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80 lines
2.7 KiB
80 lines
2.7 KiB
7 months ago
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$Id: README,v 1.1 2001/08/27 22:15:12 plars Exp $
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This file contains some very basic information on:
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iogen/doio and rwtest
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growfiles
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All tools use the -h flag for printing some form of help (sometimes voluminous).
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They are extremely configurable; the examples below are some common uses.
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Read the help and experiment! This testing tools were originally written
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to test UNICOS's NC1 and IRIX XFS filesystems.
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IOGEN & DOIO
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=============
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This is a pair of programs that does basic I/O operations on a set of files.
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The file offset, I/O length, I/O operation, and what open(2) flags are
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selected randomly from a pre-defined or commandline given set. All data
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written can be verified (this is the usual method).
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rwtest is a shell script that is a wrapper of iogen and doio.
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Examples:
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---------
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# run forever: 8 process - using record locks
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iogen -i 0 100000b:doio_1 | doio -av -n 8 -m 1000
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# run forever: 8 process - using record locks
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iogen -i 0 100000b:doio_2 | doio -akv -n 8 -m 1000
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# run forever: max i/o 64b, to /tmp/rwtest01%f, which 500b in size
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rwtest -c -i 0 -T 64b 500b:/tmp/rwtest01%f
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GROWFILES
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=============
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Growfiles will create and truncate files in gradual steps using write, and
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lseek. All system calls are checked for proper returns. The writes or the
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whole file content can be verified. It can cause disk fragmentation.
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Examples:
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---------
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growfiles -E output:
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# run forever: writes of 4090 bytes then on every 100 iterval
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# truncate file by 408990 bytes. Done to 200 files in dir1.
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growfiles -i 0 -g 4090 -T 100 -t 408990 -l -C 10 -c 1000 -d dir1 -S 200
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# same as above with writes of 5000 bytes and truncs of 499990
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growfiles -i 0 -g 5000 -T 100 -t 499990 -l -C 10 -c 1000 -d dir2 -S 200
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# runs forever: beats on opens and closes of file ocfile - no io
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growfiles -i 0 -g 0 -c 0 -C 0 ocfile
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# writes 4096 to files until 50 blocks are written
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growfiles -i 0 -g 4096 -B 50b file1 file2
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# write one byte to 750 files in gdir then unlinks them
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growfiles -g 1 -C 0 -d gdir -u -S 750
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# run 30 secs: random iosize, random lseek up to eof
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# Only valid for one growfile process per file.
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growfiles -r 1-5000 -R 0--1 -i 0 -L 30 -C 1 g_rand1 g_rand2
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# run 30 secs: grow by lseek then write single byte, trunc every 10 itervals
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growfiles -g 5000 -wlu -i 0 -L 30 -C 1 -T 10 g_sleek1 g_lseek2
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# run forever: 5 copies of random iosize, random lseek to beyond eof,
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# rand io types doing a trunc every 5 iterations, with unlinks.
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growfiles -i0 -r 1-50000 -R 0--2 -I r -C1 -l -n5 -u -U 100-200 gf_rana gf_ranb
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# run forever: 5 copies of random iosize, random lseek to beyond eof,
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# random open flags, rand io types doing a trunc every 10 iterations.
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growfiles -i0 -r 1-50000 -R 0--2 -o random -I r -C0 -l -T 20 -uU100-200 -n 5 gf_rand1 gf_rand2
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