Manual:Backing up a wiki/pt-br

É importante que sejam feitos backups regulares dos dados de sua wiki. Esta página dará uma visão geral de um típico processo de backup para uma wiki da Mediawiki; você provavelmente vai desejar escrever seu próprio script de backup e cronograma mais adequados ao tamanho de sua wiki e a suas necessidades.

Visão geral
MediaWiki armazena dados importantes em dois lugares:
 * Database : Páginas e seus conteúdos, usuários e suas configurações, metadata, índices de pesquisa etc.
 * File system : Arquivos de configuração do software, interfaces customizáveis (skins), extensões, imagens (incluindo as deletadas) etc.

É recomendável mudar o status da wiki para "apenas leitura" antes de fazer o backup - veja $wgReadOnly. Esta ação garante que todas as partes de seu backup estará consistente (algumas de suas extensões instaladas podem escrever e modificar dados)

Transferência de arquivos
Você deverá escolher um método para transferir seus arquivos do servidor que os hospeda:


 * Dados não-privados podem ser publicados no archive.org e/ou no diretório do seu servidor web.
 * SCP (ou WinSCP), SFTP/FTP ou algum outro transfer protocol protocolo de transferência disponível.
 * A companhia de hospedagem pode prover uma interface gerenciadora de arquivos via navegador web, check com o provedor.

Base de dados
A "maior parte" dos dados de uma wiki estão armazenados no banco de dados, normalmente prático para se fazer backups.

Mysqldump por linha de comando
The most convenient way to create a dump file of the database you want to back up is to use the standard MySQL dump tool mysqldump from the command line. Be sure to get the parameters right or you may have difficulty restoring the database. Depending on database size, mysqldump could take a considerable amount of time.

Primeiro insira a seguinte linha no LocalSettings.php $wgReadOnly = 'Dumping Database, Access will be restored shortly'; isto pode ser removido assim que o despejo estiver concluída.

Exemplo do comando para executar no shell Linux/UNIX: mysqldump -h hostname -u userid -p --default-character-set=whatever dbname > backup.sql Substituting,  ,  , and   as appropriate. All four may be found in your LocalSettings.php (LSP) file. may be found under $wgDBserver; by default it is localhost. may be found under $wgDBuser,  may be found under $wgDBTableOptions, where it is listed after. If  is not specified mysqldump will likely use the default of utf8, or if using an older version of MySQL, latin1. While  may be found under $wgDBname. After running this line from the command line mysqldump will prompt for the server password (which may be found under Manual:$wgDBpassword in LSP).

See mysqldump for a full list of command line parameters.

The output from mysqldump can instead be piped to gzip, for a smaller output file, as follows mysqldump -h hostname -u userid -p dbname | gzip > backup.sql.gz

A similar mysqldump command can be used to produce XML output instead, by including the --xml parameter. mysqldump -h hostname -u userid -p --xml dbname > backup.xml and to compress the file with a pipe to gzip mysqldump -h hostname -u userid -p --xml dbname | gzip > backup.xml.gz

Remember to also backup the file system components of the wiki that might be required, e.g., images, logo, and extensions.

Executando mysqldump com Cron
Cron is the time-based job scheduler in Unix-like computer operating systems. Cron enables users to schedule jobs (commands or shell scripts) to run periodically at certain times or dates.

A sample command that you may run from a crontab may look like this:  nice -n 19 mysqldump -u $USER --password=$PASSWORD $DATABASE -c | nice -n 19 gzip -9 > ~/backup/wiki-$DATABASE-$(date '+%Y%m%d').sql.gz The  lowers the priority of the process.

Use valid values for,  , and. This will write a backup file with the weekday in the filename so you would have a rolling set of backups. If you want to save the files and extensions as well, you might want to use this one.

If you want to add this task in Cron through Cpanel then you must escape the character "%" /usr/bin/mysqldump -u $USER --password=$PASSWORD $DATABASE -c | /bin/gzip > ~/backup/wiki-$DATABASE-$(date '+\%Y\%m\%d').sql.gz

caso contrário, você obterá um erro: /bin/sh: -c: line 0: unexpected EOF while looking for matching `'' /bin/sh: -c: line 1: syntax error: unexpected end of file

Tabelas
Under close examination one finds that some of the tables dumped have various degrees of temporariness. So to save disk space (beyond just gziping), although those tables need to be present in a proper dump, their data does not. However, under certain circumstances the disadvantage of having to rebuild all this data may outweigh the saving in disk space (for example, on a large wiki where restoration speed is paramount).

See mailing list thread mysql5 binary schema about the topic.

