On Fri, 2016-03-25 at 19:41 +0000, Jeffrey Mohler wrote:
> They should be 100% on an empty aggregate..but still, spindles seem
> to handle the workload just fine.
>
> What the history of CPU on the system..when did it work well last,
> what was CPU load then?
>  
> _________________________________
> Jeff Mohler
> Tech Yahoo, Storage Architect, Principal
> (831)454-6712
> YPAC Gold Member
> Twitter: @PrincipalYahoo
> CorpIM:  Hipchat & Iris
>
>
>
> On Friday, March 25, 2016 12:28 PM, josef radinger <cheese@nosuchhost
> .net> wrote:
>
>
> performance advisor shows the following:
> read latency on a vmware-datastore at around 5-20ms.
> write latency at around 10-15ms with peaks:
> "other" latency at up to 500ms, i'm quite sure this other is my
> problem.
>
> but what me bothers is the stripe ratio: 
>    2428.65 partial stripes                  85.83 full stripes
> my knowledge is that i should have a lot more full stripes than
> partial ones.
>
> images are at
> http://www.nosuchhost.net/~cheese/temp/readandwrite.png
> http://www.nosuchhost.net/~cheese/temp/other.png
>
> my colleagues had troubles while patching several windows-systems
> residing in that datastore, as the systems got unresponsive and
> access got very slow.
>
>
> On Fri, 2016-03-25 at 18:42 +0000, Jeffrey Mohler wrote:
> > Are you write latency troubled, or read latency troubled?
> >
> > I don't see free space frag as a huge issue, as lightly loaded as
> > the spindles report to be.
> >
> >
> >  
> > _________________________________
> > Jeff Mohler
> > Tech Yahoo, Storage Architect, Principal
> > (831)454-6712
> > YPAC Gold Member
> > Twitter: @PrincipalYahoo
> > CorpIM:  Hipchat & Iris
> >
> >
> >
> > On Friday, March 25, 2016 11:37 AM, josef radinger <cheese@nosuchho
> > st.net> wrote:
> >
> >
> > hi
> >
> > i have a metro cluster (rather old) which is currently responding
> > very
> > slowly. 7-mode 8.1.4
> >
> > there is only one aggregate per head, filled at around 72% one one
> > head
> > and 79% on the other head. attached is a statit and sysstat -x 1 
> > from one head.
> >
> > i see lots of partial stripes and only several full stripes. i
> > assume
> > this should mean not enough free space, which should imho not be a
> > problem at my aggregates.
> >
> > what is the correct procedure for performing a free space
> > reallocation?
> > i did:
> > * stop all volume-reallocates
> > * disable read_reallocation on all volumes
> > * raid.lost_write.enable       off
> > * aggr options aggr0 resyncsnaptime 5
> > * reallocate start -A -o aggr0
> > * wait for finish of reallocate
> > * aggr options aggr0 resyncsnaptime 60
> > * enable read_reallocation on all volumes
> > * reenable all volume-level reallocates
> >
> > my aggregates have options:
> >
> > aggr options aggr0
> > root, diskroot, nosnap=off, raidtype=raid_dp, raidsize=20, 
> > ignore_inconsistent=off, snapmirrored=off, resyncsnaptime=60, 
> > fs_size_fixed=off, snapshot_autodelete=on, lost_write_protect=on, 
> > ha_policy=cfo, hybrid_enabled=off, percent_snapshot_space=5%, 
> > free_space_realloc=off
> >
> >
> > any advice?
> > josef
> >
> >
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> >
>