raidz_test - raidz implementation verification and
benchmarking tool
This manual page documents briefly the raidz_test
command.
Purpose of this tool is to run all supported raidz implementation
and verify results of all methods. Tool also contains a parameter sweep
option where all parameters affecting RAIDZ block are verified (like ashift
size, data offset, data size, etc...). The tool also supports a benchmarking
mode using -B option.
-h
- Print a help summary.
-a ashift (default: 9)
- Ashift value.
-o zio_off_shift (default: 0)
- Zio offset for raidz block. Offset value is 1 <<
(zio_off_shift)
-d raidz_data_disks (default: 8)
- Number of raidz data disks to use. Additional disks for parity will be
used during testing.
-s zio_size_shift (default: 19)
- Size of data for raidz block. Size is 1 << (zio_size_shift).
-S(weep)
- Sweep parameter space while verifying the raidz implementations. This
option will exhaust all most of valid values for -a -o -d -s 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)
- This options starts the benchmark mode. All implementations are
benchmarked using increasing per disk data size. Results are given as
throughput per disk, measured in MiB/s.
-v(erbose)
- Increase verbosity.
-T(est the test)
- Debugging option. When this option is specified tool is supposed to fail
all tests. This is to check if tests would properly verify
bit-exactness.
-D(ebug)
- Debugging option. Specify to attach gdb when SIGSEGV or SIGABRT are
received.
vdev_raidz, created for OpenZFS by Gvozden Nešković
<neskovic@gmail.com>