On Nov 22, 2010, at 7:11 PM, Andrew Deason wrote: > On Mon, 22 Nov 2010 18:00:41 +0100 > Achim Gsell <[email protected]> wrote: > >> Hi, >> >> bonnie++ on OpenAFS with sizes above 8192 behaves strange on my Linux >> systems: after writing up to 5-7 files with 1GB each, write >> performance drops from 50-60 MB/s to around 3MB/s. > > Is this writing to several files sequentially? Or do you mean bonnie++ > writes has about 5-7 files open at the same time, and has written about > 1G into each?
I mean the latter. If you start bonnie++ with -s 8192 it opens 8 files and starts writing sequentially to these files: the first file will be filled with 1 GB then the second and so on. > If the latter (or regardless), I'd try increasing the size > of the cache; since you're seeing traffic across the network, I'd > suspect you're thrashing. Trashing? Mmh. I can write 8 1 GB in parallel with dd without problems ... > If you feel like sharing a network dump of the > traffic when the problem occurs (probably not to the list), we could > tell you what it all is. I will store a network dump in my public AFS directory and tell you as soon as I have it - may take some time ... Achim_______________________________________________ OpenAFS-info mailing list [email protected] https://lists.openafs.org/mailman/listinfo/openafs-info
