On Mon, May 26, 2014 at 9:46 AM, Guang Yang <yguang11@xxxxxxxxxxx> wrote: > Hello Haomai, > We are evaluating the key-value store backend which comes along with Firefly release (thanks for implementing it in Ceph), it is very promising for a couple of our use cases, after going through the related code change, I have a couple of questions which needs your help: > 1. One observation is that, for object larger than 1KB, it will be striped to multiple chunks (k-v in the leveldb table), with one strip as 1KB size. Is there any particular reason we choose 1KB as the strip size (and I didn’t find a configuration to tune this value)? 1KB is not a serious value, this value can be configured in the near future. > > 2. This is properly a leveldb question, do we expect performance degradation as the leveldb instance keeps increasing (e.g. several TB)? Ceph OSD is expected to own a physical disk, normally is several TB(1-4TB). LevelDB can take it easy. Especially we use it to store large value(compared to normal application usage). > > Thanks, > Guang -- Best Regards, Wheat -- 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
