That sounds great! Now here's my question:
I do "nodetool flush", then snapshot the storage. Meanwhile, the DB is
under heavy read/write traffic, with lots of writes per second. What's
the worst that could happen, lose a few writes?
On 2020-11-10 15:59, Jeff Jirsa wrote:
If you want all of the instances to be consistent with each other,
this is much harder, but if you only want a container that can stop
and resume, you don't have to do anything more than flush + snapshot
the storage. The data files on cassandra should ALWAYS be in a state
where the database will restart, because they have to be to tolerate
power outage.
On Tue, Nov 10, 2020 at 3:39 PM Florin Andrei <[email protected]>
wrote:
Running Apache Cassandra 3 in Docker. I need to snapshot the storage
volumes. Obviously, I want to be able to re-launch Cassandra from
the
snapshots later on. So the snapshots need to be in a consistent
state.
With most DBs, the sequence of events is this:
- flush the DB to disk
- "freeze" the DB
- snapshot the storage
- "unfreeze" the DB
What does that sequence translate to, in Cassandra parlance?
What is the sequence of events that needs to happen when I bring the
DB
up from an old snapshot? Will there be a restore procedure, or can I
just start it as usual?
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Florin Andrei
https://florin.myip.org/
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