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80e5860a8c
The current state (after PR #26836) is that Alternator tables are created by default using tablets. But due to issue #23838, Alternator Streams cannot be enabled on a table that uses tablets... An attempt to enable Streams on such a table results in a clear error: "Streams not yet supported on a table using tablets (issue #23838). If you want to use streams, create a table with vnodes by setting the tag 'system:initial_tablets' set to 'none'." But users should be able to learn this fact from the documentation - not just retroactively from an error message. This is especially important because a user might create and fill a table using tablets, and only get this error when attempting to enable Streams on the existing table - when it is too late to change anything. So this patch adds a paragraph on this to compatibility.md, where several other requirements of Alternator Streams are already mentioned. Signed-off-by: Nadav Har'El <nyh@scylladb.com> Closes scylladb/scylladb#27000