decommission mode with background compactors running

[Cogumelos Maravilha <co...@sapo.pt>]

Hi list,

I've decommission a node but in the background with nodetool status I've
checked and there was 4 compactors running and simultaneously the
SSTables sent to other nodes. Is this safe or we should disable all
background process before decommission like:

nodetool disableautocompaction
nodetool stop COMPACTION
nodetool stop VALIDATION
nodetool stop INDEX_BUILD
nodetool stop VERIFY
nodetool stop SCRUB
nodetool stop CLEANUP

Thanks in advance


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Re: decommission mode with background compactors running

[Jeff Jirsa <jj...@gmail.com>]

Streaming will grab a reference to the sstables so even if compacted they won’t be deleted until streamed - it’s safe as-is in terms of correctness, but may cause a temporary increase in disk usage as new writes happen and sstables are compacted together but old data files can’t be removed.



-- 
Jeff Jirsa


> On Oct 4, 2017, at 8:04 AM, Cogumelos Maravilha <co...@sapo.pt> wrote:
> 
> Hi list,
> 
> I've decommission a node but in the background with nodetool status I've
> checked and there was 4 compactors running and simultaneously the
> SSTables sent to other nodes. Is this safe or we should disable all
> background process before decommission like:
> 
> nodetool disableautocompaction
> nodetool stop COMPACTION
> nodetool stop VALIDATION
> nodetool stop INDEX_BUILD
> nodetool stop VERIFY
> nodetool stop SCRUB
> nodetool stop CLEANUP
> 
> Thanks in advance
> 
> 
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