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From Oleksandr Shulgin <oleksandr.shul...@zalando.de>
Subject Re: Rebuilding with vnodes
Date Thu, 03 Nov 2016 08:40:44 GMT
On Wed, Nov 2, 2016 at 8:59 PM, Anubhav Kale <Anubhav.Kale@microsoft.com>
wrote:

> Hello,
>
>
>
> I am trying to rebuild a new Data Center with 50 Nodes, and expect 1 TB /
> node. Nodes are backed by SSDs, and the rebuild is happening from another
> DC in same physical region. This is with 2.1.13.
>
>
>
> I am doing this with stream_throughput=200 MB,
>

concurrent_compactors=256, compactionthroughput=0,
>

Hi,

How many CPU cores do you have per node?  In my experience unthrottled
compaction is CPU bound, but I never tried to raise the concurrency higher
than the number of core a node has.

How many actual concurrent compactions can you see from nodetool
compactionstats?

--
Alex

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