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Merge pull request #15550 from jcsp/wip-doc-cephfs-objsize

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doc/cephfs: mention RADOS object size limit

Reviewed-by: Josh Durgin <jdurgin@redhat.com>
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Josh Durgin 2017-06-09 14:22:56 -07:00 committed by GitHub
commit 7376e8132f
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doc/cephfs/file-layouts.rst
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@ -34,6 +34,14 @@ stripe_count
object_size
Integer in bytes. File data is chunked into RADOS objects of this size.
.. tip::
RADOS enforces a configurable limit on object sizes: if you increase CephFS
object sizes beyond that limit then writes may not succeed. The OSD
setting is ``rados_max_object_size``, which is 128MB by default.
Very large RADOS objects may prevent smooth operation of the cluster,
so increasing the object size limit past the default is not recommended.
Reading layouts with ``getfattr``
---------------------------------