Re: [xen-discuss] bad nfs performance with opensolaris dom0 server and ubuntu intrepid domu client

Thu, 16 Apr 2009 12:19:57 -0700 


Robert Murray wrote:

Hi


I am trying to track down a problem with nfs performance between an opensolaris nfs server in dom0 and an ubuntu pv domu client. I would be 
gratefull for any tips on how to identify the problem.

.
I have /home from the opensolaris dom0 mounted as /home in the ubuntu domu.  
Read performance on the client is very slow:



Did you try mounting with nfsv3 or nfsv2?  Is it using tcp or udp?



MRJ




rob...@ubuntu:~$ dd if=intrepid-desktop-i386.iso  of=/dev/null
1424672+0 records in
1424672+0 records out
729432064 bytes (729 MB) copied, 1389.73 s, 525 kB/s
rob...@ubuntu:~$ dd if=intrepid-desktop-i386.iso  bs=32k=32k 
of=/dev/null
22260+1 records in
22260+1 records out
729432064 bytes (729 MB) copied, 1376.52 s, 530 kB/s
rob...@ubuntu:~$ ifconfig eth0

eth0      Link encap:Ethernet  HWaddr 00:16:3e:52:b7:35  
          inet addr:10.0.0.2  Bcast:10.0.0.255  Mask:255.255.255.0

          inet6 addr: fe80::216:3eff:fe52:b735/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:3425312 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2270502 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000 
          RX bytes:4775043508 (4.7 GB)  TX bytes:1016651840 (1.0 GB)
          Interrupt:9 


rob...@ubuntu:~$ dd if=intrepid-desktop-i386.iso  bs=32k of=/dev/null
22260+1 records in
22260+1 records out
729432064 bytes (729 MB) copied, 1395.64 s, 523 kB/s
rob...@ubuntu:~$ ifconfig eth0

eth0      Link encap:Ethernet  HWaddr 00:16:3e:52:b7:35  
          inet addr:10.0.0.2  Bcast:10.0.0.255  Mask:255.255.255.0

          inet6 addr: fe80::216:3eff:fe52:b735/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:3937117 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2547334 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000 
          RX bytes:5534387560 (5.5 GB)  TX bytes:1036869559 (1.0 GB)
          Interrupt:9 


It is much faster if I use cifs:

dd if=intrepid-desktop-i386.iso  bs=32k of=/dev/null
22260+1 records in
22260+1 records out
729432064 bytes (729 MB) copied, 13.0277 s, 56.0 MB/s

Regards

Robbie

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