incubator-cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Jonathan Colby <jonathan.co...@gmail.com>
Subject Re: Deleting "old" SSTables
Date Tue, 22 Mar 2011 14:41:52 GMT
doooh.  thanks!
On Mar 22, 2011, at 3:27 PM, Jonathan Ellis wrote:

> From the next paragraph of the same wiki page:
> 
> SSTables that are obsoleted by a compaction are deleted asynchronously
> when the JVM performs a GC. You can force a GC from jconsole if
> necessary, but Cassandra will force one itself if it detects that it
> is low on space. A compaction marker is also added to obsolete
> sstables so they can be deleted on startup if the server does not
> perform a GC before being restarted.
> 
> On Tue, Mar 22, 2011 at 8:30 AM, Jonathan Colby
> <jonathan.colby@gmail.com> wrote:
>> According to the Wiki Page on compaction:  once compaction is finished, the old SSTable
files may be deleted*
>> 
>> * http://wiki.apache.org/cassandra/MemtableSSTable
>> 
>> I thought the old SSTables would be deleted automatically, but this wiki page got
me thinking otherwise.
>> 
>> Question is,  if it is true that old SSTables must be manually deleted, how can one
safely identify which SSTables can be deleted??
>> 
>> Jon
>> 
>> 
>> 
>> 
>> 
>> 
> 
> 
> 
> -- 
> Jonathan Ellis
> Project Chair, Apache Cassandra
> co-founder of DataStax, the source for professional Cassandra support
> http://www.datastax.com


Mime
View raw message