Hi all, I am doing some postmark tests with gfs2 on a 2 node cluster using a iSCSI partition on a SAN device configured in multipath Im using 2 path in multipath and my multipath config is http://pastebin.com/me4facbb My multipath is using 2 Intel NIC (one onboard eth1 and one external eth2) which are conected to decdicated managed switch(HP) Im using iscsi-initiator-utils-6.2.0.870 and my iscsi Node conf. is # iscsiadm -m node 172.16.1.252:3260,1 iqn.1994-04.jp.co.xxxxxx:rsd.d7x.t.10126.0a000 172.16.2.252:3260,1 iqn.1994-04.jp.co.xxxxxx:rsd.d7x.t.10126.0b000 The primary NIC (eth0) is used for cluster setup and fencing which is on different nerwork other than multipath interface My kernel is 2.6.27.9 on a 64 bit system with cluster-2.03.10 and openais-0.80.3 installed from source on a centos 5.2 final box I have created GFS patition on the Iscsi disk using mkfs -t gfs2 -p lock_nolock -t alpha:gfs -j 4 /dev/mapper/disk1 And My cluster.conf is at http://pastebin.com/m209d6124 My postmark config is at http://pastebin.com/m76ba067 which creates and reads Huge no of files GFS2 is mounted with options "/gfsmount type gfs2 (rw,noatime,nodiratime,localflocks,localcaching)" Actually there are 25 postmark procs each writing and reading to their own locatioons in the same gfs2 mount from a single machine Im using lock_nolock but i have a feeling that locking is still taking place A lockdump shows zillions of entries like - H: s:SH f:EH e:0 p:4461 [postmark] gfs2_inode_lookup+0x113/0x1f5 [gfs2] and performance is too slow Lockdump result for above 2 test are similar and be seen at http://203.199.107.58/lockdump.txt The Result of GFS with dlm_lock is http://203.199.107.58/Iteration-1-Test2-gfs2-lock_dlm.html The Result of GFS with nolock and demote_secs set to 86400 is http://203.199.107.58/Iteration-1-Test2-gfs2-lock_nolock.html The Result for ext3 is at http://203.199.107.58/Iteration-1-Test2-ext3.html I have verified the glock trimming patch is applied to the code I have read reports saying GFS2 gives 95% of ext3 performance but my setup doesn't seem to get anywhere closer Any suggestions/tips on what i might be doing wrong ? Regards Jeetendra -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
