Databases Reference
In-Depth Information
seqwr
Sequential write
seqrewr
Sequential rewrite
seqrd
Sequential read
rndrd
Random read
rndwr
Random write
rndrw
Combined random read/write
The following command runs the random read/write access file I/O benchmark:
$
sysbench --test=fileio --file-total-size=150G --file-test-mode=rndrw/
--init-rng=on --max-time=300 --max-requests=0 run
Here are the results:
sysbench v0.4.8: multithreaded system evaluation benchmark
Running the test with following options:
Number of threads: 1
Initializing random number generator from timer.
Extra file open flags: 0
128 files, 1.1719Gb each
150Gb total file size
Block size 16Kb
Number of random requests for random IO: 10000
Read/Write ratio for combined random IO test: 1.50
Periodic FSYNC enabled, calling fsync() each 100 requests.
Calling fsync() at the end of test, Enabled.
Using synchronous I/O mode
Doing random r/w test
Threads started!
Time limit exceeded, exiting...
Done.
Operations performed: 40260 Read, 26840 Write, 85785 Other = 152885 Total
Read 629.06Mb Written 419.38Mb Total transferred 1.0239Gb (3.4948Mb/sec)
223.67 Requests/sec executed
Test execution summary:
total time: 300.0004s
total number of events: 67100
total time taken by event execution: 254.4601
per-request statistics:
min: 0.0000s
avg: 0.0038s
