database & big filesfor raid:mkfs.xfs -d sunit=xxx,swidth=xxx  sunit = strip_size(byte) / 512  swidth = sunit * nr_raid_disksmount option:noatime,nodiratime,allocsize=128M  allocsize help reduce fragmentationfrag check:xfs_bmap /path/to/filexfs_db -c frag -r /dev/sda3defrag:xfs_fsr -t  […]