For Sun T1/T2 processors, the better tool instead of top is corestat
(available at http://www.sun.com/servers/coolthreads/overview/cooltools.jsp)
and mpstat. Running both it's easy to see if a process is bottlenecked at a
single core or scales with the coolthreads.
I'd love to see what a fully loaded T5240 box could do. With 2 x T2+
processors and 128 threads of execution, it would seem ideal for legato.
On 4/26/08 5:59 PM, "Yaron Zabary" <yaron AT ARISTO.TAU.AC DOT IL> wrote:
> Will Parsons wrote:
>> Hi Rick,
>> I'll add weight to the T2000 camp.
>> I implemented a storage node a few weeks back, and put one in as the
>> Networker Server 10 days ago. We've got about 300 clients, and the old
>> servers (both SUN E280R's) were maxed out on CPU running the network
>> cards at 600Mb/s.
>> The new boxes have EtherChannel running the 4 network cards together,
>> and I'm now seeing 1,600Mb/s (Master server only) incoming from the
>> network and out to the tape drives (14 LTO2 drives with Drive sharing).
>> I'm probably now speed limited by the network further up-stream, and the
>> sending speed of the clients, so I'm much happier about the whole setup.
>>
>> My choice of the T2000 over the M series came down to money. If you can
>> get THAT much grunt into a sub £10K server, why buy a £50K server? I got
>> the 32 core, 16GB machines, and the CPU's are peaking at about 20%
>> utilised, so I've got plenty of head-room for expansion.
>
> These are 8 core/32 threads CPUs. I suggest that you will use top
> (you can get it from www.sunfreeware.com) to check CPU utilization of
> the single nsrmmd processes. In your case, a process with 3.12% (100/32)
> means that the CPU speed is limiting you regardless of the fact that you
> are only using 20% of the machine. As I already mentioned I see some
> nsrmmd processes at 4.16% (100/24 logical CPUs).
>
>> I've got 2 dual-port HBA's in there giving 2 ports for tape, and 2 for
>> disk (just /nsr at present, but trialling an external array for BvD
>> soon). I'm hoping that this setup will let me do plenty with disk,
>> without having to buy separate SUN X4500's as storage nodes (not enough
>> PCI-x bandwidth in those yet).
>> All that, and I've STILL got enough spare PCI-e slots to drop in a 10Gig
>> ethernet card when our Data Centre network gets upgraded this summer.
>>
>> HTH.
>> From
>> Will
>>
>>
>> rick pim wrote:
>>> our main networker server is a sun v490 (4x1500 MHz CPU, 32 GB)
>>> direct-connected via fiber to 3 LTO-3 drives in an L8500 library.
>>> our current tape footprint is probably in the 20-30 TB range
>>> but we're expecting some growth.
>>>
>>> this server has more or less performed adequately, but it has two
>>> limitations:
>>>
>>> - PCI bus only
>>> - only two network interfaces
>>>
>>> we're in the position that a data center network redesign is going
>>> to require at least three network interfaces, so we're going to replace
>>> the server rather than just trying to wedge another network card into
>>> an already-too-small-bus.
>>>
>>> we're a sun shop with almost exclusively sparc hardware so we'd like
>>> to stick with that. with this constraint, two obvious upgrade paths
>>> are:
>>> - one of the coolthreads servers, t2000, t5220 or similar
>>> - one of the other "midrange" servers -- sun's M series or equivalent
>>>
>>> does anyone have experiences, horror stories, warnings or
>>> recommendations that they'd be willing to share?
>>>
>>> rp
>>>
>>> rick pim rick AT post.queensu DOT
>>> ca
>>> information technology services (613) 533-2242
>>> queen's university, kingston
>>> -----------------------------------------------------------------------
>>> "Nine million terrorists in the world, and I gotta kill one with feet
>>> smaller'n my sister."
>>> -- Die Hard
>>>
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>>
>>
>
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