Upgrading Cassandra cluster from 0.6.3 to 0.7.5
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 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions.
Question regarding Compaction
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 or later: -XX:+UseThreadPriorities \ -XX:ThreadPriorityPolicy=42 \ -Dcassandra.compaction.priority=1 \ http://wiki.apache.org/cassandra/PerformanceTuning After adding above in my cassandra.in.sh my high CPU usage seems to dropped very very low in fact it seem nothing is running on machine's. So here is my question do i need to run nodetool compact or not and what about noretool rapier. -- S.Ali Ahsan
Re: Question regarding Compaction
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. Personally, I don't think it's worth the time to troubleshoot before upgrading Yes true we need to upgrade ,And we are planning for this. -- S.Ali Ahsan
Re: Gossiper question
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 [ScheduledTasks:1] 2011-05-13 02:59:55,365 Gossiper.java (line 195) InetAddress /**.**.***.54 is now dead.* * INFO [ScheduledTasks:1] 2011-05-13 02:59:57,369 Gossiper.java (line 195) InetAddress /.**.***.**59 is now dead.* INFO [HintedHandoff:1] 2011-05-13 03:00:04,706 HintedHandOffManager.java (line 192) Started hinted handoff for endpoint /***.**.***.*54 * INFO [GossipStage:1] 2011-05-13 03:00:04,706 Gossiper.java (line 569) InetAddress /.**.*.54 is now UP* INFO [HintedHandoff:1] 2011-05-13 03:00:04,706 HintedHandOffManager.java (line 248) Finished hinted handoff of 0 rows to endpoint /***.**..54 INFO [HintedHandoff:1] 2011-05-13 03:00:20,601 HintedHandOffManager.java (line 192) Started hinted handoff for endpoint /***.**..59 * INFO [GossipStage:1] 2011-05-13 03:00:20,601 Gossiper.java (line 569) InetAddress /.**.*.59 is now UP* The exception occurred at 2011-05-13 03:00:00,664. I am wondering what why this dead/up pattern is occurring at Gossip. Thanks in advance, Cassa L. I am not sure do check system Load when you see this happening.If load is to High then it means CPU was not able to give time to Network I/O. -- S.Ali Ahsan
Cassandra node is not blanced Rf=2 Random Partitioner
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 133487003891811234514792661331209113407 10.0.0.4 Up 99.63 GB 89592293417191096473651402050455 |--| 10.0.0.3 Up 87.02 GB 133487003891811234514792661331209113407|--| -- 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 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions.
Re: Cassandra node is not blanced Rf=2 Random Partitioner
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 Ring 133487003891811234514792661331209113407 10.0.0.4 Up 99.63 GB 89592293417191096473651402050455 |--| 10.0.0.3 Up 87.02 GB 133487003891811234514792661331209113407|--| We are using 0.6.3 -- S.Ali Ahsan
Cassandra causing very high load on CPU's 0.6.3
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 load i have no swap and swappies also set to 0.I am running Centos 5.5 64 Bit. tpstats -- Pool NameActive Pending Completed STREAM-STAGE 0 0 0 RESPONSE-STAGE0 0 18439 ROW-READ-STAGE0 0 16235 LB-OPERATIONS 0 0 0 MESSAGE-DESERIALIZER-POOL 0 0 63673 GMFD 0 0632 LB-TARGET 0 0 0 CONSISTENCY-MANAGER 0 0 4008 ROW-MUTATION-STAGE1 1 70414 MESSAGE-STREAMING-POOL0 0 0 LOAD-BALANCER-STAGE 0 0 0 FLUSH-SORTER-POOL 0 0 0 MEMTABLE-POST-FLUSHER 0 0 32 FLUSH-WRITER-POOL 0 0 32 AE-SERVICE-STAGE 0 0 0 HINTED-HANDOFF-POOL 1 1 0 -- S.Ali Ahsan
Re: Cassandra causing very high load on CPU's 0.6.3
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 setup for Cassandra.How can i trace the main issue of load i have no swap and swappies also set to 0.I am running Centos 5.5 64 Bit. Add to this i am using openjdk not sunjdk will this be an issue ?
