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From Edward Capriolo <edlinuxg...@gmail.com>
Subject Re: How to make compaction run faster?
Date Wed, 17 Apr 2013 20:26:32 GMT
three things:
1) compaction throughput is fairly low (yaml nodetool)
2) concurrent compactions is fairly low (yaml)
3) multithreaded compaction might be off in your version

Try raising these things. Otherwise consider option 4.

4)$$$$$$$$$$$$$$$$$$$$$$$ RAID,RAM<CPU$$$$$$$$$$$$$$


On Wed, Apr 17, 2013 at 4:01 PM, Jay Svc <jaytechgeek@gmail.com> wrote:

> Hi Team,
>
>
>
> I have a high write traffic to my Cassandra cluster. I experience a very
> high number of pending compactions. As I expect higher writes, The pending
> compactions keep increasing. Even when I stop my writes it takes several
> hours to finishing pending compactions.
>
>
> My CF is configured with LCS, with sstable_size_mb=20M. My CPU is below
> 20%, JVM memory usage is between 45%-55%. I am using Cassandra 1.1.9.
>
>
> How can I increase the compaction rate so it will run bit faster to match
> my write speed?
>
>
> Your inputs are appreciated.
>
>
> Thanks,
>
> Jay
>
>

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