All right,
Let's say I configure a 2TB holding disk for amanda and I have 2
projects. If that holding disk contains folders from both projects,
will amanda know which one belongs to which before dumping?
Also, what changes do I need to make to my config file so my
incremental backups behave like real incremental, meaning if nothing
changes, nothing is written to tape/holding disk.
Thank You
-Wojtek
On Fri, Apr 3, 2009 at 9:15 AM, Jean-Louis Martineau
<martineau AT zmanda DOT com> wrote:
> Amanda use a new tape at every run. If you configure a big enough holding
> disk, amanda can be configured to write to a tape only it is has enough data
> in holding disk to fill the tape.
>
> You must at least do one full backup, you are configure to do only level 1
> backup, but they are relative to a non-existant full backup, that's why your
> incremental include all files.
>
> Jean-Louis
>
> Wojtek wrote:
>>
>> Hello there,
>>
>> We recently installed Amanda to be able to permanently backup files to
>> tapes.
>> Those tapes will never be deleted and will only be kept in storage if
>> down the road some file from them is required.
>>
>> Every week, we'll be dumping about 100Gb of files categorized in
>> folders, Amanda will then backup those files to tape, and then the
>> files will be deleted from that folder. Process repeats every week.
>>
>> Now, my problem is the following: I'm able to make Amanda backup my
>> DLE's, however the problem I'm having is that it only does Full
>> backups, and I need only Incremental. I started the amdump process,
>> and right after it finished did another amdump. Files in the DLE's did
>> not change, but amanda wrote 2 seperate tapes with identical data.
>> What I expected was that the second time I did amdump, amanda would
>> 'loop' through the files, see that none changed and do nothing. If any
>> new files would be there, it would write to the first tape until it
>> was full.
>>
>> Since I'm not sure where the problem is coming from, I'll provide you
>> with as much information as possible:
>>
>> ==========
>> amanda.conf:
>> ==========
>> org "ORG"
>> mailto "email AT email DOT com"
>> dumpuser "amandabackup"
>> inparallel 4
>> dumporder "sssS"
>> taperalgo first
>> displayunit "k"
>> dumpcycle 9999 weeks
>> runspercycle 99998
>> tapecycle 99999 tapes
>> etimeout 300
>> dtimeout 1800
>> ctimeout 30
>> device_output_buffer_size 1280k
>> usetimestamps yes
>> flush-threshold-dumped 100
>> flush-threshold-scheduled 100
>> taperflush 0
>> autoflush no
>> runtapes 5
>> tpchanger "chg-zd-mtx"
>> tapedev "tape:/dev/nst0"
>> changerfile "/etc/amanda/Bell/changer.conf"
>> changerdev "/dev/sg5"
>> maxdumpsize -1
>> tapetype LTO4
>> labelstr "^Bell-[0-9][0-9]*$"
>> amrecover_do_fsf yes
>> amrecover_check_label yes
>> amrecover_changer "changer"
>> holdingdisk hd1 {
>> comment "main holding disk"
>> directory "/dumps/amanda"
>> use -100Mb
>> chunksize 1Gb
>> }
>> infofile "/var/amanda/Bell/curinfo"
>> logdir "/var/amanda/Bell"
>> indexdir "/var/amanda/Bell/index"
>> define tapetype LTO4 {
>> comment "Dell LTO4 800Gb - Compression Off"
>> length 802816 mbytes
>> filemark 0 kbytes
>> speed 52616 kps
>> }
>> define dumptype global {
>> comment "Global definitions"
>> auth "bsdtcp"
>> }
>> define dumptype root-tar {
>> global
>> program "GNUTAR"
>> comment "root partitions dumped with tar"
>> compress none
>> index
>> priority low
>> }
>> define dumptype user-tar {
>> root-tar
>> comment "user partitions dumped with tar"
>> priority medium
>> }
>> define dumptype comp-root-tar {
>> root-tar
>> comment "Root partitions with compression"
>> compress client fast
>> }
>> define dumptype comp-user-tar {
>> user-tar
>> compress client fast
>> strategy nofull
>> }
>> define interface local {
>> comment "a local disk"
>> use 8000 kbps
>> }
>>
>>
>>
>> =========
>> change.conf
>> =========
>> firstslot=1
>> lastslot=5
>> driveslot=0
>> havereader=1
>>
>>
>>
>> ======
>> tapelist (before amanda adds the date)
>> ======
>> 0 Bell-01 reuse
>> 0 Bell-02 reuse
>> 0 Bell-03 reuse
>> 0 Bell-04 reuse
>> 0 Bell-05 reuse
>>
>>
>>
>> ======
>> disklist
>> ======
>> earth.domain.info /Bell/Folder1 comp-user-tar
>> earth.domain.info /Bell/Folder2 comp-user-tar
>>
>>
>>
>> Allright, I think that is all the usefull data.
>> As you can see, in amanda.conf I've set the dumpcycle, runspercycle
>> and tapecycle to 99999, thinking it would prevent it from doing a Full
>> backup.
>> In the define dumptype comp-user-tar section, I've also placed the
>> nofull strategy.
>>
>> Yet it is not working as expected.
>>
>> What changes should I make to my config files to be able to accomplish
>> what I described at the beginning?
>>
>> Any tips, suggestions or working sample config files are greatly
>> appreciated :)
>>
>> Thank You
>> -Wojtek
>>
>
>
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