[ceph-users] Concurrent append operations

Hello, I am currently evaluating Ceph for our needs and I have a question about the 'object append' feature. I note that the rados core API supports an 'append' operation, and the S3-compatible interface has too. My question is: does Ceph support concurrent append? I would like to use Ceph as a temporary store, a "buffer" if you will, for incoming data from a variety of sources. Each object would hold data for a particular identifier. I'd like to know if two or more different clients can 'append' to the same object, and the data doesn't overwrite each other, and each 'append' is added to the end of the object? Performance wise we'd likely be performing 15-20 thousand writes per second, so we'd be building a pretty big cluster on very fast flash disk. Data would only reside on the system for about an hour at most before being read and deleted. Cheers, David Bell