Björn Hegerfors created CASSANDRA-9211: ------------------------------------------
Summary: Keep history of SSTable metadata Key: CASSANDRA-9211 URL: https://issues.apache.org/jira/browse/CASSANDRA-9211 Project: Cassandra Issue Type: Wish Reporter: Björn Hegerfors Similar to the request in CASSANDRA-8078, I'm interested in SSTables' lineage. Specifically, I want to visualize the behaviors of compaction strategies based on real data. For example, for STCS I might want to generate something like this image: http://www.datastax.com/wp-content/uploads/2011/10/size-tiered-1.png. For LCS and DTCS, other properties than size are interesting. As Marcus responded in CASSANDRA-8078, there is already tracking of ancestors in the SSTable metadata. But as far as I know, the metadata gets garbage collected along with the SSTable itself. So what I propose is to persist metadata in a system table. Maybe some, maybe all metadata. Like the compaction_history table, this should have a default TTL of something like one week or just one day. But users can freely modify/remove the TTL. -- This message was sent by Atlassian JIRA (v6.3.4#6332)