Method and apparatus for implementing persistent and reliable message delivery

A method for providing persistent caching of messages delivered via a publish-subscribe network, comprising the steps of:

• receiving a message having data via the publish-subscribe network;
• time-marking the data;
• caching the data in a cache memory;
• determining if a time granularity G has passed since the caching step;
• moving the cached data to a disk based on a determination that G has passed;
• determining if a persistent time-frame T has passed since the caching step for a last block of the cached data;
• and
• deleting the cached data from the disk based on a determination that T has passed for the last block of the cached data.

A method for providing persistent caching of messages delivered via a publish-subscribe subscribe network, comprising the steps of:

• (a) receiving a plurality of messages having data via the network at a plurality of upstream nodes;
• (b) time-marking the data;
• (c) caching the data in cache memories at one or more of the plurality of upstream nodes;
• (d) routing the messages to an edge node using content-based routing;
• and,
• (e) repeating steps (a) through (c) at the edge node, wherein the data is cached in a cache memory at the second node.