Im seeing some disappointing performance numbers using the bs_rbd backend with a Ceph RBD pool backend over a 10GB Ethernet link. Read operations appear to max out at about 100MB/second, regardless of block size or amount of data being read and write operations fare much worse, maxing out somewhere in the 40MB/second range. Any ideas why this would be so limited? I've tested using 'fio' as well as some other perf testing utilities. On the same link, talking to the same ceph pool/image, using librados directly (either through the C or Python bindings), the read performance is 5-8x faster and write performance is 2-3x faster. Any suggestions as to how to tune the iSCSI or bs_rbd interface to perform better? thanks, Wyllys Ingersoll -- To unsubscribe from this list: send the line "unsubscribe stgt" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
