Hi, I'm not sure I should ask this question here, if this is not the place then I apologize. I have a home made NAS with Linux. I use evms to create volume, put xfs on top of it, and then use samba to share it with Windows clients. When I was using kernel 2.4 with all the needed patches I could get netbench 106Mbps with 4 clients, and 95Mbps with 8 clients. Recently I upgraded the same hardware to kernel 2.6 (I also upgraded the related application such as samba, xfs utility, and dmsetup accordingly). Then I ran netbench again and got 80Mbps with 4 clients, 53Mbps with 8 clients. Which drop almost 80% (95 vs 53) in 8 clients case. I then make and mount xfs on another raid5 (which uses the same disk but on different partitions) and found it got better performance (95Mbps with 4 clients, 85Mbps with 8 clients). In brief: xfs volume on raid5 md/md1 on sda6/sdb6/sdc6/sdd6 netbench: 95/85Mbps xfs volume on EVMS volume /dev/evms/volume1 on raid5 md/md3 on sda8/sdb8/sdc8/sdd8: 80/53Mbps Do you think the slow down (85 to 53Mbps) was caused by device mapper? Please advice. Ken -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 268.2.0/276 - Release Date: 3/7/2006 -- dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
