Disable Cassandra DB migrations

[Rhys Campbell]

Is it possible to disable C* DB migrations in reaper? I'm automating a multi.node reaper setup and I think it might be preferable to prevent the migrations from running on all but one node. I can't find anything in the docs.

Cheers,

Rhys

[Alexander Dejanovski]

Hi Rhys,

you can't disable migrations as they are necessary to bring the database up to date so that Reaper can safely start up.

We've added a consensus system in the migration path in master, so that only one Reaper instance can perform the migration. I have no release date for the code in master (but beta builds are available).

We also pushed a PR upstream in the migration library we're using so that it handles the consensus out of the box and Reaper can rely on it directly.

For now, I advise you to start only one Reaper instance when you upgrade, and once it's up start the remaining ones.

Cheers,

-----------------
Alexander Dejanovski
France
@alexanderdeja

Consultant
Apache Cassandra Consulting

http://www.thelastpickle.com

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