Hi, Data are both duplicated to suit different access patterns and compressed. There are so many compression algorithms in-place that it would be hard to be exhaustive, but we have for instance Frame-Of-Reference compression for postings lists, LZ4 for the document store, bit packing for numeric doc values, ...
There are no configurations options available to configure compression besides disabling features that you don't need (such as norms on fields that you don't score on). In the next major version of elasticsearch (2.0) there will be a setting to enable heavier compression though (which in practice will use DEFLATE instead of LZ4 for the document store): https://github.com/elastic/elasticsearch/pull/8863 On Tue, Apr 14, 2015 at 6:47 PM, <[email protected]> wrote: > I would like to know if Elasticsearch documents/indices are stored in > compressed format on disk . If yes, what type of compression options are > available and it's performance overheads. > > and if these compression options are configurable. > > Thanks > Ajay > > -- > You received this message because you are subscribed to the Google Groups > "elasticsearch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/elasticsearch/8c63c25f-4f49-47f4-8d0a-772d3301f45c%40googlegroups.com > <https://groups.google.com/d/msgid/elasticsearch/8c63c25f-4f49-47f4-8d0a-772d3301f45c%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- Adrien -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/CAO5%3DkAiF5uRZmGCocKgjeiuBahpsc1iMZ-7XkQWFzWK3hVWPvg%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
