290 lines
13 KiB
Plaintext
290 lines
13 KiB
Plaintext
Disktest Version v1.4.x CHANGELOG
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CHANGES SINCE v1.3.x
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Major Changes:
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Added an option to specify the amount of time that IO can be stalled,
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before it is considered an error. The default is 120 sec and can be
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changed using the -t. An IO timeout is a warning message, unless -At is
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specified.
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Added additional option to -t to support random IO delays per thread. This
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function use to only support static delays. Review the -t option in the
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man page to understand the new operation.
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Added signal handling. So that SIGINT, SIGKILL, SIGHUP, SIGTERM, and
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SIGUSR1 are now handled. Sending SIGUSR1, will display heartbeat
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statistics since the last time SIGUSR1 was issued or the last heartbeat
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interval if -h is specified. Sending SIGUSR1, reset heartbeat counter
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statistics.
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More changes to the -m option. With the release of the last level of
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disktest, it was found the the extra mark options which were add, caused
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some undesired results, as in not being able to read back from a different
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host, due to the host name being automatically set. The -m option is now
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been cahnged to work just like the -P option. So that all mark options
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can be included, or only the desired subset.
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Added sync interval to -Is. The number of IOs can now be specified,
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before a sync is sent. If -Is is specified, then sync will occur on every
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write IO. If -Is100, then every 100th write IO, and sync will occur.
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Added -R option, which specifies a number of retries that should occur
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after a seek, or read/write failure. Also specifies how much delay should
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be added before a retry occurs. sync and data miscompares errors are not
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retrable.
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Added option to -A, -At, this will cause an IO timeout, specified by -t, to
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be an error and fail and IO test. By default, IO timeouts are warnings.
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Minor Changes:
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Fixed that use of -s or -S, where the LBA/Block specified is greater then
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the calculated volume size. This was an issue when initializing sparse
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file targets where a single write was issued at the end of the file.
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Fixed a bug for Windows were the volume size was returned in bytes when it
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should have been returned in blocks.
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Fixed a bug where during linear testing using cycles, the read time for the
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cycle duration was always being printed as one second.
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Disktest now uses stat(2) to check the filespec type, removed depricated
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way of checking file type, which did not always work as expected.
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Updated the sync on test end, to always sync when open for write. This is
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to make sure that even on block devices, that the kernel cache is sync'd to
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disk before moving to the next test. Previously this was only done when
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the filespec was a filesystem file only.
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Added patch from Mike Anderson for checking status on sync/close.
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Fixed cycle performance stat printing. Cycle performance was printing at
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the end if each cycle, even if -PC was not specified.
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Updated docs, to document the -PC option.
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Added check for early exit in IO threads when global run flag cleared.
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When the -Ac flag is specified, error messages, that would normally fail
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the test will be printed as warning messages, and the test will continue.
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At the end of the test, if it was able to complete, the test will be
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described as passed with warning. if the -Ac is not used, the the same
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test will be failed with errors.
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Fixed up some issues with the timer code, specifically so that timed runs
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are based on the number of seconds elapsed, not actual time, this was an
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issue during timed runs, and the system time was changed.
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Fixed an issue with the block range calcualation, when specified with the
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-S option. The last LBA calculation was wrong, of by transfer size - 1.
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Fixed an issue that was intruduced in 1.3, where percentage read/write
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always assumed error checking enabled.
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Fixed the -s and -S options so that they now allow for hex and oct input
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from the command line.
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Modified the fsync to not be called on character raw devices, this was
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causing a false failure on IO thread exit.
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Ross S. W. Walker found a significant performance drop in IO throughput.
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This was caused by calling sleep(0) by default on every IO. Modified
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the code so that if delay is zero, the sleep is not called.
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CHANGES SINCE v1.2.x
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Major Changes:
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Added synchronization at the block level between threads as the default.
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Also added an option to serialize IO and the IO operation level but it is
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not the default. Added to new options to -A, s and S, to manipulate these
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new synchronization and serialization features.
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Added the target, cycle start time, seed, and hostname info to the mark
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option. When the mark option is specified, the LBA number, the pass
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count, the start time in UTC, the seed value, the hostname, and the
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target is added to the front of each LBA data set, the remainder of the
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data set is then filed with the requested data pattern.
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On a data miscompare, disktest will now reread the lba that caused the data
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miscompare and present that data in the dump file and stdout.
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Add options to -A. If -Ag is specified, all threads to all tagets are
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killed, vs. threads to only the target that had the error. -Am, will write
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a marker, DISKTEST ERROR OCCURRED, to LBA 0 of the failing target device.
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To turn off the reread on data miscompare us the option -Ar. The orginal
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use of -A, continue on error, is now the option -Ac. -Aw will allow for
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WORM tesign when using -pR. -As and -AS are new IO sycronization options.
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A new option -M has been added. This will override the use of the cycle
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start time on the mark data and set it to the specified value up to 8 bytes.
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Added new seek pattern, -pr, random interleaved. The way this seek pattern
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functions is that a random LBA is selected, and then it is written to, if
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write is specified, then read from, if read is specified, before selecting
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a new random LBA. To get the original random, which supports the Duty
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cycle function and writes and read to random LBAs for each seek, use -pR.
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Added a delay time option, -t <delay>. This will allow a user to specify,
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in milliseconds, the amount of time for each thread to delay before
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performing each IO operation. The default is to not delay.
