On Wed, Dec 14, 2011 at 00:36, Jens Rehpöhler <jens.rehpoehler@xxxxxxxx> wrote: > Attached you will find the output you asked for. Is there any limitation > on the amount of pools ? We create > pools for every customer and store their VM images in that pools. So we > will create a lot of pools over time. Each pool gets its own set of PGs (Placement Groups). An OSD that manages too many PGs will use a lot of RAM. What is "too many" is debatable, and really up to benchmarks, but considering we recommend about 100 PGs/OSD as a starting point, you probably don't want to go two orders of magnitude above that. -- 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