From: Sage Weil <sage@redhat.com>
Date: Fri, 2 Oct 2015 13:15:33 +0000 (-0400)
Subject: mon: disabled rocksdb compression when used as the backend
X-Git-Tag: v10.0.1~39^2~2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=ae516d7d63d94c11c4c010f607b9d23779d247b2;p=ceph.git

mon: disabled rocksdb compression when used as the backend

This significantly reduced CPU utilization on the bigbang scale
testing cluster at CERN.  Note that it is already disabled for
leveldb by default (in ceph_mon.cc).

Signed-off-by: Sage Weil <sage@redhat.com>
---

diff --git a/src/common/config_opts.h b/src/common/config_opts.h
index d3fa4e00f00f..ec57ee959df3 100644
--- a/src/common/config_opts.h
+++ b/src/common/config_opts.h
@@ -760,7 +760,7 @@ OPTION(keyvaluestore_rocksdb_options, OPT_STR, "")
 // rocksdb options that will be used for omap(if omap_backend is rocksdb)
 OPTION(filestore_rocksdb_options, OPT_STR, "")
 // rocksdb options that will be used in monstore
-OPTION(mon_rocksdb_options, OPT_STR, "")
+OPTION(mon_rocksdb_options, OPT_STR, "compression=kNoCompression")
 
 /**
  * osd_*_priority adjust the relative priority of client io, recovery io,