NAME
raidz_test – raidz implementation verification and benchmarking tool
SYNOPSIS
raidz_test [-StBevTD] [-a ashift] [-o zio_off_shift] [-d raidz_data_disks] [-s zio_size_shift] [-r reflow_offset]
DESCRIPTION
The purpose of this tool is to run all supported raidz implementation and verify the results of all methods. It also contains a parameter sweep option where all parameters affecting a RAID-Z block are verified (like ashift size, data offset, data size, etc.). The tool also supports a benchmarking mode using the -B option.
OPTION
- -h
-
Print a help summary.
- -a ashift (default: 9)
-
Ashift value.
- -o zio_off_shift (default: 0)
-
ZIO offset for each raidz block. The offset's value is 2^zio_off_shift.
- -d raidz_data_disks (default: 8)
-
Number of raidz data disks to use. Additional disks will be used for parity.
- -s zio_size_shift (default: 19)
-
Size of data for raidz block. The real size is 2^zio_size_shift.
- -r reflow_offset (default: uint max)
-
Set raidz expansion offset. The expanded raidz map allocation function will produce different map configurations depending on this value.
- -S(weep)
-
Sweep parameter space while verifying the raidz implementations. This option will exhaust all most of valid values for the -aods options. Runtime using this option will be long.
- -t(imeout)
-
Wall time for sweep test in seconds. The actual runtime could be longer.
- -B(enchmark)
-
All implementations are benchmarked using increasing per disk data size. Results are given as throughput per disk, measured in MiB/s.
- -e(xpansion)
-
Use expanded raidz map allocation function.
- -v(erbose)
-
Increase verbosity.
- -T(est the test)
-
Debugging option: fail all tests. This is to check if tests would properly verify bit-exactness.
- -D(ebug)
-
Debugging option: attach gdb(1) when SIGSEGV or SIGABRT are received.