Hello all, I am benchmarking OCFS2 in a single node environment to see how its performance stacks up against other Linux file systems. My hardware is dual CPU, 6-cores per CPU, 2.4GHz Westmere with 24GB RAM. My system has 24 HDD's of which 23 are active drives in a md RAID 5 array with 64K chunk size, and one hot-spare. I have a LVM2 volume created out of this md array. It is running Linux 2.6.38 kernel.
I am creating the OCFS2 file system as follows: /sbin/mkfs.ocfs2 -N 2 -M local --fs-features=sparse,refcount,xattr,indexed-dirs,discontig-bg,inline-data -F /dev/md0/ocfs2max I am then mounting it as: /bin/mount /volumes/md0/ocfs2max I am using fio 1.55 to measure performance. My benchmark script uses uncached IO in 4K and 4M block sizes. I am running 8 fio jobs and 512 IO depth. I am using a 20GB file as the test file for this benchmark. OCFS2 reads (both at 4M and 4K) are very good...within +-3% of the other major Linux file systems. However, 4K writes are substantially lower, about half the speed of other Linux FS's. Can you provide some recommendations on how I can improve the write speed with OCFS2? At the current write rate, the trade-off is too much, but I really like the other features of OCFS2 so I am hopeful that some tuning/tweaking will get the performance up where it needs to be. Thank you very much in advance! - TG _______________________________________________ Ocfs2-users mailing list Ocfs2-users@oss.oracle.com http://oss.oracle.com/mailman/listinfo/ocfs2-users
