Reducing file system fragmentation
You can reduce the amount of fragmentation for a file system by issuing the mmdefragfs command, with or without a desired block usage goal.
For example, to reduce the amount of fragmentation for
file system fs1 with a goal of 100% utilization, enter:
mmdefragfs fs1 -u 100Defragmenting file system 'fs1'...
Defragmenting until full block utilization is 98.00%, currently 97.07%
27.35 % complete on Tue May 26 14:25:42 2009 ( 617882 inodes 4749 MB)
82.65 % complete on Tue May 26 14:26:02 2009 ( 1867101 inodes 10499 MB)
89.56 % complete on Tue May 26 14:26:23 2009 ( 2023206 inodes 14296 MB)
90.01 % complete on Tue May 26 14:26:43 2009 ( 2033337 inodes 17309 MB)
90.28 % complete on Tue May 26 14:27:03 2009 ( 2039551 inodes 19779 MB)
91.17 % complete on Tue May 26 14:27:23 2009 ( 2059629 inodes 23480 MB)
91.67 % complete on Tue May 26 14:27:43 2009 ( 2070865 inodes 26760 MB)
92.51 % complete on Tue May 26 14:28:03 2009 ( 2089804 inodes 29769 MB)
93.12 % complete on Tue May 26 14:28:23 2009 ( 2103697 inodes 32649 MB)
93.39 % complete on Tue May 26 14:28:43 2009 ( 2109629 inodes 34934 MB)
95.47 % complete on Tue May 26 14:29:04 2009 ( 2156805 inodes 36576 MB)
95.66 % complete on Tue May 26 14:29:24 2009 ( 2160915 inodes 38705 MB)
95.84 % complete on Tue May 26 14:29:44 2009 ( 2165146 inodes 40248 MB)
96.58 % complete on Tue May 26 14:30:04 2009 ( 2181719 inodes 41733 MB)
96.77 % complete on Tue May 26 14:30:24 2009 ( 2186053 inodes 43022 MB)
96.99 % complete on Tue May 26 14:30:44 2009 ( 2190955 inodes 43051 MB)
97.20 % complete on Tue May 26 14:31:04 2009 ( 2195726 inodes 43077 MB)
97.40 % complete on Tue May 26 14:31:24 2009 ( 2200378 inodes 43109 MB)
97.62 % complete on Tue May 26 14:31:44 2009 ( 2205201 inodes 43295 MB)
97.83 % complete on Tue May 26 14:32:05 2009 ( 2210003 inodes 43329 MB)
97.85 % complete on Tue May 26 14:32:25 2009 ( 2214741 inodes 43528 MB)
97.86 % complete on Tue May 26 14:32:55 2009 ( 2221888 inodes 43798 MB)
97.87 % complete on Tue May 26 14:33:35 2009 ( 2231453 inodes 44264 MB)
97.88 % complete on Tue May 26 14:34:26 2009 ( 2243181 inodes 45288 MB)
100.00 % complete on Tue May 26 14:35:10 2009
free subblk free
disk in full subblk in % %
name blocks blk fragments free blk blk util
before after freed before after before after before after
---------- ----------------------- ----------------- ------------ ------------
nsd32 277504 287840 323 12931 2183 84.69 87.84 96.05 99.33
nsd33 315232 315456 7 580 185 96.20 96.27 99.82 99.94
nsd21 301824 303616 56 2481 666 92.11 92.66 99.24 99.80
nsd34 275904 285920 313 13598 3159 84.20 87.26 95.85 99.04
nsd30 275840 285856 313 13348 2923 84.18 87.24 95.93 99.11
nsd19 278592 288832 320 12273 1874 85.02 88.14 96.25 99.43
nsd31 276224 284608 262 12012 3146 84.30 86.86 96.33 99.04
----------------------- ----------------- ------------
(total) 2001120 2052128 1594 67223 14136 97.07 99.38
Defragmentation complete, full block utilization is 99.04%.See the mmdefragfs command for complete usage information.