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From Julie <julie.su...@nextcentury.com>
Subject Re: Cassandra disk space utilization WAY higher than I would expect
Date Wed, 07 Jul 2010 18:22:38 GMT
Jonathan Ellis <jbellis <at> gmail.com> writes:

> On Wed, Jul 7, 2010 at 12:10 PM, Julie <julie.sugar <at> nextcentury.com>

wrote:
> >
> > This doesn't explain why 30 GB of data is taking up 106 GB of disk 24 hours
> > after all writes have completed.  Compactions should be complete, no?
> 
> http://wiki.apache.org/cassandra/MemtableSSTable should help.

Thank you for your response, Jonathan.  I may be misunderstanding the page you 
referred me to.  Does it say I can expect that I will have temporary periods
when 2x my existing data size will be required for disk space?  This I can plan
for.  

But is there some sort of rule of thumb that it could require 3x or 4x the data
size in disk space during digestion of the data?

Thank you again for your help!
Julie




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