Date: Sun, 20 Aug 1995 15:16:12 +0800 (CST) From: Brian Tao <taob@gate.sinica.edu.tw> To: Terry Lambert <terry@cs.weber.edu> Cc: freebsd-hackers@freebsd.org Subject: Re: Making a FreeBSD NFS server Message-ID: <Pine.BSI.3.91.950820150733.17751w-100000@aries> In-Reply-To: <9508191751.AA19996@cs.weber.edu>
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On Sat, 19 Aug 1995, Terry Lambert wrote: > > You can turn on async writes in the BSD NFS server. I tried that out with some dramatic results: (with untweaked kernel) MB reclen bytes/sec written bytes/sec read 1 512 116914 298925 1 1024 150806 234236 1 2048 159973 395922 1 4096 134756 591267 1 8192 124853 630130 2 512 137942 643730 2 1024 127462 514244 2 2048 134486 518215 2 4096 130371 544493 2 8192 130816 522247 [...] (with tweaked kernel) MB reclen bytes/sec written bytes/sec read 1 512 860370 621378 1 1024 798915 729444 1 2048 877240 762600 1 4096 762600 430185 1 8192 854889 710146 2 512 820903 731431 2 1024 801299 619943 2 2048 762600 600526 2 4096 789516 674460 2 8192 836247 719666 [...] > Be warned that, though Sun and SVR4 do this too, this is a cache > coherency violation and can result in Bad Things Happening [...] I think it was Garrett who remarked that the whole idea of stateless NFS was a gross violation of filesystem consistency. ;-) > One alternative is to use NFSv3 on both the client and the server. > This means going all BSD or including OSF/1, Does this include BSD/OS 2.0 as well? -- Brian ("Though this be madness, yet there is method in't") Tao taob@gate.sinica.edu.tw <-- work ........ play --> taob@io.org
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