[noSQL] Replication, backup multi databases with CouchDB script

   Default, couchDB do not support replication for multi database. In a beautiful day, you want to move couchDB database to other server. What the solutions? Dump same a mysql dump? Not have. Copy all the file to new server, not good. You probably use replication function in couchDB, but if you have about 200 databases on old server now?

You can use curl command with this script, running for replication unlimited databases.

Step 1. Create file source.txt. Essentially, the file contains a lot of lines in the format:

database_name1
database_name2
database_name199

Step 2. Create perl file ckl.pl with contains:

#!/usr/bin/perl
# ckl.pl
#!/usr/local/bin/perl
# Created by Chung.Pham
# Date: 11/26/2013
$src_address = "couchdb.example.com";
$src_user   = "admin";
$src_passwd  = "password";
$dest_address  = "localhost:5984";
$dest_user  = "admin";  
$dest_passwd  = "password";
# Do not edit here
open (script, 'source.txt');
while (<script>) {
 $db_name = "$_";
 chomp $db_name;
 $string = "sudo curl -H \'Content-Type: application\/json\' -X POST http:\/\/" . $dest_user . ":" . $dest_passwd . "@" . $dest_address . "\/_replicate -d \'\{\"source\": \"http:\/\/" . $src_user . ":" . $src_passwd . "@" . $src_address . "\/" . $db_name . "\"" . "\, \"target\": \"" . $db_name . "\"\, \"create_target\": true}\'\n";
  print $string;
}
close (script);

Step 3. Chmod for ckl.pl file

chmod +r ckl.pl

Step 4. Running that perl file to generator a script

./ckl.pl > script.sh

Step 5. Copy file script.sh to server couchDB and run it:

chmod + r script.sh
./script.sh

Recommend:
You should try to run 1 line curl in script.sh file, if it show that bollow, meaning is working ok:

{"ok":true,"session_id":"9721d9991f47c84409cfb2951b466ef6","source_last_seq":2,"replication_id_version":3,"history":[{"session_id":"9721d9991f47c84409cfb2951b466ef6","start_time":"Wed, 27 Nov 2013 01:14:35 GMT","end_time":"Wed, 27 Nov 2013 01:14:38 GMT","start_last_seq":0,"end_last_seq":2,"recorded_seq":2,"missing_checked":2,"missing_found":0,"docs_read":0,"docs_written":0,"doc_write_failures":0}]}