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| $Id: README,v 1.1 2000/05/05 19:34:50 whr Exp $ |
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| This file contains some very basic information on: |
| iogen/doio and rwtest |
| growfiles |
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| All tools use the -h flag for printing some form of help (sometimes voluminous). |
| They are extremely configurable; the examples below are some common uses. |
| Read the help and experiment! This testing tools were originally written |
| to test UNICOS's NC1 and IRIX XFS filesystems. |
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| IOGEN & DOIO |
| ============= |
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| This is a pair of programs that does basic I/O operations on a set of files. |
| The file offset, I/O length, I/O operation, and what open(2) flags are |
| selected randomly from a pre-defined or commandline given set. All data |
| written can be verified (this is the usual method). |
| |
| rwtest is a shell script that is a wrapper of iogen and doio. |
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| Examples: |
| --------- |
| # run forever: 8 process - using record locks |
| iogen -i 0 100000b:doio_1 | doio -av -n 8 -m 1000 |
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| # run forever: 8 process - using record locks |
| 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 |
| rwtest -c -i 0 -T 64b 500b:/tmp/rwtest01%f |
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| GROWFILES |
| ============= |
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| Growfiles will create and truncate files in gradual steps using write, and |
| lseek. All system calls are checked for proper returns. The writes or the |
| whole file content can be verified. It can cause disk fragmentation. |
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| Examples: |
| --------- |
| growfiles -E output: |
| # run forever: writes of 4090 bytes then on every 100 iterval |
| # truncate file by 408990 bytes. Done to 200 files in dir1. |
| 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 |
| 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 |
| growfiles -i 0 -g 0 -c 0 -C 0 ocfile |
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| # writes 4096 to files until 50 blocks are written |
| growfiles -i 0 -g 4096 -B 50b file1 file2 |
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| # write one byte to 750 files in gdir then unlinks them |
| growfiles -g 1 -C 0 -d gdir -u -S 750 |
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| # run 30 secs: random iosize, random lseek up to eof |
| # Only valid for one growfile process per file. |
| 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 |
| 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, |
| # rand io types doing a trunc every 5 iterations, with unlinks. |
| growfiles -i0 -r 1-50000 -R 0--2 -I r -C1 -l -n5 -u -U 100-200 gf_rana gf_ranb |
| |
| # run forever: 5 copies of random iosize, random lseek to beyond eof, |
| # random open flags, rand io types doing a trunc every 10 iterations. |
| 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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