Re: GC for ParNew (cassandra under performance ) 0.6.3
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, 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, P.O. Box 676 Lahore 54000, Pakistan Tel: +92 (0)42 3758 7140 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions.
Re: GC for ParNew (cassandra under performance ) 0.6.3
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 0 0 root@cassandra2 ~]# vmstat procs ---memory-- ---swap-- -io --system-- -cpu-- r b swpd free buff cache si sobibo in cs us sy id wa st 1 8 0 79312 4776 92180011373211 1 0 98 1 0 On 05/07/2011 05:47 PM, Jonathan Ellis wrote: kswapd0 100% -- 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 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions.
Re: GC for ParNew (cassandra under performance ) 0.6.3
Hi All some on suggested about linux scheduler cat /sys/block/sda/queue/scheduler there are quite few of them noop [anticipatory] deadline cfq.I have changed from cfq default to anticipatory,Now problem is less for me kswapd0 take 10-50% of cpu in very short bust less then milliseconds.Also 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 76 0 4900 -/+ buffers/cache: 15061982 Swap:0 0 0 root@cassandra2 ~]# vmstat procs ---memory-- ---swap-- -io --system-- -cpu-- r b swpd free buff cache si sobibo in cs us sy id wa st 1 8 0 79312 4776 92180011373211 1 0 98 1 0 On 05/07/2011 05:47 PM, Jonathan Ellis wrote: kswapd0 100% -- 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 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions.
GC for ParNew (cassandra under performance ) 0.6.3
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. Below is some nodetoll info # /root/cassandra/bin/nodetool -h 10.0.0.4 info 89592293417191096473651402050455 Load : 43.51 GB Generation No: 1304495724 Uptime (seconds) : 114699 Heap Memory (MB) : 9944.43 / 14319.38 tpstats [root@cassandra2 cassandra]# /root/cassandra/bin/nodetool -h 10.0.0.4 tpstats Pool NameActive Pending Completed FILEUTILS-DELETE-POOL 0 0187 STREAM-STAGE 0 0 0 RESPONSE-STAGE0 0 35901940 ROW-READ-STAGE8 9 14580549 LB-OPERATIONS 0 0 0 MESSAGE-DESERIALIZER-POOL 0 0 54586854 GMFD 0 0 308503 LB-TARGET 0 0 0 CONSISTENCY-MANAGER 0 07637656 ROW-MUTATION-STAGE2 2 43329077 MESSAGE-STREAMING-POOL0 0 0 LOAD-BALANCER-STAGE 0 0 0 FLUSH-SORTER-POOL 0 0 0 MEMTABLE-POST-FLUSHER 0 0 2028 FLUSH-WRITER-POOL 0 0 2028 AE-SERVICE-STAGE 0 0 0 HINTED-HANDOFF-POOL 130 97 When i see below info cassandra start under performing and happening on both machines. INFO [GC inspection] 2011-05-05 20:39:08,617 GCInspector.java (line 110) GC for ParNew: 698 ms, 138706360 reclaimed leaving 10135848048 used; max is 15241445376 INFO [GC inspection] 2011-05-05 20:39:09,620 GCInspector.java (line 110) GC for ParNew: 496 ms, 138960224 reclaimed leaving 10135360416 used; max is 15241445376 INFO [GC inspection] 2011-05-05 20:39:10,988 GCInspector.java (line 110) GC for ParNew: 1051 ms, 137654632 reclaimed leaving 10137177208 used; max is 15241445376 INFO [GC inspection] 2011-05-05 20:39:13,370 GCInspector.java (line 110) GC for ParNew: 907 ms, 137254552 reclaimed leaving 10137977152 used; max is 15241445376 INFO [GC inspection] 2011-05-05 20:39:14,631 GCInspector.java (line 110) GC for ParNew: 635 ms, 135828080 reclaimed leaving 10140229096 used; max is 15241445376 INFO [GC inspection] 2011-05-05 20:39:16,872 GCInspector.java (line 110) GC for ParNew: 1910 ms, 137722664 reclaimed leaving 10141548552 used; max is 15241445376 INFO [GC inspection] 2011-05-05 20:39:23,463 GCInspector.java (line 110) GC for ParNew: 6341 ms, 139920392 reclaimed leaving 10141215712 used; max is 15241445376 INFO [GC inspection] 2011-05-05 20:39:25,482 GCInspector.java (line 110) GC for ParNew: 1712 ms, 139482032 reclaimed leaving 10141321232 used; max is 15241445376 -- 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 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions.
