 2012 à 12:12, Samuel CARRIERE a écrit :
Well, I don't see anything special in the logs. Remove token seems to have
done its job : accorging to the logs, old stored hints have been deleted.
If I were you, I would connect (through JMX, with jconsole) to one of the
nodes that
I think the change log for 1.1.1 is missing CASSANDRA-4150 [1].
-- Omid
[1] https://issues.apache.org/jira/browse/CASSANDRA-4150
On Mon, Jun 4, 2012 at 9:52 PM, Sylvain Lebresne sylv...@datastax.com wrote:
The Cassandra team is pleased to announce the release of Apache Cassandra
version
finally, thanks to the groovy jmx builder, it was not that hard.
Le 11 juin 2012 à 12:12, Samuel CARRIERE a écrit :
If I were you, I would connect (through JMX, with jconsole) to one of the
nodes that is sending messages to an old node, and would have a look at these
MBean :
-
Just installed cassandra 1.1.1 and run:
root@carlo-laptop:/tmp# cassandra-cli -h localhost
Connected to: Test Cluster on localhost/9160
Welcome to Cassandra CLI version 1.1.1
Type 'help;' or '?' for help.
Type 'quit;' or 'exit;' to quit.
[default@unknown] create keyspace accounts
... with
The property file snitch isn't used by default. Did you change your
cassandra.yaml to use PropertyFileSnitch so it reads
cassandra-topology.properties?
Also the formatting in your dc property file isn't right. It should be
'ip=dc:rack'. So:
127.0.0.1=dc-test:my-notebook
On Mon, Jun 11, 2012 at
I forgot to change cassandra.yaml to use PropertyFileSnitch AND
cassandra-topology syntax was incorrect. Thanks, Nick.
I don't know why I got no error in 1.0.8 with PropertyFileSnitch in
cassandra.yaml and wrong syntax in cassandra-topology.properties.
PS: I had to change JVM_OPTS in
I don't know why I got no error in 1.0.8 with PropertyFileSnitch in
cassandra.yaml and wrong syntax in cassandra-topology.properties.
Not sure either.
PS: I had to change JVM_OPTS in /etc/cassandra/cassandra-env.sh to use 160k
instead 128k. This has not been fixed?
Still marked as
Btw. I suggest you spin up JConsole as it will give you much more detai
kon what your VM is actually doing.
On Mon, Jun 11, 2012 at 9:14 PM, Jason Tang ares.t...@gmail.com wrote:
Hi
We have some problem with Cassandra memory usage, we configure the JVM
HEAP 6G, but after runing Cassandra
See my post, I limit the HVM heap 6G, but actually Cassandra will use more
memory which is not calculated in JVM heap.
I use top to monitor total memory used by Cassandra.
=
-Xms6G -Xmx6G -Xmn1600M
2012/6/12 Jeffrey Kesselman jef...@gmail.com
Btw. I suggest you
Hi Cyril,
This may help.
http://architecturalatrocities.com/post/13918146722/implementing-column-pagination-in-cassandra
On Tue, Jun 12, 2012 at 3:18 AM, Cyril Auburtin cyril.aubur...@gmail.comwrote:
If my columns are (k1:k2 = data1), (k11:k32 = data211), (k10:k211
= data91)
U mean
Row level deletion information is included in the row level isolation.
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 5/06/2012, at 6:05 AM, Todd Burruss wrote:
I don't think I'm being clear. I just was wondering if a row delete is
Check the documentation for you client or
http://www.datastax.com/docs/1.0/dml/using_cql
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 11/06/2012, at 11:25 PM, MOHD ARSHAD SALEEM wrote:
Hi Sasha,
one more thing by using API's how
Leonid,
Are you using some client for doing these operations..?
Hector is a java client which provides APIs for adding/deleting columns to
a column family in cassandra.
I don¹t think you really need to write your wrapper in this format- you
are restricting the number of columns it can use etc.I
Hi
I found some information of this issue
And seems we can have other strategy for data access to reduce mmap usage,
in order to use less memory.
But I didn't find the document to describe the parameters for Cassandra
1.x, is it a good way to use this parameter to reduce shared memory usage
and
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