> ------------ Původní zpráva ------------ > Od: Andrew Deason <[email protected]> > Předmět: Re: [OpenAFS] Re: [OpenAFS] cache manager locked under heavy load? > Datum: 08.2.2010 02:09:49 > ---------------------------------------- > On Mon, 08 Feb 2010 00:01:03 +0100 (CET) > Alena Manova <[email protected]> wrote: > > > I am running one fileserver process. should I run more? how to get > > the optimal number? > [...] > > Instance fs, (type is fs) currently running normally. > > Auxiliary status is: file server running. > > Process last started at Sun Feb 7 04:00:05 2010 (2 proc starts) > > Command 1 is '/usr/afs/bin/fileserver' > > Command 2 is '/usr/afs/bin/volserver' > > Command 3 is '/usr/afs/bin/salvager' > > The number of threads you're running with is usually given by the -p > option to the fileserver. You are running with the default, which I > think is around 9. Try adding the argument "-p 128" (no quotes) to the > parameters passed to the fileserver, and see if it affects your problem > at all. >
ok, thanks. I changed the fileserver to be started with the option -L which means "large" and implies -p 128. however it didn't help solve my cache manager issue. I also followed the vCache performance analysis described by Jason but regardless the -stats parameter (even tried with value 1000000) I can't get better hits/misses ratio than about 50% (which is much worse than recommended 1%). how about the 'dynamic-vcaches' feature? it is enabled by default so is the -stats parameter still relevant? I tried to use the -fakestat-all parameter and it seems it can improve the ratio to 4%. but the issue persists (with same scale). currently I am running the cache manager with -dynroot -fakestat-all -volumes 256 -daemons 6 -stats 300000 and the fileserver with 128 LWPs. but the issue is still there: # cmdebug localhost Lock afs_xvcache status: (writer_waitingupgrade_waiting, upgrade_locked(pid:14367 at:5), 1 read_locks(pid:15308), 288 waiters) could the memcache help? or what else should I focus on? thanks for whatever idea, Nick. > -- > Andrew Deason > [email protected] > > _______________________________________________ > OpenAFS-info mailing list > [email protected] > https://lists.openafs.org/mailman/listinfo/openafs-info > > > _______________________________________________ OpenAFS-info mailing list [email protected] https://lists.openafs.org/mailman/listinfo/openafs-info
