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The pull requests adds support for tablets in Alternator, and particularly focuses in getting Alternator's GSI and LSI (i.e., materialized views) to work. After this series support for tablets in Alternator _mostly_ work, but not completely: 1. CDC doesn't yet work with tablets, and Alternator needs to provide CDC (known as "DynamoDB Streams"). 2. Alternator's TTL feature was not tested with tablets, and probably doesn't work because it assumes the replication map belongs to a keyspace. Because of these reasons, Alternator does not yet use tablets by default and it needs to be enabled explicitly be adding an experimental tag to the new table. This will allow us to test Alternator with tablets even before it is ready for the limelight. Fixes #16203 Fixes #16313 Closes scylladb/scylladb#16353 * github.com:scylladb/scylladb: mv, tablets, alternator: test for Alternator LSI with tablets mv: coroutinize wait code for remote view updates mv, test: add injection point to delay remove view update alternator: explicitly request synchronous updates for LSI alternator: fix view creation when using tablets alternator: add experimental method to create a table with tablets