[IOTDB-1186] Remove redundant sync meta leader in RemoteSeriesReader for cluster module

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.12.0
• Component/s: Core/Cluster
• Labels: pull-request-available
• Assignee: Chao Wang
• Reporter: Xinyu Tan
• Created: 08/Mar/21 09:17
• Updated: 20/Jun/22 15:40
• Resolved: 09/Mar/21 07:40

Description

Currently, the coordinator will create one remoteSeriesReader for each timeseries if the timeseries belongs to other nodes, and the coordinator will try to perform a sync meta leader in each remoteSeriesReader's initManagedSeriesReader function, which cost a lot of network overhead.

Actually, we can just sync meta leader once for one query.

Issue Links

• links to: GitHub Pull Request #2778