Hi Folks, A couple of my users have decided to stand up a large data store machine (NAS?) with as many as 44-ea 12-TB disks. They've grown weary of my way of doing things and are thinking about using only one or two HBA boards instead of a RAID adapter. Then, they're looking at doing software RAID using ZFS. Does anyone here have any experience with ZFS? How does it compare with Btrfs? ZFS performance suffers when an array starts to fill up, how does Btrfs handle full arrays? How many disks can be configured with RAID6 (or equivalent)? In other words, is there some maximum number of disks in a single array that if exceeded will cause performance degradation? I've had as many as 23-disks in a single hardware RAID6 array and it seems to work okay. Thanks in advance for any words of wisdom, Lew -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On Wed, 9 Jan 2019 10:39:48 -0800 Lew Wolfgang <wolfgang@sweet-haven.com> wrote:
Does anyone here have any experience with ZFS?
I used it as a network drive provided by our sysadmins. The only thing I remember is that it was so slow as to be unusable until they went and bought a bunch of SSD disks to add as cache to the ZFS filesystem. After that, it seemed to behave as far as I was concerned but I was just a user. The admins must have liked it since they chose it. I preferred XFS on my own disks. And reiser :) -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
On 01/09/2019 12:39 PM, Lew Wolfgang wrote:
How does it compare with Btrfs? ZFS performance suffers when an array starts to fill up, how does Btrfs handle full arrays?
Can't help with ZFS, but there are warnings about not using software RAID56 with Btrfs (it is unstable - write hole still exists). See: https://btrfs.wiki.kernel.org/index.php/Status -- David C. Rankin, J.D.,P.E. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org
participants (3)
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Dave Howorth
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David C. Rankin
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Lew Wolfgang