On Thu, 25 Oct 2018, 韦皓诚 wrote: > Hi, > We need to read multiple locations in a big object(4MB) at the same > time with librados and each part is 16KB. If librados provides a batch > read api(vector<pair<offset, length>>) and issue multiple requests to > SSD, will there be any improvement in performance? For the C API, ty rados_create_read_op(), rados_read_op_read(..) for each extent, and then rados[_aio]_read_op_operate() to do the compound operation. The interface varies a bit for the C++ and Python interfaces, but the same capability is there. sage
