Hi,
Setup:
20 tapes (VXA-2 v-23) Native capacity 67GB.
1 dump cycle.
Amanda version 2.4.2p2
Holding disk 105GB
All DLE are Samba shares for Win95/98/NT6/Win2000.
Problem:
I am now 7 tapes into the second rotation and the level 0 backups are being
overwritten. It seems to be due to the large size of incrementals being
archived on a daily basis. There are numerous days where Amanda only does
incremental (level 1) and even so Amanda is not able to fit them all onto
the daily tape. Paul (see below) suggested as one of the options is to
patch Amanda to allow a higher level (2,3,4...) backups to be done with
Samba shares, thereby reducing the size of daily incrementals. I know that
this would result in greater numbers of tape that would have to be accessed
to restore the data but I am willing to live with that issue.
Solutions?
From Paul's response I may have wrongly assumed that all that would be
required to "fake" level 2, 3 etc... backups would be to toggle the windows
archive bit when Amanda is doing incremental archives. Unfortunately, I am
not a programmer. Though I did searched through the source code I could not
find where to add the switch archive bit code. If I am not completely out
to lunch, I would appreciate any pointers required to implement. If I am
bouncing off the walls any other suggestions to solving my problem are
appreciated as long as it does not involve additional hardware.
Thanks all!
Vytas
At 11:07 AM 3/24/03 +0100, Vytas Janusauskas wrote:
What must I do to ensure that all my level 0 are not overwritten before
they are archived a second time? I have days where lots of new files get
created. Can some explain why none of my backups are ever level 2 or higher?
At 11:07 AM 3/24/03 +0100, Paul Bijnens wrote:
When using smbclient to backup the builtin tar command uses the "archive
bit" of the FAT/NTFS file system to determine "incremental" backup.
The bit contains only a enough state to emulate a level 1 incremental backup:
A full backup runs:
smbclient ... -Tqca -
-a means reset the archive bit
An incremental backup runs:
smbclient ... -Tqcg -
-g means only files with archive bit set, i.e. everything
changed since last full backup.
It's a limitation of PC filesystems and smbclient. There once existed
an idea to modify the amanda sources to reset the archive bit on
incremental runs too, and let amanda do the bookkeeping on the dumplevels
but I've never seen patches for this...
Vytas Janusauskas
Dendron Resource Surveys Inc.
880 Lady Ellen Place, Suite 206
Ottawa, Ontario, Canada
K1Z 5L9
Voice: (613) 725-2971
Fax: (613) 725-1716
<mailto:vytas AT dendron DOT com>
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