On 03/27/2013 11:41 AM, Kamil Jońca wrote:
Jean-Louis Martineau <martin...@zmanda.com> writes:
On 03/27/2013 08:58 AM, Kamil Jońca wrote:
Jean-Louis Martineau <martin...@zmanda.com> writes:
On 03/27/2013 06:39 AM, Kamil Jońca wrote:
(This is duplicate mail, previously sent, but I weren't subscribed)
In some sites there is suggestion, that config:
--8<---------------cut here---------------start------------->8---
#flush-threshold-dumped 100 # (or more)
#flush-threshold-scheduled 100 # (or more)
#taperflush 100
#autoflush yes
--8<---------------cut here---------------end--------------->8---
helps to do better tape utilization.
But how behave amanda in my configuration (+ these four lines above):
I have defined 1gb vtapes, placed onto four hard disks rotated
(ie. first flush go to disk 1, second to 2, third to 3, fourth to 4,
fifth to 1, and so on)
say on first disk are tapes: alfa-1-1 to alfa-1-10
on second: alfa-2-1 to alfa-2-10
on third: alfa-3-1 to alfa-3-10
on fourth: alfa-4-1 to alfa-4-10
One day dumps takes 1,5GB and goes to tape alfa-1-1 and (partially)
alfa-1-2.
Amanda should not write to alfa-1-2 if the above setting are commented out.
Are you using a holding a disk? It must be larger than a vtape (1gb).
My bad. I forgot to say that I have runtapes greater than 1.
And my question is what amanda do if above flush settings are not
commmented.
Amanda should not write to alfa-1-2, the backup should stay in the
holding disk.
Yes, I use holding disk.
So far I do not have these lines and amanda writes backup to disk (for
example today backup below):
--8<---------------cut here---------------start------------->8---
-rw-r----- 1 backup backup 243 Mar 27 16:27
/var/spool/amanda/vtapes/state
-rw------- 1 backup backup 39436 Mar 27 16:23
/var/spool/amanda/vtapes/slot8/00008.localhost._srv_samba_kopie.2
-rw------- 1 backup backup 33328 Mar 27 16:23
/var/spool/amanda/vtapes/slot8/00009.localhost._var_lib_samba.1
-rw------- 1 backup backup 25797104 Mar 27 16:23
/var/spool/amanda/vtapes/slot8/00010.localhost._var_spool_news_archive.1
-rw------- 1 backup backup 58407680 Mar 27 16:23
/var/spool/amanda/vtapes/slot8/00003.localhost._home_kjonca_Mail.6
-rw------- 1 backup backup 63076 Mar 27 16:23
/var/spool/amanda/vtapes/slot8/00004.localhost._home_kjonca_Muzyka.1
-rw------- 1 backup backup 16056464 Mar 27 16:23
/var/spool/amanda/vtapes/slot8/00005.localhost._home_kjonca_archiwum.2
-rw------- 1 backup backup 48955192 Mar 27 16:23
/var/spool/amanda/vtapes/slot8/00006.localhost._srv_archiwa.2
-rw------- 1 backup backup 43736 Mar 27 16:23
/var/spool/amanda/vtapes/slot8/00007.localhost._srv_samba.1
-rw------- 1 backup backup 34024 Mar 27 16:23
/var/spool/amanda/vtapes/slot8/00002.localhost._home_kjonca_Drivers.1
-rw------- 1 backup backup 133441876 Mar 27 16:23
/var/spool/amanda/vtapes/slot8/00001.localhost._home_kjonca_Downloads.2
-rw------- 1 backup backup 32768 Mar 27 16:23
/var/spool/amanda/vtapes/slot8/00000.alfa-2-8
-rw------- 1 backup backup 965672960 Mar 27 16:23
/var/spool/amanda/vtapes/slot7/00008.localhost._home_kjonca_Downloads.2
-rw------- 1 backup backup 53746648 Mar 27 16:23
/var/spool/amanda/vtapes/slot7/00006.localhost._home_kjonca.3
-rw------- 1 backup backup 81132 Mar 27 16:23
/var/spool/amanda/vtapes/slot7/00007.localhost._home_kjonca_CalibreLibrary.1
-rw------- 1 backup backup 34692104 Mar 27 16:23
/var/spool/amanda/vtapes/slot7/00002.bambus.kjonca._home.2
-rw------- 1 backup backup 59360 Mar 27 16:23
/var/spool/amanda/vtapes/slot7/00003.localhost._etc.1
-rw------- 1 backup backup 164232 Mar 27 16:23
/var/spool/amanda/vtapes/slot7/00004.localhost._home.1
-rw------- 1 backup backup 19114828 Mar 27 16:23
/var/spool/amanda/vtapes/slot7/00005.localhost._home_f4y.1
-rw------- 1 backup backup 52240 Mar 27 16:23
/var/spool/amanda/vtapes/slot7/00001.bambus.kjonca._etc.1
-rw------- 1 backup backup 32768 Mar 27 16:23
/var/spool/amanda/vtapes/slot7/00000.alfa-2-7
--8<---------------cut here---------------end--------------->8---
As we can see amanda fills two vtapes (slot7 and slot8).
And my experience shows that (WITHOUT flush-* settings mentioned above)
at next run (with this disk) amanda will use next slot. Right?
right
What amanda do when these flush-* will be set to 100?
man amanda.conf: search for flush-threshold-dumped and
flush-threshold-scheduled.
It will not write to the second vtape, it will keep the backup in the
holding disk.
It will write to the next available vtape on the following run.
They should be written to vtape on the next run or when you have more than 1GB
(100% of 1gb) of dump on holding disk.
Uncommenting the above setting is useless if you do not use a holding
disk.
Yes, of course.
Did you read the documentation?
Yes. But I do not know which vtape amanda use at some of next run.
The one available when it try to write to a vtape.
(Because tomorrow I will put disk with labels alfa-3-*, on Friday alfa-4-*,
on saturday alfa-1-*, and on Sunday again alfa-2-*)
So tomorrow it will write to alfa-3* and Friday to alfa-4-*
If you want all today's backup to be on alfa-2-*, the these *flush*
parameters are not for you.
Not sure why you change the disk every days, but it's generally BAD
unless you do full every night.
Jean-Louis
