common/options: document osd_deep_scrub_stride

default value change (from 0.5MB to 4MB)

Signed-off-by: Ronen Friedman <rfriedma@redhat.com>

diff --git a/PendingReleaseNotes b/PendingReleaseNotes
index f056f8e8c61cace50740f70bef0da777cf35ca4f..9432afe10e8e3c426e7f311673772588c00ceb23 100644 (file)
--- a/PendingReleaseNotes
+++ b/PendingReleaseNotes
@@ -9,6 +9,10 @@
   Admins can no longer enable the older, deprecated landing page layout by
   adjusting FEATURE_TOGGLE_DASHBOARD.
 * CephFS: The `peer_add` command is deprecated in favor of the `peer_bootstrap` command.
+* RADOS: When objects are read during deep scrubs, the data is read in strides,
+  and the scrubbing process is delayed between each read in order to avoid monopolizing
+  the I/O capacity of the OSD.
+  The default stride size (``osd_deep_scrub_stride``) was 512 KBytes, and is now 4 MBytes.
 
 >=20.0.0