[zfs-discuss] raidz2 read performance

2011-01-20 Thread Bueno
We are using the following equipment: - 12 x WD RE3 1TB SATA - 1 x lsi 1068e HBA - supermicro expander - xeon 5520 / 12gb memory We're having very slow read performance on our san/nas. We have one raidz2 pool of 12 devices. We use the pool for iscsi ( xenserver virtual machines) + cifs share.

[zfs-discuss] Troubleshooting help on ZFS

2011-01-20 Thread Steve Kellam
I have a home media server set up using OpenSolaris. All my experience with OpenSolaris has been through setting up and maintaining this server so it is rather limited. I have run in to some problems recently and I am not sure how the best way to troubleshoot this. I was hoping to get some

Re: [zfs-discuss] Troubleshooting help on ZFS

2011-01-20 Thread Michael Schuster
On Thu, Jan 20, 2011 at 01:47, Steve Kellam opensolaris-sjksn...@sneakemail.com wrote: I have a home media server set up using OpenSolaris.   All my experience with OpenSolaris has been through setting up and maintaining this server so it is rather limited.   I have run in to some problems

Re: [zfs-discuss] Troubleshooting help on ZFS

2011-01-20 Thread Remco Lengers
Hi Steve, Anything in: cat /var/adm/messages fmdump -ev ? ..Remco On 1/20/11 1:47 AM, Steve Kellam wrote: I have a home media server set up using OpenSolaris. All my experience with OpenSolaris has been through setting up and maintaining this server so it is rather limited. I have run

Re: [zfs-discuss] Is my bottleneck RAM?

2011-01-20 Thread Eugen Leitl
On Tue, Jan 18, 2011 at 07:07:50AM -0800, Richard Elling wrote: I'd expect more than 105290K/s on a sequential read as a peak for a single drive, let alone a striped set. The system has a relatively decent CPU, however only 2GB memory, do you think increasing this to 4GB would

Re: [zfs-discuss] Is my bottleneck RAM?

2011-01-20 Thread Ware Adams
On Jan 20, 2011, at 11:18 AM, Eugen Leitl wrote: I'd expect more than 105290K/s on a sequential read as a peak for a single drive, let alone a striped set. The system has a relatively decent CPU, however only 2GB memory, do you think increasing this to 4GB would noticeably affect

[zfs-discuss] sbdadm: unknown error (Solaris 11 Express)

2011-01-20 Thread Benjamin Cheng
Hi all, I've been following the Oracle Solaris ZFS Administration guide here: http://download.oracle.com/docs/cd/E19963-01/821-1448/ftyxh/index.html I am able to create my ZFS volume but am having trouble when I get to the step of creating a LUN using sbdadm, it will inevitably return the

Re: [zfs-discuss] sbdadm: unknown error (Solaris 11 Express)

2011-01-20 Thread Cindy Swearingen
My first inclination is 128k is too small for a pool component. You might try something more reasonable, like 1G, if you're just testing. Thanks, Cindy # zfs create -V 2g sanpool/vol1 # stmfadm create-lu /dev/zvol/rdsk/sanpool/vol1 Logical unit created: 600144F0C49A05004CC84BE20001 On

Re: [zfs-discuss] Is my bottleneck RAM?

2011-01-20 Thread Brandon High
On Thu, Jan 20, 2011 at 8:18 AM, Eugen Leitl eu...@leitl.org wrote: Oh, and with 4x 3 TByte SATA mirrored pool is pretty much without alternative, right? You can also use raidz2, which will have a little more resiliency. With mirroring, you can lose one disk without data loss, but losing a

Re: [zfs-discuss] Troubleshooting help on ZFS

2011-01-20 Thread Brandon High
On Wed, Jan 19, 2011 at 4:47 PM, Steve Kellam opensolaris-sjksn...@sneakemail.com wrote: I set this up about a year ago and have had very few problems.  I was streaming a movie off the server a few days ago and it all of a sudden lost connectivity with the server.  When I checked the server,

[zfs-discuss] NFS slow for small files: idle disks

2011-01-20 Thread Michael Hase
The discussion is really old: writing many small files on an nfs mounted zfs filesystem is slow without ssd zil due to the sync nature of the nfs protocol itself. But there is something I don't really understand. My tests on an old opteron box with 2 small u160 scsi arrays and a zpool with 4

Re: [zfs-discuss] raidz2 read performance

2011-01-20 Thread Edward Ned Harvey
From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- boun...@opensolaris.org] On Behalf Of Bueno Is it true that a raidz2 pool has a read capacity equal to the slowest disk's IOPs per second ?? No, but there's a grain of truth there. Random reads: * If you have a single process