Date: Wed, 20 Feb 2008 13:09:48 +0100 From: "Claus Guttesen" <kometen@gmail.com> To: "freebsd-performance@freebsd.org" <freebsd-performance@freebsd.org> Cc: freebsd-questions <freebsd-questions@freebsd.org>, Valerio Daelli <valerio.daelli@gmail.com> Subject: Re: Bad performance of 7.0 nfs client with Solaris nfs server Message-ID: <b41c75520802200409q6de6d87fu1ffd7a2b6c84b346@mail.gmail.com> In-Reply-To: <47BB33AD.1050005@FreeBSD.org> References: <27dbfc8c0802190243y113d3059yd0c602850a4dbd6b@mail.gmail.com> <47BB33AD.1050005@FreeBSD.org>
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> > we have a FreeBSD 7.0 NFS client (csup today, built world and kernel). > > It mounts a Solaris 10 NFS share. > > We have bad performance with 7.0 (3MB/s). > > We have tried both UDP and TCP mounts, both sync and async. > > This is our mount: > > > > nest.xx.xx:/data/export/hosts/bsd7.xx.xx/ /mnt/nest.xx.xx nfs > > noatime,async,-i,rw,-T,-3 > > > > Both our server (7.0 and Solaris 10) are Gigabit Ethernet, both are HP > > Proliant DL360 i386 (NIC bge0): I have a solaris 9 nfs-server (on sparc) with som TB on HDS attached to it with two qlogic-hba's. These partitions are shared to our webservers via nfs, according to my mrtg-graph I get approx. 8 MB/s at peak. I can probably get more but the requirement is not there. With four-way-servers and FreeBSD 6.2 I had a read- and write-size of 8192. I ended up with this size by copying to and from the nfs-server until I didn't get "nfs server not responding; is alive again" message. Then I upgraded to FreeBSD 7.0 in October 2007 on a new eight-way-server I started to get "not responding; alive again" during load. So I decreased rw-size to the current 2048. When I decreased the size I also avoided another problem (by accident :-) ). When uploading images I sometimes saw ImageMagick's convert went into an (almost) infinite loop, comsuming 100 % cpu (on one core) until killed. Reducing the rw-size eliminated this issue. fstab-entry: my.nfs.server:/archive /archive nfs rw,nfsv3,-w=2048,-r=2048 0 0 I'm using udp-mounts, does not appear to change performance for my part. HTH. -- regards Claus When lenity and cruelty play for a kingdom, the gentlest gamester is the soonest winner. Shakespeare
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