[YARN-3862] Support for fetching specific configs and metrics based on prefixes

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: YARN-2928
• Fix Version/s: 2.9.0, 3.0.0-alpha1
• Component/s: timelineserver
• Labels: yarn-2928-1st-milestone
• Target Version/s: YARN-2928
• Hadoop Flags: Reviewed
• Assignee: Varun Saxena
• Reporter: Varun Saxena
• Created: 29/Jun/15 10:27
• Updated: 21/Oct/17 06:06
• Resolved: 02/Dec/15 05:50

Description

Currently, we will retrieve all the contents of the field if that field is specified in the query API. In case of configs and metrics, this can become a lot of data even though the user doesn't need it. So we need to provide a way to query only a set of configs or metrics.

As a comma spearated list of configs/metrics to be returned will be quite cumbersome to specify, we have to support either of the following options :

1. Prefix match
2. Regex
3. Group the configs/metrics and query that group.

We also need a facility to specify a metric time window to return metrics in a that window. This may be useful in plotting graphs

Issue Links

• is related to: YARN-3051 [Storage abstraction] Create backing storage read interface for ATS readers
• relates to: YARN-4447 Provide a mechanism to represent complex filters and parse them at the REST layer