Re: [zfs-discuss] Pool vdev imbalance - getting worse?

2010-03-27 Thread Ian Collins
On 03/26/10 12:16 AM, Bruno Sousa wrote: Well...i'm pretty much certain that at my job i faced something similar.. We had a server with 2 raidz2 groups each with 3 drives, and one drive has failed and replaced by a hot spare. However, the balance of data between the 2 groups of raidz2 start to be

Re: [zfs-discuss] Pool vdev imbalance - getting worse?

2010-03-25 Thread Bruno Sousa
Well...i'm pretty much certain that at my job i faced something similar.. We had a server with 2 raidz2 groups each with 3 drives, and one drive has failed and replaced by a hot spare. However, the balance of data between the 2 groups of raidz2 start to be imbalance. I assume this is due the fact t

Re: [zfs-discuss] Pool vdev imbalance - getting worse?

2010-03-25 Thread Ian Collins
On 03/25/10 11:23 PM, Bruno Sousa wrote: On 25-3-2010 9:46, Ian Collins wrote: On 03/25/10 09:32 PM, Bruno Sousa wrote: On 24-3-2010 22:29, Ian Collins wrote: On 02/28/10 08:09 PM, Ian Collins wrote: I was running zpool iostat on a pool comprising a stripe of rai

Re: [zfs-discuss] Pool vdev imbalance - getting worse?

2010-03-25 Thread Bruno Sousa
Hi, You never experienced any faulted drives, or something similar? So far i only saw imbalance if the vdevs add changed, if a hotspare is used and i think even during a replacement of one disk of a raidz2 group. I Bruno On 25-3-2010 9:46, Ian Collins wrote: > On 03/25/10 09:32 PM, Bruno Sousa w

Re: [zfs-discuss] Pool vdev imbalance - getting worse?

2010-03-25 Thread Ian Collins
On 03/25/10 09:32 PM, Bruno Sousa wrote: On 24-3-2010 22:29, Ian Collins wrote: On 02/28/10 08:09 PM, Ian Collins wrote: I was running zpool iostat on a pool comprising a stripe of raidz2 vdevs that appears to be writing slowly and I notice a considerable imbalance of both free space

Re: [zfs-discuss] Pool vdev imbalance - getting worse?

2010-03-25 Thread Markus Kovero
> This system has since been upgraded, but the imbalance in getting worse: > > zpool iostat -v tank | grep raid > raidz2 3.60T 28.5G166 41 6.97M 764K > raidz2 3.59T 33.3G170 35 7.35M 709K > raidz2 3.60T 26.1G173 35 7.36M 658K > raidz2

Re: [zfs-discuss] Pool vdev imbalance - getting worse?

2010-03-25 Thread Bruno Sousa
Hi, As far as i know this is a "normal" behaviour in ZFS... So what we need is somesort of "rebalance" task what moves data around multiple vdevs in order to achieve the best performance possible... Take a look to http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6855425 Bruno On 24-3-

Re: [zfs-discuss] Pool vdev imbalance - getting worse?

2010-03-24 Thread Ian Collins
On 02/28/10 08:09 PM, Ian Collins wrote: I was running zpool iostat on a pool comprising a stripe of raidz2 vdevs that appears to be writing slowly and I notice a considerable imbalance of both free space and write operations. The pool is currently feeding a tape backup while receiving a large

Re: [zfs-discuss] Pool vdev imbalance

2010-02-28 Thread Ian Collins
Andrew Gabriel wrote: Ian Collins wrote: I was running zpool iostat on a pool comprising a stripe of raidz2 vdevs that appears to be writing slowly and I notice a considerable imbalance of both free space and write operations. The pool is currently feeding a tape backup while receiving a larg

Re: [zfs-discuss] Pool vdev imbalance

2010-02-28 Thread Andrew Gabriel
Ian Collins wrote: I was running zpool iostat on a pool comprising a stripe of raidz2 vdevs that appears to be writing slowly and I notice a considerable imbalance of both free space and write operations. The pool is currently feeding a tape backup while receiving a large filesystem. Is this

[zfs-discuss] Pool vdev imbalance

2010-02-27 Thread Ian Collins
I was running zpool iostat on a pool comprising a stripe of raidz2 vdevs that appears to be writing slowly and I notice a considerable imbalance of both free space and write operations. The pool is currently feeding a tape backup while receiving a large filesystem. Is this imbalance normal?