Add common operations section to User Guide.

Signed-off-by: Archer <[email protected]>

_benchmark/user-guide/understanding-workloads/choosing-a-workload.md

@@ -18,7 +18,7 @@ Consider the following criteria when deciding which workload would work best for
 
 - The cluster's use case. 
 - The data types that your cluster uses compared to the data structure of the documents contained in the workload. Each workload contains an example document so that you can compare data types, or you can view the index mappings and data types in the `index.json` file.
-- The query types most commonly used inside your cluster. The `operations/default.json` file contains information about the query types and workload operations. 
+- The query types most commonly used inside your cluster. The `operations/default.json` file contains information about the query types and workload operations. For a list of common operations, see [Common operations]({{site.url}}{{site.baseurl}}/benchmark/user-guide/understanding-workloads/common-operations/).
 
 ## General search clusters
 

_benchmark/user-guide/understanding-workloads/common-operations.md

@@ -0,0 +1,181 @@
+---
+layout: default
+title: Common operations
+nav_order: 16
+grand_parent: User guide
+parent: Understanding workloads
+---
+
+# Common operations
+
+[Test procedures]({{site.url}}{{site.baseurl}}/benchmark/user-guide/understanding-workloads/anatomy-of-a-workload#operations-and-_test-procedures) use a variety of operations, found inside the `operations` directory of a workload. This page details the most common operations found inside Benchmark workloads.
+
+- [Common operations](#common-operations)
+  - [bulk](#bulk)
+  - [create-index](#create-index)
+  - [delete-index](#delete-index)
+  - [cluster-health](#cluster-health)
+  - [refresh](#refresh)
+  - [search](#search)
+
+<!-- vale off -->
+## bulk
+<!-- vale on -->
+
+The `bulk` operation type allows you to run [bulk](/api-reference/document-apis/bulk/) requests as a task. 
+
+The following example shows a `bulk` operation type with a `bulk-size` of `5000` documents:
+
+```yml
+{
+  "name": "index-append",
+  "operation-type": "bulk",
+  "bulk-size": 5000
+}
+```
+
+
+<!-- vale off -->
+## create-index
+<!-- vale on -->
+
+The `create-index` operation runs the [Create Index API](/api-reference/index-apis/create-index/). It supports the following two modes of index creation:
+
+- Creating all indexes specified in the workloads `indices` section
+- Creating one specific index defined within the operation itself
+
+The following example creates all indexes defined in the `indices` section of the workload. It uses all of the index settings defined in the workload but overrides the number of shards:
+
+```yml
+{
+  "name": "create-all-indices",
+  "operation-type": "create-index",
+  "settings": {
+    "index.number_of_shards": 1
+  },
+  "request-params": {
+    "wait_for_active_shards": "true"
+  }
+}
+```
+
+The following example creates a new index with all index settings specified in the operation body:
+
+```yml
+{
+  "name": "create-an-index",
+  "operation-type": "create-index",
+  "index": "people",
+  "body": {
+    "settings": {
+      "index.number_of_shards": 0
+    },
+    "mappings": {
+      "docs": {
+        "properties": {
+          "name": {
+            "type": "text"
+          }
+        }
+      }
+    }
+  }
+}
+```
+
+
+
+<!-- vale off -->
+## delete-index
+<!-- vale on -->
+
+The `delete-index` operation runs the [Delete Index API](api-reference/index-apis/delete-index/). Like with the [`create-index`](#create-index) operation, you can delete all indexes found in the `indices` section of the workload or delete one or more indexes based on the string passed in the `index` setting.
+
+The following example deletes all indexes found in the `indices` section of the workload:
+
+```yml
+{
+  "name": "delete-all-indices",
+  "operation-type": "delete-index"
+}
+```
+
+The following example deletes all `logs_*` indexes:
+
+```yml
+{
+  "name": "delete-logs",
+  "operation-type": "delete-index",
+  "index": "logs-*",
+  "only-if-exists": false,
+  "request-params": {
+    "expand_wildcards": "all",
+    "allow_no_indices": "true",
+    "ignore_unavailable": "true"
+  }
+}
+```
+
+<!-- vale off -->
+## cluster-health
+<!-- vale on -->
+
+The `cluster-health` operation runs the [Cluster Health API](api-reference/cluster-api/cluster-health/), which checks the cluster health status and returns the expected status according to the parameters set for `request-params`. If an unexpected cluster health status is returned, the operation reports a failure. You can use the `--on-error` option in the OpenSearch Benchmark `execute-test` command to control how OpenSearch Benchmark behaves when the health check fails.
+
+The following example creates a `cluster-health` operation that checks for a `green` health status on any `log-*` indexes:
+
+```yml
+{
+  "name": "check-cluster-green",
+  "operation-type": "cluster-health",
+  "index": "logs-*",
+  "request-params": {
+    "wait_for_status": "green",
+    "wait_for_no_relocating_shards": "true"
+  },
+  "retry-until-success": true
+}
+
+```
+
+<!-- vale off -->
+## refresh
+<!-- vale on -->
+
+The `refresh` operation runs the Refresh API. The `operation` returns no metadata.
+
+
+The following example refreshes all `logs-*` indexes:
+
+```yml
+{
+ "name": "refresh",
+ "operation-type": "refresh",
+ "index": "logs-*"
+}
+```
+
+
+<!-- vale off -->
+## search
+<!-- vale on -->
+
+The `search` operation runs the [Search API](/api-reference/search/), which you can use to run queries in OpenSearch Benchmark indexes.
+
+The following example runs a `match_all` query inside the `search` operation:
+
+```yml
+{
+  "name": "default",
+  "operation-type": "search",
+  "body": {
+    "query": {
+      "match_all": {}
+    }
+  },
+  "request-params": {
+    "_source_include": "some_field",
+    "analyze_wildcard": "false"
+  }
+}
+```