Re: How to get rid of stale info in gossip

2014-08-04 Thread Rahul Neelakantan
It no longer shows up, but I will definitely investigate that option. What exactly does it do? Rahul Neelakantan > On Aug 4, 2014, at 7:49 PM, Patricia Gorla wrote: > > Rahul, > > If the removed node is still showing up in gossip state, you can remove it > with 'unsafeAssassinate' via a JMX

Re: Changes in the Metrics MBean

2014-08-04 Thread Otis Gospodnetic
Hi, On Tue, Aug 5, 2014 at 1:37 AM, Patricia Gorla wrote: > Bhavishya, > > All metrics that Cassandra emits are segmented by host name. For a > cluster-wide view, you will need a separate metrics reporter such as > OpsCenter or Riemann. > Or SPM for Cassandra: http://blog.sematext.com/2014/06/0

Re: How to get rid of stale info in gossip

2014-08-04 Thread Patricia Gorla
Rahul, If the removed node is still showing up in gossip state, you can remove it with 'unsafeAssassinate' via a JMX tool such as jconsole or jmxterm. On Fri, Jul 25, 2014 at 6:10 AM, Rahul Neelakantan wrote: > Yes, and this is a really old version of casandra 1.0.8. > > > Rahul Neelakantan >

Re: Changes in the Metrics MBean

2014-08-04 Thread Patricia Gorla
Bhavishya, All metrics that Cassandra emits are segmented by host name. For a cluster-wide view, you will need a separate metrics reporter such as OpsCenter or Riemann. See http://thelastpickle.com/blog/2013/11/22/4-hours-with-riemann.html for more information. Thanks, On Thu, Jul 31, 2014 at

Re: data type is object when metric instrument using Gauge?

2014-08-04 Thread Patricia Gorla
Mike, What metrics reporter are you using? How are you attempting to access the metric? On Sat, Aug 2, 2014 at 7:30 AM, mike wrote: > Dear All > > We are trying to monitor Cassandra using JMX. The monitoring tool we are > using works fine for meters, However, if the metrcis are collected us

Re: Node bootstrap

2014-08-04 Thread Patricia Gorla
Ruchir, What exactly are you seeing in the logs? Are you running major compactions on the new bootstrapping node? With respect to the seed list, it is generally advisable to use 3 seed nodes per AZ / DC. Cheers, On Mon, Aug 4, 2014 at 11:41 AM, Ruchir Jha wrote: > I am trying to bootstrap th

Re: Reasonable range for the max number of tables?

2014-08-04 Thread Jack Krupansky
Read https://issues.apache.org/jira/browse/CASSANDRA-5935, especially the part about “having more than dozens or hundreds of tables defined is almost certainly a Bad Idea”. Either way, try a POC that simply creates your 720 tables and see what happens. And let us know how well it works, and whe

Re: Reasonable range for the max number of tables?

2014-08-04 Thread Robert Coli
On Mon, Aug 4, 2014 at 1:35 PM, Kevin Burton wrote: > What are the bottlenecks here ? Is this an HDD issue because we're > running them on SSD. I agree that that would be significant on HDD ... > Heap consumption. There are probably some JIRA tickets touching on the memory consumption of large

Re: Reasonable range for the max number of tables?

2014-08-04 Thread Kevin Burton
> This means I can do things like easily drop older tables if I run out of >> disk space. It also means that I can fadvise the most recent tables and >> force them into table cache. >> > > If you have to use fadvise to do this, you are almost certainly Doing It > Wrong. > possibly.. fincore is al

Re: Reasonable range for the max number of tables?

2014-08-04 Thread Robert Coli
On Mon, Aug 4, 2014 at 12:42 PM, Kevin Burton wrote: > What's a reasonable range for the max number of tables? We have an > append-only table system and I've been thinking of moving them to using > hourly / partitioned tables. > "Low Numbers of Hundreds" > This means I can do things like easi

moving older tables from SSD to HDD?

2014-08-04 Thread Kevin Burton
Is it possible to take older tables, which are immutable, and move them from SSD to HDD? We lower the SLA on older data so keeping it on HDD is totally fine. MySQL can *sort* of do this… and I think that Cassandra could if it was handled properly. Kevin -- Founder/CEO Spinn3r.com Location: *S

Reasonable range for the max number of tables?

2014-08-04 Thread Kevin Burton
What's a reasonable range for the max number of tables? We have an append-only table system and I've been thinking of moving them to using hourly / partitioned tables. This means I can do things like easily drop older tables if I run out of disk space. It also means that I can fadvise the most r

Node bootstrap

2014-08-04 Thread Ruchir Jha
I am trying to bootstrap the thirteenth node in a 12 node cluster where the average data size per node is about 2.1 TB. The bootstrap streaming has been going on for 2 days now, and the disk size on the new node is already above 4 TB and still going. Is this because the new node is running major co

Re: Occasional read timeouts seen during row scans

2014-08-04 Thread Clint Kelly
Hi all, 1. I saw this issue in an integration test with a single CassandraDaemon running, so I don't think it was a time synchronization issue. 2. I did not look in the log for garbage collection issues, but I was able to reproduce this 100% deterministically, so I think it was an issue having to

RE: question about commitlog segments and memlocking

2014-08-04 Thread DE VITO Dominique
Robert, Thanks for your explanation! Regards, Dominique De : Robert Coli [mailto:rc...@eventbrite.com] Envoyé : vendredi 1 août 2014 19:50 À : user@cassandra.apache.org Objet : Re: question about commitlog segments and memlocking On Fri, Aug 1, 2014 at 2:53 AM, DE VITO Dominique mailto:dominiq

Re: adding more nodes into the cluster

2014-08-04 Thread Akshay Ballarpure
Is there any good documentation for multi node clustering ? Thanks & Regards Akshay Ballarpure Tata Consultancy Services Cell:- 9985084075 Mailto: akshay.ballarp...@tcs.com Website: http://www.tcs.com Experience certainty. IT Services

[RELEASE CANDIDATE] Apache Cassandra 2.1.0-rc5 released

2014-08-04 Thread Sylvain Lebresne
The Cassandra team is pleased to announce the release of the fifth release candidate for the future Apache Cassandra 2.1.0. If all goes well this candidate will become the final 2.1.0 but until then, it should not be considered for production use. We'd appreciate testing and let us know if you enc