Convert bucket from memcached to couchbase


We currently are running Couchbase 1.8.1 with a couple of memcached buckets.

I’m wondering it’s possible to convert them from memcached to couchbase without data loss?

We are also upgrading to Couchbase 2.2.0, so was wondering if it was possible as part of the upgrade or with XCDR, though i believe not.

I have been told however that Couchbase 3.0 will support in memory XCDR, so not sure if that would be an option?