On Tue, Feb 21, 2017 at 9:32 AM, Esther Terrero <esther.terr...@ericsson.com > wrote:
> Hi, > > > > Thanks a lot for the quick response. > > > > Please, see my doubts below. > > > > Thanks again and best regards/ > > Esther > > > > *From:* Tom Pantelis [mailto:tompante...@gmail.com] > *Sent:* martes, 21 de febrero de 2017 12:48 > *To:* Esther Terrero <esther.terr...@ericsson.com> > *Cc:* controller-dev@lists.opendaylight.org > *Subject:* Re: [controller-dev] Questions about Backup&Restore > > > > > > > > On Tue, Feb 21, 2017 at 6:34 AM, Esther Terrero < > esther.terr...@ericsson.com> wrote: > > Hello, > > > > Please, I would appreciate if you could clarify me the questions below > regarding backup and restore: > > > > 1. I see that when snapshots are generated they are generated for > both the configuration and the operational data. What is the reason for > having snapshots for operational data that are not going to be restored? > > A snapshot also contains the election term info and peer configuration > which is needed for raft. > > (Esther) Then the election term info and the peer configuration, are they > in both snapshots for config data and operational data even if they are > redundant? (I understand that operational and config data are in the same > shard, correct?) > No - operational and config data are in different shards. > > 2. Upon performing a backup by means of the > cluster-admin:backup-datastore rpc, is writing on the datastore stopped to > ensure consistency while the backup takes place?, i.e., is the consistency > ensured, for instance suspending modifications to the data (from NBI/SBI > traffic) while the backup takes place? > > A backup does not suspend anything - it merely takes a snapshot. > > (Esther) How do we ensure then that while the snapshot is being taken in > information there is consistent? > > > > 3. If we use LevelDB journaling, is LevelDB compaction blocked > while backup takes place? > > > > No. > > 4. Does the backup generation imply the generation of an snapshot? > If so, are the latest entries of the journal included in that snapshot? > > > > Yes > > > > Thanks a lot in advance and best regards/ > > Esther Terrero > > > > > _______________________________________________ > controller-dev mailing list > controller-dev@lists.opendaylight.org > https://lists.opendaylight.org/mailman/listinfo/controller-dev > > >
_______________________________________________ controller-dev mailing list controller-dev@lists.opendaylight.org https://lists.opendaylight.org/mailman/listinfo/controller-dev
