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- Path: sparky!uunet!mcsun!uknet!strath-cs!baird!jim
- From: jim@cs.strath.ac.uk (Jim Reid)
- Newsgroups: comp.protocols.nfs
- Subject: Re: what locking techniques work over NFS?
- Message-ID: <JIM.92Jul31105352@hunter.cs.strath.ac.uk>
- Date: 31 Jul 92 09:53:52 GMT
- References: <1992Jul30.021633.11818@philips.oz.au> <biUZ?6$U@twinsun.com>
- Sender: news@cs.strath.ac.uk
- Organization: Computer Science Dept., Strathclyde Univ., Glasgow, Scotland.
- Lines: 11
- Nntp-Posting-Host: hunter
- In-reply-to: eggert@twinsun.com's message of 31 Jul 92 00:39:03 GMT
-
- Another point which has been overlooked is that file attribute
- cacheing by clients and servers mean that there is a sizeable window
- when two machines may see a different picture of the same directory:
-
- Client A reads a directory
- Client B creates the lock file in that directory
- A checks the directory for the lock file, but gets the answers
- from its file attribute cache instead of from the file server.
- Since A sees no lock file.....
-
- Jim
-