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Radim Kolar commented on CASSANDRA-5473:
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i have not checked other patch code but you have to create file part, mmap it,
write to memory, unmap, enlarge file, mmap next segment, write, unmap and
truncate file to desired size.
> Use mmaped buffered write for ldb segments
> ------------------------------------------
>
> Key: CASSANDRA-5473
> URL: https://issues.apache.org/jira/browse/CASSANDRA-5473
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Radim Kolar
> Labels: performance
> Attachments: leveldb.ods
>
>
> it increases throughput, especially in compations.
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