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Jim Witschey edited comment on CASSANDRA-10995 at 1/11/16 10:17 PM:
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One problem we currently have with benchmarking on-disk data size, in
particular w.r.t. compression, is this: we don't have tools that will generate
representative, compressible data. It's easy to generate random data ({{UUID}}
s, random strings from {{cassandra-stress}}).
[~iamaleksey] How important is it that we use such a dataset? You'd know better
than I, but I don't imagine compressibility would effect resource utilization
other than disk much.
was (Author: mambocab):
One problem we currently have with benchmarking on-disk data size, in
particular w.r.t. compression, is this: we don't have tools that will generate
representative, compressible data. It's easy to generate random data
({{UUID}}s, random strings from {{cassandra-stress}}).
[~iamaleksey] How important is it that we use such a dataset? You'd know better
than I, but I don't imagine compressibility would effect resource utilization
other than disk much.
> Consider disabling sstable compression by default in 3.x
> --------------------------------------------------------
>
> Key: CASSANDRA-10995
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10995
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Aleksey Yeschenko
> Assignee: Jim Witschey
>
> With the new sstable format introduced in CASSANDRA-8099, it's very likely
> that enabled sstable compression is no longer the right default option.
> [~slebresne]'s [blog post|http://www.datastax.com/2015/12/storage-engine-30]
> on the new storage engine has some comparison numbers for 2.2/3.0, with and
> without compression that show that in many cases compression no longer has a
> significant effect on sstable sizes - all while sill consuming extra
> resources for both writes (compression) and reads (decompression).
> We should run a comprehensive set of benchmarks to determine whether or not
> compression should be switched to 'off' now in 3.x.
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