That's true. However, all CL headers are cached in clHeaders and in most cases, CL headers only need to be read, not written.
Jun IBM Almaden Research Center K55/B1, 650 Harry Road, San Jose, CA 95120-6099 [email protected] Jonathan Ellis <[email protected]> wrote on 09/28/2009 08:25:32 PM: > [image removed] > > Re: commit logs are not deleted > > Jonathan Ellis > > to: > > cassandra-user > > 09/28/2009 08:26 PM > > Please respond to cassandra-user > > > Right, but the corollary is that then you have to scan all the > commitlog segment headers when flushing an empty memtable. I think > the cure is potentially worse than the disease there. > > On Mon, Sep 28, 2009 at 10:21 PM, Jun Rao <[email protected]> wrote: > > A solution to this problem is to still call discardCompletedSegments() when > > flushing an empty memtable. > > > > Jun > > IBM Almaden Research Center > > K55/B1, 650 Harry Road, San Jose, CA 95120-6099 > > > > [email protected] > > > > > > Igor Katkov <[email protected]> wrote on 09/28/2009 04:32:06 PM: > > > >> [image removed] > >> > >> Re: commit logs are not deleted > >> > >> Igor Katkov > >> > >> to: > >> > >> cassandra-user > >> > >> 09/28/2009 04:33 PM > >> > >> Please respond to cassandra-user > > > >> > >> Excellent! Many thanks. > >> > >> It works, but there is a minor thing: > >> the very first created commit log segment does not get deleted. > >> Log if filled with lines like > >> Not safe to delete commit log d:/cassandra-4/data/commitlog > >> \CommitLog-1254177667321.log; dirty is 1, > >> > > > >> On Mon, Sep 28, 2009 at 5:21 PM, Jonathan Ellis <[email protected]> wrote: > >> I have a fix now at > >> https://issues.apache.org/jira/browse/CASSANDRA-459 -- only applies to > >> current trunk. When Jun finishes reviewing I will backport to 0.4. > >> > >> Sorry for the wait, > >> > >> -Jonathan > >> > >> On Mon, Sep 28, 2009 at 2:40 PM, Igor Katkov <[email protected]> wrote: > >> > Does anyone else has the same problem with 0.4? > >> > As far as I know Digg and Rackspace are biggest adopters of Cassandra. > >> > They > >> > must be running 0.3 then. > >> > > >> > > >> > On Sun, Sep 27, 2009 at 12:20 PM, Igor Katkov <[email protected]> wrote: > >> >> > >> >> full log is here (new) > >> >> http://www.katkovonline.com/cassandra-log.zip > >> >> > >> >> On Sun, Sep 27, 2009 at 12:18 PM, Igor Katkov <[email protected]> > >> >> wrote: > >> >>> > >> >>> There is no log lines with "column family 1" > >> >>> There are only "column family 0" > >> >>> > >> >>> On Sun, Sep 27, 2009 at 12:02 PM, Jonathan Ellis <[email protected]> > >> >>> wrote: > >> >>>> > >> >>>> we're looking for "column family 1" > >> >>>> > >> > > >> >
