[Gluster-users] one brick vs multiple brick on the same ZFS zpool.

[Jamie Lawrence]

Not necessarily. ZFS does things fairly differently than other filesystems, and can be faster than HW RAID. I’d recommend spending a bit of time reading up - the Linux ZFS-discuss list archives are a great place to start - http://list.zfsonlinux.org/pipermail/zfs-discuss/ .

That said, if you’re not using the ZFS feature set and don’t want to invest some time on learning about it (it really is rather different than most file systems), I’d recommend *not* using it, because people all too often lose data due to misconfiguration, misunderstanding or the assumption that it behaves like other filesystems. In which case,  XFS is probably a good option for you.

-j


> On Mar 6, 2017, at 3:12 PM, Dung Le <vic_le at icloud.com> wrote:
> 
> Hi,
> 
> How about hardware raid with XFS? I assuming it would be faster than ZFS raid since it has physical cache on raid controller for reads and writes.
> 
> Thanks,
> 
> 
>> On Mar 6, 2017, at 3:08 PM, Gandalf Corvotempesta <gandalf.corvotempesta at gmail.com> wrote:
>> 
>> Hardware raid with ZFS should avoided
>> ZFS needs direct access to disks and with hardware raid you have a controller in the middle
>> 
>> If you need ZFS, skip the hardware raid and use ZFS raid
>> 
>> Il 6 mar 2017 9:23 PM, "Dung Le" <vic_le at icloud.com> ha scritto:
>> Hi,
>> 
>> Since I am new with Gluster, need your advices. I have 2 different Gluster configuration:
>> 
>> Purpose: Need to create 5 Gluster volumes. I am running the gluster version is 3.9.0.
>> 
>> Config #1: 5 bricks from one zpool
>> 	• 3 storage nodes.
>> 	• Using hardware raid to create one array with raid5 (9+1) per storage node 
>> 	• Create a zpool on top of the array per storage node
>> 	• Create 5 ZFS shares (each share is a brick) per storage node
>> 	• Create 5 volumes with replica of 3 using 5 different bricks.
>> 
>> Config #2: 1 brick from one zpool
>> 	• 3 storage nodes.
>> 	• Using hardware raid to create one array with raid5 (9+1) per storage node
>> 	• Create a zpool on top of the array per storage node
>> 	• Create 1 ZFS shares per storage node. Using the share as brick.
>> 	• Create 5 volumes with replica of 3 with same share.
>> 
>> 1) Is there any different on the performance on both config? 
>> 2) Will the single brick be handling parallel writing vs multiple brick?
>> 3) Since I am using hardware raid controller, any option that I need to enable or disable for the gluster volume?
>> 
>> Best Regards,
>> ~ Vic Le
>> 
>> 
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