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Bulk API
editBulk API
editPerforms multiple indexing or delete operations in a single API call. This reduces overhead and can greatly increase indexing speed.
POST _bulk { "index" : { "_index" : "test", "_id" : "1" } } { "field1" : "value1" } { "delete" : { "_index" : "test", "_id" : "2" } } { "create" : { "_index" : "test", "_id" : "3" } } { "field1" : "value3" } { "update" : {"_id" : "1", "_index" : "test"} } { "doc" : {"field2" : "value2"} }
Description
editProvides a way to perform multiple index
, create
, delete
, and update
actions in a single request.
The actions are specified in the request body using a newline delimited JSON (NDJSON) structure:
action_and_meta_data\n optional_source\n action_and_meta_data\n optional_source\n .... action_and_meta_data\n optional_source\n
The index
and create
actions expect a source on the next line,
and have the same semantics as the op_type
parameter in the standard index API:
create fails if a document with the same name already exists in the index,
index adds or replaces a document as necessary.
update
expects that the partial doc, upsert,
and script and its options are specified on the next line.
delete
does not expect a source on the next line and
has the same semantics as the standard delete API.
The final line of data must end with a newline character \n
.
Each newline character may be preceded by a carriage return \r
.
When sending requests to the _bulk
endpoint,
the Content-Type
header should be set to application/x-ndjson
.
Because this format uses literal \n
's as delimiters,
make sure that the JSON actions and sources are not pretty printed.
If you specify an index in the request URI, it is used for any actions that don’t explicitly specify an index.
A note on the format: The idea here is to make processing of this as
fast as possible. As some of the actions are redirected to other
shards on other nodes, only action_meta_data
is parsed on the
receiving node side.
Client libraries using this protocol should try and strive to do something similar on the client side, and reduce buffering as much as possible.
There is no "correct" number of actions to perform in a single bulk request. Experiment with different settings to find the optimal size for your particular workload.
When using the HTTP API, make sure that the client does not send HTTP chunks, as this will slow things down.
Client support for bulk requests
editSome of the officially supported clients provide helpers to assist with bulk requests and reindexing of documents from one index to another:
- Go
- See esutil.BulkIndexer
- Perl
- See Search::Elasticsearch::Client::5_0::Bulk and Search::Elasticsearch::Client::5_0::Scroll
- Python
- See elasticsearch.helpers.*
- JavaScript
- See client.helpers.*
- .NET
-
See
BulkAllObservable
Submitting bulk requests with cURL
editIf you’re providing text file input to curl
, you must use the
--data-binary
flag instead of plain -d
. The latter doesn’t preserve
newlines. Example:
$ cat requests { "index" : { "_index" : "test", "_id" : "1" } } { "field1" : "value1" } $ curl -s -H "Content-Type: application/x-ndjson" -XPOST localhost:9200/_bulk --data-binary "@requests"; echo {"took":7, "errors": false, "items":[{"index":{"_index":"test","_type":"_doc","_id":"1","_version":1,"result":"created","forced_refresh":false}}]}
Optimistic Concurrency Control
editEach index
and delete
action within a bulk API call may include the
if_seq_no
and if_primary_term
parameters in their respective action
and meta data lines. The if_seq_no
and if_primary_term
parameters control
how operations are executed, based on the last modification to existing
documents. See Optimistic concurrency control for more details.
Versioning
editEach bulk item can include the version value using the
version
field. It automatically follows the behavior of the
index / delete operation based on the _version
mapping. It also
support the version_type
(see versioning).
Routing
editEach bulk item can include the routing value using the
routing
field. It automatically follows the behavior of the
index / delete operation based on the _routing
mapping.
Wait For Active Shards
editWhen making bulk calls, you can set the wait_for_active_shards
parameter to require a minimum number of shard copies to be active
before starting to process the bulk request. See
here for further details and a usage
example.
Refresh
editControl when the changes made by this request are visible to search. See refresh.
Only the shards that receive the bulk request will be affected by
refresh
. Imagine a _bulk?refresh=wait_for
request with three
documents in it that happen to be routed to different shards in an index
with five shards. The request will only wait for those three shards to
refresh. The other two shards that make up the index do not
participate in the _bulk
request at all.
Security
editPath parameters
edit-
<index>
- (Optional, string) Name of the index to perform the bulk actions against.
Query parameters
edit-
pipeline
- (Optional, string) ID of the pipeline to use to preprocess incoming documents.
-
refresh
-
(Optional, enum) If
true
, Elasticsearch refreshes the affected shards to make this operation visible to search, ifwait_for
then wait for a refresh to make this operation visible to search, iffalse
do nothing with refreshes. Valid values:true
,false
,wait_for
. Default:false
. -
routing
- (Optional, string) Target the specified primary shard.
-
_source
-
(Optional, string) True or false to return the
_source
field or not, or a list of fields to return. -
_source_excludes
-
(Optional, string) A comma-separated list of source fields to exclude from the response.
