Vincent Fox <vbfox@xxxxxxxxxxx> wrote: > Several people have asked for the IDR number from Sun that gave> us the performance optimizations we needed.>> Management says the agreement for the IDR we got prohibits this. I just opened a case at our Sun Representative so we hope to get this zfs patch as well.filebench varmail leaves us with > 1,5 seconds (!) for an fsync(), which is really a big performance hit. <semi off-topic> As a side note:I had some fun with dtrace visualizing read and write access to our zpool mirror (ZFS mirror pool) on our mail server, consisting of two fiber channel RAID devices. You see that writes are nearly sequential (due to ZFS) and reads are random i/o with some hot spots. Sure, you don't have the effect of memory caching (ARC) included.This zpool is used for IMAP storage, queue spool and log files. All filesystems are compressed. You may find the animated GIF (be warned, it is 5 MB in size) in my little blog: http://southbrain.com/south/ </semi off-topic> Pascal Gienger-- Rechenzentrum Universität KonstanzComputing Center University of Constance----Cyrus Home Page: http://cyrusimap.web.cmu.edu/Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twikiList Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
