DV4 mounting JR4 over NFS and doing a simple stream copy

This is what our tagline of Simply Faster means. The performance is there, and is simple to use.

See below.

On DV4

root@dv4:~# mount -o intr,rsize=262144,wsize=262144,tcp 10.1.3.1:/data /data2

root@dv4:~# ls -alF /data2
total 67108868
drwxr-xr-x  2 root root          21 2009-07-10 11:01 ./
drwxr-xr-x 23 root root        4096 2009-07-10 17:18 ../
-rw-r--r--  1 root root <strong>68719476736</strong> 2009-07-10 13:07 big.file

root@dv4:~# dd if=/data2/big.file of=/dev/null bs=16M
4096+0 records in
4096+0 records out
68719476736 bytes (69 GB) copied, 110.876 s, 620 MB/s

and on the JR4

[root@jr4s ~]# cat /etc/exports 
/data 10.1.0.0/255.255.0.0(rw,no_root_squash,async,no_subtree_check)

Caching impacts not relevant, as the 69GB is larger than both the JR4 and DV4 ram, and the disk on the JR4 feeding this DV4 over NFS is so much faster than the fabric, that storing it in ram wouldn’t do much, even if you could fit it all in.

No tuning on the 10 GbE cards, this bit rate is roughly half what they can do. Will be working to get over 1 GB/s NFS later on this weekend.

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