[Backport 2.13] Add note about Data Prepper versus ingest processors

_ingest-pipelines/processors/append.md

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    - /api-reference/ingest-apis/processors/append/
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-
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+This documentation describes using the `append` processor in OpenSearch ingest pipelines. Consider using the [Data Prepper `add_entries` processor]({{site.url}}{{site.baseurl}}/data-prepper/pipelines/configuration/processors/add-entries/), which runs on the OpenSearch cluster, if your use case involves large or complex datasets.
+{: .note}
+
 # Append processor
 
 The `append` processor is used to add values to a field:
+
 - If the field is an array, the `append` processor appends the specified values to that array.
 - If the field is a scalar field, the `append` processor converts it to an array and appends the specified values to that array.
 - If the field does not exist, the `append` processor creates an array with the specified values.

_ingest-pipelines/processors/convert.md

@@ -7,6 +7,9 @@ redirect_from:
    - /api-reference/ingest-apis/processors/convert/
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+This documentation describes using the `convert` processor in OpenSearch ingest pipelines. Consider using the [Data Prepper `convert_entry_type` processor]({{site.url}}{{site.baseurl}}/data-prepper/pipelines/configuration/processors/convert_entry_type/), which runs on the OpenSearch cluster, if your use case involves large or complex datasets.
+{: .note}
+
 # Convert processor
 
 The `convert` processor converts a field in a document to a different type, for example, a string to an integer or an integer to a string. For an array field, all values in the array are converted. 

_ingest-pipelines/processors/copy.md

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    - /api-reference/ingest-apis/processors/copy/
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+This documentation describes using the `copy` processor in OpenSearch ingest pipelines. Consider using the [Data Prepper `copy_values` processor]({{site.url}}{{site.baseurl}}/data-prepper/pipelines/configuration/processors/copy-values/), which runs on the OpenSearch cluster, if your use case involves large or complex datasets.
+{: .note}
+
 # Copy processor
 
 The `copy` processor copies an entire object in an existing field to another field.

_ingest-pipelines/processors/csv.md

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    - /api-reference/ingest-apis/processors/csv/
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+This documentation describes using the `csv` processor in OpenSearch ingest pipelines. Consider using the [Data Prepper `csv` processor]({{site.url}}{{site.baseurl}}/data-prepper/pipelines/configuration/processors/csv/), which runs on the OpenSearch cluster, if your use case involves large or complex datasets.
+{: .note}
+
 # CSV processor
 
 The `csv` processor is used to parse CSVs and store them as individual fields in a document. The processor ignores empty fields. 

_ingest-pipelines/processors/date.md

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    - /api-reference/ingest-apis/processors/date/
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+This documentation describes using the `date` processor in OpenSearch ingest pipelines. Consider using the [Data Prepper `date` processor]({{site.url}}{{site.baseurl}}/data-prepper/pipelines/configuration/processors/date/), which runs on the OpenSearch cluster, if your use case involves large or complex datasets.
+{: .note}
+
 # Date processor
 
 The `date` processor is used to parse dates from document fields and to add the parsed data to a new field. By default, the parsed data is stored in the `@timestamp` field. 

_ingest-pipelines/processors/dissect.md

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+This documentation describes using the `dissect` processor in OpenSearch ingest pipelines. Consider using the [Data Prepper `dissect` processor]({{site.url}}{{site.baseurl}}/data-prepper/pipelines/configuration/processors/dissect/), which runs on the OpenSearch cluster, if your use case involves large or complex datasets.
+{: .note}
+
 # Dissect
 
 The `dissect` processor extracts values from a document text field and maps them to individual fields based on dissect patterns. The processor is well suited for field extractions from log messages with a known structure. Unlike the `grok` processor, `dissect` does not use regular expressions and has a simpler syntax.

_ingest-pipelines/processors/drop.md

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+This documentation describes using the `drop` processor in OpenSearch ingest pipelines. Consider using the [Data Prepper `drop_events` processor]({{site.url}}{{site.baseurl}}/data-prepper/pipelines/configuration/processors/drop-events/), which runs on the OpenSearch cluster, if your use case involves large or complex datasets.
+{: .note}
+
 # Drop processor
 
 The `drop` processor is used to discard documents without indexing them. This can be useful for preventing documents from being indexed based on certain conditions. For example, you might use a `drop` processor to prevent documents that are missing important fields or contain sensitive information from being indexed. 

_ingest-pipelines/processors/grok.md

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+This documentation describes using the `grok` processor in OpenSearch ingest pipelines. Consider using the [Data Prepper `grok` processor]({{site.url}}{{site.baseurl}}/data-prepper/pipelines/configuration/processors/grok/), which runs on the OpenSearch cluster, if your use case involves large or complex datasets.
+{: .note}
+
 # Grok processor 
 
 The `grok` processor is used to parse and structure unstructured data using pattern matching. You can use the `grok` processor to extract fields from log messages, web server access logs, application logs, and other log data that follows a consistent format.

_ingest-pipelines/processors/kv.md

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    - /api-reference/ingest-apis/processors/lowercase/
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+This documentation describes using the `kv` processor in OpenSearch ingest pipelines. Consider using the [Data Prepper `key_value` processor]({{site.url}}{{site.baseurl}}/data-prepper/pipelines/configuration/processors/key-value/), which runs on the OpenSearch cluster, if your use case involves large or complex datasets.
+{: .note}
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 # KV processor
 
 The `kv` processor automatically extracts specific event fields or messages that are in a `key=value` format. This structured format organizes your data by grouping it together based on keys and values. It's helpful for analyzing, visualizing, and using data, such as user behavior analytics, performance optimizations, or security investigations. 

_ingest-pipelines/processors/lowercase.md

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    - /api-reference/ingest-apis/processors/lowercase/
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+This documentation describes using the `lowercase` processor in OpenSearch ingest pipelines. Consider using the [Data Prepper `lowercase_string` processor]({{site.url}}{{site.baseurl}}/data-prepper/pipelines/configuration/processors/lowercase-string/), which runs on the OpenSearch cluster, if your use case involves large or complex datasets.
+{: .note}
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 # Lowercase processor
 
 The `lowercase` processor converts all the text in a specific field to lowercase letters. 

_ingest-pipelines/processors/uppercase.md

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+This documentation describes using the `uppercase` processor in OpenSearch ingest pipelines. Consider using the [Data Prepper `uppercase_string` processor]({{site.url}}{{site.baseurl}}/data-prepper/pipelines/configuration/processors/uppercase-string/), which runs on the OpenSearch cluster, if your use case involves large or complex datasets.
+{: .note}
+
 # Uppercase processor
 
 The `uppercase` processor converts all the text in a specific field to uppercase letters.