On Sat, Jun 30, 2007 at 07:33:19PM -0400, Jason Morgan wrote: > On Sat, Jun 23, 2007 at 07:42:24PM -0400, Jason Morgan wrote: > > On Sat, Jun 23, 2007 at 12:46:27PM -0700, Michael Smith wrote: > > > Hello Jason: > > > > > > On Jun 23, 2007, at 9:34 AM, Jason Morgan wrote: > > > > > > >I've been having some trouble with NFS performance for some time and > > > >now that class is out, I've had a bit of time to investigate but I'm > > > >stuck. Below are the details of my investigation. Hopefully, someone > > > >here can give me some advice. > > > > > > > >The basic problem is that my NFS performance is very slow. Right now, > > > >I am connecting two workstations to a NFS server, which has my home > > > >directory, etc, mounted. They are connected over a gigabit network > > > >(right now with mtu set to 7000, which is supported by all hardware -- > > > >changing it to 1500 has no effect on performance, which is > > > >strange). Each system is running 6.2-RELEASE or -STABLE. Each system > > > >is also using the following network card: > > > > > > > ># ifconfig sk0 > > > >sk0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 7000 > > > > options=b<RXCSUM,TXCSUM,VLAN_MTU> > > > > inet 10.0.0.2 netmask 0xffffff00 broadcast 10.0.0.255 > > > > ether 00:17:9a:bb:05:87 > > > > media: Ethernet autoselect (1000baseTX <full- > > > >duplex,flag0,flag1>) > > > > status: active > > > > > > > ># dmesg | grep sk > > > >skc0: <D-Link DGE-530T Gigabit Ethernet> port 0xec00-0xecff mem > > > > 0xfdff8000-0xfdffbfff irq 18 at device 10.0 on pci0 > > > >skc0: DGE-530T Gigabit Ethernet Adapter rev. (0x9) > > > >sk0: <Marvell Semiconductor, Inc. Yukon> on skc0 > > > >sk0: Ethernet address: 00:17:9a:XX:XX:XX > > > > > > > >## Server /etc/rc.conf settings > > > > > > > >rpcbind_enable="YES" > > > >rpc_lockd_enable="YES" > > > >rpc_statd_enable="YES" > > > >nfs_server_enable="YES" > > > >nfs_server_flags="-u -t -n 12" > > > >nfs_bufpackets="32" > > > >mountd_flags="-r" > > > > > > > > > > > >## Client /etc/rc.conf settings > > > > > > > >nfs_client_enable="YES" > > > >nfs_bufpackets="32" > > > >nfsiod_enable="YES" > > > >nfsiod_flags="-n 6" > > > >rpc_lockd_enable="YES" > > > >rpc_statd_enable="YES" > > > >rpcbind_enable="YES" > > > > > > > >## /etc/exports > > > > > > > >/usr -alldirs,maproot=root client1 client2 > > > > > > > > > > > >For performance benchmarking, I am using dd. Locally from the server, > > > >this is a representative result when writing a 1GB file: > > > > > > > >## Local write test (for an upper-bound on what to expect). > > > > > > > ># dd if=/dev/zero of=./nfs.dat bs=1024k count=1000 > > > >1000+0 records in > > > >1000+0 records out > > > >1048576000 bytes transferred in 19.580184 secs (53552919 bytes/sec) > > > > > > > >Connecting from a client (both clients get approximately the same > > > >results). > > > > > > > >## Remote connection (UDP), mounted in /etc/fstab as with flags: > > > >## rw,-U,-3,-r=32768,-w=32768 > > > > > > > ># dd if=/dev/zero of=./nfs.dat bs=1024k count=1000 > > > >1000+0 records in > > > >1000+0 records out > > > >1048576000 bytes transferred in 101.151139 secs (10366428 bytes/sec) > > > > > > > >## Remote connection (TCP), mounted in /etc/fstab as with flags: > > > >## rw,-T,-3,-r=32768,-w=32768 > > > > > > > ># dd if=/dev/zero of=./nfs.dat bs=1024k count=1000 > > > >1000+0 records in > > > >1000+0 records out > > > >1048576000 bytes transferred in 59.668585 secs (17573334 bytes/sec) > > > > > > > >As can be seen above, TCP is much faster than UPD. I have tried many > > > >different mount settings and these are the best results I could > > > >get. To test whether or not I have having network issues, I > > > >transferred the same nfs.dat file via a http connection and got > > > >~32MB/sec -- almost 2x the speed of the TCP NFS connection. 