systematic92
10 years agoLevel 5
NDMP - Reason for preliminary file scan?
Hi Guys,
When we do NDMP backups, I believe BEXEC does a preliminary file scan of the directory we are backing up. I believe this read operationtakes place before the write operation. What option in BEXECs job settings does this and can it be disabled?
The reason I ask is because we have a very large folder full of millions of files. And the file scan process is taking up to 4 days to complete! I believe there are two options in BEXECs NDMP setting:
- Enable File History
- Backup Access Control Lists
I understand the first option when unchecked will prevent us from doing single file restores???? Example:
Folder A has files doc1 and doc2 in them. If file history is enabled, we can restore doc1 or doc2. If file history is not enabled, we can only restore Folder A and not select at a more granular level?
Is that correct?
The second option of backing up access control lists seems self explanatory however, I question if this in fact needs to be enabled. Example:
doc1 originally resides in FolderA and has read-only perms for the Finance Department.
If access control lists option was enabled, then doc1 would retain the read-only perms for the finance department if restored. If access control lists option was disabled, the doc1 would be restored without any security permissions. I am assuiming that if the latter was true, the ACLs would immediately propagate once the file was placed in its original location on the network (via inherited permissions etc.)
Is my understanding correct?
I would be grateful for an answer but most importantly I would really like to stop the read only operation of file scanning before writing. it is killing us.
Thanks,