thanks erik, > the "t" bit that 9front added how to do? I don't know this one.
I analyzed map area in fscache and then found: corresponding worm blocks of dirty cache blocks are garbage. On 2013/03/05, at 15:22, erik quanstrom <[email protected]> wrote: > On Tue Mar 5 01:03:23 EST 2013, [email protected] wrote: >> Hello, >> >> It seems my cwfs has too many dirty blocks. >> cfws command ("dump", "check tag" and etc) is no help to decrease these >> blocks. >> is this only to me? > > i have not seen this with kenfs. is it possible that you > are using the "t" bit that 9front added? if so, that would > explain all the dirty blocks that never get dumped. > one also ends up with dirty superblocks that can't get > dumped because they're already written, about 1 per > day in the dump. > > one thing i notice about your cache-worm is that the > cache is very large. this is not advisable because your > cache buckets will take up too many memory buffers, > leaving little for actual data. 20G cache has been > enough. the first big file server i set up had 750G > cache, and it thrashed the heck out of its disks. > > - erik >
