hujiahua created KYLIN-5155:
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Summary: Change volatile range default value
Key: KYLIN-5155
URL: https://issues.apache.org/jira/browse/KYLIN-5155
Project: Kylin
Issue Type: Improvement
Components: Job Engine
Affects Versions: v4.0.1
Reporter: hujiahua
Since the current default value of `Volatile Range` is 0, when segment merge
job is triggered, this new segment which generated today may also be merged.
This brings up two issue: 1. Rebuid cube job triggered by scheduling system
(e.g. apache airflow) with kylin rest API will failed because of using today
startTime and endTime. 2. The segment of today was hot data (visited
frequently), so query RT may get worse after merged. So I proposal not to merge
last 7 days data by default.
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