[CASSANDRA-2102] saved row cache doesn't save the cache

• Type: Bug
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 0.7.1
• Severity: Normal
• Assignee: Matthew F. Dennis
• Reporter: Matthew F. Dennis

Authors

Matthew F. Dennis

Reviewers

Jonathan Ellis

• Created: 02/Feb/11 22:42
• Updated: 16/Apr/19 09:33
• Resolved: 10/Feb/11 17:09

Description

saving row caches works by periodically iterating of the keySet() on the caches and writing the keys for the cached contents to disk. The cache keys are DecoratedKeys. DecoratedKeys contain a Token token and a ByteBuffer key. The underlying buffer on the key gets reused so the contents change. This means that all the cache entries have distinct tokens but only a handful of distinct key values. This means that when the cache is loaded you only end up loading a handful of keys instead of the ones actually in your cache.