mirror of https://github.com/apache/druid.git
81 lines
1.9 KiB
Markdown
81 lines
1.9 KiB
Markdown
---
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layout: default
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---
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Note: It is recommended that the master console is used to configure rules. However, the master node does have HTTP endpoints to programmatically configure rules.
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Load Rules
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----------
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Load rules indicate how many replicants of a segment should exist in a server tier.
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### Interval Load Rule
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Interval load rules are of the form:
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<code>
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{
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"type" : "loadByInterval",
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"interval" : "2012-01-01/2013-01-01",
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"tier" : "hot"
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}
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</code>
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type - this should always be “loadByInterval”
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interval - A JSON Object representing ISO-8601 Intervals
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tier - the configured compute node tier
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### Period Load Rule
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Period load rules are of the form:
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<code>
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{
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"type" : "loadByInterval",
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"period" : "P1M",
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"tier" : "hot"
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}
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</code>
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type - this should always be “loadByPeriod”
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period - A JSON Object representing ISO-8601 Periods
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tier - the configured compute node tier
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The interval of a segment will be compared against the specified period. The rule matches if the period overlaps the interval.
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Drop Rules
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----------
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Drop rules indicate when segments should be dropped from the cluster.
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### Interval Drop Rule
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Interval drop rules are of the form:
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<code>
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{
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"type" : "dropByInterval",
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"interval" : "2012-01-01/2013-01-01"
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}
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</code>
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type - this should always be “dropByInterval”
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interval - A JSON Object representing ISO-8601 Periods
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A segment is dropped if the interval contains the interval of the segment.
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### Period Drop Rule
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Period drop rules are of the form:
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<code>
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{
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"type" : "dropByPeriod",
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"period" : "P1M"
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}
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</code>
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type - this should always be “dropByPeriod”
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period - A JSON Object representing ISO-8601 Periods
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The interval of a segment will be compared against the specified period. The period is from some time in the past to the current time. The rule matches if the period contains the interval.
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