In a recent discussion on widely out of balance dumps and
frequent promotions to level 0 dumps I noted this about
my configuration.
On Thu, Feb 13, 2020 at 11:50:34PM -0500, Jon LaBadie wrote:
...
>
> My default {dump/runsper}cycle is 7 days, set in amanda.conf.
> But more than 1/2 of my DLEs have custom dumpcycles (14,21,and
> 28 days) set in their dumptypes. You can not set custom values
> for runspercycle in dumptypes (bummer!!).
>
I decided to give amanda's planner a different scenario, long
dumpcycles and daily runspercycle to see if that would have an
effect on the balances and promotions. It seems to be working.
Using "amadmin <config> balance", the report shows the
expected high balance over the next 28 days only exceeds 57%
one time. On that one date, 5 DLEs are scheduled to dump 350%
of the balanced amount. But the 3 days before that are well
under balance, so perhaps the planner will promote some of
the 5 DLEs.
Here are the changes I made.
In "amanda.conf", dumpcycle and runspercycle were both changed
from 7 to 28 days.
In "disklist" I had many entries that defaulted to 7 day cycles
like:
cyber.jgcomp.com Root / comp-root-tar
and many othere entries with longer dumpcycles like:
cyber.jgcomp.com Vault-Monthly /opt/vault-monthly {
comp-user-tar
dumpcycle 28
}
I made NO changes to disklist. Thus it seems like Root above
would get the default 28 day dumpcycle rather than the desired
7 day. To fix this I edited the "dumptypes" file. The dumptype
"global" is incorporated into nearly every other dumptype so
I added a dumpcycle line.
define dumptype global {
comment "Global definitions"
index yes
record yes
auth "bsdtcp"
# added jhl 2/13/2020
dumpcycle 7
}
So now, DLE Root gets its dumpcyle from the global dumptype
(7 days), Vault-Monthly overrides the global value to 28 days,
and amanda's planner uses the default value from amanda.conf,
also 28 days.
The primary downside is an administrative one. If someone
adds a new DLE they might expect it to get the default from
amanda.conf when that is actually overridden by the global
dumptype.
If I see any surprise effects from these changes I'll report
back. But so far (12 days) it has been fine.
Jon
--
Jon H. LaBadie j...@jgcomp.com
11226 South Shore Rd. (703) 787-0688 (H)
Reston, VA 20190 (703) 935-6720 (C)
