From: Kefu Chai <kchai@redhat.com>
Date: Sat, 29 Jun 2019 15:15:34 +0000 (+0800)
Subject: doc/dev/crimson.rst: update with stuff related to seastar options
X-Git-Tag: v15.1.0~2341^2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=9e3e5d435e39270e65f953b6a7c1b2c55aed0d65;p=ceph.git

doc/dev/crimson.rst: update with stuff related to seastar options

Signed-off-by: Kefu Chai <kchai@redhat.com>
---

diff --git a/doc/dev/crimson.rst b/doc/dev/crimson.rst
index 4d5683876c3..29c72001428 100644
--- a/doc/dev/crimson.rst
+++ b/doc/dev/crimson.rst
@@ -92,9 +92,19 @@ using ``vstart.sh``,
 ``--redirect-output``
     redirect the stdout and stderr of service to ``out/$type.$num.stdout``.
 
+``--osd-args``
+    pass extra command line options to crimson-osd or ceph-osd. It's quite
+    useful for passing Seastar options to crimson-osd.
+
 So, a typical command to start a single-crimson-node cluster is::
 
-  MGR=1 MON=1 OSD=1 MDS=0 RGW=0 ../src/vstart.sh -n -x --without-dashboard --memstore --crimson --nodaemon --redirect-output
+  MGR=1 MON=1 OSD=1 MDS=0 RGW=0 ../src/vstart.sh -n -x --without-dashboard --memstore \
+    --crimson --nodaemon --redirect-output \
+    --osd-args "--memory 4G --smp 1 --cpuset 0"
+
+Where we assign 4 GiB memory, a single thread running on core-0 to crimson-osd.
+Please refer ``crimson-osd --help-seastar`` for more Seastar specific command
+line options.
 
 You could stop the vstart cluster using::