Fredrik Malmborg 2010 June 10 14:15:32This week I implemented DAOS at another customer. They were about to run out of disk space.
DAOS did as I expected, it released close to 50% of the disk used by Domino. So now they don't have to buy more disks and backup completes faster.
But next morning users could not open attachments in mail. In server log it says:
The database d:\Lotus\Domino\Data\mail\abcdef.nsf was unable to open or read the file Document attachment is invalid
That was not what I wanted to see. Then I found out that the backup was still running. Had it halted, but still no change.
Run RESYNC on DAOS, but still same error.
Did an emergency update from 8.5.1 FP2 with HF for DAOS, to 8.5.1 FP3 (was released the other day). And now the error messages were gone. Felt great.
But they came back. Suspected the backup for being rude against Domino. They use Ahsay for backup. Found out that it was working overtime taking backup of the domino\data folder.
Now we reconfigured the backup to not include data\domino because it is not critical in this installation. It can be restored from Lotus Domino setup.
After running for 2 days without errors I conclude that the backup application does something with the files in the DAOS folder (using default location under data). Backup now finishes long time before the users get on.
In the log we also have this nice error:
Process C:\Program Files\AhsayOBM\jvm\bin\bJW.exe (3572/0xDF4) has terminated abnormally
It is the Process Monitor in Domino that senses that a program did not tell Domino that it was about to stop. Usually it is not a problem. But I find it annoying with messages like that in the log.
To sum up, get the latest fixpack and make sure to monitor your backup while using DAOS. You also have to put some extra effort on planning backup with DAOS enabled. If not, it can become a real pain when you have to restore a maildatabase.
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