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Article #137Re: NFS sucks (was Re: Pentium-90 box for Linux?)
From: Larry McVoy
Date: Wed, 22 Feb 1995 02:30
Date: Wed, 22 Feb 1995 02:30
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2245 bytes
: NFS has no coherency support anyway unless locking and rpc.lockd is : supported. This is not completely true. NFS has always had what they call open-to-close cache consistency. That means that if someone opens the file, modifies, and closes it, then someone else should so those changes if they open the file immediately after that on another machine. It means that you have to stat() the file attributes each time a client opens the file. People play games with this rule but that is a minimum that an implementation should provide. : Secondly there are methods (good methods too) of doing non-local : caches including cache leasing methods where a client caches data and the : server revokes the cache grant when the data changes. NFS v2 is not : a good file protocol anyway Well, it kind of works. I use it all the time. I agree that it could be better. I think that the leases that Rick added in his BSD based NFS implementation might be a good feature for Linux. -- --- Larry McVoy (415) 390-1804 lm@sgi.com
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 1103af,a85ac670e4194595 X-Google-Attributes: gid1103af,public X-Google-Thread: 102983,a85ac670e4194595 X-Google-Attributes: gid102983,public X-Google-Thread: 100b1f,a85ac670e4194595 X-Google-Attributes: gid100b1f,public X-Google-ArrivalTime: 1995-02-21 20:04:56 PST Path: arc1-ca.pugleaf.net!nntp.gmd.de!stern.fokus.gmd.de!ceres.fokus.gmd.de!zib-berlin.de!news.mathworks.com!zombie.ncsc.mil!news.duke.edu!convex!cs.utexas.edu!swrinde!sgiblab!sgigate.sgi.com!fido.asd.sgi.com!slovax!lm From: lm@slovax.engr.sgi.com (Larry McVoy) Newsgroups: comp.os.linux.help,comp.os.linux.misc,aus.computers.linux Subject: Re: NFS sucks (was Re: Pentium-90 box for Linux?) Followup-To: comp.os.linux.help,comp.os.linux.misc,aus.computers.linux Date: 22 Feb 1995 02:30:36 GMT Organization: Silicon Graphics Inc., Mountain View, CA Lines: 23 Message-ID: <3ie7kc$60t@fido.asd.sgi.com> References: <1995Feb13.020829.14593@rd.scitec.com.au> <3hmn0t$kp7@harbinger.cc.monash.edu.au> <3hngrg$s86@inferno.mpx.com.au> <D45F9z.1oy@info.swan.ac.uk> Reply-To: lm@slovax.engr.sgi.com NNTP-Posting-Host: slovax.engr.sgi.com X-Newsreader: TIN [version 1.2 PL2]