On 06/21/2012 11:09 AM, [email protected] wrote: > int forward_write_obj_req(struct request *req) > { > int i, fd, ret, pollret; > @@ -106,6 +144,14 @@ int forward_write_obj_req(struct request *req) > memcpy(&fwd_hdr, &req->rq, sizeof(fwd_hdr)); > fwd_hdr.flags |= SD_FLAG_CMD_IO_LOCAL; > > + if (fwd_hdr.flags & SD_FLAG_CMD_COW) { > + ret = do_cow_at_local(req, &fwd_hdr); > + if (!ret) { > + fwd_hdr.flags &= ~SD_FLAG_CMD_COW; > + req->rq.flags &= ~SD_FLAG_CMD_COW; > + } > + } > + > wlen = fwd_hdr.data_length;
This optimization should be handled before forward_write_obj_req(), which handles request forwarding only. If we do an early COW object reading at gateway node, it seems we don't need the COW code in store_create_and_write(). Thanks, Yuan -- sheepdog mailing list [email protected] http://lists.wpkg.org/mailman/listinfo/sheepdog