Re: GC for ParNew (cassandra under performance ) 0.6.3
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, P.O. Box 676 Lahore 54000, Pakistan Tel: +92 (0)42 3758 7140 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions.
Re: cassandra 0.6.3 error Connection refused to host: 127.0.0.1;
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 ali.ah...@panasiangroup.com mailto:ali.ah...@panasiangroup.com wrote: 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 '^]'. -- 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 tel:%2B92%20%280%2942%203758%207140 Ext. 128 Mobile: +92 (0)345 831 8769 tel:%2B92%20%280%29345%20831%208769 Fax: +92 (0)42 3758 0027 tel:%2B92%20%280%2942%203758%200027 Email: ali.ah...@panasiangroup.com mailto:ali.ah...@panasiangroup.com www.ebusiness-pg.com http://www.ebusiness-pg.com www.panasiangroup.com http://www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions. -- Tyler Hobbs Software Engineer, DataStax http://datastax.com/ Maintainer of the pycassa http://github.com/pycassa/pycassa Cassandra Python client library -- 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 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions.
Re: cassandra 0.6.3 error Connection refused to host: 127.0.0.1;
Thanks for quick reply but i am not using ec2,Its a physical machine. On 04/26/2011 12:59 PM, Sasha Dolgy wrote: on ec2, we had to change the default jmx port ... but that's with 0.7.x. instead of 8080 we opted for 9090 and that solved our problems. -sd On Tue, Apr 26, 2011 at 9:57 AM, Ali Ahsanali.ah...@panasiangroup.com 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 Ahsanali.ah...@panasiangroup.com wrote: 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 '^]'. -- 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 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions. -- Tyler Hobbs Software Engineer, DataStax Maintainer of the pycassa Cassandra Python client library -- 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 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions. -- 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 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions.
Re: cassandra 0.6.3 error Connection refused to host: 127.0.0.1;
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 '^]'. -- 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 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions.
Re: cassandra 0.6.3 error Connection refused to host: 127.0.0.1;
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 '^]'. On 04/13/2011 06:59 AM, aaron morton wrote: Can you connect from the local 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 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 is also pasted below.I please let me know how can i fix this issue. - sh nodetool -h 10.0.0.3 ring Error connecting to remote JMX agent! java.rmi.ConnectException: Connection refused to host: 127.0.0.1; nested exception is: --- sh nodetool -h 10.0.0.4 ring Address Status Load Range Ring 129069858893052904163677015069685590304 10.0.0.3 Up 10.02 GB 104465788091875410298027059042850717029 |--| 10.0.0.4 Up 9.98 GB 129069858893052904163677015069685590304 |--| Hosts file # Do not remove the following line, or various programs # that require network functionality will fail. 127.0.0.1localhost.localdomain localhost 10.0.0.4cassandra2.pringit.com #::1localhost6.localdomain6 localhost6 -- 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 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions. -- 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 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions.
Re: Cassandra node's replication factor two with random partition non Bootstrap node problem
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,I am using cassandra 0.6.3 can any elaborate on this problem. Assuming your RF is 2 (not 1), and that you are reading at consistency level ONE (not QUORUM, which would be 2 in the case of RF=2), single-node failures should be tolerated. In order for people to help you'd have to specify some more informaton. For example, your site goes down - but what is the actual error condition w.r.t. Cassandra? What is the error reported by the Cassandra client (and which client is it)? I'm not sure what you mean w.r.t. boostrap/master etc. All nodes should be entirely equal, with the exception of nodes that are marked as seed nodes. But seed nodes going down should not cause reads and writes to fail. -- 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 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions.
