citus

Author	SHA1	Message	Date
Jelte Fennema	cbbd10b974	Implement an improvement threshold in the rebalancer (#4927 ) Every move in the rebalancer algorithm results in an improvement in the balance. However, even if the improvement in the balance was very small the move was still chosen. This is especially problematic if the shard itself is very big and the move will take a long time. This changes the rebalancer algorithm to take the relative size of the balance improvement into account when choosing moves. By default a move will not be chosen if it improves the balance by less than half of the size of the shard. An extra argument is added to the rebalancer functions so that the user can decide to lower the default threshold if the ignored move is wanted anyway.	2021-05-11 14:24:59 +02:00
Jelte Fennema	7730bd449c	Normalize tests: Remove trailing whitespace	2020-01-06 09:32:03 +01:00
Jelte Fennema	7f3de68b0d	Normalize tests: header separator length	2020-01-06 09:32:03 +01:00
Jelte Fennema	b655c02352	Add the necessary changes for rebalance strategies on enterprise (#3325 ) This commit adds the SQL and C changes necessary to support custom rebalance strategies in the Enterprise version of Citus.	2019-12-19 15:23:08 +01:00