Re: [zfs-discuss] Disk I/O in RAID-Z as new disks are added/removed

2009-11-17 Thread Bob Friesenhahn
On Sun, 15 Nov 2009, Joe Auty wrote: I've see several comparisons to existing RAID solutions, but I'm not finding whether the more disks you add, the more I/O you can get, unless I'm missing something? Perhaps that is because "it depends" and you may or may not get "more I/O", depending on w

Re: [zfs-discuss] Disk I/O in RAID-Z as new disks are added/removed

2009-11-17 Thread Joe Auty
Tim Cook wrote: > On Sun, Nov 15, 2009 at 2:57 AM, besson3c > wrote: > > Anybody? > > I would truly appreciate some general, if not definite insight as > to what one can expect in terms of I/O performance after adding > new disks to ZFS pools. > > > >

Re: [zfs-discuss] Disk I/O in RAID-Z as new disks are added/removed

2009-11-15 Thread Brandon High
On Sun, Nov 8, 2009 at 12:05 AM, besson3c wrote: > Any general information you can provide me as far as the theoretical concepts > behind increasing I/O by adding disks to a RAID-Z pool would be appreciated > as I assess this technology :) As with RAID5 and RAID6, a wider stripe will improve re

Re: [zfs-discuss] Disk I/O in RAID-Z as new disks are added/removed

2009-11-15 Thread Tim Cook
On Sun, Nov 15, 2009 at 2:57 AM, besson3c wrote: > Anybody? > > I would truly appreciate some general, if not definite insight as to what > one can expect in terms of I/O performance after adding new disks to ZFS > pools. > > > I'm guessing you didn't get a response because the first result on go

Re: [zfs-discuss] Disk I/O in RAID-Z as new disks are added/removed

2009-11-15 Thread besson3c
Anybody? I would truly appreciate some general, if not definite insight as to what one can expect in terms of I/O performance after adding new disks to ZFS pools. -- This message posted from opensolaris.org ___ zfs-discuss mailing list zfs-discuss@open

[zfs-discuss] Disk I/O in RAID-Z as new disks are added/removed

2009-11-08 Thread besson3c
Hello, As I understand it, in a traditional RAID 5 setup adding new disks to the pool provides more overall I/O as the load is spread out across multiple disks. What exactly is this relationship in a RAID-Z setup? What should one expect in terms of overall I/O performance as disks are added and