[SOLR-3755] shard splitting

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 4.3, 6.0
• Component/s: SolrCloud
• Assignee: Shalin Shekhar Mangar
• Reporter: Yonik Seeley
• Created: 23/Aug/12 21:43
• Updated: 09/May/16 18:49
• Resolved: 21/Apr/13 08:28

Description

We can currently easily add replicas to handle increases in query volume, but we should also add a way to add additional shards dynamically by splitting existing shards.

Issue Links

• is duplicated by: SOLR-3860 add ability to split shard to collections API
• is duplicated by: SOLR-2593 A new core admin action 'split' for splitting index
• is duplicated by: SOLR-2595 Split and migrate indexes
• relates to: SOLR-4695 Fix core admin SPLIT action to be useful with non-cloud setups
• relates to: SOLR-4744 Version conflict error during shard split test
• relates to: SOLR-4795 Sub shard leader should not accept any updates from parent after it goes active
• relates to: SOLR-4745 Do not pass a SolrCore in ZkController.preRegister()

Sub-Tasks

• add hash range to shard: Closed
• Doc-to-shard assignment based on "range" property on shards: Resolved
• add ability to split shard to collections API: Resolved
• Read/Write shard’s state to ZooKeeper: Resolved
• Provide a way to change the 'logical' state of multiple shards atomically: Resolved