Please note that by setting a custom field in the collection’s
block_compressor setting, this setting will be permanently set on the
collection and cannot be overridden.
Is there a possibility to do that on a secondary without having to resync
the whole DB?
It is possible to mix different storage engines in a replica set, but it is
currently not possible (as of MongoDB 3.2) to set different storage engine
*options* for a collection in a replica set. I.e., if you custom-specify a
collection to use no compressor, the collection will not be using
compression across all secondaries as well (since collection creation
options are replicated to the secondaries, and cannot be changed once the
collection is created).
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