I am running a rados bench seq read benchmark on an erasure-coded pool (k=2, m=1), and recording the disk activity. I notice that I always see a small number of writes to the journal partitions during the seq read run. (I always drop the caches on the osd nodes before starting the seq read run). I never see this journal write behavior with a replicated pool and I didn't think there would be any journal writes with either kind of pool on a read benchmark. The write activity is low enough that it's probably not that important performance-wise but I as just curious as to what would cause this. -- Tom Deneau -- 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
