| Upstream |
Item |
LDM 5 |
LDM 6 |
| Selection of HEREIS message vs. COMINGSOON message |
If product size <= 16 KB, then use HEREIS; otherwise
use COMINGSOON |
If product size <= configurable, request-dependent limit,
then use HEREIS; otherwise use COMINGSOON |
| Action after sending HEREIS message |
Wait for reply |
Don't wait for reply |
| Number and size of BLKDATA messages |
As many 16 KB messages as necessary to contain the product |
One message containing the entire product |
| Maximum amount of time between RPC messages |
5 minutes |
30 seconds |
| Downstream |
| Multiple requests to same upstream LDM |
Are consolidated into one request, resulting in one
connection |
Are not consolidated, resulting in multiple connections |
| Action upon receipt of HEREIS message |
If new or duplicate product, then reply with OK message; otherwise,
reply with RECLASS message |
Don't reply |
| Reconnection strategy |
If nothing in 12 minutes, then reconnect |
If nothing in 1 minute, then connect to top-level upstream LDM
server and send IS_ALIVE message. Reconnect if and only if
reply indicates sending LDM has terminated. |
