From 1aaff83141cea8cbc9a7920283fb8f78f9b46c98 Mon Sep 17 00:00:00 2001 From: Florian Haas Date: Fri, 20 Feb 2015 15:25:23 +0100 Subject: [PATCH] doc: explain that tell bench is non-destructive Mention that "ceph tell osd.N bench" will not overwrite data in a live OSD, but might temporarily affect OSD performance. Signed-off-by: Florian Haas --- doc/rados/operations/control.rst | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/doc/rados/operations/control.rst b/doc/rados/operations/control.rst index 35feaee81f3d..293cdb005f6b 100644 --- a/doc/rados/operations/control.rst +++ b/doc/rados/operations/control.rst @@ -286,7 +286,10 @@ Sends a repair command to OSD.N. To send the command to all OSDs, use ``*``. :: Runs a simple throughput benchmark against OSD.N, writing ``NUMBER_OF_OBJECTS`` in write requests of ``BYTES_PER_WRITE`` each. By default, the test -writes 1 GB in total in 4-MB increments. :: +writes 1 GB in total in 4-MB increments. +The benchmark is non-destructive and will not overwrite existing live +OSD data, but might temporarily affect the performance of clients +concurrently accessing the OSD. :: ceph tell osd.N bench [NUMER_OF_OBJECTS] [BYTES_PER_WRITE] -- 2.47.3