requests should be disabled when doing compaction?

[Yang <te...@gmail.com>]

I did a nodetool compact while the Cassandra server was serving
requests, it almost never finishes, and the service latency becomes
very long
then I terminated the traffic,  compaction finishes shortly after.

should I disable client requests to a node being compacted while I
carry out the compaction?

Thanks
Yang

Re: requests should be disabled when doing compaction?

[Jonathan Ellis <jb...@gmail.com>]

(1) You should plan enough capacity that you can handle normal
compaction load while serving requests
(1a) You can control how aggressive compaction is using the
compaction_throughput_mb_per_sec setting

(2) It is not recommended to force compaction of everything using
nodetool compact

On Thu, Sep 8, 2011 at 2:34 PM, Yang <te...@gmail.com> wrote:
> I did a nodetool compact while the Cassandra server was serving
> requests, it almost never finishes, and the service latency becomes
> very long
> then I terminated the traffic,  compaction finishes shortly after.
>
> should I disable client requests to a node being compacted while I
> carry out the compaction?
>
> Thanks
> Yang
>



-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com