On 2023-01-24 17:40, Tom Smyth wrote:
> Hi Atanas,
> in general (not specific to RAID5 Softraid in OpenBSD... )
> I would advise the following based on my own experience...
> Raid5 in hardware raid generally has poor write performance due the
> number of actual writes to disk per
> write operation to the raid controller ( parity reads and rewrites
> once you write to disks) see
> https://www.arcserve.com/blog/understanding-raid-performance-various-levels#:~:text=This%20means%20that%20a%20RAID,write%20performance%20is%20NX%2F4.
>
> becuase of the number of physical writes per raid device write...
> Raid5 and SSDs dont really go together... ... unless you like
> replacing SSD Disks in your arrays...
> suggest meet and potatoes RAID 1 or Raid 10 ... for ssd ... and you
> then dont suffer write penalties... associated with Raid 5...
>
Thanks for your reply!
It really makes sense, and it looks like I'll switch to RAID1.
Best wishes,
Atanas
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