[CentOS] RE: [Iscsitarget-devel] Performance Question
Ross S. W. Walker
rwalker at medallion.comThu Feb 14 00:26:12 UTC 2008
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Joseph L. Casale wrote: > > >Yes, jumbo frames, no irq coalescence, blockio and see if > >you can get Backup Exec to use large io request sizes when > >reading and writing the data. The larger the better. > > Ok, Jumbo's enabled on the switch and media server. For the > sake of our sanity jumping back and forth, I am trying to > enable jumbo's on the bonded pair in the target, # ifconfig > bond0 mtu 9014 and it errors out? Any idea what I am doing wrong? Yeah, it's MTU 9000 on Linux, Linux adds 14 byte ethernet frame by default (standard MTU is actually 1514). > Also, where do I tune irq coalescence? It can be done through ethtool if the cards are supported, or sometimes it needs to be done on mod load. Which card? -Ross ______________________________________________________________________ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof.
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