cassandra 0.6.3 error Connection refused to host: 127.0.0.1;
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 is also pasted below.I please let me know how can i fix this issue. - sh nodetool -h 10.0.0.3 ring Error connecting to remote JMX agent! java.rmi.ConnectException: Connection refused to host: 127.0.0.1; nested exception is: --- sh nodetool -h 10.0.0.4 ring Address Status Load Range Ring 129069858893052904163677015069685590304 10.0.0.3 Up 10.02 GB 104465788091875410298027059042850717029|--| 10.0.0.4 Up 9.98 GB 129069858893052904163677015069685590304|--| Hosts file # Do not remove the following line, or various programs # that require network functionality will fail. 127.0.0.1localhost.localdomain localhost 10.0.0.4cassandra2.pringit.com #::1localhost6.localdomain6 localhost6 -- 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 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions.
Re: cassandra 0.6.3 error Connection refused to host: 127.0.0.1;
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 using nodetool.Only on one server that is cassandra2.Hosts file is also pasted below.I please let me know how can i fix this issue. - sh nodetool -h 10.0.0.3 ring Error connecting to remote JMX agent! java.rmi.ConnectException: Connection refused to host: 127.0.0.1; nested exception is: --- sh nodetool -h 10.0.0.4 ring Address Status Load Range Ring 129069858893052904163677015069685590304 10.0.0.3 Up 10.02 GB 104465788091875410298027059042850717029|--| 10.0.0.4 Up 9.98 GB 129069858893052904163677015069685590304|--| Hosts file # Do not remove the following line, or various programs # that require network functionality will fail. 127.0.0.1localhost.localdomain localhost 10.0.0.4cassandra2.pringit.com #::1localhost6.localdomain6 localhost6 -- 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 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions.
Re: Cassandra monitoring tool
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: java.lang.ClassNotFoundException: 127.0.0.1 at java.net.URLClassLoader$1.run(URLClassLoader.java:217) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:205) at java.lang.ClassLoader.loadClass(ClassLoader.java:321) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294) at java.lang.ClassLoader.loadClass(ClassLoader.java:266) Could not find the main class: 127.0.0.1. Program will exit. OR java -jar /home/ali/apache-cassandra-0.6.3/lib/simple-cassandra-monitoring-1.0.jar localhost ks1:cf1,ks1:cf2 Failed to load Main-Class manifest attribute from /home/ali/apache-cassandra-0.6.3/lib/simple-cassandra-monitoring-1.0.jar On 04/12/2011 07:26 PM, Héctor Izquierdo Seliva wrote: Hi everyone. Looking for ways to monitor cassandra with zabbix I could not found anything that was really usable, till I found mention of a nice class by smeet. I have based my modification upon his work and now I give it back to the community. Here's the project url: http://code.google.com/p/simple-cassandra-monitoring/ It allows to get statistics for any Keyspace/ColumnFamily you want. To start it just build the jar, and launch it using as classpath your cassandra installation lib folder. The first parameter is the node host name. The second parameter is a comma separated list of KS:CF values. For example: java -cp blablabla localhost ks1:cf1,ks1:cf2. Then point curl to http://localhost:9090/ks1/cf1 and some basic stats will be displayed. You can also point to http://localhost:9090/nodeinfo to get some info about the server. If you have any suggestion or improvement you would like to see, please contact me and I will be glad to work on it. Right now it's a bit rough, but it gets the job done. Thanks for your time! -- 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 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions.
