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Diffstat (limited to 'src/ceph/doc/dev/context.rst')
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diff --git a/src/ceph/doc/dev/context.rst b/src/ceph/doc/dev/context.rst deleted file mode 100644 index 1a2b2cb..0000000 --- a/src/ceph/doc/dev/context.rst +++ /dev/null @@ -1,20 +0,0 @@ -============= - CephContext -============= - -A CephContext represents a single view of the Ceph cluster. It comes complete -with a configuration, a set of performance counters (PerfCounters), and a -heartbeat map. You can find more information about CephContext in -src/common/ceph_context.h. - -Generally, you will have only one CephContext in your application, called -g_ceph_context. However, in library code, it is possible that the library user -will initialize multiple CephContexts. For example, this would happen if he -called rados_create more than once. - -A ceph context is required to issue log messages. Why is this? Well, without -the CephContext, we would not know which log messages were disabled and which -were enabled. The dout() macro implicitly references g_ceph_context, so it -can't be used in library code. It is fine to use dout and derr in daemons, but -in library code, you must use ldout and lderr, and pass in your own CephContext -object. The compiler will enforce this restriction. |