Port Django management command from Kitsune and Kuma.

[jezdez]

This is work in progress since I need to port over some tests, too ;)

[willkg]

Wow! I'm pretty psyched about this. I skimmed it and it looks good so far. I'm pretty hard up for free time, but after you land some tests and docs, I'll make a point of making time to look through it more carefully.

[robhudson]

Another optimization could be to set num_replicas to zero while re-indexing, which reduces copying data between nodes. Once you're done you can set it back to whatever it was and ES will bulk copy to the replication nodes.

[jezdez]

Nice! Will incorporate this :)

[jezdez]

@robhudson Do you happen to have a reference somewhere that this is supposed to be used like this?

[robhudson]

I've tried to find docs on it but couldn't. If you have enough data locally you could maybe test it both ways and see which is faster. I forget where I learned of this... either the Elasticsearch training or maybe from Hanno while I was writing the reindexing jobs for marketplace?

[mythmon]

I remember hearing about this during ES training, so that's probably where you heard it too.

[willkg]

More specifically, it's a mapping of doctypes -> indexes to write to.