Didn't quite get it, could you please elaborate? - Pradeep Jindal On Tue, Mar 29, 2016 at 12:47 AM, Vojtech Pavlik <vojtech@xxxxxxxx> wrote: > On Mon, Mar 28, 2016 at 11:47:08PM +0530, Pradeep Jindal wrote: >> Hi, >> >> I am facing a weird problem, I earlier had a configuration wherein my >> backing device was a logical volume (LVM) backed by 3 software RAID0 >> arrays having 2x1TB disks each, so totally 6TB of storage for backing >> device and 300GB logical volume (LVM) backed by SSD as a caching >> device. Both were configured as a cache set and I was getting around >> 84% cache hit ratio. >> >> Now, I have changed the backing device to a bare (no LVM, no raid) 6TB >> disk while everything else stays same (caching device on LVM, 300GB) >> and for exactly same workload I am only getting 58-60% cache hit >> ratio. >> >> I am confused, what could be the reason? > > Full stripe size writes are configured according to the backing device, > for example. > > -- > Vojtech Pavlik > Director SuSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
