Bug #50142 Backup - Limitation "Only 1 Backup or Restore session allowed" not documented
Submitted: 7 Jan 2010 16:14 Modified: 8 Jan 2010 15:51
Reporter: Sanjay Manwani Email Updates:
Status: Closed Impact on me:
Category:MySQL Server: Documentation Severity:S3 (Non-critical)
Version: OS:Any
Assigned to: Paul DuBois CPU Architecture:Any

[7 Jan 2010 16:14] Sanjay Manwani
Ingo noticed a restriction, which was not found in the
 MySQL Backup reference manual and not in the new list:

Only one BACKUP or RESTORE operation can run on one server at a time.
That is, only one BACKUP or one RESTORE can run at a time. Neither two
BACKUP, nor two RESTORE, nor one BACKUP plus one RESTORE can run at the
same time.

How to repeat:
This is a documentation bug.

Suggested fix:
Change in Documentation
[8 Jan 2010 15:51] Paul DuBois
Thank you for your bug report. This issue has been addressed in the documentation. The updated documentation will appear on our website shortly, and will be included in the next release of the relevant products.

Added to http://dev.mysql.com/doc/mysql-backup/en/mysql-backup-restrictions.html:

The server cannot execute multiple BACKUP DATABASE and RESTORE
statements concurrently. Each statement blocks the other as well as 
other instances of itself.