From 9805983bcd4eab85f1745d33bb1d57bc5d1582aa Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Sun, 30 Oct 2022 18:06:57 +0100 Subject: [PATCH] doc: note architecture availability for PMEM mode of PWL cache Fixes: https://tracker.ceph.com/issues/49947 Signed-off-by: Ilya Dryomov --- doc/rbd/rbd-persistent-write-log-cache.rst | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/doc/rbd/rbd-persistent-write-log-cache.rst b/doc/rbd/rbd-persistent-write-log-cache.rst index 170cc912edb3..af323962d0c6 100644 --- a/doc/rbd/rbd-persistent-write-log-cache.rst +++ b/doc/rbd/rbd-persistent-write-log-cache.rst @@ -51,6 +51,11 @@ To enable the PWL cache, set the following configuration settings:: Value of {cache-mode} can be ``rwl``, ``ssd`` or ``disabled``. By default the cache is disabled. +The ``rwl`` cache mode depends on libpmem library (part of PMDK). It should +be universally available on x86_64 architecture and may also be available on +ppc64le and aarch64 architectures on some distributions. It is not available +on s390x architecture. + Here are some cache configuration settings: - ``rbd_persistent_cache_path`` A file folder to cache data. This folder must -- 2.47.3