[Openstack] [Swift] block I/O all disks

Mark Kirkwood mark.kirkwood at catalyst.net.nz
Wed Nov 11 05:53:18 UTC 2015

On 11/11/15 00:59, Heiko Krämer wrote:
> Hi Mark,
> thanks for your response.
> I changed the dirty page settings again and i have a logging server
> which gets the syslog and swift logs.
> But this messages will not help to find the problem. They are stale
> processes and it seems the start partition is the SSD Raid1 which caused
> in a cascade overall SATA HDD's.

(I'm gonna bottom post replies fyi...)

Ah, good sleuthing! So I wonder if your SSD are the problem - what make 
and model are they? Some do *not* like being RAID'ed. We pretty much 
will only use Intel DC37xx series as they seem to avoid all the nasty 
edge case behaviours that most other models exhibit (stalls, sudden 
catastrophic failues)...

I'm still not 100% clear on your setup, are you using the SSD for 
account and container servers? or is all your Swift stuff on the SATA 
drives? *If* you are using the SSD for account + container you might be 
better off not RAIDing them.



More information about the Openstack mailing list