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pre-fetch for scan #5

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qinzuoyan opened this issue Jun 28, 2018 · 2 comments
Open

pre-fetch for scan #5

qinzuoyan opened this issue Jun 28, 2018 · 2 comments
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enhancement New feature or request

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@qinzuoyan
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@qinzuoyan qinzuoyan added the enhancement New feature or request label Jun 28, 2018
@neverchanje
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neverchanje commented Jun 28, 2018 •
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We can first use rocksdb prefix extractor https://github.com/facebook/rocksdb/wiki/RocksDB-Bloom-Filter#prefix-vs-whole-key to improve scan performance, rather than implement a complex prefetch mechanism.

Rocksdb has a paper (http://cidrdb.org/cidr2017/papers/p82-dong-cidr17.pdf Section 4) talking about how to use prefix bloom filter to reduce read amplification.

If we need to improve scan, we can consider about this.

@qinzuoyan
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sure, it's not emergency now

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