From: Xiubo Li Date: Thu, 21 Apr 2022 01:35:58 +0000 (+0800) Subject: doc: cephfs: update with atime not supporting explaination X-Git-Tag: v18.0.0~1029^2 X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=refs%2Fpull%2F45979%2Fhead;p=ceph.git doc: cephfs: update with atime not supporting explaination Signed-off-by: Xiubo Li --- diff --git a/doc/cephfs/posix.rst b/doc/cephfs/posix.rst index a2c9c2017c72..86f930916d54 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 -----------