aria_chk(1)



ARIA_CHK(1)                      User Commands                     ARIA_CHK(1)

NAME
       aria_chk - Aria table-maintenance utility

SYNOPSIS
       aria_chk [OPTIONS] tables[.MAI]

DESCRIPTION
       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

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

       --logdir=path
              Path for log files

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

       --require-control-file
              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
              silent.

       -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 throughly.  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.

       --warning-for-wrong-transaction-id

              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
              Correct checksum information for table.

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

       -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.

       --max-record-length=#
              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.

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

       --character-sets-dir=...
              Directory where character sets are.

       --set-collation=name
              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'.

       --stats_method=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.

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

   Variables
       --page_buffer_size=#
              Size of page buffer. Used by --safe-repair

       --read_buffer_size=#
              Read buffer size for sequential reads during scanning

       --sort_buffer_size=#
              Size of sort buffer. Used by --recover

       --sort_key_blocks=#
              Internal buffer for sorting keys; Don't touch.

       --write_buffer_size=#
              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-defaults
              Print the program argument list and exit.

       --no-defaults
              Don't read default options from any option file.

       --defaults-file=#
              Only read default options from the given file #.

       --defaults-extra-file=#
              Read this file after the global files are read.

SEE ALSO
       myisamchk(1)

       For  more  information,  please  refer  to  the MariaDB Knowledge Base,
       available online at https://mariadb.com/kb/

aria_chk Ver 1.2                   May 2014                        ARIA_CHK(1)

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