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From "Suresh Thalamati (JIRA)" <derby-...@db.apache.org>
Subject [jira] Updated: (DERBY-239) Need a online backup feature that does not block update operations when online backup is in progress.
Date Mon, 31 Oct 2005 18:56:00 GMT
     [ http://issues.apache.org/jira/browse/DERBY-239?page=all ]

Suresh Thalamati updated DERBY-239:
-----------------------------------

    Attachment: onlinebackup_2.diff

Fix  to the problem found by Øystein  while reviewing the previous online backup patch(online_backup1.diff).
Backup of a container code was doing a seek  incorrectly on the file container instead of
the backup file. 

Tests: All tests passed on jdk142  Windows XP. 

It would be great if some one can commit this patch. 


Thanks
-suresht
  

> Need a online backup feature  that does not block update operations   when online backup
is in progress.
> --------------------------------------------------------------------------------------------------------
>
>          Key: DERBY-239
>          URL: http://issues.apache.org/jira/browse/DERBY-239
>      Project: Derby
>         Type: New Feature
>   Components: Store
>     Versions: 10.1.1.0
>     Reporter: Suresh Thalamati
>     Assignee: Suresh Thalamati
>  Attachments: onlinebackup.html, onlinebackup_1.diff, onlinebackup_2.diff
>
> Currently Derby allows users to perfoms  online backups using SYSCS_UTIL.SYSCS_BACKUP_DATABASE()
procedure,  but while the backup is in progress, update operations are temporarily blocked,
but read operations can still proceed.
> Blocking update operations can be real issue specifically in client server environments,
because user requests will be blocked for a long time if a 
> backup is in the progress on the server.

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