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From Dmitriy Setrakyan <dsetrak...@apache.org>
Subject Re: Compression prototype
Date Tue, 04 Sep 2018 14:15:34 GMT
On Tue, Sep 4, 2018 at 2:55 AM, Ilya Kasnacheev <ilya.kasnacheev@gmail.com>

> Hello!
> Each node has a local dictionary (per node currently, per cache planned).
> Dictionary is never shared between nodes. As data patterns shift,
> dictionary rotation is also planned.
> With Zstd, the best dictionary size seems to be 1024 bytes. I imagine It is
> enough to store common BinaryObject boilerplate, and everything else is
> compressed on the fly. The source sample is 16k records.
Thanks, Ilya, understood. I think per-cache is a better idea. However, I
have a question about dictionary size. Ignite stores TBs of data. How do
you plan the dictionary to fit in 1K bytes?


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