Re: Tru64 NFS Performance over UDP is very slow.

From: davegu1 (davegu1_at_hotmail.com)
Date: 05/17/05

  • Next message: Richard Tomkins: "Re: Tru64 NFS Performance over UDP is very slow." 
    Date: 17 May 2005 06:43:14 -0700

    Richard,
    These nics are plugged into a Brocade Switch. I have already checked
    the nics and there are no errors being reported and the network is not
    swamped.

    David

    Richard Tomkins wrote:
    > I wonder if the NIC's are doing a constant re-config.
    >
    > What are thye plugged into? A Switch, a Hub?
    >
    > Maybe you need to set up the configuration of the hardware manually.
    What
    > about MTU sizes being too large? Could the network gear be swamped?
    >
    > "davegu1" <davegu1@hotmail.com> wrote in message
    > news:1115910314.362469.252430@o13g2000cwo.googlegroups.com...
    > > Hello Everyone,
    > > We have the following environment.
    > > Two ES45 with a DEGXA PCI Gigabit Cards as follows:
    > > name = bcm0
    > > category = network
    > > sub_category = Ethernet
    > > model = DEGXA
    > > hardware_rev = BCM5703_C0
    > > firmware_rev =
    > > MAC_address = 00-10-18-0C-4E-39
    > > MTU_size = 1500
    > > media_speed = 1000
    > > media_selection = Automatic
    > >
    > > The NFS Environment we have is clustered running only samba.
    > > The performance in the NFS Cluster is decreasing every day until it
    > > reaches a point in which we have to reboot the cluster once a month
    to
    > > clear out the cache and buffer. Then the services come back fine.
    > > The following errors are constantly logged on to the
    /var/adm/messages
    > > in relation to the
    > >
    > > RFS3_COMMIT
    > > RFS3_READ
    > > RFS3_WRITE
    > > RFS3_GETATTR, client address = xx.xx.xx.xx, errno 70
    > > rfs_dispatch: sendreply failed IP address: xx.xx.xx.xx
    > > rfs_dispatch: sendreply failed IP address: xx.xx.xx.xx
    > > NFS server: stale file handle fs(2554,616540) file 857277 gen 32771
    > >
    > > Our environment consists of over 40 TB of files in data being
    accross
    > > the NFS.
    > > Question:
    > > Is there a problem with the retransmit of large file systems,
    since
    > > most of our file systems are over 2 gig in size.
    > >
    > > Also, while doing some tests internally we noticed the following in
    > > MB/sec and while reading a file on being served by the CFS.
    > >
    > > In server 1 the reads were at 11 and the writes at 25
    > > In server 2 the reads were at 35 and the writes at 25
    > >
    > > Questions:
    > > Can someone tell me what is the high-performance blocksize for NFS
    V3.
    > > If there is a diagram online that will make us understand this
    better
    > > it will be greatly appreciated.
    > >
    > > TIA
    > >
    > > David
    > >
    >
    >
    >
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