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From Matteo Bertozzi <theo.berto...@gmail.com>
Subject Re: [DISCUSSION] Merge Backup / Restore - Branch HBASE-7912
Date Wed, 20 Jul 2016 00:02:36 GMT
I did some review in the early beginning, but then lost track of the
changes.
but I'd like to give a quick review to the full code once people here are
ok with getting this feature in master (2.0).
(let say we put a deadline for reviews, like 1 week for reviewing the full
stuff after everyone agrees to get this in. just to avoid holding this for
too long, but still enough time to have people that are interested to look
at it. with did the same thing for MOB with a mega patch
https://reviews.apache.org/r/36391/)

most of the code seemed isolated from the beginning, few changes here and
there in the core.
so, this side of things seems ok to me.

maybe some work to add IT tests as mentioned above, but that should not
take long.

I don't know if there are already docs, but that is another thing we may
want to get in with the merge.
a minimal coverage at least on how to use the feature, and maybe calling it
out as experimental?

my main concern were around incremental backups.
I'm still not convinced around the fact that because the WALs contain
regions of multiple tables
the incremental backup will keep around WALs with some data that we don't
really want in the backup (for space or maybe security reason).

then there was the question about for how long should I take incrementals,
before deciding that a fresh full backup is less costly in terms of space.
but I think this incremental merge/compaction was a feature on the roadmap
as Phase3.
which I think is ok to get later on,
maybe just call out a lifecycle example on the docs under "best practices".


has anyone interested in using backups looked at the doc in HBASE-7912?
is the current design of incremental backup acceptable for everyone wanting
to use this feature?
(maybe this should be a question for the @user list and not dev)

is there anyone already using this feature or it is just dev testing it?
to me will be interesting having a use-case/workflow example,
to see if in the real world my concerns about incremental are not showing
up.

On Tue, Jul 19, 2016 at 1:35 PM, Ted Yu <yuzhihong@gmail.com> wrote:

