Is there a document anywhere offering guidance on the optimum use of ext3 filesystems? Googling shows nothing useful and the Linux ext3 FAQ is not very forthcoming. I'm particularly interested in: 1. The effect on performance of large numbers of (generally) small files One of my ext3 filesystems has 750K files on a 36GB disk, and backup with tar takes forever. Even 'find /fs -type f -ls' to establish ownership of the various files takes some hours. Are there thresholds for #files-per-directory or #total-files-per-filesystem beyond which performance degrades rapidly? 2. I have a number of filesystems on SCSI disks which I would like to fsck on demand, rather than have an unscheduled fsck at reboot because some mount-count has expired. I use 'tune2fs -c 0 and -t 0' to do this, and would like to use 'shutdown -F -r 'at a chosen time to force fsck on reboot, and I'd then like fsck to do things in parallel. What are the resources (memory etc) required for parallel fsck'ing? Can I reasonably expect to be able to fsck say, 50 300GB filesystems in parallel, or should I group them into smaller groups? How small? Thanks, Terry. -- _______________________________________________ Ext3-users mailing list Ext3-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/ext3-users
