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| author | Ilya Dryomov <idryomov@gmail.com> | 2019-12-11 12:41:09 +0100 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2019-12-11 12:41:09 +0100 |
| commit | abd20b5ca923b386c95e218a7d0f8ac616a59969 (patch) | |
| tree | d043949cea08d8dd090a0ca8231fa1a5c80369fa /doc/man | |
| parent | Merge PR #31827 into master (diff) | |
| download | ceph-abd20b5ca923b386c95e218a7d0f8ac616a59969.tar.xz ceph-abd20b5ca923b386c95e218a7d0f8ac616a59969.zip | |
doc: clarify support for rbd fancy striping
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'doc/man')
| -rw-r--r-- | doc/man/8/rbd.rst | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/doc/man/8/rbd.rst b/doc/man/8/rbd.rst index cba9f994d85..45433775cf4 100644 --- a/doc/man/8/rbd.rst +++ b/doc/man/8/rbd.rst @@ -64,8 +64,9 @@ Parameters format is understood by all versions of librbd and the kernel rbd module, but does not support newer features like cloning. - * format 2 - Use the second rbd format, which is supported by - librbd and kernel since version 3.11 (except for striping). This adds + * format 2 - Use the second rbd format, which is supported by librbd since + the Bobtail release and the kernel rbd module since kernel 3.10 (except + for "fancy" striping, which is supported since kernel 4.17). This adds support for cloning and is more easily extensible to allow more features in the future. @@ -684,8 +685,7 @@ The striping is controlled by three parameters: we move on to the next [*stripe_count*] objects. By default, [*stripe_unit*] is the same as the object size and [*stripe_count*] is 1. Specifying a different -[*stripe_unit*] requires that the STRIPINGV2 feature be supported (added in Ceph v0.53) and format 2 images be -used. +[*stripe_unit*] and/or [*stripe_count*] is often referred to as using "fancy" striping and requires format 2. Kernel rbd (krbd) options |