----- "Roy Sigurd Karlsbakk" <r...@karlsbakk.net> skrev: > ----- "charles" <ce...@cam.ac.uk> skrev: > > > Hi, > > > > This thread refers to Solaris 10, but it was suggested that I post > it > > here as ZFS developers may well be more likely to respond. > > > > > http://forums.sun.com/thread.jspa?threadID=5438393&messageID=10986502#10986502 > > > > Basically after about ZFS 1000 filesystem creations the creation > time > > slows down to around 4 seconds, and gets progressively worse. > > > > This is not the case for normal mkdir which creates thousands of > > directories very quickly. > > > > I wanted users home directories (60,000 of them) all to be > individual > > ZFS file systems, but there seems to be a bug/limitation due to the > > prohibitive creation time. > > Is there a chance of you running out of memory here? If ZFS runs out > of memory, it'll read indicies from disk instead of keeping them in > memory, something that can almost kill a system.
Try to monitor the disk utilisation with iostat -xd 2 or something and compare the numbers with low/high dataset count. If disk usage increases, it's likely you're down on RAM. Adding more RAM or L2ARC might help. roy -- Roy Sigurd Karlsbakk (+47) 97542685 r...@karlsbakk.net http://blogg.karlsbakk.net/ -- I all pedagogikk er det essensielt at pensum presenteres intelligibelt. Det er et elementært imperativ for alle pedagoger å unngå eksessiv anvendelse av idiomer med fremmed opprinnelse. I de fleste tilfeller eksisterer adekvate og relevante synonymer på norsk. _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
