44Frequently Asked Questions
55==========================
66
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79.. default-domain:: mongodb
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11+ .. contents:: On this page
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916
1017This page provides answers to some frequently asked questions we have
1118encountered. If you have additional questions please contact MongoDB
1219Support.
1320
1421Does ``mongosync`` have to use the same operating system as MongoDB Enterprise Server?
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1623
1724When ``mongosync`` runs on its own hardware, it does not have to use
1825the same operation system (OS) as the source or destination clusters it
@@ -21,7 +28,7 @@ is connecting.
2128.. _c2c-faq-increase-oplog:
2229
2330Should I increase the size of the oplog in the source cluster?
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2532
2633If you anticipate synchronizing a large data set, or if you plan to
2734pause synchronization for an extended period of time, increase the size
@@ -44,7 +51,7 @@ To learn more about how to increase the size of the ``oplog``, see:
4451:ref:`tutorial-change-oplog-size`.
4552
4653Which connection string options does ``mongosync`` allow?
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4855
4956``mongosync`` requires :ref:`readConcern: "majority" <read-concern>`
5057and :ref:`writeConcern: "majority" <write-concern>`. ``mongosync``
@@ -56,7 +63,7 @@ overwrites any other ``readConcern`` or ``writeConcern`` and uses
5663
5764
5865Which security and authentication options are supported?
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6067
6168``mongosync`` uses a standard MongoDB :ref:`connection string
6269<mongodb-uri>` to connect to the source and destination clusters.
@@ -67,7 +74,7 @@ authentication options, see :ref:`authentication`.
6774
6875
6976Can I configure ``mongosync`` for high availability?
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7178
7279There is no automatic failover built into ``mongosync``. However you
7380can write a script or use your operating system's process managers,
@@ -83,7 +90,7 @@ parameters. ``mongosync`` resumes the operation from where it stopped
8390when ``mongosync`` became unavailable.
8491
8592Can the source or destination be a replica set with arbiters?
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8794
8895Yes, the replica set can have arbiters. The source replica set must
8996have more than 2 non-arbiter nodes and you must sync from a non-arbiter
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