Table 25-1 provides a comparison between the features of XRF and RSR.
Table 25-1. Comparison between XRF and RSR Features
XRF | RSR |
|---|
Uses same physical log data sets and database data sets for active IMS and alternate IMS. | Uses completely separate log data sets and database data sets. |
Active and alternate IMSs must be within the distance restrictions of the channel-to-channel connection between them. | Active and tracking systems are connected by network. Only limit on separation is network response. |
Active IMS and alternate IMS must use IMS TM. | Active IMS can be any system updating IMS resources: DB/DC, TM only, DB only, or batch. The tracking IMS can be DB/DC or DBCTL. |
One-to-one relationship between active IMS and alternate IMS. | One tracking IMS tracks many active IMSs. |
All committed updates recorded on alternate IMS. | If there is a gap in the log data at the time of an unplanned takeover, any log data that comes after the gap is removed to ensure system integrity. |
Switching to or from alternate IMS is comparatively simple. | Takeovers are more complex than for XRF. |
Switch to alternate IMS takes one minute. | Switch to alternate takes less one hour. |