You can also use this parameter to exclude fields from the subset specified in
_source_includes
query parameter.If the
_source
parameter isfalse
, this parameter is ignored. -
_source_includes
-
(Optional, string) A comma-separated list of source fields to include in the response.
If this parameter is specified, only these source fields are returned. You can exclude fields from this subset using the
_source_excludes
query parameter.If the
_source
parameter isfalse
, this parameter is ignored. -
master_timeout
-
(Optional, time units) Specifies the period of time to wait for
a connection to the master node. If no response is received before the timeout
expires, the request fails and returns an error. Defaults to
30s
. -
timeout
-
(Optional, time units) Specifies the period of time to wait for
a response. If no response is received before the timeout expires, the request
fails and returns an error. Defaults to
30s
. -
wait_for_active_shards
-
(Optional, string) The number of shard copies that must be active before proceeding with the operation. Set to
all
or any positive integer up to the total number of shards in the index (number_of_replicas+1
). Default: 1, the primary shard.See Active shards.
Request body
editThe request body contains a newline-delimited list of create
, delete
, index
,
and update
actions and their associated source data.
-
create
-
(Optional, string) Indexes the specified document if it does not already exist. The following line must contain the source data to be indexed.
-
_index
- (Optional, string) The name of the target index. Required if not specified as a path parameter.
-
_id
- (Optional, string) The document ID. If no ID is specified, a document ID is automatically generated.
-
-
delete
-
(Optional, string) Removes the specified document from the index.
-
_index
- (Optional, string) The name of the target index. Required if not specified as a path parameter.
-
_id
- (Required, string) The document ID.
-
-
index
-
(Optional, string) Indexes the specified document. If the document exists, replaces the document and increments the version. The following line must contain the source data to be indexed.
-
_index
- (Optional, string) The name of the target index. Required if not specified as a path parameter.
-
_id
- (Optional, string) The document ID. If no ID is specified, a document ID is automatically generated.
-
-
update
-
(Optional, string) Performs a partial document update. The following line must contain the partial document and update options.
-
_index
- (Optional, string) The name of the target index. Required if not specified as a path parameter.
-
_id
- (Required, string) The document ID.
-
-
doc
-
(Optional, object)
The partial document to index.
Required for
update
operations. -
<fields>
-
(Optional, object)
The document source to index.
Required for
create
andindex
operations.
Response body
editThe bulk API’s response contains the individual results of each operation in the request, returned in the order submitted. The success or failure of an individual operation does not affect other operations in the request.
-
took
- (integer) How long, in milliseconds, it took to process the bulk request.
-
errors
-
(boolean)
If
true
, one or more of the operations in the bulk request did not complete successfully. -
items
-
(array of objects) Contains the result of each operation in the bulk request, in the order they were submitted.
Properties of
items
objects- <action>
-
(object) The parameter name is an action associated with the operation. Possible values are
create
,delete
,index
, andupdate
.The parameter value is an object that contains information for the associated operation.
Properties of
<action>
-
_index
- (string) The index name or alias associated with the operation.
-
_type
-
(string)
The document type associated with the operation. Elasticsearch indices now support a
single document type:
_doc
. See Removal of mapping types. -
_id
- (integer) The document ID associated with the operation.
-
_version
-
(integer) The document version associated with the operation. The document version is incremented each time the document is updated.
This parameter is only returned for successful actions.
-
result
-
(string) Result of the operation. Successful values are
created
,deleted
, andupdated
.This parameter is only returned for successful operations.
-
_shards
-
(object) Contains shard information for the operation.
This parameter is only returned for successful operations.
Properties of
_shards
-
total
- (integer) Number of shards the operation attempted to execute on.
-
successful
- (integer) Number of shards the operation succeeded on.
-
failed
- (integer) Number of shards the operation attempted to execute on but failed.
-
-
_seq_no
-
(integer) The sequence number assigned to the document for the operation. Sequence numbers are used to ensure an older version of a document doesn’t overwrite a newer version. See Optimistic concurrency control.
This parameter is only returned for successful operations.
-
_primary_term
-
(integer) The primary term assigned to the document for the operation. See Optimistic concurrency control.
This parameter is only returned for successful operations.
-
status
- (integer) HTTP status code returned for the operation.
-
error
-
(object) Contains additional information about the failed operation.
The parameter is only returned for failed operations.
Properties of
error
-
type
- (string) Error type for the operation.
-
reason
- (string) Reason for the failed operation.
-
index_uuid
- (string) The universally unique identifier (UUID) of the index associated with the failed operation.
-
shard
- (string) ID of the shard associated with the failed operation.
-
index
- (string) The index name or alias associated with the failed operation.
