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Ceph is a distributed object, block, and file storage platform
In most cases we don't end up in this branch because there's an escape if you already have an auth_pin on the ref in question. But when you've got snapshots going on, you can process the request, block on a lock state change, commit a snapshot change to the inode, and then try to process the request again. On this second attempt, though, you end up with a different ref which you don't have a pin on. Deadlock and breakage ensues! To fix, drop all locks and auth pins when you wait -- either you don't have any to drop anyway, or you've got them on a previous version of the inode that isn't useful anymore. Signed-off-by: Greg Farnum <gregory.farnum@dreamhost.com> |
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Ceph - a scalable distributed file system ----------------------------------------- Please see http://ceph.newdream.net/ for current info. ---- To build the server daemons, and FUSE client, $ ./autogen.sh $ ./configure $ make or $ 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. ceph -- send management commands to the monitor cluster. userland clients: cfuse -- fuse client. csyn -- synthetic workload generator client. tools: 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