On Tuesday 08 May 2012 10:21:35 David Wallom wrote:
> Hi Alex,
>
> Thanks, will you be doing I/O perf measurements as part of the acceptance
> testing?
Its actually quite difficult to measure the total I/O performance of the
whole cluster. What we did, before we upgraded all the network to 10Gb+,
was to measure the performance of a "brick" consisting of 6 storage
servers and 12 cpu boxes and upto 4 threads/node on one switch. This gave
us ~1.2 GB/s matching the 10 Gb switch uplinks we had at the time. Now
that we have 10 Gb everywhere I would expect the equivalent "brick"
performance to be only a bit better, but we can agregate more together
in the rack switches and the trunking to the z9000's won't be a limitation.
> Does anyone know of any limits inside any of the solutions for
> the catalogues etc?
>
> David
>
> >Hi David,
> >
> > We are fairly confident that our current
> >
> >Lustre/Storm
> >setup (which will shortly be ~1.8 PB) could be scaled a factor of
> >~10,
> >without big problems now that we upgraded our switches. We will probably
> >be
> >able to quantify this a bit more when it is all fully working.
> >
> >cheers,
> >Alex
> >
> >On Tuesday 08 May 2012 09:37:47 David Wallom wrote:
> >> Hi,
> >>
> >> Does anyone know of any work using the currently deployed SRM solutions
> >>
> >>on
> >>
> >> scalability both in terms of total volume stored in a single instance,
> >> input bandwidth and I/o rates? Just thinking about possible solutions
> >>
> >>for
> >>
> >> SKA.
> >>
> >> Cheers
> >>
> >> David
> >> --
> >> ++++++++++++++++++++++++++++++++++++++++
> >> Dr David Wallom
> >> Associate Director Innovation, Oxford eResearch Centre
> >> Technical Director, UK NGS
> >> VP Communities, OGF
> >>
> >> Oxford eResearch Centre
> >> 7 Keble Road
> >> Oxford
> >> OX1 3QG
> >> UK
> >>
> >> Tel: +44 1865 610601
> >> ++++++++++++++++++++++++++++++++++++++++
--
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| Dr. Alex Martin |
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