Abstract: The reliable writing of data to multiple data stores using a write agent. The overall write operation is managed by a write manager that is communicatively coupled to the write agent and to a certain data store. Upon determined that multiple data stores are to be written to, the write manager first instructs the write agent to perform a delay write to other data store(s). The delay write means that the write agents waits a delay time before performing the write unless instructed in the meantime to more immediately perform the write, and if a delay passes, does not perform the write without first checking that the write has been made to the certain data store. After instructing the write agent to delay write, the write manager attempts to write to the certain data store. Upon successfully writing to the certain data store, the write manager may instruct the write agent to proceed immediately.

Abstract: The definition of campaign tactics as associating customized content to associated audiences in a relational database. These associations may be cached in a content association mapping that may be read from without accessing the database. The content association mappings may cached in one or more front end servers, and may be updated periodically by navigating the relational database. For a given tactic, the system determines whether a user is a member of the associated audience, identifies the content to be delivered by referring to the content association mapping, and then delivers the content to the user.

Abstract: The reliable writing of data to multiple data stores using a write agent. The overall write operation is managed by a write manager that is communicatively coupled to the write agent and to a certain data store. Upon determined that multiple data stores are to be written to, the write manager first instructs the write agent to perform a delay write to other data store(s). The delay write means that the write agents waits a delay time before performing the write unless instructed in the meantime to more immediately perform the write, and if a delay passes, does not perform the write without first checking that the write has been made to the certain data store. After instructing the write agent to delay write, the write manager attempts to write to the certain data store. Upon successfully writing to the certain data store, the write manager may instruct the write agent to proceed immediately.

Abstract: The formulation of a profile group of users by defining segments using a function as applied to a single attribute, and combining them with set operations. The segments may be populated by applying the selected function against the selected attribute against multiple users. Then, the profile groups build upon the segments and are populated by applying the selected operations against the selected combination of segments. This represents an efficient mechanism for formulating profile groups based on user attributes.

Abstract: The definition of campaign tactics as associating customized content to associated audiences in a relational database. These associations may be cached in a content association mapping that may be read from without accessing the database. The content association mappings may cached in one or more front end servers, and may be updated periodically by navigating the relational database. For a given tactic, the system determines whether a user is a member of the associated audience, identifies the content to be delivered by referring to the content association mapping, and then delivers the content to the user.

Abstract: The formulation of a profile group of users by defining segments using a function as applied to a single attribute, and combining them with set operations. The segments may be populated by applying the selected function against the selected attribute against multiple users. Then, the profile groups build upon the segments and are populated by applying the selected operations against the selected combination of segments. This represents an efficient mechanism for formulating profile groups based on user attributes.