> Gentle ping on this subject.
>
> The changes are mostly non-intrusive.
>
> More comments are welcome.
>
> On Mon, Jul 11, 2016 at 9:29 PM, Vladimir Rodionov <vladrodionov@gmail.com
> >
> wrote:
>
> > Not that hard, Andrew. I will open JIRA.
> >
> > -Vlad
> >
> > On Mon, Jul 11, 2016 at 8:46 PM, Andrew Purtell <
> andrew.purtell@gmail.com>
> > wrote:
> >
> > > How hard would it be to convert what you've been using to test end to
> end
> > > during dev into an IT?
> > >
> > >
> > > On Jul 11, 2016, at 5:31 PM, Vladimir Rodionov <vladrodionov@gmail.com
> >
> > > wrote:
> > >
> > > >>> Is there an integration test in hbase-it yet? If not, any tips
on a
> > > >>> semi-automateable way to take backups and restore them?
> > > >
> > > > We do not have yet, but we have a lot of unit tests. We provide 2 API
> > for
> > > > backup:
> > > >
> > > > 1. Admin.getBackupAdmin
> > > >
> > > > 2. Command - line via hbase command.
> > > >
> > > > Everything is straightforward.
> > > >
> > > > -Vlad
> > > >
> > > >
> > > >
> > > >
> > > >> On Mon, Jul 11, 2016 at 5:23 PM, Dima Spivak <dspivak@cloudera.com>
> > > wrote:
> > > >>
> > > >> Is there an integration test in hbase-it yet? If not, any tips on
a
> > > >> semi-automateable way to take backups and restore them?
> > > >>
> > > >> -Dima
> > > >>
> > > >> On Mon, Jul 11, 2016 at 6:42 PM, Vladimir Rodionov <
> > > vladrodionov@gmail.com
> > > >> wrote:
> > > >>
> > > >>> Sorry, wrong links:
> > > >>> These are the phases:
> > > >>>
> > > >>> Phase 1:
> > > >>> https://issues.apache.org/jira/browse/HBASE-
> > > >>> <https://issues.apache.org/jira/browse/HBASE-14030>14030
> > > >>> Phase 2:
> > > >>> https://issues.apache.org/jira/browse/HBASE-
> > > >>> <https://issues.apache.org/jira/browse/HBASE-14123>14123
> > > >>> Phase 3:
> > > >>> https://issues.apache.org/jira/browse/HBASE-
> > > >>> <https://issues.apache.org/jira/browse/HBASE-14414>14414
> > > >>>
> > > >>> -Vlad
> > > >>>
> > > >>> On Mon, Jul 11, 2016 at 4:41 PM, Vladimir Rodionov <
> > > >> vladrodionov@gmail.com
> > > >>> wrote:
> > > >>>
> > > >>>> These are the phases:
> > > >>>>
> > > >>>> Phase 1:
> > > >>>> https://issues.apache.org/jira/browse/HBASE-
> > > >>>> <https://issues.apache.org/jira/browse/HBASE-7912>14030
> > > >>>> Phase 2:
> > > >>>> https://issues.apache.org/jira/browse/HBASE-
> > > >>>> <https://issues.apache.org/jira/browse/HBASE-7912>14123
> > > >>>> Phase 3:
> > > >>>> https://issues.apache.org/jira/browse/HBASE-
> > > >>>> <https://issues.apache.org/jira/browse/HBASE-7912>14414
> > > >>>>
> > > >>>> -Vlad
> > > >>>>
> > > >>>>
> > > >>>> On Mon, Jul 11, 2016 at 12:21 PM, Enis Söztutar <enis@apache.org>
> > > >> wrote:
> > > >>>>
> > > >>>>> As you guys may already be familiar, Vladimir, Ted, Jerry
and
> > others
> > > >>> have
> > > >>>>> been developing the backup / restore functionality in
a series of
> > > >> issues
> > > >>>>> committed in the separate branch HBASE-7912[1].
> > > >>>>>
> > > >>>>> Backup / Restore functionality is tracked as a 4-phase
project,
> and
> > > >> the
> > > >>>>> first two phases are complete and useable. We are now
working on
> > > >> Phase 3
> > > >>>>> items, which are mostly improvements. We think that the
current
> > code
> > > >> in
> > > >>>>> the
> > > >>>>> branch containing all Phase 1 and Phase 2 items, and some
Phase 3
> > > >> items
> > > >>> is
> > > >>>>> useable on it's own, and we do not have to wait for all
the
> > > subtickets
> > > >>> to
> > > >>>>> be finished to make it completely useable (as follow up
tickets
> are
> > > >>> mostly
> > > >>>>> improvements or optimizations). The improvements in the
works are
> > all
> > > >>>>> backwards compatible with the existing stuff. Thus, we
would like
> > to
> > > >>>>> propose that the branch HBASE-7912 be merged into master.
 The
> > parent
> > > >>> jira
> > > >>>>> has a design doc that goes into details about the implementation
> > and
> > > >>>>> design
> > > >>>>> choices in case you are interested[2].
> > > >>>>>
> > > >>>>> Most of the changes are largely non-intrusive and confined
to the
> > > >>>>> backup subsystem.
> > > >>>>> The unit tests have been passing on manual runs and we
> > (hortonworks)
> > > >>> have
> > > >>>>> been running the integration tests as well as some other
> > shell-based
> > > >>>>> system
> > > >>>>> tests on a forked version of the code. Most of the work
has been
> > > >>> reviewed
> > > >>>>> by 1, 2 or 3 committers already (mostly Ted, myself and
Jerry).
> > > >>>>>
> > > >>>>> What do you guys think? Is it time to call a vote? Any
concerns
> or
> > > >>>>> feedback
> > > >>>>> appreciated.
> > > >>>>>
> > > >>>>> [1] https://issues.apache.org/jira/browse/HBASE-7912
> > > >>>>> [2]
> > > >>
> > >
> >
> https://issues.apache.org/jira/secure/attachment/12816339/HBaseBackupAndRestore%20-0.91.pdf
> > > >>>>>
> > > >>>>> Enis
> > > >>
> > >
> >
>

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