[Couchdb Wiki] Update of "FilesystemBackups" by JasonHuggins

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The following page has been changed by JasonHuggins:
http://wiki.apache.org/couchdb/FilesystemBackups

The comment on the change is:
>>From CouchDB users mailing list. August, 2008. Subject: "Backup of couchdb"

New page:
You need to backup three types of variable data files:

   * Database files
      
   * Configuration files
   
   * Log files

[http://mail-archives.apache.org/mod_mbox/incubator-couchdb-user/200808.mbox/%3c32800028-9286-47C8-82A5-1ECC25667FDA@apache.org%3e Couch-users discussion from Damien Katz - August 2008]:

{{{
you can copy a live database file from the OS at anytime without problem. Doesn't matter if its being updated, or even if its being compacted, the CouchDB never-overwrite storage format ensures it should just work without issue.
}}}

For all platforms, locate your database, configuration, and log files and perform a filesystem copy. Be careful to preserve file permissions, too. Archive these files to wherever you want-- ideally on a different machine in a different physical location -- with appropriate security limiting access.   

For example, here are the directories to backup for a CouchDB install on Ubuntu:
Configuration: /usr/local/etc/couchdb/
Database files: /usr/local/var/lib/couchdb/    
Logs: /usr/local/var/log/couchdb/