From: Florian Haas Date: Fri, 20 Feb 2015 14:25:23 +0000 (+0100) Subject: doc: explain that tell bench is non-destructive X-Git-Tag: suse_latest~35^2 X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=1aaff83141cea8cbc9a7920283fb8f78f9b46c98;p=ceph.git 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 --- 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]