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Elastic Docs ›Elasticsearch Guide [7.12] ›REST APIs ›Compact and aligned text (CAT) APIs

cat transforms API

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cat transforms API

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Returns configuration and usage information about transforms.

Request

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GET /_cat/transforms/<transform_id>

GET /_cat/transforms/_all

GET /_cat/transforms/*

GET /_cat/transforms

Prerequisites

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  • If the Elasticsearch security features are enabled, you must have monitor_transform cluster privileges to use this API. The built-in transform_user role has these privileges. For more information, see Security privileges and Built-in roles.

Path parameters

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<transform_id>
(Optional, string) Identifier for the transform. It can be a transform identifier or a wildcard expression. If you do not specify one of these options, the API returns information for all transforms.

Query parameters

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allow_no_match

(Optional, Boolean) Specifies what to do when the request:

  • Contains wildcard expressions and there are no transforms that match.
  • Contains the _all string or no identifiers and there are no matches.
  • Contains wildcard expressions and there are only partial matches.

The default value is true, which returns an empty transforms array when there are no matches and the subset of results when there are partial matches.

If this parameter is false, the request returns a 404 status code when there are no matches or only partial matches.

format
(Optional, string) Short version of the HTTP accept header. Valid values include JSON, YAML, etc.
from
(Optional, integer) Skips the specified number of transforms. The default value is 0.
h

(Optional, string) Comma-separated list of column names to display.

If you do not specify which columns to include, the API returns the default columns. If you explicitly specify one or more columns, it returns only the specified columns.

Valid columns are:

changes_last_detection_time, cldt
(Default) The timestamp when changes were last detected in the source indices.
checkpoint, cp
(Default) The sequence number for the checkpoint.
checkpoint_duration_time_exp_avg, cdtea, checkpointTimeExpAvg
Exponential moving average of the duration of the checkpoint, in milliseconds.
checkpoint_progress, c, checkpointProgress
(Default) The progress of the next checkpoint that is currently in progress.
create_time, ct, createTime
The time the transform was created.
delete_time, dtime
The amount of time spent deleting, in milliseconds.
description, d
The description of the transform.
dest_index, di, destIndex
The destination index for the transform. The mappings of the destination index are deduced based on the source fields when possible. If alternate mappings are required, use the Create index API prior to starting the transform.
documents_deleted, docd
The number of documents that have been deleted from the destination index due to the retention policy for this transform.
documents_indexed, doci
The number of documents that have been indexed into the destination index for the transform.
docs_per_second, dps
Specifies a limit on the number of input documents per second. This setting throttles the transform by adding a wait time between search requests. The default value is null, which disables throttling.
documents_processed, docp
(Default) The number of documents that have been processed from the source index of the transform.
frequency, f
The interval between checks for changes in the source indices when the transform is running continuously. Also determines the retry interval in the event of transient failures while the transform is searching or indexing. The minimum value is 1s and the maximum is 1h. The default value is 1m.
id
(Default) Identifier for the transform. This identifier can contain lowercase alphanumeric characters (a-z and 0-9), hyphens, and underscores. It must start and end with alphanumeric characters.
index_failure, if
The number of indexing failures.
index_time, itime
The amount of time spent indexing, in milliseconds.
index_total, it
The number of indices created.
indexed_documents_exp_avg, idea
Exponential moving average of the number of new documents that have been indexed.
last_search_time, lst, lastSearchTime
(Default) The timestamp of the last search in the source indices. This field is only shown if the transform is running.
max_page_search_size, mpsz
Defines the initial page size to use for the composite aggregation for each checkpoint. If circuit breaker exceptions occur, the page size is dynamically adjusted to a lower value. The minimum value is 10 and the maximum is 10,000. The default value is 500.
pages_processed, pp
The number of search or bulk index operations processed. Documents are processed in batches instead of individually.
pipeline, p
The unique identifier for an ingest pipeline.
processed_documents_exp_avg, pdea
Exponential moving average of the number of documents that have been processed.
processing_time, pt
The amount of time spent processing results, in milliseconds.
reason, r
If a transform has a failed state, this property provides details about the reason for the failure.
search_failure, sf
The number of search failures.
search_time, stime
The amount of time spent searching, in milliseconds.
search_total, st
The number of search operations on the source index for the transform.
source_index, si, sourceIndex
(Default) The source indices for the transform. It can be a single index, an index pattern (for example, "my-index-*"), an array of indices (for example, ["my-index-000001", "my-index-000002"]), or an array of index patterns (for example, ["my-index-*", "my-other-index-*"]. For remote indices use the syntax "remote_name:index_name".

If any indices are in remote clusters then the master node and at least one transform node must have the remote_cluster_client node role.

state, s

(Default) The status of the transform, which can be one of the following values:

  • aborting: The transform is aborting.
  • failed: The transform failed. For more information about the failure, check the reason field.
  • indexing: The transform is actively processing data and creating new documents.
  • started: The transform is running but not actively indexing data.
  • stopped: The transform is stopped.
  • stopping: The transform is stopping.
transform_type, tt
Indicates the type of transform: batch or continuous.
trigger_count, tc
The number of times the transform has been triggered by the scheduler. For example, the scheduler triggers the transform indexer to check for updates or ingest new data at an interval specified in the frequency property.
version, v

The version of Elasticsearch that existed on the node when the transform was created.

help
(Optional, Boolean) If true, the response includes help information. Defaults to false.
s
(Optional, string) Comma-separated list of column names or column aliases used to sort the response.
size
(Optional, integer) Specifies the maximum number of transforms to obtain. The default value is 100.
time
(Optional, time units) Unit used to display time values.
v
(Optional, Boolean) If true, the response includes column headings. Defaults to false.

Examples

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GET /_cat/transforms?v=true&format=json
[
  {
    "id" : "ecommerce_transform",
    "state" : "started",
    "checkpoint" : "1",
    "documents_processed" : "705",
    "checkpoint_progress" : "100.00",
    "changes_last_detection_time" : null
  }
]
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