32MB/sec > > > >is about what I would expect given that my fastest write speed is > > > >~50MB/sec. > > > > > > > >At this point I am stumped. I have tried increasing/changing the > > > >number of nfsiod servers as well as nfs_bufpackets. No matter what > > > >settings I change, the results are always the same. I get only two > > > >errors, first on /var/log/messages on the server I have just begun > > > >seeing: > > > > > > > >Jun 22 21:13:47 crichton routed[666]: sendto(dc1, 224.0.0.2): > > > >Operation not permitted > > > >Jun 22 21:13:47 crichton routed[666]: sendto(sk0, 224.0.0.2): > > > >Operation not permitted > > > >Jun 22 21:13:50 crichton routed[666]: sendto(dc1, 224.0.0.2): > > > >Operation not permitted > > > >Jun 22 21:13:50 crichton routed[666]: sendto(sk0, 224.0.0.2): > > > >Operation not permitted > > > > > > > >This appeared after I added a route; however, I added the route after > > > >many of the tests were done. I get the same results now as before the > > > >new route. On one of the clients (the one running 6.2-RELEASE-p1), I > > > >also get a nasty error: > > > > > > > >nfs/tcp clnt: Error 60 reading socket, tearing down TCP connection > > > > > > > >This cropped up last night after I tweaked some settings. They have > > > >now been changed back, but I still get this error. The other client is > > > >unaffected. > > > > > > > >I appreciate any help people can provide on tracking down the > > > >issues. Sorry about the long email -- just trying to be thorough. Of > > > >course, I've searched the Internet and can't find any clear assistence > > > >on these issues. > > > > > > > >Cheers, > > > >~Jason > > > > > > > We use the following settings on a mail cluster that's pushing about > > > 50 MB/sec sustained. > > > > > > 10.211.1.213:/m0 /mail/m0 nfs > > > rw,tcp,intr,noatime,nfsv3,-w=65536,-r=65536 > > > > > > # NFS Server > > > rpcbind_enable="YES" > > > rpc_lockd_enable="YES" > > > rpc_statd_enable="YES" > > > nfs_server_enable="YES" > > > nfs_server_flags="-u -t -n 16 -h 10.211.1.213" > > > mountd_flags="-r" > > > > > > I would imagine the larger read/write values above would be fine for > > > you as well, given you have Gigabit links. The 'noatime' setting may > > > be problematic depending on your application. You might want to > > > Google specifics on what applications use atime to see if that's a > > > good flag for you or not. > > > > > > I'd love to see your results if you decide to test those settings > > > offline. > > > > > > Regards, > > > > > > Mike > > > > Mike, thank you for the advice. I followed it, but didn't make much > > progress. I am still pushing the same ~17M/sec. I did mess with > > net.inet.tcp.sendspace and net.inet.tcp.recvspace some and managed to > > get a couple more MB/sec out of the connection, but not much > > else. It's quite possible I am missing something obvious. > > I'm still completely stuck on this. I wasn't able to get any better > performance out of NFS from the suggestions above. Thought maybe it > was a problem with my 6.2-RELEASE machines (though I had no evidence > that it was). I decided to update all machines to -STABLE. As I > suspected, no luck. Anyone have any other suggestions?
Sorry to resurrect this old thread, but it contains a lot of pertinent detail and I have yet -- after many hours of messing with my setup -- to come up with a solution. Any help would be greatly appreciated. ~Jason _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