Conversão de Latin-1 para UTF-8
See the relevant section of the upgrading page for information about this process. Also see the talk page for more information about working with character sets in general.

PostgreSQL
Você pode usar a ferramenta  para copiar o conteúdo de um banco de dados PostgreSQL. Por exemplo: pg_dump mywiki > mywikidump.sql vai criar uma cópia do banco  no arquivo mywikidump.sql.

Para restaurar o banco a partir do arquivo de backup: psql mywiki -f mywikidump.sql

É possível também fazer uma cópia de informações globais, como o banco de dados com os usuários:

pg_dumpall --globals > postgres_globals.sql

phpMyAdmin
Turn your wiki to read only by adding  to LocalSettings.php.

Open the browser to your phpadmin link, login, choose the wiki database. (Check LocalSettings.php if you're not sure). Select Export. Make sure all items under Export are highlighted, and make sure Structure is highlighted (it's important to maintain the table structure). Optionally check Add DROP TABLE to delete existing references when importing. Make sure Data is checked. Select zipped. Then click on GO and save the backup file.

Remove  from LocalSettings.php

Remember to also backup the file system components of the wiki that might be required, eg. images, logo, and extensions.

Links externos

 * For a tutorial, see Siteground: MySQL Export: How to backup a MySQL database using phpMyAdmin''
 * Backing up the Database

HeidiSQL
HeidiSQL is similar to phpMyAdmin, but without any restrictions of phpMyAdmin's free version.

Sistema de arquivos
MediaWiki stores other components of the wiki in the file system where this is more appropriate than insertion into the database, for example, site configuration files (,  (finally removed in 1.23)), image files (including deleted images, thumbnails and rendered math and SVG images, if applicable), skin customisations, extension files, etc.

The best method to back these up is to place them into an archive file, such as a  file, which can then be compressed if desired. On Windows, applications such as WinZip or 7-zip can be used if preferred.

For Linux variants, assuming the wiki is stored in /srv/www/htdocs/wiki tar zcvhf wikidata.tgz /srv/www/htdocs/wiki It should be possible to backup the entire "wiki" folder in "htdocs" if using XAMPP.

Backup do conteúdo da wiki (XML dump)
It is also a good idea to create an XML dump in addition to the database dump. XML dumps contain the content of the wiki (wiki pages with all their revisions), without the site-related data (they do not contain user accounts, image metadata, logs, etc).

XML dumps are less likely to cause problems with character encoding, as a means of transfering large amounts of content quickly, and are easily be used by third party tools, which makes XML dumps a good fallback should your main database dump become unusable.

To create an XML dump, use the command-line tool, located in the   directory of your MediaWiki installation. See Manual:dumpBackup.php for more details.

You can also create an XML dump for a specific set of pages online, using Special:Export, although attempting to dump large quantities of pages through this interface will usually time out.

To import an XML dump into a wiki, use the command-line tool. For a small set of pages, you can also use the Special:Import page via your browser (by default, this is restricted to the sysop group). As an alternative to  and , you can use MWDumper, which is faster, but requires a Java runtime environment.

See Manual:Importing XML dumps for more information.

Sem acesso shell ao servidor
If you have no shell access, then use the WikiTeam Python script dumpgenerator.py from a DOS, Unix or Linux command-line. To run the script see the WikiTeam tutorial.

See also Data dumps.

Scripts

 * Unofficial backup script by User:Duesentrieb.


 * Unofficial backup script by Flominator; creates a backup of all files and the database, with optional backup rotation.


 * User:Darizotas/MediaWiki Backup Script for Windows - a script for backing up a Windows MediaWiki install. Note: Has no restore feature.


 * Unofficial web-based backup script, mw_tools, by Wanglong (allwiki.com); you can use it to back up your database, or use the backup files to recover the database, the operation is very easy.


 * WikiTeam tools - if you do not have server access (e.g. your wiki is in a free wikifarm), you can generate an XML dump and an image dump using WikiTeam tools (see some saved wikis)


 * Fullsitebackup


 * Another backup script that: dumps DB, files, and XML; puts the site into read-only mode; timestamps backups; and reads the charset from LocalSettings. Script does not need to be modified for each site to be backed up. Does not (yet) rotate old backups. Usage:


 * Script to make periodical backups mw_backup. This script will make daily, weekly and monthly backups of your database and images directory when run as a daily cron job.

Ver também

 * Manual:Restaurando a wiki do backup
 * Manual:Movendo a wiki
 * Manual:Atualização
 * Manual:Restoring wiki code from cached HTML (if you don't have a successful backup)