-
-
Examples
editPOST _bulk { "index" : { "_index" : "test", "_id" : "1" } } { "field1" : "value1" } { "delete" : { "_index" : "test", "_id" : "2" } } { "create" : { "_index" : "test", "_id" : "3" } } { "field1" : "value3" } { "update" : {"_id" : "1", "_index" : "test"} } { "doc" : {"field2" : "value2"} }
The API returns the following result:
{ "took": 30, "errors": false, "items": [ { "index": { "_index": "test", "_type": "_doc", "_id": "1", "_version": 1, "result": "created", "_shards": { "total": 2, "successful": 1, "failed": 0 }, "status": 201, "_seq_no" : 0, "_primary_term": 1 } }, { "delete": { "_index": "test", "_type": "_doc", "_id": "2", "_version": 1, "result": "not_found", "_shards": { "total": 2, "successful": 1, "failed": 0 }, "status": 404, "_seq_no" : 1, "_primary_term" : 2 } }, { "create": { "_index": "test", "_type": "_doc", "_id": "3", "_version": 1, "result": "created", "_shards": { "total": 2, "successful": 1, "failed": 0 }, "status": 201, "_seq_no" : 2, "_primary_term" : 3 } }, { "update": { "_index": "test", "_type": "_doc", "_id": "1", "_version": 2, "result": "updated", "_shards": { "total": 2, "successful": 1, "failed": 0 }, "status": 200, "_seq_no" : 3, "_primary_term" : 4 } } ] }
Bulk update example
editWhen using the update
action, retry_on_conflict
can be used as a field in
the action itself (not in the extra payload line), to specify how many
times an update should be retried in the case of a version conflict.
The update
action payload supports the following options: doc
(partial document), upsert
, doc_as_upsert
, script
, params
(for
script), lang
(for script), and _source
. See update documentation for details on
the options. Example with update actions:
POST _bulk { "update" : {"_id" : "1", "_index" : "index1", "retry_on_conflict" : 3} } { "doc" : {"field" : "value"} } { "update" : { "_id" : "0", "_index" : "index1", "retry_on_conflict" : 3} } { "script" : { "source": "ctx._source.counter += params.param1", "lang" : "painless", "params" : {"param1" : 1}}, "upsert" : {"counter" : 1}} { "update" : {"_id" : "2", "_index" : "index1", "retry_on_conflict" : 3} } { "doc" : {"field" : "value"}, "doc_as_upsert" : true } { "update" : {"_id" : "3", "_index" : "index1", "_source" : true} } { "doc" : {"field" : "value"} } { "update" : {"_id" : "4", "_index" : "index1"} } { "doc" : {"field" : "value"}, "_source": true}
Example with failed actions
editThe following bulk API request includes operations that update non-existent documents.
POST /_bulk { "update": {"_id": "5", "_index": "index1"} } { "doc": {"my_field": "foo"} } { "update": {"_id": "6", "_index": "index1"} } { "doc": {"my_field": "foo"} } { "create": {"_id": "7", "_index": "index1"} } { "my_field": "foo" }
Because these operations cannot complete successfully, the API returns a
response with an errors
flag of true
.
The response also includes an error
object for any failed operations. The
error
object contains additional information about the failure, such as the
error type and reason.
{ "took": 486, "errors": true, "items": [ { "update": { "_index": "index1", "_type" : "_doc", "_id": "5", "status": 404, "error": { "type": "document_missing_exception", "reason": "[_doc][5]: document missing", "index_uuid": "aAsFqTI0Tc2W0LCWgPNrOA", "shard": "0", "index": "index1" } } }, { "update": { "_index": "index1", "_type" : "_doc", "_id": "6", "status": 404, "error": { "type": "document_missing_exception", "reason": "[_doc][6]: document missing", "index_uuid": "aAsFqTI0Tc2W0LCWgPNrOA", "shard": "0", "index": "index1" } } }, { "create": { "_index": "index1", "_type" : "_doc", "_id": "7", "_version": 1, "result": "created", "_shards": { "total": 2, "successful": 1, "failed": 0 }, "_seq_no": 0, "_primary_term": 1, "status": 201 } } ] }
To return only information about failed operations, use the
filter_path
query parameter with an
argument of items.*.error
.
POST /_bulk?filter_path=items.*.error { "update": {"_id": "5", "_index": "index1"} } { "doc": {"my_field": "baz"} } { "update": {"_id": "6", "_index": "index1"} } { "doc": {"my_field": "baz"} } { "update": {"_id": "7", "_index": "index1"} } { "doc": {"my_field": "baz"} }
The API returns the following result.
{ "items": [ { "update": { "error": { "type": "document_missing_exception", "reason": "[_doc][5]: document missing", "index_uuid": "aAsFqTI0Tc2W0LCWgPNrOA", "shard": "0", "index": "index1" } } }, { "update": { "error": { "type": "document_missing_exception", "reason": "[_doc][6]: document missing", "index_uuid": "aAsFqTI0Tc2W0LCWgPNrOA", "shard": "0", "index": "index1" } } } ] }
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