[TS-2184] Fetch from cluster with proxy.config.http.cache.cluster_cache_local enabled

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Fix Version/s: sometime
• Component/s: Cache, Clustering
• Assignee: Unassigned
• Reporter: Scott Harris
• Created: 05/Sep/13 23:04
• Updated: 15/Aug/16 22:58

Description

With proxy.config.http.cache.cluster_cache_local enabled I would like cluster nodes to store content locally but try to retrieve content from the cluster first (if not cached locally) and if no cluster nodes have content cached then retrieve from origin.

Example - 2 Cluster nodes in Full cluster mode.
1. Node1 and Node2 are both empty.
2. Request to Node1 for "http://www.example.com/foo.html".
3. Query Cluster for object
4. Not cached in cluster so retrieve from orgin, serve to client, object now cached on Node1.
5. Request comes to Node2 for "http://www.example.com/foo.html".
6. Node2 retrieves cached version from Node1, serves to client, stores locally.
7. Subsequent request comes to Node1 or Node2 for "http://www.example.com/foo.html", object is served to client from local cache.

Issue Links

• blocks: TS-4026 Remove clustering feature in 7.0.0 release
• relates to: TS-2189 enabling proxy.config.http.cache.cluster_cache_local causes all traffic to store local

Sub-Tasks

• Need a way to fetch from the cluster when doing cluster local caching: Open