Hi, On Thu, 2009-04-23 at 17:09 +0200, Mikołaj Radzewicz wrote: > Hello again, > I'm planning to run GFS cluster of two nodes on some SAN storage over > fabric - 4TB ( 5 disk in RAID 5 - with stripe 128k). I'm having some > mixed feelings about setting the GFS block size for my fs... > > The nodes are going to hold some WWW files (let say for video streaming) > which can be divided in 3 main groups: > 1/3 files smaller 100K > 1/3 files about 1M > 1/3 files about 2M > > I used to use a GFS block size of 4K - the default one but now I'm > wondering of changing it to some greater value like 16K. Does it make > sense and I will be able to notice some performance benefits?? On the > other hand I have read that changing default 4K for GFS isn't advisable. > > btw: if it makes some difference some directoris must contain about 50K > files... > 4k is the largest block size available as we don't support block sizes greater than the page size, so I'd stick with 4k for now. 50k files should be ok in a single directory. Of more importance is the access pattern (particularly creates and deletes) from the different nodes within single directories, Steve. -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
