[SAC] [support.osuosl.org #30704] OSGeo Server Parts Order

[Lance Albertson via RT]

On Mon Aug 26 09:39:48 2019, lr at pcorp.us wrote:
> Sorry I guess I missed all this discussion.
> 
> For the OSGeo7 we had 500GB allocated for root, and the rest of the disks were
> set aside for ZFS.
> 
> I think a similar setup will work.  Note the 500 GB is useful for exporting
> images so I'd like at least that much separate from our lxd ZFS pool.  It
> doesn't need to be the root drive and doesn't really need mirroring either.
> 
> I think going with RAID0 is probably the best.  Also last time we did this --
> you just inserted the Ubuntu 18.04 disk in the CD tray and we took care of the
> installation.  Not sure if that is doable or if because of the way the RAID is
> setup that's not doable.

Based on what I mention below, how do you want the physical disks setup with
regards to the HW RAID? Should the rootfs, should that have any RAID and if so
what? You mentioned RAID0 above, I wasn't sure for which volume. Also, I'm not
sure how OSGeo7 was configured as far as HW RAID and disks.

Thanks-

> >> So it sounds like you want the server setup with a JBOD (just a bunch of
> >> disks) effectively making each disk visible for ZFS and no HW RAID.
> >> Unfortunately, the disk controllers technically don't support JBOD, however
> >> we can work around it by setting up each disk as a RAID0 device. This is
> >> what we do our Ceph storage nodes and it works quite nicely. It also allows
> >> the disks to use the HW RAID cache.
> >>
> >> Do you want me to attempt to do a rootfs on ZFS or try and keep it simple
> >> and just do a RAID1 with the first partition on two or more drives, and
> >> leave the rest of the drives for ZFS?

-- 
Lance Albertson
Director
Oregon State University | Open Source Lab