These sorts of questions are good for ceph-devel at vger.kernel.org, which I've added. :) On Thu, Jul 31, 2014 at 12:24 PM, yuelongguang <fastsync at 163.com> wrote: > hi,all > recently i dive into the source code, i am a little confused about them, > maybe because of many threads,wait,seq. > > 1. what does apply_manager do? it is related to filestore and file journal. It's a utility class implemented in the "JournalingObjectStore" class (which FileStore inherits from and implements). I'm not super familiar with this system but it's basically just the functions that deal with committing writes to the journal and applying them to the backing filesystem. > 2. what does SubmitManager do? This one is used by the FileStore when it's actively submitting ops; the real purpose is pretty much to take and drop a lock which serializes the operations and protects access to various data members. > 3. how they interact and work together? Perhaps you can ask a more specific question? -Greg Software Engineer #42 @ http://inktank.com | http://ceph.com
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