Re: [zfs-discuss] Very bad ZFS write performance. Ok Read.

2011-02-16 Thread Richard Elling
On Feb 15, 2011, at 11:26 PM, Khushil Dep wrote: Could you not also pin process' to cores, preventing switching should help too? I've done this for performance reasons before on a 24 core Linux box Yes. More importantly, you could send interrupts to a processor set. There are many ways to

Re: [zfs-discuss] Very bad ZFS write performance. Ok Read.

2011-02-15 Thread ian W
Thanks.. given this box runs 18 hours a day and is idle for maybe 17.5 hrs of that, I'd rather have the best power management I can... I would have loved to have upgraded to a i3 or even SB but the solaris 11 express support for both is marginal. (h55 chipset issues, no sandybridge support at

Re: [zfs-discuss] Very bad ZFS write performance. Ok Read.

2011-02-15 Thread Richard Elling
On Feb 15, 2011, at 7:46 PM, ian W wrote: Thanks.. given this box runs 18 hours a day and is idle for maybe 17.5 hrs of that, I'd rather have the best power management I can... I would have loved to have upgraded to a i3 or even SB but the solaris 11 express support for both is

Re: [zfs-discuss] Very bad ZFS write performance. Ok Read.

2011-02-15 Thread Khushil Dep
Could you not also pin process' to cores, preventing switching should help too? I've done this for performance reasons before on a 24 core Linux box Sent from my HTC Desire On 16 Feb 2011 05:12, Richard Elling richard.ell...@gmail.com wrote: On Feb 15, 2011, at 7:46 PM, ian W wrote: Thanks..

Re: [zfs-discuss] Very bad ZFS write performance. Ok Read.

2011-02-14 Thread ian W
Thanks for the responses.. I found the issue. It was due to power management, and a probably bug with event driven power management states, changing cpupm enable to cpupm enable poll-mode in /etc/power.conf fixed the issue for me. back up to 110MB/sec+ now.. -- This message posted from

Re: [zfs-discuss] Very bad ZFS write performance. Ok Read.

2011-02-14 Thread Krunal Desai
On Sat, Feb 12, 2011 at 3:14 AM, ian W dropbears...@yahoo.com.au wrote: Thanks for the responses.. I found the issue. It was due to power management, and a probably bug with event driven power management states, changing cpupm enable to cpupm enable poll-mode in /etc/power.conf fixed

Re: [zfs-discuss] Very bad ZFS write performance. Ok Read.

2011-02-14 Thread ian W
Hello my power.conf is as follows; any recommendations for improvement? device-dependency-property removable-media /dev/fb autopm enable autoS3 enable cpu-threshold 1s # Auto-Shutdown Idle(min) Start/Finish(hh:mm) Behavior autoshutdown 30 0:00 0:00 noshutdown S3-support enable

Re: [zfs-discuss] Very bad ZFS write performance. Ok Read.

2011-02-14 Thread Richard Elling
On Feb 14, 2011, at 4:49 PM, ian W wrote: Hello my power.conf is as follows; any recommendations for improvement? For best performance, disable power management. For certain processors and BIOSes, some combinations of power management (below the OS) are also known to be toxic. At Nexenta,

Re: [zfs-discuss] Very bad ZFS write performance. Ok Read.

2011-02-12 Thread Edward Ned Harvey
From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- boun...@opensolaris.org] On Behalf Of Edward Ned Harvey What does zpool status tell you? Also, zpool iostat 5' ___ zfs-discuss mailing list zfs-discuss@opensolaris.org

Re: [zfs-discuss] Very bad ZFS write performance. Ok Read.

2011-02-12 Thread Roy Sigurd Karlsbakk
What does zpool status tell you? Also, zpool iostat 5' or even iostat -xn Vennlige hilsener / Best regards 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

Re: [zfs-discuss] Very bad ZFS write performance. Ok Read.

2011-02-12 Thread Roy Sigurd Karlsbakk
From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- boun...@opensolaris.org] On Behalf Of Edward Ned Harvey What does zpool status tell you? Also, zpool iostat 5' Sorry - check iostat -en Vennlige hilsener / Best regards roy -- Roy Sigurd Karlsbakk (+47) 97542685

Re: [zfs-discuss] Very bad ZFS write performance. Ok Read.

2011-02-11 Thread Markus Kovero
I noticed recently that write rate has dropped off and through testing now I am getting 35MB/sec writes. The pool is around 50-60% full. I am getting a CONSTANT 30-35% kernel cpu utilisation, even if the machine is idle. I do not know if this was the case when the write performance was

Re: [zfs-discuss] Very bad ZFS write performance. Ok Read.

2011-02-11 Thread Edward Ned Harvey
From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- boun...@opensolaris.org] On Behalf Of Markus Kovero I noticed recently that write rate has dropped off and through testing now I am getting 35MB/sec writes. The pool is around 50-60% full. Hi, do you have your zfs prefetch

Re: [zfs-discuss] Very bad ZFS write performance. Ok Read.

2011-02-11 Thread Edward Ned Harvey
From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- boun...@opensolaris.org] On Behalf Of ian W Hope you can still help here. Solaris 11 Express. x86 platform E6600 with 6GB of RAM I have a fairly new S11E box Im using as a file server. 3x1.5TB HDD's in a raidz pool. Just so

Re: [zfs-discuss] Very bad ZFS write performance. Ok Read.

2011-02-11 Thread Markus Kovero
On the other hand, that will only matter for reads. And the complaint is writes. Actually, it also affects writes. (due checksum reads?) Yours Markus Kovero ___ zfs-discuss mailing list zfs-discuss@opensolaris.org

[zfs-discuss] Very bad ZFS write performance. Ok Read.

2011-02-10 Thread ian W
Hi All. Hope you can still help here. Solaris 11 Express. x86 platform E6600 with 6GB of RAM I have a fairly new S11E box Im using as a file server. 3x1.5TB HDD's in a raidz pool. When I first set it up I was getting 110MB/sec writes across gigabit network via SMB shares. I noticed recently