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From Carl Yeksigian <c...@yeksigian.com>
Subject Re: compaction_throughput_mb_per_sec
Date Mon, 04 Jan 2016 21:14:34 GMT
This is set in the cassandra.yaml on each node independently; it doesn't
have to be same cluster-wide.

On Mon, Jan 4, 2016 at 3:59 PM, Ken Hancock <ken.hancock@schange.com> wrote:

> I was surprised the other day to discover that this was a cluster-wide
> setting.   Why does that make sense?
>
> In a heterogeneous cassandra deployment, say I have some old servers
> running spinning disks and I'm bringing on more nodes that perhaps utilize
> SSD.  I want to have different compaction throttling  on different nodes to
> minimize read impact times.
>
> I can already balance data ownership through either token allocation or
> vnode counts.
>
> Also, as I increase my node count, I technically also have to increase my
> compaction_throughput which would require a rolling restart across the
> cluster.
>
>
>

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