[kwlug-disc] Old Man Yells at ZFS (was: Docker Host Appliance)

[Chris Irwin]

On Tue, Jan 17, 2023 at 05:16:52PM -0500, William Park via kwlug-disc wrote:
>>>
>>>But again, with btrfs RAID5/6 *should not be used in production*.
>>
>>Agreed, never use the parity modes in BTRFS.
>> ...
>
>Yeah.  For those who aren't aware, BTRFS interpret RAID1 as "copies on 
>2 different disks".  So, it can do RAID1 across 3 disks, eg. disk A & 
>B, disk B & C, and disk A & C.

It also has RAID1c3 and RAID1c4 modes, which add additional copies to 
survive additional disk failures.

The real downside is with RAID1c3, only 33% of your total raw storage is 
can actually be allocated (3x copies of everything).

This is where stable parity modes would be nice.

-- 
Chris Irwin

email:   chris at chrisirwin.ca
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