- Elasticsearch Guide: other versions:
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- Tutorial: Getting started with security
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- Definitions
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- Elasticsearch version 6.5.4
- Elasticsearch version 6.5.3
- Elasticsearch version 6.5.2
- Elasticsearch version 6.5.1
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- Elasticsearch version 6.0.0-alpha1
- Elasticsearch version 6.0.0-alpha1 (Changes previously released in 5.x)
Get rollup job capabilities API
editGet rollup job capabilities API
editThis functionality is in technical preview and may be changed or removed in a future release. Elastic will work to fix any issues, but features in technical preview are not subject to the support SLA of official GA features.
This API returns the capabilities of any rollup jobs that have been configured for a specific index or index pattern.
This API is useful because a rollup job is often configured to rollup only a subset of fields from the source index. Furthermore, only certain aggregations can be configured for various fields, leading to a limited subset of functionality depending on that configuration.
This API enables you to inspect an index and determine:
- Does this index have associated rollup data somewhere in the cluster?
- If yes to the first question, what fields were rolled up, what aggregations can be performed, and where does the data live?
Request
editGET _xpack/rollup/data/{index}
Path Parameters
edit-
index
-
(string) Index, indices or index-pattern to return rollup capabilities for.
_all
may be used to fetch rollup capabilities from all jobs
Request Body
editThere is no request body for the Get Rollup Caps API.
Authorization
editYou must have monitor
, monitor_rollup
, manage
or manage_rollup
cluster privileges to use this API.
For more information, see
Security privileges.
Examples
editImagine we have an index named sensor-1
full of raw data. We know that the data will grow over time, so there
will be a sensor-2
, sensor-3
, etc. Let’s create a Rollup job that targets the index pattern sensor-*
to accommodate
this future scaling:
PUT _xpack/rollup/job/sensor { "index_pattern": "sensor-*", "rollup_index": "sensor_rollup", "cron": "*/30 * * * * ?", "page_size" :1000, "groups" : { "date_histogram": { "field": "timestamp", "interval": "1h", "delay": "7d" }, "terms": { "fields": ["node"] } }, "metrics": [ { "field": "temperature", "metrics": ["min", "max", "sum"] }, { "field": "voltage", "metrics": ["avg"] } ] }
We can then retrieve the rollup capabilities of that index pattern (sensor-*
) via the following command:
GET _xpack/rollup/data/sensor-*
Which will yield the following response:
{ "sensor-*" : { "rollup_jobs" : [ { "job_id" : "sensor", "rollup_index" : "sensor_rollup", "index_pattern" : "sensor-*", "fields" : { "node" : [ { "agg" : "terms" } ], "temperature" : [ { "agg" : "min" }, { "agg" : "max" }, { "agg" : "sum" } ], "timestamp" : [ { "agg" : "date_histogram", "time_zone" : "UTC", "interval" : "1h", "delay": "7d" } ], "voltage" : [ { "agg" : "avg" } ] } } ] } }
The response that is returned contains information that is similar to the original Rollup configuration, but formatted differently. First, there are some house-keeping details: the Rollup job’s ID, the index that holds the rolled data, the index pattern that the job was targeting.
Next it shows a list of fields that contain data eligible for rollup searches. Here we see four fields: node
, temperature
,
timestamp
and voltage
. Each of these fields list the aggregations that are possible. For example, you can use a min, max
or sum aggregation on the temperature
field, but only a date_histogram
on timestamp
.
Note that the rollup_jobs
element is an array; there can be multiple, independent jobs configured for a single index
or index pattern. Each of these jobs may have different configurations, so the API returns a list of all the various
configurations available.
We could also retrieve the same information with a request to _all
:
GET _xpack/rollup/data/_all
But note that if we use the concrete index name (sensor-1
), we’ll retrieve no rollup capabilities:
GET _xpack/rollup/data/sensor-1
{ }
Why is this? The original rollup job was configured against a specific index pattern (sensor-*
) not a concrete index
(sensor-1
). So while the index belongs to the pattern, the rollup job is only valid across the entirety of the pattern
not just one of it’s containing indices. So for that reason, the Rollup Capabilities API only returns information based
on the originally configured index name or pattern.