Hi Volker, so i looked fort he brlock.tdb file and its local on each node. I added "posix locking = no" and "locking = no". I think it will run now better. I again a strace file to the server. What do you think?
http://dev.kupper-computer.com/intern/smbd_no_locking.txt I also added fileid:algorithm = fsname vfs objects = fileid for gfs2 whats better fsid or fileid? Thanks Sven -----Ursprüngliche Nachricht----- Von: Volker Lendecke [mailto:[email protected]] Gesendet: Dienstag, 27. November 2012 17:05 An: Vogel, Sven Cc: [email protected] Betreff: Re: [Samba] CTDB / Samba / GFS2 - Performance - with Picture Link On Tue, Nov 27, 2012 at 03:50:40PM +0000, Vogel, Sven wrote: > Hi Volker, > > thanks for the fast reply. So used the strace command. I am not so a > strace specialist but is it possible that the problem are the many > polls?` > > 12513 15:33:24.593065 poll([{fd=9, events=POLLIN|POLLHUP}, {fd=7, > events=POLLIN|POLLHUP}, {fd=40, events=POLLIN|POLLHUP}, {fd=32, > events=POLLIN|POLLHUP}, {fd=34, events=POLLIN|POLLHUP}], 5, 4436) = 1 > ([{fd=32, revents=POLLIN}]) <0.002497> > 12513 15:33:24.595615 read(32, "\0\0\0T", 4) = 4 <0.000017> > > i added a link to the strace. I dont see which syscalls take long. > There are such many syscalls in any second so i dont know whats > normal. :-| > > http://dev.kupper-computer.com/intern/smbd.txt > > Did you have any idea? One question -- do you have your brlock.tdb on gfs? If so, move them to a local file system, they will be taken care of by ctdb. Your fcntl calls on that seem slow. Also, you might want to try "posix locking = no". There is a call at timestamp 15:32:47.383963, 1.9 seconds to find out whether a range is locked. That shows that at this point in time GFS was busy regarding fcntl locks. Also, your network or your client seems to have a problem. For example at timestamp 15:32:51.837717 we are waiting 30 milliseconds for a new request from the client. This is very long for a client continuously trying to write. Volker -- SerNet GmbH, Bahnhofsallee 1b, 37081 Göttingen phone: +49-551-370000-0, fax: +49-551-370000-9 AG Göttingen, HRB 2816, GF: Dr. Johannes Loxen http://www.sernet.de, mailto:[email protected] -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/options/samba
