Have you set NET_BUFFER_SZ at all on the clients? It may try and
increase the throughput buffer wise from client end where it was using
standard values before.
Dave
Paul Keating wrote:
>I can add more GigE cards.....matter of fact the box already has a dual GigE
>NIC installed.
>But I don't want to add bigger doors in front of a small hallway.
>Ie...can the PCI bus/bridge support 2 more GigE NICs.
>Networks is monitoring my switch ports and showing me peaks less than 200Mb/s
>on each of my Gig cards.....avg even less.
>
>I'm getting a sniffer ready to monitor my NICs for a few minutes during some
>peak periods......should be able to tell me if the server is congested and
>pushing back, or if the clients just aren't sending it fast enough.
>
>Looking at deploying some media servers this year anyway, so....
>
>Paul
>
>
>
>
>>-----Original Message-----
>>From: veritas-bu-admin AT mailman.eng.auburn DOT edu
>>[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] On Behalf Of
>>Austin Murphy
>>Sent: February 7, 2006 2:58 PM
>>To: veritas-bu AT mailman.eng.auburn DOT edu
>>Subject: Re: [Veritas-bu] performance?
>>
>>
>>It looks like you are maxing out your Gigabit ethernet cards.
>>
>>My performance measurements of Gigabit ethernet were at best ~35MB/sec
>>for one normal gigabit link. The only numbers I saw on the internet
>>that were substantially higher used jumbo frames.
>>
>>I'm using an E450 (4x 296MHz) with a 4-port GigaSwift (2 ports live,
>>2 offline). I restricted the storage unit to only use 2 drives
>>(LTO-2) at once, each of which maxes out at ~30MB/sec native.
>>
>>If you added a 4x GigaSwift card (or two) and arranged your network to
>>make use of the extra Gigabit links, you could pump more data to your
>>tapes. If you can spend a bit more money you might try a faster
>>technology like 10GbE or IP over Fibrechannel. Beyond that I think
>>you are looking at a media server.
>>
>>Austin Murphy
>>
>>
>>On 2/7/06, Paul Keating <pkeating AT bank-banque-canada DOT ca> wrote:
>>
>>
>>>I'm running a Sunfire V880.
>>>
>>>4x 1.2 GHz Ultrasparc III+ proc.
>>>8 Gig Ram
>>>
>>>6 internal 72 Gig disks.
>>>
>>>1st pair disks mirrored OS /, /usr, /opt, etc etc
>>>2nd pair disks mirrored /opt/openv (replicated to a standby
>>>
>>>
>>system using
>>
>>
>>>Veritas Volume Replicator)
>>>3rd pair disks one slice mirrored for VVR's SRL logs
>>> remainder of the two disks concatenated
>>>
>>>
>>into a 96 Gig FS
>>
>>
>>>for a DSSU for a couple of small clients on 10Mb/s HD
>>>
>>>
>>encrypted links.
>>
>>
>>>Pair of FC200 HBAs in 66MHz PCI slots
>>>Pair of GigaSwift GigE cards in 33MHz PCI slots (only 2
>>>
>>>
>>66Mhz slots on the
>>
>>
>>>machine.)
>>>
>>>the HBAs each feed 7 tape drives and 1 robot.....using Inline tape
>>>copy.....the robots are essentially mirrored....one onsite,
>>>
>>>
>>one at the end
>>
>>
>>>of a DWDM link.
>>>
>>>
>>>I previously had only 3 drives at each site.....and added
>>>
>>>
>>the additional 4
>>
>>
>>>at each site two weeks ago.
>>>
>>>with the 3 drives per site, I was getting approx 60MB/s
>>>
>>>
>>total date to the
>>
>>
>>>three drives...so an avg of 20MB/s drive.
>>>
>>>The addidional drives were added for resiliency (Mgmt
>>>
>>>
>>wanted two stus, one
>>
>>
>>>for dev, one for prod servers..so now we have a stu with 4
>>>
>>>
>>drives avail for
>>
>>
>>>prod, and 3 drives avail for dev)
>>>in the case where a client or two stuck at half duplex
>>>
>>>
>>hangs up a drive all
>>
>>
>>>night, the remainder of jobs can finish...
>>>
>>>The problem is that, after adding the new tape drives, we
>>>
>>>
>>don't get any more
>>
>>
>>>total throughput....seemd stuck at about 60-65MB/s, but now
>>>
>>>
>>spread among
>>
>>
>>>twice the tape drives.
>>>This means that since more machines are backing up
>>>
>>>
>>concurrantly (allowed
>>
>>
>>>because of the increased number of drives) that each
>>>
>>>
>>machine is backing up
>>
>>
>>>slower...in effect, each machine is taking twice as long to back
>>>up....causing some major issues.
>>>
>>>Anyone know of any particular configs or issues that may be
>>>
>>>
>>affecting us
>>
>>
>>>here? benchmarks on processing required to manage this many
>>>
>>>
>>ITC jobs? we
>>
>>
>>>didn't see a performance hit in the lab, but never had this
>>>
>>>
>>big of a system
>>
>>
>>>in the lab to really load it.
>>>
>>>I've been doing consant IOstat and netstat monitoring....no
>>>waits/queues/errors/collisions anywhere, except at one
>>>
>>>
>>point for about 15
>>
>>
>>>minutes during the FULL window on the weekend, a few waits
>>>
>>>
>>accumulated on
>>
>>
>>>the disks the /opt/openv resides on....but the performance
>>>
>>>
>>was the same
>>
>>
>>>during that period as the remaining 24+ hours, where there
>>>
>>>
>>were no waits.
>>
>>
>>>any new ideas would be welcome.
>>>
>>>Thanks,
>>>Paul
>>>
>>>
>>>
>>==============================================================
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