search for: specsf

Hi, We are currently doing SpecSFS comparison benchmarking to evaluate advantages of FS journaling to NVRAM card versus journaling to hard disks. We compare NFS performance for Linux file server with ext3 file system in ?data=journal? mode for three different locations of the file system journal: - inside main file system - o...

...e benchmarking results: ext3 with internal log performs 3 times faster then with external log. Linux ES 3.0 (kernel 2.4.21-9.0.1ESsmp), Dell PE 2600, 2 CPU 2.4GHz, 6GB RAM, Adaptec Ultra 160 SCSI 29160 controller External hardware 9-disk RAID 0; 512MB write-back controller cache; U160 Benchmark: SpecSFS v 3.0 Mount options: data=journal,sync, Export options: sync, With ext3 FS on external 9-disk RAID 0 internal log ~ 3000 NFS Ops/sec external log on a second partition on the same RAID 0 ~ 1000 Ops/sec external log on a dedicated HD (without write-back cache) or NVRAM card ~ 10...

...... and funny you should ask... we''re working on it right now, here''s the bug: http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6344186 As for NFS on ZFS performance, that is also being actively worked on - one bug in particular that''s holding back (at least) specSFS results is: http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6350001 6350001 improves lookup performance, and should be putback very soon. Neil has some ZIL and range lock changes coming, Matt and Noel have some ZAP perf changes in the pipeline, and Mark''s ARC changes are goi...