There’s more to it than bottlenecking. RAS, man. RAS. > On Jul 12, 2024, at 3:58 PM, John Jasen <jjasen@xxxxxxxxx> wrote: > > How large of a ceph cluster are you planning on building, and what network cards/speeds will you be using? > > A lot of the talk about RAID HBA pass-through being sub-optimal probably won't be your bottleneck unless you're aiming for a large cluster at 100Gb/s speeds, in my opinion. > > On Fri, Jul 12, 2024 at 12:02 PM Drew Weaver <drew.weaver@xxxxxxxxxx <mailto:drew.weaver@xxxxxxxxxx>> wrote: >> Okay it seems like we don't really have a definitive answer on whether it's OK to use a RAID controller or not and in what capacity. >> >> Passthrough meaning: >> >> Are you saying that it's OK to use a raid controller where the disks are in non-RAID mode? >> Are you saying that it's OK to use a raid controller where each disk is in its own RAID-0 volume? >> >> I'm just trying to clarify a little bit. You can imagine that nobody wants to be that user that does this against the documentation's guidelines and then something goes terribly wrong. >> >> Thanks again, >> -Drew >> >> >> -----Original Message----- >> From: Anthony D'Atri <aad@xxxxxxxxxxxxxx <mailto:aad@xxxxxxxxxxxxxx>> >> Sent: Thursday, July 11, 2024 7:24 PM >> To: Drew Weaver <drew.weaver@xxxxxxxxxx <mailto:drew.weaver@xxxxxxxxxx>> >> Cc: John Jasen <jjasen@xxxxxxxxx <mailto:jjasen@xxxxxxxxx>>; ceph-users@xxxxxxx <mailto:ceph-users@xxxxxxx> >> Subject: Re: Repurposing some Dell R750s for Ceph >> >> >> >> > >> > Isn’t the supported/recommended configuration to use an HBA if you have to but never use a RAID controller? >> >> That may be something I added to the docs. My contempt for RAID HBAs knows no bounds ;) >> >> Ceph doesn’t care. Passthrough should work fine, I’ve done that for tends of thousands of OSDs, albeit on different LSI HBA SKUs. >> _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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