Hi All,
We are upgrading cassandra from 0.6.3 to 0.7.5.We have two node in
cluster.I am bit confused how to upgrade them can you have any guide.
--
S.Ali Ahsan
Senior System Engineer
e-Business (Pvt) Ltd
49-C Jail Road, Lahore, P.O. Box 676
Lahore 54000, Pakistan
Tel: +92 (0)42 3758 7140 E
On 05/18/2011 09:28 AM, Cassa L wrote:
Hi,
I have 9 node cluster with RF-3 and using Cassandra0.70/Hector26.
Recently we are seeing lot of "UnavailableException" at the client
side. Whenever this happens, I found following pattern in Cassandra
node's log file at that given time,
* INFO [Sc
On 05/17/2011 11:57 PM, Jonathan Ellis wrote:
You've had people on this list tell you you should upgrade off such an
old release at least twice already this month.
The reason we do this is, the odds are good that the answer is
"someone else ran into that problem a year ago and it got fixed."
Per
Hi All,
I was diagnosing high CPU usage on my Cassandra 0.6.3.Then i came
across Cassandra wiki link which suggested following.
"
To lower compaction priority (thus reducing its impact on the rest of
the system, and making it take longer), add these options to
cassandra.in.sh in 0.6.3
On 05/13/2011 11:46 AM, Ali Ahsan wrote:
My cluster is unbalanced.One have 99 GB Data and other have 87 GB can
any one explain why this is happening.
[root@cassandra2 conf]# /root/cassandra/bin/nodetool -h 10.0.0.4 ring
Address Status Load
Range
My cluster is unbalanced.One have 99 GB Data and other have 87 GB can
any one explain why this is happening.
[root@cassandra2 conf]# /root/cassandra/bin/nodetool -h 10.0.0.4 ring
Address Status Load
Range Ring
It is indeed advised to use sunjdk as openjdk is a bit behind as far
as bug fixes are
concerned.
Moreover, 0.6.3 is pretty old now and we do have fixed a number of
issue related to
load spikes, so before investigating further the best advice I can
give you is to upgrade
(either to 0.6.13 if you
On 05/12/2011 04:08 PM, Ali Ahsan wrote:
Hi All
I am experience some problem with me two Cassandra node with RF=2,Both
node CPU's usage is very high,load average: 9.47, 5.72, 5.11 and this
causing my application to time out .I have xeon with 8 processor and
16 GB of Ram.and LVM setu
Hi All
I am experience some problem with me two Cassandra node with RF=2,Both
node CPU's usage is very high,load average: 9.47, 5.72, 5.11 and this
causing my application to time out .I have xeon with 8 processor and 16
GB of Ram.and LVM setup for Cassandra.How can i trace the main issue of
l
i have changed
/proc/sys/vm/pagecache from 100 to 10.
On 05/07/2011 10:36 PM, Ali Ahsan wrote:
This what free -m and vmstat show now my CPU is on 100%
[root@cassandra2 ~]# free -m
total used free sharedbuffers cached
Mem: 16043 15966
This what free -m and vmstat show now my CPU is on 100%
[root@cassandra2 ~]# free -m
total used free sharedbuffers cached
Mem: 16043 15966 76 0 4900
-/+ buffers/cache: 15061982
Swap:0
Hi That sloved my issue of GC,Now i am facing with new one
i have no swap but this process kswapd0 take up 100% cpu when there is
load on cassandra any idea why this is happening
On 05/05/2011 09:06 PM, Ali Ahsan wrote:
Thanks replying,let me disable my swap memory.
On 05/05/2011 09:01 PM
Thanks replying,let me disable my swap memory.
On 05/05/2011 09:01 PM, Jonathan Ellis wrote:
6s parnew is insane. you're probably swapping. Easiest fix is
disabling swap entirely.
P.S. 0.6.3 is ancient.
--
S.Ali Ahsan
Senior System Engineer
e-Business (Pvt) Ltd
49-C Jail Road, Lahore
Hi All
I have two cassandra node with RF=2,Cassandra start under performing i
mean red write are slow and i see following info in cassandra log.I have
centos 5.5 64 bit with 14 GB memory assigned to cassandra.I am using LVM
for cassandra.When i reboot my cassanrda every thing become normal.
, Ali Ahsan wrote:
I have added in cassandra.in.sh -Djava.rmi.server.hostname=myipaddress but
still getting same error any ideas ?
On 04/17/2011 02:24 AM, Tyler Hobbs wrote:
http://wiki.apache.org/cassandra/JmxGotchas
On Sat, Apr 16, 2011 at 12:20 PM, Ali Ahsan
wrote:
Any one have solution for
I have added in cassandra.in.sh -Djava.rmi.server.hostname=myipaddress
but still getting same error any ideas ?
On 04/17/2011 02:24 AM, Tyler Hobbs wrote:
http://wiki.apache.org/cassandra/JmxGotchas
On Sat, Apr 16, 2011 at 12:20 PM, Ali Ahsan
mailto:ali.ah...@panasiangroup.com>>
Any one have solution for this problem ?
On 04/13/2011 05:20 PM, Ali Ahsan wrote:
I am not running any firewall this physical machine not EC2,I can
telnet to port 8080
telnet 127.0.0.1 8080
Trying 127.0.0.1...
Connected to localhost.localdomain (127.0.0.1).
Escape character is
This solved we are doing some thing wrong in our application thanks for
your help.
On 04/13/2011 01:43 AM, Peter Schuller wrote:
I have two cassandra node's,If Boot strapped nodes goes down my service
remains alive,But if my non Bootstrap (master) node goes down my live site
goes down as well,
al machine using 127.0.0.1 ?
