Cluster wide Bitcask merge synchronization about bitcask

[evanmcc]

I don't think that this is a good idea. The mechanism would be complicated and likely fragile. I think that the best way to address this is to reduce the impact of merging on any given node to the point where we no longer care that it's going on.

Something like this might be possible in the future when there is consistent cluster metadata, but hopefully we'll have solved the core problem by then.

[bsparrow435]

How about a warning in the logs that nodes share merge windows? Since a merge_window is a global bitcask setting it should be a simple rpc:multicall to get the merge windows from all nodes and comparing them is easy.

[evanmcc]

but wouldn't you get a warning by default? I'd rather put the effort into making merges suck less, really.