Neil Perrin writes:
Joe Little wrote:
On Nov 16, 2007 9:13 PM, Neil Perrin [EMAIL PROTECTED] wrote:
Joe,
I don't think adding a slog helped in this case. In fact I
believe it made performance worse. Previously the ZIL would be
spread out over all devices but now all
Roch - PAE wrote:
Neil Perrin writes:
Joe Little wrote:
On Nov 16, 2007 9:13 PM, Neil Perrin [EMAIL PROTECTED] wrote:
Joe,
I don't think adding a slog helped in this case. In fact I
believe it made performance worse. Previously the ZIL would be
spread out over
one more thing...
Joe Little wrote:
I have historically noticed that in ZFS, when ever there is a heavy
writer to a pool via NFS, the reads can held back (basically paused).
An example is a RAID10 pool of 6 disks, whereby a directory of files
including some large 100+MB in size being written
On Nov 18, 2007 1:44 PM, Richard Elling [EMAIL PROTECTED] wrote:
one more thing...
Joe Little wrote:
I have historically noticed that in ZFS, when ever there is a heavy
writer to a pool via NFS, the reads can held back (basically paused).
An example is a RAID10 pool of 6 disks, whereby a
On Nov 16, 2007 10:41 PM, Neil Perrin [EMAIL PROTECTED] wrote:
Joe Little wrote:
On Nov 16, 2007 9:13 PM, Neil Perrin [EMAIL PROTECTED] wrote:
Joe,
I don't think adding a slog helped in this case. In fact I
believe it made performance worse. Previously the ZIL would be
spread out
I have historically noticed that in ZFS, when ever there is a heavy
writer to a pool via NFS, the reads can held back (basically paused).
An example is a RAID10 pool of 6 disks, whereby a directory of files
including some large 100+MB in size being written can cause other
clients over NFS to pause
Joe,
I don't think adding a slog helped in this case. In fact I
believe it made performance worse. Previously the ZIL would be
spread out over all devices but now all synchronous traffic
is directed at one device (and everything is synchronous in NFS).
Mind you 15MB/s seems a bit on the slow
On Nov 16, 2007 9:13 PM, Neil Perrin [EMAIL PROTECTED] wrote:
Joe,
I don't think adding a slog helped in this case. In fact I
believe it made performance worse. Previously the ZIL would be
spread out over all devices but now all synchronous traffic
is directed at one device (and everything
On Nov 16, 2007 9:17 PM, Joe Little [EMAIL PROTECTED] wrote:
On Nov 16, 2007 9:13 PM, Neil Perrin [EMAIL PROTECTED] wrote:
Joe,
I don't think adding a slog helped in this case. In fact I
believe it made performance worse. Previously the ZIL would be
spread out over all devices but now
