mongodb · jeff-allen-mongo · Nov 9, 2021 · Nov 2, 2021 · Nov 5, 2021 · Nov 8, 2021
diff --git a/source/core/timeseries-collections.txt b/source/core/timeseries-collections.txt
@@ -79,6 +79,8 @@ command:
        }
    )
 
+.. _time-series-fields:
+
 When creating a time series collection, specify the following options:
 
 .. list-table::

diff --git a/source/core/timeseries/timeseries-granularity.txt b/source/core/timeseries/timeseries-granularity.txt
@@ -143,3 +143,8 @@ a time. From ``"seconds"`` to ``"minutes"`` or from ``"minutes"`` to
 ``"hours"``. Other changes are not allowed. If you need to change the
 ``granularity`` from ``"seconds"`` to ``"hours"``, first increase the
 ``granularity`` to ``"minutes"`` and then to ``"hours"``.
+
+.. note::
+
+   You cannot modify the ``granularity`` of a sharded time series
+   collection.
diff --git a/source/core/timeseries/timeseries-limitations.txt b/source/core/timeseries/timeseries-limitations.txt
@@ -24,9 +24,18 @@ The maximum size of a measurement document is 4 MB.
 Updates and Deletes
 ~~~~~~~~~~~~~~~~~~~
 
-:ref:`Time series collections <manual-timeseries-collection>` only
-support insert operations and read queries. Updates and manual delete operations
-result in an error.
+:ref:`Time series collections <manual-timeseries-collection>` support update
+and delete operations with limitations. The following operations are not supported
+on time series collections:
+
+- :dbcommand:`findAndModify`.
+- Updates that modify the ``timeField``.
+- Updates with ``multi:false`` that modify the ``metaField``.
+- Updates with ``upsert:true``.
+- Updates or deletes in multi-document transactions.
+
+MongoDB supports all other update and delete operations. For more information, 
+see :ref:`<collection-method>`.
 
 To automatically delete old data, :ref:`set up automatic removal (TTL)
 <set-up-automatic-removal>`.
@@ -117,11 +126,14 @@ Client-Side Field Level Encryption
 </core/security-client-side-encryption>` is not supported for
 :ref:`time series collections <manual-timeseries-collection>`.
 
+.. _time-series-limitations-sharding:
+
 Sharding
 ~~~~~~~~
 
-:ref:`Time series collections <manual-timeseries-collection>` cannot
-currently be sharded.
+Starting in MongoDB 5.1, sharded time series collections are supported.
+
+You cannot modify the ``granularity`` of a sharded time series collection.
 
 Aggregation $out and $merge
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~

diff --git a/source/includes/5.1/5.1-release-notes-sharded-time-series.rst b/source/includes/5.1/5.1-release-notes-sharded-time-series.rst
@@ -0,0 +1,3 @@
+MongoDB 5.1 provides support for sharded :ref:`time series collections
+<manual-timeseries-collection>`. See :ref:`Time Series Limitations
+<time-series-limitations-sharding>`.
diff --git a/source/reference/command/findAndModify.txt b/source/reference/command/findAndModify.txt
@@ -1,3 +1,5 @@
+.. _find-and-modify:
+
 =============
 findAndModify
 =============

diff --git a/source/reference/method/db.collection.update.txt b/source/reference/method/db.collection.update.txt
@@ -1,3 +1,5 @@
+.. _collection-update:
+
 ======================
 db.collection.update()
 ======================
@@ -51,6 +53,8 @@ The :method:`db.collection.update()` method has the following form:
       }
    )
 
+.. _update-parameters:
+
 Parameters
 ~~~~~~~~~~
 

diff --git a/source/reference/method/js-collection.txt b/source/reference/method/js-collection.txt
@@ -1,3 +1,5 @@
+.. _collection-method:
+
 ==================
 Collection Methods
 ==================

diff --git a/source/release-notes/5.1.txt b/source/release-notes/5.1.txt
@@ -59,6 +59,28 @@ Starting in MongoDB 5.1, :expression:`$dateSubtract` and
 :expression:`$dateAdd` report an error when an overflow is detected for
 ``amount`` values.
 
+Time Series Collections
+-----------------------
+
+Geo Indexing for Time Series collections
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Starting in MongoDB 5.1, you can use :ref:`geo indexes
+<timeseries-limitations-secondary-indexes>` on the ``metaField`` of time
+series collections.
+
+Updates and Deletes
+~~~~~~~~~~~~~~~~~~~
+
+Starting in MongoDB 5.1, time series collections support 
+:ref:`update and delete operations <updates-and-deletes>` with
+limitations.
+
+Sharded Time Series Collections
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. include:: /includes/5.1/5.1-release-notes-sharded-time-series.rst
+
 .. _5.1-rel-notes-sbe:
 
 Slot-Based Query Execution Engine
@@ -135,13 +157,6 @@ Opcode Counters
 Resharding Statistics
   - :serverstatus:`shardingStatistics.resharding.lastOpEndingChunkImbalance`
 
-Geo Indexing for Time Series collections
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-Starting in MongoDB 5.1, you can use :ref:`geo indexes
-<timeseries-limitations-secondary-indexes>` on the ``metaField`` of time
-series collections.
-
 Schema Validation Errors Contain Description Field
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-Original file line number
+Diff line change
@@ Expand Up / @@ -79,6 +79,8 @@ command: @@
            }
        )
+    .. _time-series-fields:
     When creating a time series collection, specify the following options:
     .. list-table::
@@ Expand Down @@