AZ64压缩格式性能

Question

AWS Redshift最近发布了自己的新编码格式AZ64，他们说：

与ZSTD编码相比，AZ64消耗的存储空间减少了5–10％，速度提高了70％

当我使用A时，ANALYZE COMPRESSION my_table我仍然收到ZSTD其所有列的编码格式。

因此，是否真的建议将其作为ZSTD上的编码格式？我是否会天真的喜欢AZ64？

Answer 1

I got a reply from AWS Support on this question:

TL;DR

About your question preferring AZ64 instead of ZSTD were possible, yes you can do it.

Given AZ64 provide better performance compared to ZSTD

For further exaplanation:

Yes, AZ64 is better than ZSTD. It has comparable compression, when compared with ZSTD but greatly better performance, which is something you would have already learned using. As of now ANALYZE COMPRESSION command doesn't support AZ64, also I don't have an ETA on when AZ64 will be available with ANALYZE COMPRESSION. I will suggest you to keep an eye on

• https://docs.aws.amazon.com/redshift/latest/mgmt/rs-mgmt-cluster-version-notes.html
• https://aws.amazon.com/redshift/whats-new/

有关AWS Redshift的任何更新。我已经与内部服务团队确认了这一点。

ANALYZE COMPRESSION 是一种咨询工具，它根据列建议最佳的列编码。