42 lines
1.6 KiB
Text
42 lines
1.6 KiB
Text
This utility can be used to test performance of storage devices.
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First, one need to generate file with I/O operations:
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# set mediasize=`diskinfo /dev/<device> | awk '{print $3}'`
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# set sectorsize=`diskinfo /dev/<device> | awk '{print $2}'`
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# raidtest genfile -s $mediasize -S $sectorsize -n 50000
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It will generate test which contains 50000 I/O requests with random
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size and random offset. Size is a multiple of sectorsize, but less than or
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equal to 128kB (maxium size of I/O request). I/O request type (READ or WRITE)
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is random as well.
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All test data are stored in 'raidtest.data' file in current working directory.
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To run test, one should type:
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# raidtest test -d /dev/<device> -n 10
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This command will read test data from 'raidtest.data' file, run 10 processes
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which will be used to send requests to the given device in parallel.
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When test is finished you will see statistics:
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Bytes per second: <x>
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Requests per second: <y>
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If you compare performance of two storage devices, use the same data file!
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usage: raidtest genfile [-frw] <-s mediasize> [-S sectorsize] <-n nrequests> [file]
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raidtest test [-Rrw] <-d device> [-n processes] [file]
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where:
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-d device path to tested device
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-f if raidtest.data file or specified file already exists,
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remove it and create new one
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-n nrequests number of requests to generate
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-n processes number of processes to run
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-r generate/run only READ requests
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-R generate random data for write requests
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-s size of destination device
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-S sector size of destination device
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-w generate/run only WRITE requests
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file path to the data file instead of default 'raidtest.data'
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