[Linux-cluster] Is nit worth setting up jumbo Ethernet frames on the cluster interconnect link?

[Jeff Sturm]

You probably wouldn't gain much, if anything.  I see packets averaging
around 130-160 bytes in size on one of our clusters.  Fewer than 1% of
packets are greater than 1400 bytes in size.

 

On the other hand, if you are using Ethernet for storage, you almost
certainly want jumbo frames on any such interfaces.

 

Jeff

 

From: linux-cluster-bounces at redhat.com
[mailto:linux-cluster-bounces at redhat.com] On Behalf Of Jankowski, Chris
Sent: Friday, April 02, 2010 7:27 AM
To: linux clustering
Subject: [Linux-cluster] Is nit worth setting up jumbo Ethernet frames
on the cluster interconnect link?

 

Hi,

 

On a heavily used cluster with GFS2 is it worth setting up jumbo
Ethernet frames on the cluster interconnect link?  Obviously, if only
miniscule portion of the packets travelling through this link are larger
than standard 1500 MTU then why to bother.

 

I am seeing significant traffic on the link up to 50,000 packets per
second.

 

Thanks and regards,

 

Chris

 

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