OpLkBkDelayedBreak is when an oplock break is sent too soon after an open request completes, some clients lock up. This variable counts the number of times that Data ONTAP must delay before sending an oplock break. The delay is controlled by the cifs.oplocks.opendelta option.

In case you need a definition of oplock here it is: Oplocks (opportunistic locks) enable a CIFS client in certain file-sharing scenarios to perform client-side caching of read-ahead, write-behind, and lock information. A client can then read from or write to a file without regularly reminding the server that it needs access to the file in question. This improves performance by reducing network traffic.

The NOW site has some fairly simplistic documentation into CIFS Performance Tuning.

Alan

-----Original Message----- From: owner-toasters@mathworks.com [mailto:owner-toasters@mathworks.com] On Behalf Of Simon Waters Sent: Friday, April 29, 2005 6:04 AM To: toasters@mathworks.com Subject: SMB tuning/understanding

Pondering some Microsoft tuning guidelines in one window, and the Filer report in another.

What is "OpLkBkDelayedBreak"?

And better yet where do I find an idiots guide to the innards of Microsofts networking? ***************************************************************************************************** If you have received this email in error please notify the the system manager or the sender immediately and do not disclosed the to anyone or make copies.

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