Re: Cassandra monitoring tool
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 thread main java.io.IOException: Failed to retrieve RMIServer stub: javax.naming.CommunicationException [Root exception is java.rmi.ConnectIOException: error during JRMP connection establishment; nested exception is: java.io.EOFException] at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:342) at javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:267) at com.google.code.scm.CassandraMonitoring.start(CassandraMonitoring.java:58) at com.google.code.scm.CassandraMonitoring.main(CassandraMonitoring.java:190) Caused by: javax.naming.CommunicationException [Root exception is java.rmi.ConnectIOException: error during JRMP connection establishment; nested exception is: java.io.EOFException] at com.sun.jndi.rmi.registry.RegistryContext.lookup(RegistryContext.java:118) at com.sun.jndi.toolkit.url.GenericURLContext.lookup(GenericURLContext.java:203) at javax.naming.InitialContext.lookup(InitialContext.java:409) at javax.management.remote.rmi.RMIConnector.findRMIServerJNDI(RMIConnector.java:1902) at javax.management.remote.rmi.RMIConnector.findRMIServer(RMIConnector.java:1871) at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:276) ... 3 more Caused by: java.rmi.ConnectIOException: error during JRMP connection establishment; nested exception is: java.io.EOFException at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:304) at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:202) at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:340) at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source) at com.sun.jndi.rmi.registry.RegistryContext.lookup(RegistryContext.java:114) ... 8 more Caused by: java.io.EOFException at java.io.DataInputStream.readByte(DataInputStream.java:267) at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:246) ... 12 more -- 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 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions.
Cassandra node's replication factor two with random partition non Bootstrap node problem
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.
Re: Cassandra monitoring tool
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, Lahore, P.O. Box 676 Lahore 54000, Pakistan Tel: +92 (0)42 3758 7140 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions.
Cassandra 0.6.3 ring not balance in terms of data size
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 constrain and we cannot add more hard disks.my current ring situation is that one node contain 89 GB and other have only 500 MB we are not able to sort this out why this is happening.Please give suggestion how can we solve this issue asap. -- 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 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions.
Re: Cassandra 0.6.3 ring not balance in terms of data size
Below is the ouput of nodetool ring Address Status Load Range Ring TuL8jLqs7uxLipP6 192.168.100.3 Up 89.91 GB JDtVOU0YVQ6MtBYA |--| 192.168.100.4 Up 487.41 MB TuL8jLqs7uxLipP6 |--| Reasons for using ordered partitioner because we wanted range slices and while keeping the order of the keys. On 03/17/2011 03:40 PM, aaron morton wrote: With the Order Preserving Partitioner you are responsible for balancing the rows around the cluster, http://wiki.apache.org/cassandra/Operations?highlight=%28partitioner%29#Token_selection Was there a reason for using the ordered partitioner rather than the random one? What does the output from nodetool ring look like ? You can change the token for the small node so that it takes ownership of more of the data see http://wiki.apache.org/cassandra/Operations#Moving_nodes http://wiki.apache.org/cassandra/Operations?highlight=%28partitioner%29#Moving_nodes You will need to understand the row keys you are using and pick the token appropriately. 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 rapidly and we are short of disk space.Unfortunately we have hardware constrain and we cannot add more hard disks.my current ring situation is that one node contain 89 GB and other have only 500 MB we are not able to sort this out why this is happening.Please give suggestion how can we solve this issue asap. -- 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 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com mailto:ali.ah...@panasiangroup.com www.ebusiness-pg.com http://www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions. -- 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 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions.
Re: Cassandra 0.6.3 ring not balance in terms of data size
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 Range Ring TuL8jLqs7uxLipP6 192.168.100.3 Up 89.91 GB JDtVOU0YVQ6MtBYA |--| 192.168.100.4 Up 487.41 MB TuL8jLqs7uxLipP6 |--| Reasons for using ordered partitioner because we wanted range slices and while keeping the order of the keys. On 03/17/2011 03:40 PM, aaron morton wrote: With the Order Preserving Partitioner you are responsible for balancing the rows around the cluster, http://wiki.apache.org/cassandra/Operations?highlight=%28partitioner%29#Token_selection Was there a reason for using the ordered partitioner rather than the random one? What does the output from nodetool ring look like ? You can change the token for the small node so that it takes ownership of more of the data see http://wiki.apache.org/cassandra/Operations#Moving_nodes http://wiki.apache.org/cassandra/Operations?highlight=%28partitioner%29#Moving_nodes You will need to understand the row keys you are using and pick the token appropriately. 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 rapidly and we are short of disk space.Unfortunately we have hardware constrain and we cannot add more hard disks.my current ring situation is that one node contain 89 GB and other have only 500 MB we are not able to sort this out why this is happening.Please give suggestion how can we solve this issue asap. -- 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 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com mailto:ali.ah...@panasiangroup.com www.ebusiness-pg.com http://www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions. -- 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 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email:ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions. -- 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 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions.
