> On Nov 26, 2018, at 2:19 PM, Cuttler, Brian R (HEALTH)
> <brian.cutt...@health.ny.gov> wrote:
>
> Deb,
>
> I'm with you, periodically I have to test something, or will start an
> additional backup to help move data after a failure of some sort but in
> general I allow cron to start # amdump once/day. My understanding matches
> yours, balance will get thrown off, amanda may advance dumps but you chew up
> a lot of tape and do a lot of I/O for little overall gain if you are running
> multiple dumps as a matter of course.
When I have something that failed/was missed OR a new node or DLE to add, I do
amdump config —no-taper node DLE
so test the dump, but leave the results on my holding disk. It’ll be flushed
when tonight’s backup
starts.
So I don’t HAVE to chew up tape, just to test things. :)
Deb Baddorf
>
> I have even gone so far as run run multiple dumps across a very small
> (perhaps "1") DLE to test include/exclude or get a new dumptype (snapshot) or
> compress(pig/parallel zip) tested, but do not run multiple dumps as a matter
> of routine.
>
> In my mind running many small DLEs can be self-defeating, as can running very
> few very large once, each hitting a different set of constraints.
>
> My samba shares are on separate ZFS mount points and I snapshot them. My home
> directories are also on separate ZFS mount points but individual backups were
> untenable so I glob them by letter, but that means I can't do snapshots.
>
> Based on the latest emails I think Chris may have moved on, but he has these
> additional answers for when he cycles back.
>
> Thanks,
> Brian
>
>
> -----Original Message-----
> From: Debra S Baddorf <badd...@fnal.gov>
> Sent: Monday, November 26, 2018 3:00 PM
> To: amanda-users <amanda-users@amanda.org>
> Cc: Debra S Baddorf <badd...@fnal.gov>; Debra S Baddorf <badd...@fnal.gov>;
> Cuttler, Brian R (HEALTH) <brian.cutt...@health.ny.gov>
> Subject: Re: Configuration Rollback [Was: Reusable]
>
> ATTENTION: This email came from an external source. Do not open attachments
> or click on links from unknown senders or unexpected emails.
>
>
>>
>> -----Original Message-----
>> From: owner-amanda-us...@amanda.org <owner-amanda-us...@amanda.org> On
>> Behalf Of Debra S Baddorf
>> Sent: Monday, November 26, 2018 2:04 PM
>> To: amanda-users <amanda-users@amanda.org>
>> Cc: Debra S Baddorf <badd...@fnal.gov>
>> Subject: Re: Configuration Rollback [Was: Reusable]
>>
>> ATTENTION: This email came from an external source. Do not open attachments
>> or click on links from unknown senders or unexpected emails.
>>
>>
>>> On Nov 24, 2018, at 9:47 AM, Chris Nighswonger
>>> <cnighswon...@foundations.edu> wrote:
>>>
>>> On Fri, Nov 23, 2018 at 6:47 PM Jon LaBadie <j...@jgcomp.com> wrote:
>>> On Wed, Nov 21, 2018 at 11:55:21AM -0800, Chris Miller wrote:
>>>> Hi Folks,
>>>>
>>>> I have written some very small DLEs so I can rip through weeks of
>>>> backups in minutes. I've learned some things.
>>>
>>
>> Am I wrong in thinking that you cannot do extra backups, to get to the end
>> of your “dumpcycle” faster?
>> Dumpcycle is explicitly in days, not number of times run. Isn’t it?
>>
>> Deb Baddorf
>> Fermilab
>>
>>
>>
>> On Nov 26, 2018, at 1:21 PM, Cuttler, Brian R (HEALTH)
>> <brian.cutt...@health.ny.gov> wrote:
>>
>> Deb,
>>
>> Not sure if I'm understanding your question. If so I believe Amanda was
>> built with the concept of a once/day run schedule taking into account
>> runs/cycle as well as days/dumpcycle (for instance 5 run days in a one week
>> dump cycle).
>>
>> Brian
>
> Yes, I agree. At one point, Chris was trying to speed this up by doing 21
> runs in 10 minutes or so.
> Perhaps he has stopped that, and people are just continuing to quote that
> line (above). It’s that line that’s bothering me.
>
> He did ask "Can I specify "dumpcycle" as an elapsed count rather than an
> elapsed time?”
> Per the wiki help files, dumpcycle seems to be explicitly in “days” and
> cannot be changed or sped up.
> (
> https://urldefense.proofpoint.com/v2/url?u=https-3A__protect2.fireeye.com_url-3Fk-3D42d018d223e76922.42d2e1e7-2D4a9f6eb7b4f1e3bb-26u-3Dhttps-3A__wiki.zmanda.com_index.php_Dumpcycle&d=DwIGaQ&c=gRgGjJ3BkIsb5y6s49QqsA&r=HMrKaRiCv4jddln9fLPIOw&m=l_nUa8ln6_AcIwhv7dPsFLOJjoUvcO0FZC_Go-Kk0_Q&s=jgJt912esNKK5Qjd43o1uniBJyWyfB4otVSX4o4CDL8&e=
> )
>
> Chris also asked "Are "dumpcycle" and "runspercycle" conflicting with each
> other?”
> Even if you occasionally do extra amdump runs (I do), that doesn’t bother
> the “runspercycle” count. It still results in “at least one level 0 within
> dumpcycle days”. Runspercycle just lets amanda gauge numbers for balance
> adjusting, and maybe promoting a DLE to do an early level 0.
> Doing 21 runs in NN minutes will use up all your vtapes, but will not force
> more than 1 level 0.
>
> Maybe I’m being pedantic, and he’s looking at other issues now. If so,
> nevermind me!
> :)
>
> Deb Baddorf
>
>
>
