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From Alain RODRIGUEZ <arodr...@gmail.com>
Subject Re: moving keyspaces to another disk while Cassandra is running
Date Thu, 10 Mar 2016 11:03:27 GMT
FWIW:
http://thelastpickle.com/blog/2016/02/25/removing-a-disk-mapping-from-cassandra.html

I know it is not exactly what you want, but I believe it might be useful.

C*heers,
-----------------------
Alain Rodriguez - alain@thelastpickle.com
France

The Last Pickle - Apache Cassandra Consulting
http://www.thelastpickle.com

2016-03-09 14:20 GMT+01:00 Krzysztof Księżyk <kksiezyk@gmail.com>:

> Robert Coli <rcoli <at> eventbrite.com> writes:
>
> >
> > On Mon, Mar 7, 2016 at 2:57 AM, Krzysztof Księżyk <kksiezyk <at>
> gmail.com> wrote:I see on lsof output that even if keyspace
> > is not queried, Cassandra keeps files opened, so I guess it's not safe to
> > hotswap, but I'd like to make sure.
> >
> >
> > It is not safe for exactly this reason. Just restart your nodes.
> >
> > Were I doing this process, I would :
> >
> > 1) do initial rsync
> > 2) stop node
> > 3) do rsync again, with --delete for files which are no longer in the
> source. This is very important, or you risk resurrecting SSTables which
> have already been compacted away, which can be PERMANENTLY FATAL TO THE
> CONSISTENCY OF ALL INVOLVED DATA.
> > 4) start node
> >
> > =Rob
> >
> >
>
> Hi,
>
> Thanks for answer. I do it exactly this way.
>
> Kind regards -
> Krzysztof Ksiezyk
>

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