The core RADOS api will order these on the osd as it receives the operations from clients, and nothing will break if you submit 2 in parallel. I’m less familiar with the S3 interface but I believe appends there will be ordered by the rgw daemon and so will be much slower. Or maybe it works the same as a normal s3 object overwrite and the second one will win and the first one goes into oblivion? Either way it probably won’t fit your needs. -Greg On Mon, Jan 20, 2020 at 3:42 PM David Bell <david.bell@xxxxxxxxxx> wrote: > 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 > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx > > _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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