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244 lines
7.4 KiB
Groff
244 lines
7.4 KiB
Groff
.TH ARIA_CHK "1" "May 2014" "aria_chk Ver 1.2" "User Commands"
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.SH NAME
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aria_chk \- Aria table\-maintenance utility
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.SH SYNOPSIS
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.B aria_chk
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[\fIOPTIONS\fR] \fItables\fR[\fI.MAI\fR]
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.SH DESCRIPTION
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Describe, check and repair of Aria tables.
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Used without options all tables on the command will be checked for errors
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.SS "Global options"
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.TP
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\fB\-#\fR, \fB\-\-debug=\fR...
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Output debug log. Often this is 'd:t:o,filename'.
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.TP
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\fB\-H\fR, \fB\-\-HELP\fR
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Print all argument options sorted alphabetically.
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.TP
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\fB\-?\fR, \fB\-\-help\fR
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Print all options by groups
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.TP
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\fB\-\-datadir\fR=\fIpath\fR
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Path for control file (and logs if \fB\-\-logdir\fR not used)
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.TP
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\fB\-\-logdir\fR=\fIpath\fR
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Path for log files
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.TP
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\fB\-\-ignore\-control\-file\fR
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Don't open the control file. Only use this if you
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are sure the tables are not in use by another
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program!
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.TP
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\fB\-\-require\-control\-file\fR
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Abort if we can't find/read the maria_log_control
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file
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.TP
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\fB\-s\fR, \fB\-\-silent\fR
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Only print errors. One can use two \fB\-s\fR to make
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maria_chk very silent.
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.TP
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\fB\-t\fR, \fB\-\-tmpdir\fR=\fIpath\fR
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Path for temporary files. Multiple paths can be
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specified, separated by colon (:), they will be used
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in a round\-robin fashion.
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.TP
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\fB\-v\fR, \fB\-\-verbose\fR
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Print more information. This can be used with
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\fB\-\-description\fR and \fB\-\-check\fR. Use many \fB\-v\fR for more verbosity.
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.TP
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\fB\-V\fR, \fB\-\-version\fR
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Print version and exit.
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.TP
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\fB\-w\fR, \fB\-\-wait\fR
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Wait if table is locked.
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.SS "Check options (check is the default action for aria_chk)"
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.TP
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\fB\-c\fR, \fB\-\-check\fR
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Check table for errors.
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.TP
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\fB\-e\fR, \fB\-\-extend\-check\fR
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Check the table VERY thoroughly. Only use this in
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extreme cases as aria_chk should normally be able to
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find out if the table is ok even without this switch.
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.TP
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\fB\-F\fR, \fB\-\-fast\fR
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Check only tables that haven't been closed properly.
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.TP
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\fB\-C\fR, \fB\-\-check\-only\-changed\fR
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Check only tables that have changed since last check.
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.TP
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\fB\-f\fR, \fB\-\-force\fR
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Restart with '\-r' if there are any errors in the table.
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States will be updated as with '\-\-update\-state'.
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.TP
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\fB\-i\fR, \fB\-\-information\fR
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Print statistics information about table that is checked.
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.TP
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\fB\-m\fR, \fB\-\-medium\-check\fR
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Faster than extend\-check, but only finds 99.99% of
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all errors. Should be good enough for most cases.
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.TP
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\fB\-T\fR, \fB\-\-read\-only\fR
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Don't mark table as checked.
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.TP
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\fB\-U\fR, \fB\-\-update\-state\fR
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Mark tables as crashed if any errors were found and
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clean if check didn't find any errors but table was
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marked as 'not clean' before. This allows one to get
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rid of warnings like 'table not properly closed'. If
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table was updated, update also the timestamp for when
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the check was made. This option is on by default!
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Use \fB\-\-skip\-update\-state\fR to disable.
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.HP
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\fB\-\-warning\-for\-wrong\-transaction\-id\fR
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.IP
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Give a warning if we find a transaction id in the table that is bigger
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than what exists in the control file. Use \fB\-\-skip\-\fR... to disable warning
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.SS "Recover (repair)/ options (When using '--recover' or '--safe-recover')"
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.TP
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\fB\-B\fR, \fB\-\-backup\fR
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Make a backup of the .MAD file as 'filename\-time.BAK'.
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.TP
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\fB\-\-correct\-checksum\fR
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Correct checksum information for table.
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.TP
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\fB\-D\fR, \fB\-\-data\-file\-length=\fR#
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Max length of data file (when recreating data
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file when it's full).
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.TP
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\fB\-e\fR, \fB\-\-extend\-check\fR
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Try to recover every possible row from the data file
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Normally this will also find a lot of garbage rows;
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Don't use this option if you are not totally desperate.
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.TP
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\fB\-f\fR, \fB\-\-force\fR
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Overwrite old temporary files.
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.TP
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\fB\-k\fR, \fB\-\-keys\-used=\fR#
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Tell Aria to update only some specific keys. # is a
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bit mask of which keys to use. This can be used to
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get faster inserts.