Are you running any sort of fire wall?
Check you can connect from the node to the JMX port (8080 by default) using
telnet
Aaron
On 13 Apr 2011, at 04:25, Ali Ahsan wrote:
Any one can guide me on this issue ?
On 04/12/2011 04:07 PM, Ali Ahsan wrote:
Hi All
I have m
Yes same host,I will test this with my developer team and let you know
more on it.
On 04/12/2011 11:14 PM, Héctor Izquierdo Seliva wrote:
I'm not sure. Are you runing it in the same host as the cassandra node?
--
S.Ali Ahsan
Senior System Engineer
e-Business (Pvt) Ltd
49-C Jail Road, Lah
Hi All
I have two cassandra node's,If Boot strapped nodes goes down my service
remains alive,But if my non Bootstrap (master) node goes down my live
site goes down as well,I am using cassandra 0.6.3 can any elaborate on
this problem.
On 04/12/2011 10:42 PM, Héctor Izquierdo Seliva wrote:
I forgot to mention it has been coded against 0.7.x, and I'm not sure it
will work on 0.6.x. I'll try to add support for both 0.6.x and the new
0.8.x version as soon as possible.
I think these error is because of 0.6.3 ?
xception in
Any one can guide me on this issue ?
On 04/12/2011 04:07 PM, Ali Ahsan wrote:
Hi All
I have migrated my server to centos 5.5.Every thing is up but facing a
little issue i have two cassandra nodes.
10.0.0.4 cassandra2
10.0.0.3 cassandra1
I am using open jdk with cassandra,We are faing
Thanks for sharing this info,I am getting following error,Can please be
more specific how can i run this
java -cp
/home/ali/apache-cassandra-0.6.3/lib/simple-cassandra-monitoring-1.0.jar
127.0.0.1 ks1:cf1,ks1:cf2
Exception in thread "main" java.lang.NoClassDefFoundError: 127/0/0/1
Caused by:
Please any one can
On 04/12/2011 04:07 PM, Ali Ahsan wrote:
Hi All
I have migrated my server to centos 5.5.Every thing is up but facing a
little issue i have two cassandra nodes.
10.0.0.4 cassandra2
10.0.0.3 cassandra1
I am using open jdk with cassandra,We are faing following error when
Hi All
I have migrated my server to centos 5.5.Every thing is up but facing a
little issue i have two cassandra nodes.
10.0.0.4 cassandra2
10.0.0.3 cassandra1
I am using open jdk with cassandra,We are faing following error when
using nodetool.Only on one server that is cassandra2.Hosts file
Please can any one give their comment on this
On 03/17/2011 07:02 PM, Ali Ahsan wrote:
Dear Aaron,
We are little confused about OPP token.How to calculate OPP Token? Few
of our column families have UUID as key and other's have integer as key.
Dear Aaron,
We are little confused about OPP token.How to calculate OPP Token? Few
of our column families have UUID as key and other's have integer as key.
On 03/17/2011 04:22 PM, Ali Ahsan wrote:
Below is the ouput of nodetool ring
Address Status Load
Hope that helps.
Aaron
On 17 Mar 2011, at 22:50, Ali Ahsan wrote:
Hi All
We are running Cassandra 0.6.3,We have two node's with replication
factor one and ordered partitioning.Problem we are facing at the
moment all data is being send to one Cassandra node and its filling
up quite r
Hi All
We are running Cassandra 0.6.3,We have two node's with replication
factor one and ordered partitioning.Problem we are facing at the moment
all data is being send to one Cassandra node and its filling up quite
rapidly and we are short of disk space.Unfortunately we have hardware
constr
Ok let me read it out.
On 02/06/2011 12:20 AM, Tyler Hobbs wrote:
We are planning to upgrade cassanra from 0.6.3 to 0.7 any one can
guide me to web link where i can find upgrade procedure.
NEWS.txt in an 0.7.0 package covers all the details of upgrading quite
well.
--
Tyler Hobbs
S
Hi All
We are planning to upgrade cassanra from 0.6.3 to 0.7 any one can guide
me to web link where i can find upgrade procedure.
Thanks for detailed replay
On 02/05/2011 10:01 PM, Edward Capriolo wrote:
On Sat, Feb 5, 2011 at 11:35 AM, Ali Ahsan wrote:
Thanks for replying Edward Capriolo.Will this effect cassandra ring
integrity? Another question is that will cassandra work properly after this
operation.And will it
Thanks for replying Edward Capriolo.Will this effect cassandra ring
integrity? Another question is that will cassandra work properly after
this operation.And will it be possible to restore deleted data from
backup?.
in 0.6.X
pkill `pid of cassandra`
rm -rf * /var/lib/cassandra/data//*
(star
Any update on this?
On 02/05/2011 12:53 AM, Ali Ahsan wrote:
So do we need to write a script ? or its some thing i can do as a
system admin without involving and developer.If yes please guide me in
this case.
On 02/04/2011 10:36 PM, Jonathan Ellis wrote:
In that case, you should shut down
: Re: How to delete bulk data from cassandra 0.6.3
You should use truncate instead. (Then remove the snapshot truncate creates.)
On Fri, Feb 4, 2011 at 2:05 AM, Ali Ahsan wrote:
Hi All
Is there any way i can delete column families data (not removing column
families ) from Cassandra without
Hi All
Is there any way i can delete column families data (not removing column
families ) from Cassandra without effecting ring integrity.What if i
delete some column families data in linux with rm command ?
--
S.Ali Ahsan
Senior System Engineer
e-Business (Pvt) Ltd
49-C Jail Road, Lahor
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