After the sysbench prepare operation is completed, about 48883MB of db data is generated. I set the fast partition to 30GB, so in the sysbench run stage, eviction was taking place. Mark Nelson <mnelson@xxxxxxxxxx> 于2019年10月12日周六 上午12:15写道： > > Hi Honggang, > > > I personally I find this very exciting! I was hoping that we might > eventually try local caching in bluestore especially given trends for > larger NVMe devices and pmem. When you were running performance tests, > did you run any tests where the data set size was significantly larger > than the available "fast" local tier cache (ie so that eviction was > taking place)? In the past, that's been the area we've really needed to > focus on getting right. > > > Mark > > > On 10/11/19 11:04 AM, Honggang(Joseph) Yang wrote: > > Hi, > > > > We implemented a new cache tier mode - local mode. In this mode, an > > osd is configured to manage two data devices, one is fast device, one > > is slow device. Hot objects are promoted from slow device to fast > > device, and demoted from fast device to slow device when they become > > cold. > > > > The introduction of tier local mode in detail is > > https://tracker.ceph.com/issues/42286 > > > > tier local mode: https://github.com/yanghonggang/ceph/commits/wip-tier-new > > > > This work is based on ceph v12.2.5. I'm glad to port it to master > > branch if needed. > > > > Any advice and suggestions will be greatly appreciated. > > > > thx, > > > > Yang Honggang