Re: Cassandra 0.6.3 ring not balance in terms of data size
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.
Re: How to delete bulk data from cassandra 0.6.3
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 the server before removing data files. On Fri, Feb 4, 2011 at 9:01 AM,roshandawr...@gmail.com wrote: I thought truncate() was not available before 0.7 (in 0.6.3)was it? --- Sent from BlackBerry -Original Message- From: Jonathan Ellisjbel...@gmail.com Date: Fri, 4 Feb 2011 08:58:35 To: useruser@cassandra.apache.org Reply-To: user@cassandra.apache.org Subject: 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 Ahsanali.ah...@panasiangroup.com wrote: 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, Lahore, P.O. Box 676 Lahore 54000, Pakistan Tel: +92 (0)42 3758 7140 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions. -- Jonathan Ellis Project Chair, Apache Cassandra co-founder of DataStax, the source for professional Cassandra support http://www.datastax.com -- 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 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions.
Re: How to delete bulk data from cassandra 0.6.3
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/keyspace/CF you want to delete* (start cassandra) -- 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 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions.
Re: How to delete bulk data from cassandra 0.6.3
Thanks for detailed replay On 02/05/2011 10:01 PM, Edward Capriolo wrote: On Sat, Feb 5, 2011 at 11:35 AM, Ali Ahsanali.ah...@panasiangroup.com 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 be possible to restore deleted data from backup?. in 0.6.X pkill `pid of cassandra` rm -rf * /var/lib/cassandra/data/keyspace/CF you want to delete* (start cassandra) -- 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 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions. I am not sure what you mean by data integrity. In short, when Cassandra starts up it searches it's data directories and loads up the data, index, bloom filters, and saved caches it finds. Unless the files are corrupt it will happily load up what it finds. Restores are done by the process your described , stop server, restore files, start server. -- 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 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions.
How to upgrade cassandra from 0.6.3 to 0.7
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.
Re: How to upgrade cassandra from 0.6.3 to 0.7
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 Software Engineer, DataStax http://datastax.com/ Maintainer of the pycassa http://github.com/pycassa/pycassa Cassandra Python client library
How to delete bulk data from cassandra 0.6.3
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, Lahore, P.O. Box 676 Lahore 54000, Pakistan Tel: +92 (0)42 3758 7140 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions.
Re: How to delete bulk data from cassandra 0.6.3
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 the server before removing data files. On Fri, Feb 4, 2011 at 9:01 AM,roshandawr...@gmail.com wrote: I thought truncate() was not available before 0.7 (in 0.6.3)was it? --- Sent from BlackBerry -Original Message- From: Jonathan Ellisjbel...@gmail.com Date: Fri, 4 Feb 2011 08:58:35 To: useruser@cassandra.apache.org Reply-To: user@cassandra.apache.org Subject: 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 Ahsanali.ah...@panasiangroup.com wrote: 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, Lahore, P.O. Box 676 Lahore 54000, Pakistan Tel: +92 (0)42 3758 7140 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions. -- Jonathan Ellis Project Chair, Apache Cassandra co-founder of DataStax, the source for professional Cassandra support http://www.datastax.com -- 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 Ext. 128 Mobile: +92 (0)345 831 8769 Fax: +92 (0)42 3758 0027 Email: ali.ah...@panasiangroup.com www.ebusiness-pg.com www.panasiangroup.com Confidentiality: This e-mail and any attachments may be confidential and/or privileged. If you are not a named recipient, please notify the sender immediately and do not disclose the contents to another person use it for any purpose or store or copy the information in any medium. Internet communications cannot be guaranteed to be timely, secure, error or virus-free. We do not accept liability for any errors or omissions.
