sdong 9c332aa11a HashLinkList memtable switches a bucket to a skip list to reduce performance outliers ...

Summary:
In this patch, we enhance HashLinkList memtable to reduce performance outliers when a bucket contains too many entries. We switch to skip list for this case to enable binary search.

Add threshold_use_skiplist parameter to determine when a bucket needs to switch to skip list.

The new data structure is documented in comments in the codes.

Test Plan:
make all check
set threshold_use_skiplist in several tests

Reviewers: yhchiang, haobo, ljin

Reviewed By: yhchiang, ljin

Subscribers: nkg-, xjin, dhruba, yhchiang, leveldb

Differential Revision: https://reviews.facebook.net/D19299

2014-07-01 17:14:15 -07:00

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rocksdb

HashLinkList memtable switches a bucket to a skip list to reduce performance outliers

2014-07-01 17:14:15 -07:00

utilities

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2014-06-20 11:14:14 +02:00