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DOCS-1899: Comment on: manual/release-notes/2.4-upgrade.txt #1273

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DOCS-1899: Comment on: manual/release-notes/2.4-upgrade.txt #1273

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5 changes: 5 additions & 0 deletions source/includes/fact-upgrade-sharded-cluster-prereq.rst
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Expand Up @@ -9,3 +9,8 @@ Additionally, ensure that all indexes in the :doc:`config database
index is a ``{v:0}`` index, chunk splits can fail due to known issues
with the ``{v:0}`` format. ``{v:0}`` indexes are present on clusters created with
MongoDB 2.0 or earlier.

The duration of the metadata upgrade depends on the network latency
between the node performing the upgrade and the three config servers.
Ensure low latency between the upgrade process and the config servers.