Hello amanda users,
I have amanda 2.6.1p1 on both client and server, both running
Solaris 10x86.
We have a number of DLE for the client that are ZFS partitions
that provide space for Samba shares.
We are seeing that while the turnover of files on the samba
partitions is very low, we are having level 1 dumps that are
comparable to our level 0 dumps.
We have found that moving from # gtar to # star seems to resolve
the issue.
Was the size of the non-0 dumps a known issue ?
Wondering if there was some other switch we should have thrown ?
Is this a 'valid' solution from the amanda design point of view ?
Including message from my manager to our internal group.
thanks,
Brian
-------- Original Message --------
amanda's level 1 backup when using a zfs snapshot and then the amgtar
application (which call gnu tar)
has been backing up all the files. Thus you have a full backup every
night. We do not want this behavior -
level 1 should be an incremental backup.
I have not had much success in figuring out what the issue is. However,
I have tested an alternative
which still uses a zfs snapshot, and then uses the amstar application
(which calls star
which claims to be "the fastest tar archiver for UNIX").
For now _- I have only change /export/samba/itg to use the new backup
method:
> diff disklist disklist.20100405
9c9
< curie /export/samba/itg user-zfs-amstar
---
> curie /export/samba/itg zfs-snapshot
The "start" software is available at ftp://ftp.berlios.de/pub/star
It turns out that star's incremental backup works - it stores the
information in /etc/tardumps
# cat /etc/tardumps
/export/samba/itg 0 1270746880.034200 Thu Apr 8
13:14:40 2010
/export/samba/itg 1 1270750399.905353 Thu Apr 8
14:13:19 2010
Tested with a level 0:
DUMP SUMMARY:
DUMPER STATS TAPER STATS
HOSTNAME DISK L ORIG-MB OUT-MB COMP% MMM:SS KB/s MMM:SS
KB/s
-------------------------- -------------------------------------
-------------
curie -/samba/itg 0 73451 31090 42.3 45:34 11645.0 6:13
85402.1
(brought to you by Amanda version 2.6.1p1-20091023)
and here is the level 1:
DUMP SUMMARY:
DUMPER STATS TAPER STATS
HOSTNAME DISK L ORIG-MB OUT-MB COMP% MMM:SS KB/s MMM:SS
KB/s
-------------------------- -------------------------------------
-------------
curie -/samba/itg 1 0 0 -- 0:02 1.0 0:00
2263.0
(brought to you by Amanda version 2.6.1p1-20091023)
> pwd
/usr/local/etc/amanda/curie/DailySet1/index/curie/_export_samba_itg
> ls -lt | head -4
total 2690
-rw------- 1 amanda sys 40 Apr 8 14:13 20100408141136_1.gz
-rw------- 1 amanda sys 31935 Apr 8 14:00 20100408131233_0.gz
-rw------- 1 amanda sys 32253 Apr 7 21:58 20100407183000_1.gz
> gzcat 20100408141136_1.gz
/
/./
/test/
/test/x.txt
----- End forwarded message -----
---
Brian R Cuttler [email protected]
Computer Systems Support (v) 518 486-1697
Wadsworth Center (f) 518 473-6384
NYS Department of Health Help Desk 518 473-0773
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