Understanding Ceph service management
Every component of Ceph, whether it's MON, OSD, MDS, or RGW, runs as a service on top of an underlying operating system. As a Ceph storage administrator, you should know about the Ceph services and how to operate them. On Red-Hat-based distributions, Ceph daemons can be managed in different ways: as a traditional SYSVINIT or as a service. Each time you start, restart, and stop Ceph daemons (or your entire cluster), you must specify at least one option and one command. You may also specify a daemon type or a daemon instance. The general syntax for this is as follows:
{ceph service command} [options] [command] [daemons]
The Ceph options include:
--verboseor-v: This is for verbose logging.--valgrind: (It's used ...
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