Plugin:Dbx mdbx/pl: Difference between revisions

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Plugin:Dbx mdbx/pl
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mdbx_chk.exe -i -w -v -t -2 "path\to\corrupted.dat"
mdbx_chk.exe -i -w -v -t -2 "path\to\corrupted.dat"
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This command will select the second to last meta page (since the last one is probably corrupted).
Each meta page contains the necessary information (number transactions, geometry, etc.) as well as a pointer (usually) to
own MVCC snapshot that seems to float in many pages along with the rest of the MVCC snapshots. Each such snapshot is generated when the writing transaction is committed.


== Database check ==
== Database check ==

Revision as of 16:10, 9 October 2020

Other languages:
Miranda NG MDBX database driver

Nazwa pliku Dbx_mdbx.dll
Autor Miranda NG team
Pobierz
Wersja stabilna: 32-bit, 64-bit
Wersja rozwojowa: 32-bit, 64-bit

Uwaga
This database driver might suffer problems because of PC instability or disk damages. Thus that's vitally important to make backups once a day to minimize the chance of data loss.

Zapewnia obsługę bazy danych Mirandy: ustawień globalnych, kontaktów, historii, ustawień dla każdego kontaktu z osobna.

Wtyczka stworzona w oparciu o bibliotekę libmdbx.

Database repair

Ważne
Make a backup copy of the damaged database before restoring!

mdbx_chk.exe is located in the Miranda root folder.

mdbx_chk.exe -i -w -v -t -2 "path\to\corrupted.dat"

This command will select the second to last meta page (since the last one is probably corrupted).

Each meta page contains the necessary information (number transactions, geometry, etc.) as well as a pointer (usually) to own MVCC snapshot that seems to float in many pages along with the rest of the MVCC snapshots. Each such snapshot is generated when the writing transaction is committed.

Database check

mdbx_chk.exe is located in the Miranda root folder.

mdbx_chk.exe -i -v -n -w "path\to\database.dat"
Informacja
"problems: wrong order of entries" messages should not be considered as errors.

If the above does not help

mdbx_dump.exe and mdbx_load.exe are located in the Miranda root folder.

mdbx_dump.exe -n -a -f "%TEMP%\corrupted.tmp" "path\to\corrupted.dat"
mdbx_load.exe -n -a -f "%TEMP%\corrupted.tmp" "path\to\repaired.dat"

This extracts as much data as possible from the corrupted.dat to the temporary file and builds repaired.dat.