New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Separate the expiration list into multiple buckets #160

Open

shafreeck opened this issue Dec 26, 2019 · 0 comments

Labels

Milestone

Contributor

shafreeck commented Dec 26, 2019 •

edited

Loading

The implementation of the expiration list now is a big list of keys that shares a common prefix. There are two problems with this design.

If all the keys set with at some TTL, the expiration time acts like an incrementing ID which may cause write hotspot on a single region.
The expiration items are deleted sequentially, which causes a continuous range of tombstone keys. It has a big impact on the performance of RocksDB

shafreeck added the enhancement label

shafreeck modified the milestone: Release 1.0

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment