注：此为记录我当时操作的全部过程
d:\documents and settings\administrator>c:
c:\>cd MySQL
c:\mysql>cd data
c:\mysql\data>cd hw_enterprice
c:\mysql\data\hw_enterprice>myisamchk function_products.frm
'myisamchk' 不是内部或外部命令，也不是可运行的程序或批处理文件。
c:\mysql\data\hw_enterprice>cd\
c:\>cd mysql
c:\mysql>cd bin
注：查看myisamchk的帮助信息
c:\mysql\bin>myisamchk
myisamchk ver 2.6 for win95/win98 at i32
by monty, for your professional use
this software comes with no warranty: see the public for details. description, check and repair of isam tables.
used without options all tables on the command will be checked for errors
usage: myisamchk [options] tables[.myi] global options:
-#, --debug=... output debug log. often this is 'd:t:o,filename'
-?, --help display this help and exit.
-o, --set-variable var=option
change the value of a variable. please note that
this option is deprecated; you can set variables
directly with '--variable-name=value'.
-t, --tmpdir=path path for temporary files
-s, --silent only print errors. one can use two -s to make
myisamchk very silent
-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 myisamchk):
-c, --check check table for errors
-e, --extend-check check the table very throughly. only use this in
extreme cases as myisamchk 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
-u --update-state mark tables as crashed if you find any errors
-t, --read-only don't mark table as checked repair options (when using '-r' or '-o')
-b, --backup make a backup of the .myd 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 myisam to update only some specific keys. # is a
bit mask of which keys to use. this can be used to
get faster inserts!
-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.
this is alpha code. use at your own risk!
-o, --safe-recover uses old recovery method; slower than '-r' but can
handle a couple of cases where '-r' reports that it
can't fix the data file.
--character-sets-dir=...
directory where character sets are
--set-character-set=name
change the character set used by the index
-q, --quick faster repair by not modifying the data file.
one can give a second '-q' to force myisamchk to
modify the original datafile in case of duplicate keys
-u, --unpack unpack file packed with myisampack. other actions:
-a, --analyze analyze distribution of keys. will make some joins in
MySQL faster. you can check the calculated distribution
by using '--description --verbose table_name'.
-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
c:\mysql\bin>myisamchk c:\mysql\data\hw_enterprice\function_products.frm
myisamchk: error: 'c:\mysql\data\hw_enterprice\function_products.frm' is not a m
yisam-table c:\mysql\bin>myisamchk c:\mysql\data\hw_enterprice\function_products.myi
checking myisam file: c:\mysql\data\hw_enterprice\function_products.myi
data records: 85207 deleted blocks: 39
myisamchk: warning: table is marked as crashed
myisamchk: warning: 1 clients is using or hasn't closed the table properly
- check file-size
- check key delete-chain
- check record delete-chain
myisamchk: error: record delete-link-chain corrupted
- check index reference
- check data record references index: 1
- check data record references index: 2
- check data record references index: 3
- check record links
myisamchk: error: wrong bytesec: 0-195-171 at linkstart: 841908
myisam-table 'c:\MySQL\data\hw_enterprice\function_products.myi' is corrupted
fix it using switch "-r" or "-o"
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