Enhancement: add command to set indices to read_only

[faxm0dem]

I'm not sure this has any performance advantages (I'm eager to know if it does), but it might come in handy: add a command to curator to set index.blocks.read_only to true or false.

[untergeek]

It has no improvement on performance whatever.

Technically speaking, once an index has been optimized to 1 segment per shard, and had bloom filters disabled, there's not really anything else at the software level that will improve performance in any way.

It may be a useful feature for preventing writes. Elasticsearch isn't really even using this feature yet, so this will be on the back-burner for a while.

[faxm0dem]

You mean, apart from closing the index :-)
Thanks!