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Copyright (c) 2016 Gvozden Nešković. All rights reserved.

raidz_test - raidz implementation verification and benchmarking tool

"raidz_test <options>"

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).

"-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 -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.

"-e(xpansion)"

Use expanded raidz map allocation function.

"-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.

"ztest (1)" vdev_raidz, created for OpenZFS by Gvozden Nešković <neskovic@gmail.com>