On Feb 22, 2007 21:16 +0100, [EMAIL PROTECTED] wrote: > I've been using couple gigabit NIC's (realtek 8169) with Lustre, > was wondering if you can improve (probably can) the wire speeds by using > jumbo frames ?
Yes, this reduces the overhead of the TCP packets noticably. > Do i need to change anything else than mtu of the interface for this to > work? Also the driver supports frames only up to around 7K You quite often need to restart the interface in order to change the MTU. Having an MTU slightly under 8kB means that a send or reply can fit into a 2-page allocation after the TCP/IP/eth headers are added (assuming there is no bug in the code as was the case with e1000 that always allocated 16kB). I don't know the exact MTU size though. Cheers, Andreas -- Andreas Dilger Principal Software Engineer Cluster File Systems, Inc. _______________________________________________ Lustre-discuss mailing list [email protected] https://mail.clusterfs.com/mailman/listinfo/lustre-discuss
