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ARIA_CHK(1)			 User Commands			   ARIA_CHK(1)

       aria_chk	- Aria table-maintenance utility

       aria_chk	[OPTIONS] tables[.MAI]

       Describe,  check	 and  repair of	Aria tables.  Used without options all
       tables on the command will be checked for errors

   Global options
       -#, --debug=...
	      Output debug log.	Often this is 'd:t:o,filename'.

       -H, --HELP
	      Print all	argument options sorted	alphabetically.

       -?, --help
	      Print all	options	by groups

	      Path for control file (and logs if --logdir not used)

	      Path for log files

	      Don't open the control file. Only	use this if you	are  sure  the
	      tables are not in	use by another program!

	      Abort if we can't	find/read the maria_log_control	file

       -s, --silent
	      Only  print  errors.   One can use two -s	to make	maria_chk very

       -t, --tmpdir=path
	      Path for temporary files.	Multiple paths can be specified, sepa-
	      rated by colon (:), they will be used in a round-robin fashion.

       -v, --verbose
	      Print  more information. This can	be used	with --description and
	      --check. Use many	-v for more verbosity.

       -V, --version
	      Print version and	exit.

       -w, --wait
	      Wait if table is locked.

   Check options (check	is the default action for aria_chk)
       -c, --check
	      Check table for errors.

       -e, --extend-check
	      Check the	table VERY thoroughly.	Only use this in extreme cases
	      as  aria_chk should normally be able to find out if the table is
	      ok even without this switch.

       -F, --fast
	      Check only tables	that haven't been closed properly.

       -C, --check-only-changed
	      Check only tables	that have changed since	last check.

       -f, --force
	      Restart with '-r'	if there are any errors	in the table.	States
	      will be updated as with '--update-state'.

       -i, --information
	      Print statistics information about table that is checked.

       -m, --medium-check
	      Faster  than  extend-check, but only finds 99.99%	of all errors.
	      Should be	good enough for	most cases.

       -T, --read-only
	      Don't mark table as checked.

       -U, --update-state
	      Mark tables as crashed if	any errors were	 found	and  clean  if
	      check didn't find	any errors but table was marked	as 'not	clean'
	      before. This allows one to get rid of warnings like  'table  not
	      properly	closed'.  If  table was	updated, update	also the time-
	      stamp for	when the check was made. This option is	on by default!
	      Use --skip-update-state to disable.


	      Give  a warning if we find a transaction id in the table that is
	      bigger than what exists in the control file. Use	--skip-...  to
	      disable warning

   Recover (repair)/ options (When using '--recover' or	'--safe-recover')
       -B, --backup
	      Make a backup of the .MAD	file as	'filename-time.BAK'.

	      Correct checksum information for table.

       -D, --data-file-length=#
	      Max  length  of  data  file (when	recreating data	file when it's

       -e, --extend-check
	      Try to recover every possible row	from the  data	file  Normally
	      this will	also find a lot	of garbage rows; Don't use this	option
	      if you are not totally desperate.

       -f, --force
	      Overwrite	old temporary files.

       -k, --keys-used=#
	      Tell Aria	to update only some specific keys. # is	a bit mask  of
	      which keys to use. This can be used to get faster	inserts.

	      Skip  rows bigger	than this if aria_chk can't allocate memory to
	      hold it.

       -r, --recover
	      Can fix almost anything except unique keys that aren't unique.

       -n, --sort-recover
	      Forces recovering	with sorting even if the temporary file	 would
	      be very big.

       -p, --parallel-recover
	      Uses  the	 same  technique as '-r' and '-n', but creates all the
	      keys in parallel,	in different threads.

       -o, --safe-recover
	      Uses old recovery	method;	Slower than '-r' but can handle	a cou-
	      ple of cases where '-r' reports that it can't fix	the data file.

	      Log  repair  command  to	transaction log. This is needed	if one
	      wants to use the aria_read_log to	repeat the repair

	      Directory	where character	sets are.

	      Change the collation used	by the index.

       -q, --quick
	      Faster repair by not modifying the data file.  One  can  give  a
	      second '-q' to force aria_chk to modify the original datafile in
	      case of duplicate	keys.  NOTE: Tables where  the	data  file  is
	      currupted	can't be fixed with this option.

       -u, --unpack
	      Unpack file packed with ariapack.

   Other actions
       -a, --analyze
	      Analyze  distribution  of	 keys. Will make some joins in MariaDB
	      faster.  You can check  the  calculated  distribution  by	 using
	      '--description --verbose table_name'.

	      Specifies	 how  index  statistics	 collection  code should treat
	      NULLs. Possible values of	name are "nulls_unequal" (default  for
	      4.1/5.0),	"nulls_equal" (emulate 4.0), and "nulls_ignored".

       -d, --description
	      Prints some information about table.

       -A, --set-auto-increment[=value]
	      Force  auto_increment  to	 start	at  this or higher value If no
	      value is given, then sets	the next auto_increment	value  to  the
	      highest used value for the auto key + 1.

       -S, --sort-index
	      Sort index blocks.  This speeds up 'read-next' in	applications.

       -R, --sort-records=#
	      Sort  records  according to an index.  This makes	your data much
	      more localized and may speed up things (It may be	VERY  slow  to
	      do a sort	the first time!).

       -b,  --block-search=#
	      Find a record, a block at	given offset belongs to.

       -z,  --zerofill
	      Fill  empty  space  in  data  and	index files with zeroes.  This
	      makes the	data file movable between different servers.

	      Like --zerofill but does not zero	out LSN	of data/index pages.

	      Size of page buffer. Used	by --safe-repair

	      Read buffer size for sequential reads during scanning

	      Size of sort buffer. Used	by --recover

	      Internal buffer for sorting keys;	Don't touch.

	      Write buffer size	for sequential writes during repair

       Default options are read	from the following files in the	 given	order:
       /etc/my.cnf /etc/mysql/my.cnf ~/.my.cnf

       The following groups are	read: aria_chk

       The following options may be given as the first argument:

	      Print the	program	argument list and exit.

	      Don't read default options from any option file.

	      Only read	default	options	from the given file #.

	      Read this	file after the global files are	read.


       For  more  information,	please	refer  to  the MariaDB Knowledge Base,
       available online	at

aria_chk Ver 1.2		   May 2014			   ARIA_CHK(1)


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