Valerio Daelli wrote:
Hi listwe 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): --- FreeBSD 7.0: [EMAIL PROTECTED] ~]$ uname -a FreeBSD bsd7.xx.xx 7.0-RC2 FreeBSD 7.0-RC2 #1: Mon Feb 18 17:46:46 CET 2008 [EMAIL PROTECTED]:/usr/obj/usr/src/sys/BSD7 i386 --- This is our performance with iozone: command line: iozone -+q 1 -i 0 -i 1 -n 2048 -g 2G -Raceb iozone.xls -f /mnt/nest.xx.xx/iozone.bsd7/iozone.tmp FreeBSD 7: File stride size set to 17 * record size. random random bkwd record stride KB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 2048 1024 109883 101289 769058 779880 2048 2048 3812 3674 760479 767066 4096 1024 111156 106788 724692 728040 4096 2048 3336 2241 157132 733417 4096 4096 2829 3364 699351 699807 As you can see, while with record length less than 1024KB the speed is 'fast', with record of 2048 or more (I've tried with record much bigger) we get only 3 MB/s. Is this a known issue? If you need more details please contact me, I am willing to do more tests to risolve this problem.
Can you characterize what is different about the NFS traffic when FreeBSD and Solaris are the clients? Does other network traffic to the server perform well? 2048 bytes records are > the 1500 byte MTU, so you will be invoking packet fragmentation and reassembly. Maybe you are getting packet loss for some reason. What does netstat say about interface errors on the bge, and for the protocol layers?
Follow-ups set to performance@ Kris _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-performance To unsubscribe, send any mail to "[EMAIL PROTECTED]"
