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Ceph is a distributed object, block, and file storage platform
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The problem is that the reply contains a capability, and as such is statefull and can't be lost. Forwards by the MDS on behalf of the client, however, introduce the possibility of multiple copies or a request in flight if one of the MDSs fails, and the client will drop any duplicate replies it receives. Alternatively, the client could _also_ parse duplicate responses (i.e. call fill_trace). I'm not sure if that's a good idea. In any case, MDS forwarded requests are only really important for dealing with flash flood scenarios on extremely large clusters, so let's just set this aside for now. |
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| branches/aleung/security1 | ||
| debian | ||
| fusetrace | ||
| src | ||
| web | ||
| .gitignore | ||
| AUTHORS | ||
| autogen.sh | ||
| ceph.spec.in | ||
| ChangeLog | ||
| configure.ac | ||
| COPYING | ||
| INSTALL | ||
| Makefile.am | ||
| NEWS | ||
| README | ||
Ceph - a scalable distributed file system
-----------------------------------------
Please see http://ceph.newdream.net/ for current info.
----
To build the Linux kernel client,
$ cd src/kernel
$ make
or
$ make KERNELDIR=/path/to/linux
$ insmod ceph.ko
$ mount -t ceph 1.2.3.4:/ /mnt/ceph
...
----
To build the server daemons, and FUSE client,
$ ./autogen.sh
$ ./configure
$ cd src
$ 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:
cmon -- monitor daemon. handles cluster state and configuration
information.
cosd -- storage daemon. stores objects on a given block device.
cmds -- metadata daemon. handles file system namespace.
cmonctl -- send commands to the monitor cluster.
userland clients:
cfuse -- fuse client.
csyn -- synthetic workload generator client.
tools:
mkmonfs -- create a fresh monfs (for a new filesystem)
monmaptool -- create/edit mon map
osdmaptool -- create/edit osd map
crushtool -- create/edit crush map
dupstore -- duplicate an osd object store (offline)
development/debugging:
fakesyn -- simulator with synthetic workload
fakefuse -- simulator that mounts with fuse
----
see also src/README