JB <jb.1234abcd <at> gmail.com> writes: > ... These are random ideas for your btrfs test plan. Various tests. - test small and large files, also directories - sequential vs random read/write - cp, mv, rm - do not forget to use 'sync' where appropriate in your tests sync(1) - with and without cache (to catch behavior and differences that are not representative of the fs itself) http://linux-mm.org/Drop_Caches # sync && echo n > /proc/sys/vm/drop_caches where n=0,1,... Do simple tests (cp, mv, rm) with sufficiently large files. - throughput (small, medium, large files) - fragmentation NOTE: this is/was the point of distress for btrfs - see web links: https://lkml.org/lkml/2010/6/18/144 http://www.ilsistemista.net/index.php/linux-a-unix/6-linux-filesystems-benchmarked-ext3-vs-ext4-vs-xfs-vs-btrfs.html - turn off any online filesystem defragmentation to prevent interference - test as in https://lkml.org/lkml/2010/6/18/144 - other test Let's make a 100 GB partition harddisk half full with files (small, medium, and big). Turn off read cache: - echo n > /proc/sys/vm/drop_caches Read many and different big files (never the same: see prevent kernel read caching): (100-600 MB) off the drive and time it: $ time cat bigfile1 > /dev/null $ time cat bigfile2 > /dev/null ... If the time range is wide, it is indicative of fs files fragmentation. Reliability test. - power down disks on a busy filesystem and see what's left - quality of repair and recovery tools - consider what ZFS testers did: http://blogs.oracle.com/bill/entry/zfs_and_the_all_singing http://hub.opensolaris.org/bin/view/Community+Group+zfs/zfstestsuite Btrfs and NFS. - perform client/server tests on nfs-mounted btrfs file systems System entries. - cfdisk, fdisk, parted, gparted, etc - ... Testing tools. - Linux Test Tools Filesystems http://ltp.sourceforge.net/tooltable.php - Linux Filesystem Testing Tools http://linuxpoison.blogspot.com/2008/07/linux-filesystem-testing-tools.html - Linux Filesystem Benchmark using Blogbench http://linuxpoison.blogspot.com/2010/08/linux-filesystem-benchmark-using.html JB -- test mailing list test@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe: https://admin.fedoraproject.org/mailman/listinfo/test
