On 9/20/07, Spencer Shepler <Spencer.Shepler at sun.com> wrote: > > On Sep 20, 2007, at 6:58 PM, Matty wrote: > > > Howdy, > > > > I have a question for the NFS gurus on the list. We have a number of > > Solaris and Linux NFS clients that need to know when a file on a > > server changes. Currently they are issuing stat() calls to determine > > this, which means we are issuing thousands of NFS operations to > > determine if a given file has changed. Is anyone aware of a method > > that would allow the server to notify the client when a file changes > > (i.e., is there a file events notification facility for NFS)? I > > perused the NFSv4 RFC to see if a file event notification facility > > existed, but I didn't see anything that would do what I wanted (If I > > missed it, please let me know. I will wander off to read). > > NFSv4.1's directory delegations and notifications is what you would > like to have. Directory delegations will take care of the first > order effect of having the client poll via GETATTR for changes. > If there are specific files of interest then notifications can > be more targeted. Although notifications are asynchronous, they > will not be "any worse" than the current polling mechanism in > regards to timeliness but will significantly reduce overhead > throughout.
Sweet! How do you notify the server that a file or directory needs to be placed on the notification list? Any idea when a prototype will be available for us to play with? Thanks, - Ryan -- UNIX Administrator http://prefetch.net
