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.Dd May 26, 2021
.Dt RAIDZ_TEST 1
.Os OpenZFS
.
.Sh NAME
.Nm raidz_test
.Nd raidz implementation verification and benchmarking tool
.Sh SYNOPSIS
.Nm
.Op Fl StBevTD
.Op Fl a Ar ashift
.Op Fl o Ar zio_off_shift
.Op Fl d Ar raidz_data_disks
.Op Fl s Ar zio_size_shift
.Op Fl r Ar reflow_offset
.
.Sh 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
.Fl B
option.
.
.Sh OPTION
.Bl -tag -width "-B(enchmark)"
.It Fl h
Print a help summary.
.It Fl a Ar ashift Pq default: Sy 9
Ashift value.
.It Fl o Ar zio_off_shift Pq default: Sy 0
ZIO offset for each raidz block.
The offset's value is
.Em 2^zio_off_shift .
.It Fl d Ar raidz_data_disks Pq default: Sy 8
Number of raidz data disks to use.
Additional disks will be used for parity.
.It Fl s Ar zio_size_shift Pq default: Sy 19
Size of data for raidz block.
The real size is
.Em 2^zio_size_shift .
.It Fl r Ar reflow_offset Pq default: Sy uint max
Set raidz expansion offset.
The expanded raidz map allocation function will
produce different map configurations depending on this value.
.It Fl S Ns Pq weep
Sweep parameter space while verifying the raidz implementations.
This option
will exhaust all most of valid values for the
.Fl aods
options.
Runtime using this option will be long.
.It Fl t Ns Pq imeout
Wall time for sweep test in seconds.
The actual runtime could be longer.
.It Fl B Ns Pq enchmark
All implementations are benchmarked using increasing per disk data size.
Results are given as throughput per disk, measured in MiB/s.
.It Fl e Ns Pq xpansion
Use expanded raidz map allocation function.
.It Fl v Ns Pq erbose
Increase verbosity.
.It Fl T Ns Pq est the test
Debugging option: fail all tests.
This is to check if tests would properly verify bit-exactness.
.It Fl D Ns Pq ebug
Debugging option: attach
.Xr gdb 1
when
.Sy SIGSEGV
or
.Sy SIGABRT
are received.
.El
.
.Sh "SEE ALSO"
.Xr ztest 1