Decompressing Elasticsearch 2 snapshot metadata

Elastic Stack Elasticsearch
1

Hello,

I used to be able to manually decompress Elasticsearch 1.7 snapshot metadata (and thus read index settings and mappings) by using a LZF decompressor. With Elasticsearch 2.x this appears to be no longer the case. How can I manually decompress the new snapshot metadata files?

Nicola

2

What is ES1, ES2? Sorry I don't understand the question.

3

I edited the question to clarify.

4

I have no idea but @Igor_Motov might know.

Wondering why you are doing that though?

5

Because I need to extract the mappings from a large snapshot and I don't want to restore it.

6

It is quite complicated now due to the format change. The metadata is now stored in SMILE format (not JSON as it was before) and is preceded by a header with format version and followed by footer with checksum that is checked during restore to make sure the file wasn't corrupted. You can find a snippet of the code that reads these files here