Re: some simple nfs-benchmarks on 5.4 RC2

From: Eric Anderson (anderson_at_centtech.com)
Date: 04/19/05

  • Next message: Eivind Hestnes: "Performance Intel Pro 1000 MT (PWLA8490MT)" 
    Date: Tue, 19 Apr 2005 08:59:14 -0500
To: Claus Guttesen <kometen@gmail.com>

    Claus Guttesen wrote:
    >>What state is nfsd in? Can you send the output of this:
    >>ps -auxw|grep nfsd
    >>while the server is slammed?
    >
    >
    > elin~%>ps -auxw|grep nfsd
    > root 378 3,7 0,0 1412 732 ?? D Tor07am 4:08,82 nfsd:
    > server (nfsd)
    > root 380 3,5 0,0 1412 732 ?? D Tor07am 1:56,52 nfsd:
    > server (nfsd)
    > root 379 3,4 0,0 1412 732 ?? D Tor07am 2:34,96 nfsd:
    > server (nfsd)
    > root 381 3,0 0,0 1412 732 ?? D Tor07am 1:31,72 nfsd:
    > server (nfsd)
    > root 382 3,0 0,0 1412 732 ?? S Tor07am 1:14,97 nfsd:
    > server (nfsd)
    > root 377 2,8 0,0 1412 732 ?? D Tor07am 10:18,51 nfsd:
    > server (nfsd)
    > root 383 2,2 0,0 1412 732 ?? S Tor07am 1:03,79 nfsd:
    > server (nfsd)
    > root 387 2,0 0,0 1412 732 ?? S Tor07am 0:41,69 nfsd:
    > server (nfsd)
    > root 388 2,0 0,0 1412 732 ?? D Tor07am 0:38,09 nfsd:
    > server (nfsd)
    > root 384 1,9 0,0 1412 732 ?? S Tor07am 0:55,95 nfsd:
    > server (nfsd)
    > root 385 1,8 0,0 1412 732 ?? S Tor07am 0:50,19 nfsd:
    > server (nfsd)
    > root 389 1,5 0,0 1412 732 ?? S Tor07am 0:35,06 nfsd:
    > server (nfsd)
    > root 386 1,4 0,0 1412 732 ?? S Tor07am 0:45,38 nfsd:
    > server (nfsd)
    > root 391 1,2 0,0 1412 732 ?? S Tor07am 0:27,78 nfsd:
    > server (nfsd)
    > root 394 1,1 0,0 1412 732 ?? S Tor07am 0:21,18 nfsd:
    > server (nfsd)
    > root 395 1,1 0,0 1412 732 ?? S Tor07am 0:20,38 nfsd:
    > server (nfsd)
    > root 392 1,0 0,0 1412 732 ?? S Tor07am 0:24,99 nfsd:
    > server (nfsd)
    > root 390 1,0 0,0 1412 732 ?? S Tor07am 0:31,39 nfsd:
    > server (nfsd)
    > root 393 0,9 0,0 1412 732 ?? S Tor07am 0:22,27 nfsd:
    > server (nfsd)
    > root 396 0,9 0,0 1412 732 ?? D Tor07am 0:19,31 nfsd:
    > server (nfsd)
    > root 376 0,0 0,0 1540 1032 ?? Is Tor07am 0:00,04 nfsd:
    > master (nfsd)
    >
    >
    >>I think you are disk bound.. You should not be disk bound at this point with a
    >>good RAID controller..
    >
    >
    > Good point, it's an atabeast from nexsan.

    Looks like they are indeed waiting on disk.. You could try making two 6 disk
    raid5 in your controller, then striping those with vinum. That might help.
    Possibly, if your controller supports it, setting up the array as JBOD, and then
    use vinum to build your raid 5 (not sure if it will be faster or not).

    Eric 

    -- 
------------------------------------------------------------------------
Eric Anderson        Sr. Systems Administrator        Centaur Technology
A lost ounce of gold may be found, a lost moment of time never.
------------------------------------------------------------------------
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