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DOCS-386 add glossary for "sync" #526

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DOCS-386 add glossary for "sync" #526

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2 changes: 1 addition & 1 deletion source/core/replication-internals.txt
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Expand Up @@ -256,7 +256,7 @@ Syncing
-------

In order to remain up-to-date with the current state of the :term:`replica set`,
set members sync, or copy, :term:`oplog` entries from other members.
set members :term:`sync`, or copy, :term:`oplog` entries from other members.

When a new member joins a set or an existing member restarts, the
member waits to receive heartbeats from other members. By
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8 changes: 8 additions & 0 deletions source/reference/glossary.txt
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Expand Up @@ -911,3 +911,11 @@ Glossary

dot notation
.. include:: /includes/fact-dot-notation.rst

sync
The :term:`replica set` operation that replicates data from the
:term:`primary` to the other members of the set that hold data.
Replication uses two types of sync: "initial sync," in which one
member clones the data from another member, and "oplog sync," in
which one member copies the oplog entries from another member and
then applies them.