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From Sean Bridges <sean.brid...@gmail.com>
Subject Re: using more than 50% of disk space
Date Thu, 27 May 2010 19:23:17 GMT
But doesn't having multiple similarly sized column families mean in-node
compaction does not require 50% of disk?  Looking at compaction manager,
only 1 thread is doing a compaction, so we only need enough free disk space
to compact the largest column family.

Sean

On Thu, May 27, 2010 at 12:00 AM, gabriele renzi <rff.rff@gmail.com> wrote:

> On Wed, May 26, 2010 at 8:00 PM, Sean Bridges <sean.bridges@gmail.com>
> wrote:
> > So after CASSANDRA-579, anti compaction won't be done on the source node,
> > and we can use more than 50% of the disk space if we use multiple column
> > families?
>
> Sorry if I misunderstand, but #579 seems to only solve half of your
> question,
> I believe the first part of your email stays valid (as in: in-node
> compaction causes disk usage to double anyway in worst case).
>
> CASSANDRA-1041 may also be relevant (also includes mini-discussion on
> local data partitioning).
>

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