Hi I'm trying to understand the relation between data size and actual disk usage. With replication x2 I am seeing a 1:4.4 ratio according to ceph (12222 MB data, 53579 MB used) and even more according to 'du -m' on the ext3 source of the ceph data (9791 MB instead of 12222 MB). What is the current default object size? A paper from 2004 by Sage et al speaks of 1 MB, a later one of 8 MB and http://diaspora.gen.nz/~rodgerd/archives/1219-Ceph.html says 4 MB. Is there a way to configure it? And is there any point in configuring it (I am using ceph to store millions of small files) or would it make no difference? Z -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
