Re: Monitoring replication lag/latency in multi DC setup

2012-09-05 Thread Venkat Rama
Is there a specific metric you can recommend? VR On Wed, Sep 5, 2012 at 9:19 PM, Mohit Anchlia wrote: > Cassandra exposes lot of metrics through Jconsole. You might be able to > get some information from Jconsole. > > > On Wed, Sep 5, 2012 at 8:47 PM, Venkat Rama wrote: >

Secondary index read/write explanation

2012-09-05 Thread Venkat Rama
Hi All, I am a new bee to Cassandra and trying to understand how secondary indexes work. I have been going over the discussion on https://issues.apache.org/jira/browse/CASSANDRA-749 about local secondary indexes. And interesting question on http://www.mail-archive.com/user@cassandra.apache.org/ms

Re: Monitoring replication lag/latency in multi DC setup

2012-09-05 Thread Venkat Rama
erf and test the latency. > > On Wed, Sep 5, 2012 at 8:22 PM, Venkat Rama wrote: > >> Hi, >> >> We have multi DC Cassandra ring with 2 DCs setup. We use LOCAL_QUORUM >> for writes and reads. The network we have seen between the DC is sometimes >> flaky las

Monitoring replication lag/latency in multi DC setup

2012-09-05 Thread Venkat Rama
Hi, We have multi DC Cassandra ring with 2 DCs setup. We use LOCAL_QUORUM for writes and reads. The network we have seen between the DC is sometimes flaky lasting few minutes to few 10 of minutes. I wanted to know what is the best way to measure/monitor either the lag or replication latency be

Re: Adding a new node

2011-05-08 Thread Venkat Rama
detool ring say? > > Hope that helps. > > <http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/change-node-IP-address-td6197607.html> > - > Aaron Morton > Freelance Cassandra Developer > @aaronmorton > http://www.thelastpickle.com >

Adding a new node

2011-05-08 Thread Venkat Rama
Hi, I am trying to bring up a new node (with different IP) to replace a dead node on cassandra 0.7.5. Rather than bootstrap, I am copying the SSTable files to the new node(backed up files) as my data runs into several GB. Although the node successfully joins the ring, some of the ring nodes sti