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From "Steinmaurer, Thomas" <thomas.steinmau...@dynatrace.com>
Subject Configuration parameter to reject incremental repair?
Date Tue, 07 Aug 2018 06:44:22 GMT
Hello,

we are running Cassandra in AWS and On-Premise at customer sites, currently 2.1 in production
with 3.11 in loadtest.

In a migration path from 2.1 to 3.11.x, I'm afraid that at some point in time we end up in
incremental repairs being enabled / ran a first time unintentionally, cause:
a) A lot of online resources / examples do not use the -full command-line option
b) Our internal (support) tickets of course also state nodetool repair command without the
-full option, as these are for 2.1

Especially for On-Premise customers (with less control than with our AWS deployments), this
asks a bit for getting out-of-control once we have 3.11 out and nodetool repair being run
without the -full command-line option.

So, what do you think about a JVM system property, cassandra.yaml ... to basically let the
operator chose if incremental repairs are allowed or not? I know, such a flag still can be
flipped then (by the customer), but as a first safety stage possibly sufficient enough.

Or perhaps something like that is already available (vaguely remember something like that
for MV).

Thanks a lot,
Thomas

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