Email server with enhanced least recently used (LRU) cache

• US 20070073813A1
• Filed: 09/27/2005
• Published: 03/29/2007
• Est. Priority Date: 09/27/2005
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Teamon Systems Incorporated State of Incorporation Delaware
• Inventors: Clarke, David, Kamat, Harshad
• Granted Patent: US 8,307,036 B2
• Time in Patent Office: Days
• US Class Current: 709/206
• CPC Class Codes: H04L 51/00 User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
• CPC Class Codes: H04L 51/42 Mailbox-related aspects, e.g. synchronisation of mailboxes

Abstract

An electronic mail (email) server includes a proxy that obtains mappings for unique identifiers (UID'"'"'s) corresponding to new electronic messages that have been determined form a polling operation. A Least Recently Used (LRU) cache caches each new message and releases from cache least recently used messages. A memory in which all messages within the LRU cache are spooled.

Claims

1. An electronic mail (email) server comprising:

a proxy that obtains mappings for unique identifiers (UID'"'"'s) corresponding to new electronic messages that had been determined from a polling operation;

a least recently used (LRU) cache that caches each new message and releases from cache least recently used messages; and

a memory in which all messages within the LRU cache are spooled.

2. The email server according to claim 1, wherein said memory comprises a disk memory having an input/output through which the new messages are input and output.

3. The email server according to claim 2, wherein said input/output varies in its request per second based on the number of proxies per partition.

4. The email server according to claim 3, wherein said input/output has fewer requests per second when a greater number of proxies per partition exist on the disk memory.

5. The email server according to claim 1, wherein said proxy is operative for filtering out received headers from a new message to aid in reducing an overall size of a new message.

6. An electronic mail (email) server comprising:

a least recently used (LRU) cache that caches new electronic messages determined from a polling operation and releases from cache least recently used messages; and

a disk memory in which all new messages within the LRU cache are spooled.

7. The email server according to claim 6, wherein said disk memory includes an input/output through which the new messages are input and output.

8. The email server according to claim 7, wherein said input/output varies in its request per second based on the number of proxies per partition.

9. The email server according to claim 8, wherein said input/output has fewer request per second when a greater number of proxies per partition exist on the disk memory.

10. A communications system comprising:

a polling engine that polls an electronic mailbox of a user to retrieve unique identifiers (UID'"'"'s) of new messages;

a proxy that obtains mappings for the new messages;

a least recently used (LRU) cache that caches each new message and releases from cache least recently used messages; and

a memory in which all new messages within the LRU cache are spooled.

11. The communications system according to claim 10, wherein said memory comprises a disk memory having an input/output through which the new messages are input and output.

12. The communications system according to claim 11, wherein said input/output varies in its request per second based on the number of proxies per partition.

13. The communications system according to claim 12, wherein said input/output has fewer request per second when a greater number of proxies per partition exist on the disk memory.

14. The communications system according to claim 12, wherein said proxy is operative for filtering out received headers from a new message to aid in reducing an overall size of a new message.

15. An electronic mail (email) processing method, which comprises:

polling an electronic mailbox of a user to retrieve unique identifiers (UID'"'"'s) of new messages;

obtaining mappings for the new messages;

caching each new message within a least recently used (LRU) cache; and

spooling all messages within the LRU cache to memory.

16. A method according to claim 15, which further comprises spooling all new messages to a disk memory.

17. A method according to claim 16, which further comprises varying the requests per second in and out of the disk memory based on a proxy per partition.

18. A method according to claim 15, which further comprises filtering out received headers from a new message to aid in reducing an overall size of new message.

19. A computer-readable medium having computer-executable modules comprising:

a least recently used (LRU) cache that caches new electronic messages determined from a polling operation and releases from cache least recently used messages; and

a memory in which all messages within the LRU cache are spooled.

20. A computer-readable medium according to claim 19, wherein the memory comprises a disk memory.