Re: [zfs-discuss] Extremely long creat64 latencies on higly utilized zpools

2007-08-17 Thread Matthew Ahrens
Yaniv Aknin wrote: > When volumes approach 90% usage, and under medium/light load (zpool iostat > reports 50mb/s and 750iops reads), some creat64 system calls take over 50 > seconds to complete (observed with 'truss -D touch'). When doing manual > tests, I've seen similar times on unlink() calls (t

Re: [zfs-discuss] Extremely long creat64 latencies on higly utilized zpools

2007-08-15 Thread johansen-osdev
You might also consider taking a look at this thread: http://mail.opensolaris.org/pipermail/zfs-discuss/2007-July/041760.html Although I'm not certain, this sounds a lot like the other pool fragmentation issues. -j On Wed, Aug 15, 2007 at 01:11:40AM -0700, Yaniv Aknin wrote: > Hello friends, >

Re: [zfs-discuss] Extremely long creat64 latencies on higly utilized zpools

2007-08-15 Thread michael schuster
Yaniv, I'm adding dtrace-discuss to this email for reasons that will be obvious immediately :-) - see below Yaniv Aknin wrote: > When volumes approach 90% usage, and under medium/light load (zpool > iostat reports 50mb/s and 750iops reads), some creat64 system calls take > over 50 seconds to co

[zfs-discuss] Extremely long creat64 latencies on higly utilized zpools

2007-08-15 Thread Yaniv Aknin
Hello friends, I've recently seen a strange phenomenon with ZFS on Solaris 10u3, and was wondering if someone may have more information. The system uses several zpools, each a bit under 10T, each containing one zfs with lots and lots of small files (way too many, about 100m files and 75m direc