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Ceph is a distributed object, block, and file storage platform
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Sage Weil 7b5689acfc messages: populate header.version in constructor 
Define a HEAD_VERSION and COMPAT_VERSION for any versioned message.  Pass
to Message constructor so that it is always initialized, even from the
the default constructor.  That's needed because we use that to check
decoding compatibility when receiving/decoding messages.

If we are conditionally encoding an old version, explicitly set
header.version in encode_payload().

We also set compat_version to demonstrate what will happen for future
revisions.  In this case, it's moot, because no old code understands
compat_version yet: nobody with old decode code will see these values
anyway.  But use this opportunity to demonstrate how it would be used in
the future.

Signed-off-by: Sage Weil <sage.weil@dreamhost.com>
2012-02-10 14:38:13 -08:00
admin doc: Switch doxygen integration from breathe to asphyxiate. 2012-01-09 19:03:56 -08:00
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README 

Ceph - a scalable distributed storage system
-----------------------------------------

Please see http://ceph.newdream.net/ for current info.

----

To build the server daemons, and FUSE client,

$ ./autogen.sh
$ ./configure
$ make

(Note that the FUSE client will only be built if libfuse is present.)

----

A quick summary of binaries that will be built in src/

daemons:
 ceph-mon -- monitor daemon.  handles cluster state and configuration
         information.
 ceph-osd -- storage daemon.  stores objects on a given block device.
 ceph-mds -- metadata daemon.  handles file system namespace.
 ceph-fuse -- fuse client.

tools:
 ceph -- send management commands to the monitor cluster.
 rados -- interact with the object store
 rbd -- manipulate rados block device images
 monmaptool -- create/edit mon map
 osdmaptool -- create/edit osd map 
 crushtool -- create/edit crush map

scripts:
 mkcephfs -- cluster mkfs tool
 init-ceph -- init.d start/stop script