Will DAOS pull attachments from other servers if database is copied from another server?

HCL Domino Domino Forum
1

I have 2 servers with replicas of a database (serverA & ServerB).
V14.0 FP2 on Windows.
The database is about 60 GB physical size. With attachments, it is 1.4 TB. Both servers have DAOS running.
The replica on serverB has become corrupt. Consistency checking is going on and has been for hours. I need it back online ASAP. Can I bring down ServerA with the healthy database and make an OS copy of the database to the ServerB? If I do, will new attachments get populated into DAOS on ServerB?

**Domino/Notes Version: 14.0 FP2
Operating System: Windows server 2019

2

Hi DaveHabz,

Good day! Regarding your concern, an OS copy might work, but it’s recommended to create a replica. This ensures that the copying process and the attachment are handled concurrently in the background. To do this, follow the steps below:

  • Right-click the database.
  • Select “New.”
  • Choose “Replica(s)…”

Hope the above process works with you.

Regards
Sean

1 Like
3

Hello
Notes Large Object (NLO) files stored on Domino’s DAOS (Domino Attachment and Object Service) are encrypted with an ID file unique to that server for security purposes. Therefore, even if the NLO file is copied directly to another server, it cannot be used because the encryption cannot be broken.

In other words, the NLO file is only valid on the server where it was created. If you want to migrate them to another server, you will need to use an appropriate method (e.g. Domino Backup or a migration tool).

To use a common encryption key, the following operations are required in advance.

Regards,
Shigemitsu

4

Hello Dave,

OS copy won’t work as expected since it will have documents with broken links to the attachments. In this scenario, you should always create a new replica from Server A to Server B, since both servers have DAOS enabled, once the replica gets created on server B, attachments will convert into NLO and would go to DAOS repository.

One more thing to highlight here is the size with attachment. You mentioned 1.4 TB. Is this the size for a single database with attachments? This seems quite beyond the size limit for a database and should be a matter of concern.

Hope this helps.

Thanks and Regards
Niraj V Jani