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Added a LBA alignement offset option, -o <offset>. This option allows a
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user to specify the LBA which IO will start from and be aligned to. For
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example if -o3 is specified for 1024 byte IOs, then the LBA alignment for
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IO will start at LBA 3 and be aligned at LBA 5, 7, 9, etc. Instend of
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aligned at LBA 0, 2, 4, 6, 8 etc. This is used to match the IO alignment
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to the storage device striping, or volume managment alignement in an OS.
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Minor Changes:
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The -d option use to reset the count at every 512 interval regardless of the
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requested dump size. This made it difficult to dump current data content
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from the filespec and compare it with misscompare data. The count is now
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consistent with the requested dump size.
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Modified the dump file to include the start arguments and the target.
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The timed test, -T, now works correctly with specifing cycles, -C.
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During cycle testing, the random data, -z, is now different for each cycle.
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Added the -F option to the -? usage.
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When a data miscompare occures, the data printed to stdout now shows the
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byte offset of the first byte that caused the miscompare, and 16 bytes of
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data at that offset.
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Added a compile directive for debug information, so that debug type code is
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now #ifdef'd. To us the -V option, the debug directive _DEBUG must be
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speicifed at compile time.
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Added the usecs an IO takes to complete in the debug information when using
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verbose level 5.
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The option -ma has been change to only having to specify -m
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When using the -F option to specify more then one target, there was a bug
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were the mutex was held for all targets during data compares, this has now
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been fixed so that each target holds its own set of mutexes.
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Changed stdout to not buffer its output.
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Modified the volume sizing function for aix, so that it could use the
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extended functions for getting the volumes size when DF_LGDSK is set
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as a flag in the devinfo struct.
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Modified the Makefile.aix to support compiling of a 64bit binary by
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default.
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Added additional checking when attempting to generate a random LBA target
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to lower the need to regenerate an LBA after alignment and transfer size
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are taken into account.
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The heartbeat option now shows statistics for the hearbeat interval, and
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not the aggregate of the cycle. Also added more discription to the
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statistical output to discribe the heartbeat, cycle, and total stats.
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Modified the block alignment macro so that non power of 2 transfer sizers
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will align correctly. Previously, when transfering non 2^n trnasfer sizes
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the nearest 2^n would be used.
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Add a patch to the code, provided to me by Oliver Paukstadt, were on s390,
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need to specify that length of the value used for "longest time" in the
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timer code.
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When an error occurs in io, the errno has been added to the output line.
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CHANGES SINCE v1.1.x
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Major Changes:
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A new option -F has been added. This allows the use of a file to discribe
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the targets that disktest will run against. This should work as if an
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individual command line was started for each of the targets specified in the
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file.
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Add an option, C, to the performance option -P. This allows the user to
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specify at the end of each cycle or test, to display the performance
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information for the cycle. In the case were there is only one cycle, then
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the total and cycle performance data will be identical.
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Minor Changes:
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Added day calculation to runtime statistics.
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When setting a finite pass count, the passes would continue one more cycle
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then specified.
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Added fsync on close for unix systems when doing file IO. The fsync will
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occur in between cycles and at the conclusion of a test. Also added a
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modification to -If, -Ifs, this will force an fsync on every write. The
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default is to only fsync at the end of a cycle or test.
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When using the the mark option, -m, disktest would some times report a
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false data miss compare. Also the only -m available now is -ma. There
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are cases that could cause false miss-compares when using variable block
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transfer size and the -mf or -ml options. For now these modifiers have
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been disabled.
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Disktest now detects the size of a file when doing filesystem IO tests. It
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previously defaulted to the internal default of 2000 LBAs.
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Updated the man page and usage text to describe option -z and option -Q.
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They have always been there, but never in the documentation.
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I had made use of lots of globals to share data between threads. Most of
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these have now been cleaned up.
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when using the -PPA option, the values were being rounded and not showing
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the calculated tenths.
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When running -C0, dsktest was showing 'Starting pass x of 0', removed the
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'of 0' part.
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Statistics are never being shown when using -C0 option. Now, stats will
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be shown for each cycle and the total for all cycles.
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The process ID that is shown as part of the running test is unique to the
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test running, not to each thread. This change was made to make it easier
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to track a single test out of a log file by searching for the id. It is
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also that same id used for the random seed and the dump file identifier.
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The -f option did not take into consideration the endian-ness of the arch.
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this would cause issues in the line value of the data pattern when using
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the option. This has been fixed.
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Added IFDEF for Power when using ioctl BLKGETSIZE where the size must be a
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unsigned long for the value to return correctly
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CHANGES SINCE v1.0.x
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Major Changes:
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Updated performance output based on command line. Gave one decimal in
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MB/s output.
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Rewrote -pL IO routine to show correct stats. Now shows pass count when
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using -C.
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Added dump function from command line. Created formatted dump output for
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Data miscomare and command line.
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Modified performance statistic printing to be more accurate with respect
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to throughput and IO/s. Added one decimal place of precision in MB/s
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calculation.
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Minor Changes:
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Code cleanup to remove the plethora if #ifdef for windows/unix functional
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differences.
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Updates to parsing routines for user input. Added multipliers for -S and
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-s command line arguments. Forced default seeks to default if performing
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a diskcache test.
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Can now leave off filespec the full path header as it will be added based
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on -I.
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