Hi Aaron, we had tried invoking a full GC on Cassandra without any success. The space is still used.
Regards, Roberto On 29 March 2011 13:12, aaron morton <aa...@thelastpickle.com> wrote: > Cassandra will request a GC to free compacted SSTables if there is not > sufficient space to write an SSTable or perform a compaction. > > Aaron > > On 29 Mar 2011, at 02:15, Roberto Bentivoglio wrote: > > Thanks you again, we're going to update our enviroment. > > Regards, > Roberto > > On 28 March 2011 17:08, Ching-Cheng Chen <cc...@evidentsoftware.com>wrote: > >> >> AFAIK, setting gc_grace_period to 0 shouldn't cause this issue. In fact, >> that what I'm using now in a single node environment like yours. >> >> However, I'm using 0.7.2 with some patches. If you are still using >> 0.7.0, most likely you got hit with this bug. >> You might want to patch it or upgrade to latest release. >> >> https://issues.apache.org/jira/browse/CASSANDRA-2059 >> >> Regards, >> >> <https://issues.apache.org/jira/browse/CASSANDRA-2059> >> Chen >> Senior Developer, EvidentSoftware(Leaders in Monitoring of NoSQL & JAVA ) >> http://www.evidentsoftware.com >> >> On Mon, Mar 28, 2011 at 11:04 AM, Roberto Bentivoglio < >> roberto.bentivog...@gmail.com> wrote: >> >>> Hi Chen, >>> we've set the gc grace period of the column families to 0 as suggest in a >>> single node enviroment. >>> Can this setting cause the problem? I don't think so... >>> >>> Thanks, >>> Roberto >>> >>> On 28 March 2011 16:54, Ching-Cheng Chen <cc...@evidentsoftware.com>wrote: >>> >>>> tombstones removal also depends on your gc grace period setting. >>>> >>>> If you are pretty sure that you have proper gc grace period set and >>>> still on 0.7.0, then probably related to this bug. >>>> >>>> https://issues.apache.org/jira/browse/CASSANDRA-2059 >>>> >>>> Regards, >>>> >>>> <https://issues.apache.org/jira/browse/CASSANDRA-2059> >>>> Chen >>>> Senior Developer, EvidentSoftware(Leaders in Monitoring of NoSQL & JAVA >>>> ) >>>> http://www.evidentsoftware.com >>>> >>>> On Mon, Mar 28, 2011 at 10:40 AM, Roberto Bentivoglio < >>>> roberto.bentivog...@gmail.com> wrote: >>>> >>>>> Hi all, >>>>> we're working on a Cassandra 0.7.0 production enviroment with a store >>>>> of data near to 500 GB. >>>>> We need to periodically remove the tombstones from deleted/expired data >>>>> performing a major compaction operation through nodetool. >>>>> After invoking the compaction on a single column family we can see from >>>>> JConsole that the LiveSSTableCount is going from 15 to 3 while the >>>>> LiveDiskSpaceUsed is going from 90GB to 50GB. >>>>> The problem now is that the space on the file system is been taken from >>>>> Cassandra (I assumed from the old SSTable) and it isn't freed. We have >>>>> tried >>>>> to perform a full GC from the JConsole as described in >>>>> http://wiki.apache.org/cassandra/MemtableSSTable without any success. >>>>> The space is freed only after a database restart. >>>>> >>>>> How can we free this disk space without restart the db? >>>>> >>>>> Thanks you very much, >>>>> Roberto Bentivoglio >>>>> >>>> >>>> >>> >> > >
