From ef95d4bc325c434924a328aaa234557102548ec0 Mon Sep 17 00:00:00 2001 From: Zac Dover Date: Mon, 22 May 2023 11:35:26 +1000 Subject: [PATCH] doc: note deprecation of Cache Tiering in Reef Add a note to the documentation that cache tiering is deprecated in Reef. Signed-off-by: Zac Dover (cherry picked from commit 7f9eaf7a8ef95d611df81463424cfd06472db356) --- doc/architecture.rst | 2 ++ doc/rados/operations/cache-tiering.rst | 2 ++ doc/rados/operations/erasure-code.rst | 2 ++ 3 files changed, 6 insertions(+) diff --git a/doc/architecture.rst b/doc/architecture.rst index f2b99a5664764..405263557fd4c 100644 --- a/doc/architecture.rst +++ b/doc/architecture.rst @@ -1094,6 +1094,8 @@ See `Erasure Code Notes`_ for additional details. Cache Tiering ------------- +.. note:: Cache tiering is deprecated in Reef. + A cache tier provides Ceph Clients with better I/O performance for a subset of the data stored in a backing storage tier. Cache tiering involves creating a pool of relatively fast/expensive storage devices (e.g., solid state drives) diff --git a/doc/rados/operations/cache-tiering.rst b/doc/rados/operations/cache-tiering.rst index cd29b87d0cfa6..b2b235d628edd 100644 --- a/doc/rados/operations/cache-tiering.rst +++ b/doc/rados/operations/cache-tiering.rst @@ -6,6 +6,8 @@ it will be certainly removed, but we may choose to remove it without much further notice. +.. note:: Cache tiering is deprecated in Reef. + A cache tier provides Ceph Clients with better I/O performance for a subset of the data stored in a backing storage tier. Cache tiering involves creating a pool of relatively fast/expensive storage devices (e.g., solid state drives) diff --git a/doc/rados/operations/erasure-code.rst b/doc/rados/operations/erasure-code.rst index 8befed9e8b3d7..ccb2099394c56 100644 --- a/doc/rados/operations/erasure-code.rst +++ b/doc/rados/operations/erasure-code.rst @@ -196,6 +196,8 @@ file system creation or via `file layouts <../../../cephfs/file-layouts>`_. Erasure-coded pools and cache tiering ------------------------------------- +.. note:: Cache tiering is deprecated in Reef. + Erasure-coded pools require more resources than replicated pools and lack some of the functionality supported by replicated pools (for example, omap). To overcome these limitations, one can set up a `cache tier <../cache-tiering>`_ -- 2.39.5