[KYLIN-4137] Accelerate metadata reloading

• Type: Improvement
• Status: Reopened
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: v2.6.2
• Fix Version/s: v3.0.0-beta
• Component/s: Metadata
• Assignee: Temple Zhou
• Reporter: Temple Zhou
• Created: 14/Aug/19 02:06
• Updated: 05/Feb/20 08:09

Description

Now, org.apache.kylin.metadata.cachesync.CachedCrudAssist#reloadAll is using an inappropriate method to deal with MySQLJdbcMetadata.

As the every call of reloadAt(path) will access the database, which is almost fine to HBase but really unfriendly to the MySQL(RDBMS).

I think we should get all of the resource with single request instead of the separate request to get every resource.

Issue Links

• is caused by: KYLIN-2717 Move concept Table under Project
• links to: GitHub Pull Request #802