doc/rados/ops: edit cache-tiering.rst

Remove part of a sentence that might have led readers to think that it
is a good idea to deploy cache tiering on releases prior to Reef.

This incorporates Anthony D'Atri's suggestion from here: https://github.com/ceph/ceph/pull/63614#discussion_r2116020937

Signed-off-by: Zac Dover <zac.dover@proton.me>
(cherry picked from commit 3618b1bbbb0096a8a08f59aeb6b7436ef9d0c12e)

diff --git a/doc/rados/operations/cache-tiering.rst b/doc/rados/operations/cache-tiering.rst
index b7cb099a4ad1e03aa11906dc047d325f7b73f450..762ec6454b24ca4dd9e80a342be42ae08a077ab2 100644 (file)
--- a/doc/rados/operations/cache-tiering.rst
+++ b/doc/rados/operations/cache-tiering.rst
@@ -2,10 +2,13 @@
  Cache Tiering
 ===============
 
-.. warning:: Cache tiering has been deprecated in the Reef release as it
-             has lacked a maintainer for a very long time. This does not mean
-             it will be certainly removed, but we may choose to remove it
-             without much further notice.
+.. warning:: Cache tiering has been deprecated in the Reef release. Cache
+   tiering has lacked a maintainer for a long time. This does not mean that
+   it will certainly be removed, but it might be removed without much
+   notice.
+
+   The upstream Ceph community strongly advises against deploying new cache
+   tiers.
 
 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