Re: NFS read performance ugliness
Matthias Urlichs (smurf@noris.de)
2 Nov 1998 10:02:18 +0100
I wrote:
> -------Sequential Output-------- ---Sequential Input-- --Random--
> -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
> knfs 350 2421 49.1 4639 11.0 1799 5.1 970 20.4 1027 1.9 32.2 1.2
> 80 2464 49.1 4132 11.2 1655 4.8 1459 30.2 1741 3.3 453.6 9.6
> 70 3057 63.0 4340 12.2 1713 4.3 1848 38.0 3582 6.7 969.6 30.3
> 60 3522 74.4 4184 8.0 2064 5.4 2536 51.3 4946 4.4 376.6 4.4
> 50 2574 52.0 2447 8.1 5735 21.1 4697 91. 187292 98. 4067.4 26.5
50 3688 78.7 7027 13.7 2777 7.7 2092 45.5 5707 12.0 564.1 20.3
The last (new) line is from a client with 20 instead of 64 MBytes. So it
looks like it's definitely a problem with readahead (on the server).
Ideas wanted...
--
Matthias Urlichs | noris network GmbH | smurf@noris.de | ICQ: 20193661
The quote was selected randomly. Really. | http://www.noris.de/~smurf/
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Look to premature senility to save your self-respect.
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