Hi, I am looking for suggestions on how to increase the speed of our GFS configuration. We are using GFS on a cluster of 4 web servers with a EMC AX150i iscsi server backend. Cluster/GFS is setup and working properly, however it seems to have horrible performance when multiple nodes attempt to create files in the same shared directory. Our application require us to create many small files on the shared drive, which according to this site, http://kbase.redhat.com/faq/FAQ_78_3152.shtm is not the best environment to use GFS. I am exploring alternatives, but if we can get GFS to a point where it's usable, we want to stick with it and hope GFS2 increases the performance even more. I have read through some previous threads and it seems like I can eek some performance by increasing the gfs_scand interval, is that correct? Are there any other settings that would help with performance? System Info: Centos 4.5 kernel 2.6.9-55.0.6.ELsmp GFS-kernel-smp-2.6.9-72.2.0.7 GFS-6.1.14-0 dlm-1.0.3-1 dlm-kernel-smp-2.6.9-46.16.0.8 gfs_tool gettune: ilimit1 = 100 ilimit1_tries = 3 ilimit1_min = 1 ilimit2 = 500 ilimit2_tries = 10 ilimit2_min = 3 demote_secs = 300 incore_log_blocks = 1024 jindex_refresh_secs = 60 depend_secs = 60 scand_secs = 5 recoverd_secs = 60 logd_secs = 1 quotad_secs = 5 inoded_secs = 15 glock_purge = 0 quota_simul_sync = 64 quota_warn_period = 10 atime_quantum = 3600 quota_quantum = 60 quota_scale = 1.0000 (1, 1) quota_enforce = 0 quota_account = 0 new_files_jdata = 0 new_files_directio = 0 max_atomic_write = 4194304 max_readahead = 262144 lockdump_size = 131072 stall_secs = 600 complain_secs = 10 reclaim_limit = 5000 entries_per_readdir = 32 prefetch_secs = 10 statfs_slots = 64 max_mhc = 10000 greedy_default = 100 greedy_quantum = 25 greedy_max = 250 rgrp_try_threshold = 100 statfs_fast = 0 Mital -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
