[GRLUG] Best Local SAN performance

[Grand Rapids Linux Users Group]

On Mon, 2020-06-15 at 14:27 -0400, Grand Rapids Linux Users Group
wrote:
> My personal preference, after building and maintaining my own for
> over 10 years.. is..
> A controller that does JBOD, partition 98-98% of the disks, use linux
> mdadm software RAID in a raid-5 or 6 configuration.  The reason for
> this is, if your controller goes bad, you can replace it with pretty
> much anything and your system will still see your disks.  And with
> software raid, you can easily expand the array as needed, and tailor
> the re-sync to your needs.  You can also see details for the various
> disks since they're not hidden behind a controller (so you can check
> for bad sectors, read/write errors, etc easily.)

I concur with the use of 'soft' raid a server;  hardware RAID can be a
real pain to get working after a failure [which, isn't that kind the
point?] while MD is really flexible and easy.  Also CPU, etc... isn't
really a host side limitation anymore;  if you let the storage server
focus on storage [and don't load on a bunch of other services] you can
get blazing performance from a rather vanilla box.

-- 
Adam Tauno Williams, awilliam at whitemice.org
Multi-Modal Activists Against Auto Dependent Development
resisting the unAmerican socialists of the Motorist hegemony
http://www.mmaaadd.org