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.TP
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\fB\-\-max\-record\-length=\fR#
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Skip rows bigger than this if aria_chk can't allocate
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memory to hold it.
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.TP
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\fB\-r\fR, \fB\-\-recover\fR
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Can fix almost anything except unique keys that aren't
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unique.
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.TP
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\fB\-n\fR, \fB\-\-sort\-recover\fR
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Forces recovering with sorting even if the temporary
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file would be very big.
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.TP
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\fB\-p\fR, \fB\-\-parallel\-recover\fR
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Uses the same technique as '\-r' and '\-n', but creates
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all the keys in parallel, in different threads.
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.TP
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\fB\-o\fR, \fB\-\-safe\-recover\fR
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Uses old recovery method; Slower than '\-r' but can
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handle a couple of cases where '\-r' reports that it
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can't fix the data file.
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.TP
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\fB\-\-transaction\-log\fR
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Log repair command to transaction log. This is needed
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if one wants to use the aria_read_log to repeat the
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repair
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.TP
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\fB\-\-character\-sets\-dir=\fR...
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Directory where character sets are.
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.TP
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\fB\-\-set\-collation\fR=\fIname\fR
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Change the collation used by the index.
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.TP
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\fB\-q\fR, \fB\-\-quick\fR
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Faster repair by not modifying the data file.
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One can give a second '\-q' to force aria_chk to
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modify the original datafile in case of duplicate keys.
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NOTE: Tables where the data file is corrupted can't be
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fixed with this option.
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.TP
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\fB\-u\fR, \fB\-\-unpack\fR
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Unpack file packed with ariapack.
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.SS "Other actions"
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.TP
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\fB\-a\fR, \fB\-\-analyze\fR
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Analyze distribution of keys. Will make some joins in
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MariaDB faster. You can check the calculated distribution
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by using '\-\-description \fB\-\-verbose\fR table_name'.
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.TP
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\fB\-\-stats_method\fR=\fIname\fR
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Specifies how index statistics collection code should
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treat NULLs. Possible values of name are "nulls_unequal"
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(default for 4.1/5.0), "nulls_equal" (emulate 4.0), and
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"nulls_ignored".
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.TP
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\fB\-d\fR, \fB\-\-description\fR
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Prints some information about table.
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.TP
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\fB\-A\fR, \fB\-\-set\-auto\-increment\fR[=\fIvalue\fR]
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Force auto_increment to start at this or higher value
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If no value is given, then sets the next auto_increment
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value to the highest used value for the auto key + 1.
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.TP
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\fB\-S\fR, \fB\-\-sort\-index\fR
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Sort index blocks. This speeds up 'read\-next' in
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applications.
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.TP
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\fB\-R\fR, \fB\-\-sort\-records=\fR#
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Sort records according to an index. This makes your
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data much more localized and may speed up things
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(It may be VERY slow to do a sort the first time!).
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.TP
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\fB\-b\fR, \fB\-\-block\-search=\fR#
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Find a record, a block at given offset belongs to.
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.TP
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\fB\-z\fR, \fB\-\-zerofill\fR
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Fill empty space in data and index files with zeroes.
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This makes the data file movable between different
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servers.
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.TP
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\fB\-\-zerofill\-keep\-lsn\fR
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Like \fB\-\-zerofill\fR but does not zero out LSN of
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data/index pages.
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.PP
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.SS "Variables"
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.TP
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\fB\-\-page_buffer_size=\fR#
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Size of page buffer. Used by \fB\-\-safe\-repair\fR
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.TP
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\fB\-\-read_buffer_size=\fR#
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Read buffer size for sequential reads during scanning
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.TP
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\fB\-\-sort_buffer_size=\fR#
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Size of sort buffer. Used by \fB\-\-recover\fR
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.TP
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\fB\-\-sort_key_blocks=\fR#
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Internal buffer for sorting keys; Don't touch.
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.TP
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\fB\-\-write_buffer_size=\fR#
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Write buffer size for sequential writes during repair
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.PP
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Default options are read from the following files in the given order:
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\fB/etc/my.cnf /etc/mysql/my.cnf ~/.my.cnf\fR
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.PP
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The following groups are read: \fBaria_chk\fR
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.PP
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The following options may be given as the first argument:
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.TP
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\fB\-\-print\-defaults\fR
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Print the program argument list and exit.
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.TP
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\fB\-\-no\-defaults\fR
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Don't read default options from any option file.
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.TP
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\fB\-\-defaults\-file=\fR#
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Only read default options from the given file #.
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.TP
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\fB\-\-defaults\-extra\-file=\fR#
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Read this file after the global files are read.
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.PP
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.SH "SEE ALSO"
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\fBmyisamchk(1)\fR
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.PP
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For more information, please refer to the MariaDB Knowledge Base, available online at https://mariadb.com/kb/
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