Jeffrey Altman a écrit : > Sophana wrote: > >> Hi >> >> I'm evaluating openafs 1.4.4 performance on centos 4 >> I noticed some strange things. >> >> I'm doing a simple svn checkout (meaning write to afs) (server on the >> lan) of a lot of source files (quite small...) (about 50mbyte+svn >> overhead ~= 100mbyte) >> When using gkrellm, I can see the disk write bandwidth at at a high >> level (> 15mbyte/s), almost no read, and the network bandwidth is MUCH >> lower (less than 1mbyte/s). It seem that the server is busy making a LOT >> of disk writes, that are about 10 to 20 times the volume of the real >> data being written. >> > > This is only a guess but for every change to a directory the new > directory contents will be written to disk. This is in addition to the > data belonging to the files. > > During parallel compilation (10-12 clients...) I also notice a LOT of writes, almost no read. How is it possible to cache these writes? All this is measured on the server of course.
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