Resource Distribution Pools
- Cycle through all records according to one of three methods: Round Robin, Random, or Fixed.
- The Priority variable determines the order they are served for Fixed.
- Unlike the other pools, this type does not include any failover functionality because typically this is used to let multiple IP addresses serve for one A record.
- More details on this can be found by clicking the blue Information button next to the header for each type of record.
- Resource Distribution are included with your account at no extra charge.
- Serves the primary record, monitors it with a configurable probe, and serves the secondary record if the primary fails.
- Typically this pool type is used for basic failover redundancy with one backup.
- More details on this can be found by clicking the blue Information button next to the header for each type of record.
- Simple Failover pools are included with your account at no extra charge.
- Cycles between all active records, but it will also operate according to the Weight variable. This variable determines the record to distribute relative to the sum value of all Weight variables in the pool; for example, in a pool with two records, weights of 80/20, 8/2, and 16/4 will all operate the same.
- Probes can also be configured to monitor records and prevent them from being served in case of failure. If all records fail it will respond with an All Fail record if available, and no record otherwise.
- Typically this pool type is used for load balancing where more nuance than a Resource Distribution pool is needed, or failover capability for the pool is desired.
- More details on this can be found by clicking the blue Information button next to the header for each type of record.
- Use of Traffic Controller pools come at an additional charge. If you would like to take advantage of these pools now or in the future, your account representative can provide further information on how to add the services to your account.
- Operates very similarly to a Simple Failover pool, but with capacity for multiple records and probes.
- It will serve the active record with the highest priority, moving to the next highest priority if that record returns failed. Like with Traffic Controller, an All Fail record can also be set up.
- Typically this pool type is used for advanced failover redundancy with multiple available backups.
- More details on this can be found by clicking the blue Information button next to the header for each type of record.
- Use of Sitebacker pools come at an additional charge. If you would like to take advantage of these pools now or in the future, your account representative can provide further information on how to add the services to your account.
How Pool Records Are Returned and Using AXFR for Secondary Zones with Pools in their Primary file.
- Resource Distribution pools will return all A records in the pool upon dig or AXFR.
- Simple Failover pools will only return the currently served record, primary or secondary.
- The records for Traffic Controller and Sitebacker use a structure unique to the UltraDNS platform, so we do not advise using secondaries with zone files that contain them.