Re: High traffic NFS performance and availability problems

From: Claus Guttesen (cguttesen_at_yahoo.dk)
Date: 02/18/05

  • Next message: Jeremie Le Hen: "Re: High traffic NFS performance and availability problems" 
    Date: Fri, 18 Feb 2005 09:26:13 +0100 (CET)
To: David Rice <drice@globat.com>, freebsd-performance@freebsd.org

    > We are a web hosting company that runs exclusivly
    > on FreeBSD. We are having
    > storage availability and performance problems. All
    > of our storage is exported
    > via NFS to the client machines Any suggestions or
    > advice will be greatly appreciated.
    >
    > On the file server side we have:
    >
    > Dell PowerEdge 1750's
    > Dell Perc4 RAID controller
    > Dell Power Vault 220 storage shelf.
    > (12) 146GB SCSI drives on one SCSI Bus with a hot
    > spare (~1.3TB file system)
    > GigaBit ethernet to the NFS client machines
    > 1GB RAM
    > (2) 2.4 GHZ Xenon Processors
    > FreeBSD 5.2.1 or FreBSD 5.3
    >
    > On the client side we have:
    >
    > Dell PowerEdge 1750's
    > 1GB RAM
    > (2) 2.4 GHZ Xenon Processors
    > GigaBit ethernet
    > 36GB SCSI root disk
    > FreeBSD 4.9 to FreeBSD 4.11
    >
    > On the network side we have:
    > Gigabit ethernet
    > Foundry BigIron and NetIron swithes
    > Cisco 6509 with Gigabit switch blades
    > We have done the basic NFS tuning
    > (ie: Read write size
    > optimization and kernel tuning)

    You could try to cvsup to the latest RELENG_5 on
    client and server. Are you using udp? Try switching to
    tcp if not, may not apply to 4.x.

    I have nine webservers which nfs-mounts some TB of
    files, not incredible fast but works. All webservers
    are RELENG_5 and nfs-servers are 5.2 current from Feb.
    18'th 2004, 5.3 beta 3 and 5.3 from Dec. 8'th. I will
    upgrade all nfs-servers when RELENG_5_4 is released.

    Claus

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