Il giorno gio 16 apr 2020 alle ore 15:01 Subash K <[email protected]> ha scritto:
> Hi Enrico, > > > > Thanks for your response. > > > > I’ve following queries on top of your response: > > - In general is community planning to test and support issues in > rollback of Bookkeeper down the lane? > > Unfortunately no. We are only testing regular upgrades, not rollback. It should be doable with current docker based integration testing tools. > > - > - We might not frequently upgrade Bookkeeper unless it is demanded by > Pulsar. In that case, we might skip few intermediate versions and upgrade > directly to an higher version. In that case, are we foreseeing any > compatibility change that will cause hinderance during rollback? > > Usually this is not a problem. As far as you continue to upgrade from a supported version to a supported version. If I remember correctly currently we are officially supporting only BK 4.8 to 4.10. > > - > - I’ve not fully gone through the internal working of Bookkeeper. But > I would like to understand, can old version of bookie(after rollback) > access the new data stored by upgraded bookie? > > Usually yes, as far as you do not activate new features that need a new format of data on disk Enrico > > - > > > > Regards, > > Subash Kunjupillai > > > > *From:* Enrico Olivelli <[email protected]> > *Sent:* 16 April 2020 16:05 > *To:* user <[email protected]> > *Subject:* Re: Rollback of Apache Bookeeper > > > > Hi Subash, > > usually by default there is no problem in rolling back to the previous > version. > > For instance if you are running 4.9 and you upgrade to 4.10 your bookies > you can downgrade to 4.9 just by using the old code. > > This is because we introduce new features but they are disabled by default > at least for one release. > > > > But I suggest you to perform a test about the rollback before going to > production > > > > Enrico > > > > > > Il giorno gio 16 apr 2020 alle ore 12:23 Subash K <[email protected]> > ha scritto: > > Hi, > > > > We are planning to introduce Apache Pulsar in our product. In general we > always support upgrade and rollback of our product. > > > So I'm trying to understand is there any defined steps provided to support > rollback of Apache Bookeeper to its earlier version after completing full > cluster upgrade? I was not able to find those information in > https://bookkeeper.apache.org/docs/latest/admin/upgrade/ > <https://slack-redir.net/link?url=https%3A%2F%2Fbookkeeper.apache.org%2Fdocs%2Flatest%2Fadmin%2Fupgrade%2F&v=3> > > > > Regards, > > Subash Kunjupillai > > > >
