[core] Make default of 'lookup.local-file-type' to sort #4622
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Purpose
Linked issue: close #xxx
more test after: https://github.com/apache/paimon/pull/4500/files
The sort format have the advantange as below
Writer
Benchmarks also show that sort format has better write performance. However, hash format is optimized for values with the same value, so when values are the same, sort format may be slightly worse.
Reader
testLookupReaderMiss
100000
15000000
The sort format is much better.
testLookupReader (all match)
100000 value
10000000
The hash format only has a certain advantage when the value size is small or the file size does not fill up the cache. In other cases, the sort format is better.
Tests
API and Format
Documentation