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From Sylvain Lebresne <sylv...@datastax.com>
Subject Re: Keyspaces on different volumes
Date Wed, 08 Jan 2014 09:59:26 GMT
I don't think Cassandra will complain if the cassandra/data/<keyspace>
directory exists when you create <keyspace>, so you can just create your
symlinks first and move on. Don't have to do the start C*, create keyspace,
stop C*, move directory dance.

Other than that, I would probably just directly mount my volumes into the
cassandra/data/<keyspace> directories directly instead of using symlinks,
but if you're probably fine with symlinks if you really prefer.

--
Sylvain




On Tue, Jan 7, 2014 at 4:05 PM, Robert Wille <rwille@fold3.com> wrote:

> The obvious (but painful) way to do that would be to create the keyspace,
> and then repeat the following for each node: shut down the node, move
> cassandra/data/<keyspace> to the other volume, create a symlink in its
> place, restart the node.
>
> Is there a better way?
>
> Robert
>
> From: Tupshin Harper <tupshin@tupshin.com>
> Reply-To: <user@cassandra.apache.org>
> Date: Tuesday, January 7, 2014 at 6:07 AM
> To: <user@cassandra.apache.org>
> Subject: Re: Keyspaces on different volumes
>
> That is a fine option and can make perfect sense if you have keyspaces
> with very different runtime characteristics.
>
> -Tupshin
> On Jan 7, 2014 7:30 AM, "Robert Wille" <rwille@fold3.com> wrote:
>
>> I’d like to have my keyspaces on different volumes, so that some can be
>> on SSD and others on spinning disk. Is such a thing possible or advisable?
>>
>

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