NAME

       raidz_test - raidz implementation verification and benchmarking tool

SYNOPSIS

       raidz_test <options>

DESCRIPTION

       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.

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.

SEE ALSO

       ztest (1)

AUTHORS

       vdev_raidz, created for ZFS on Linux by Gvozden Nešković <neskovic@gmail.com>