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 RAIDZ 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.

SEE ALSO

       ztest(1)

OpenZFS                                           May 26, 2021                                     RAIDZ_TEST(1)