Context is key here. Where you run mmdiag—iohist matters, clientside or nsd
server side.
>From what I have seen and possibly understand, from the client, the time field
>indicates when an I/O was fully serviced (arrived into VFS layer, to be sent
>to the application), including RTT from the
of your
local NSD servers and see what kind of results you get out of it.
Steve Crusan
scru...@ddn.com<mailto:scru...@ddn.com>
(719) 695-3190
From: on behalf of Marc A Kaplan
Reply-To: gpfsug main discussion list
Date: Tuesday, July 10, 2018 at 11:16 AM
To: gpfsug main discussio
Kevin,
While this is happening, are you able to grab latency stats per LUN
(hardware vendor agnostic) to see if there are any outliers? Also, when looking
at the mmdiag output, are both reads and writes affected? Depending on the
storage hardware, your writes might be hitting cache, so
