[Systems] sunjammer.sugarlabs.org downtime - Wed Dec 30 9am-10am New_York time

[Tomeu Vizoso]

On Tue, Dec 29, 2009 at 17:23, Daniel Clark <dclark at pobox.com> wrote:
> The machine that hosts sunjammer.sugarlabs.org has several failed disks
> (we use triple-redundancy raid1, so all of the sunjammer.sugarlabs.org
> data is still on a "normal", double-redundancy raid1).
>
> I am tentatively planning on replacing them tomorrow morning, Wed Dec 30
> 9am-10am New_York time.
>
> Normally this would not require downtime, however unfortunately one of
> the dead disks is a 8GB SLC SSD that is may not be hot-swappable (used
> for boot, not in a pull-out chassis).
>
> The particular model of SSD we are using seems prone to early death
> (when we got the two of them, one was DOA), so we are going to just
> replace both of them with new 16GB SSDs from a different manufacturer.
>
> If there is time during the maintenance window, we are going to relocate
> all filesystem journals to the SSD RAID1, which some people have
> reported as giving significant performance improvements [1].
>
> I realize the timing could be better with Bernie being on vacation, but
> this work really needs to get done; if someone else who has root on
> sunjammer could be available on #fsfsys (freenode) during the
> maintenance window that would be useful.

I think I can be around, though I don't have much admin knowledge.

Regards,

Tomeu

> I'll confirm this timing via a post to the fsfstatus identi.ca group [2].
>
> [1] Improving Ext3 performance by placing the journal on a Flash Disk
> http://insights.oetiker.ch/linux/external-journal-on-ssd/
>
> [2] Monitor FSF and GNU Server Status (fsfstatus) group
> http://identi.ca/group/fsfstatus
>
> --
> Daniel JB Clark   | Sys Admin, Free Software Foundation
> pobox.com/~dclark | http://www.fsf.org/about/staff#danny
>
>
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