From 54126629a6102010587777615e5686ce998ff61c Mon Sep 17 00:00:00 2001 From: Xiubo Li Date: Thu, 21 Apr 2022 09:35:58 +0800 Subject: [PATCH] doc: cephfs: update with atime not supporting explaination Signed-off-by: Xiubo Li --- doc/cephfs/posix.rst | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/doc/cephfs/posix.rst b/doc/cephfs/posix.rst index a2c9c2017c72b..86f930916d540 100644 --- a/doc/cephfs/posix.rst +++ b/doc/cephfs/posix.rst @@ -40,6 +40,11 @@ POSIX semantics for various reasons: code. The name of this hidden directory can be changed at mount time with ``-o snapdirname=.somethingelse`` (Linux) or the config option ``client_snapdir`` (libcephfs, ceph-fuse). +- CephFS does not currently maintain the ``atime`` field. Most applications + do not care, though this impacts some backup and data tiering + applications that can move unused data to a secondary storage system. + You may be able to workaround this for some use cases, as CephFS does + support setting ``atime`` via the ``setattr`` operation. Perspective ----------- -- 2.39.5