[Beowulf] What are people seeing performance-wise for NFS over 10GbE

Li, Bo libo at buaa.edu.cn
Thu Feb 28 19:14:43 EST 2008


Just a silly question, Is there anybody got the similiar benchmark for Samba or Windows file sharing? 
Regards,
Li, Bo
----- Original Message ----- 
From: "Joe Landman" <landman at scalableinformatics.com>
To: "Beowulf Mailing List" <beowulf at beowulf.org>
Sent: Thursday, February 28, 2008 9:53 PM
Subject: [Beowulf] What are people seeing performance-wise for NFS over 10GbE


> Hi folks:
> 
>   Have a few simple setups that I am trying to figure out if I have a 
> problem, or if what I am seeing is normal.
> 
>   Two 10 GbE cards, connected with a CX4 cable.  Server is one of our 
> JackRabbits, with 750+ MB/s direct IO and 500-650 MB/s buffered IO 
> (read-write), for IO about 10x system ram (~100x RAID cache).
> 
>   Getting ok iperf numbers, about 7 Gb/s single thread.  Running NFS, 
> and seeing ~200-300 MB/s best case between the systems.  Is this what 
> others have seen?  Latest drivers from vendor, sent a note to them to 
> see if we can figure this out.  Figured I would tap into the 'wulf 
> collective memory to learn what other people see.
> 
>   2.6.23.14 kernel on both sides, jumbo frames enabled. No switch, just 
> a CX4 cable.
> 
>   My expectations are that we would be able to see 80-90% of the 
> JackRabbits speed, with the rest being eaten by stack issues.  This is 
> the case over channel bonded GbE.
> 
>   Do you see 500 MB/s or more?  Less?
> 
>   Thanks.
> 
> Joe
> 
> -- 
> Joseph Landman, Ph.D
> Founder and CEO
> Scalable Informatics LLC,
> email: landman at scalableinformatics.com
> web  : http://www.scalableinformatics.com
>        http://jackrabbit.scalableinformatics.com
> phone: +1 734 786 8423
> fax  : +1 866 888 3112
> cell : +1 734 612 4615
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