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Ceph is a distributed object, block, and file storage platform
a711f2935c
There are subtle annoying problems with throttling and requeueing, and throttling at this particular point in the stack makes little sense anyway. We have - messenger queue. throttled based on total bytes/payload - op_queue, throttled before we queue items. There is no real value in throttling a message before checking whether it is valid (sent to the right osd, etc.) or putting it on the op_queue, where it will sit until a worker thread picks it up and processes it. When we get an osd_map, for instance, we pause op_queue, requeue everything on the op_queue for reprocessing, and do the map update, so not having a load of messages on that queue doesn't hurt us. It just complicates requeueing in the throttle_op_queue case, and delays the checks for non-existent PGs or misdirected requests. Signed-off-by: Sage Weil <sage@newdream.net> |
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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:
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.
cfuse -- 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