Reducing Data Storage Requirements on Mail Servers by Storing a Shared Copy of a Message

• US 20080052324A1
• Filed: 10/30/2007
• Published: 02/28/2008
• Est. Priority Date: 08/01/2002
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Jnagal, Amit, Choubey, Utkarash
• Granted Patent: US 8,214,326 B2
• Time in Patent Office: Days
• US Class Current: 707/201
• CPC Class Codes: G06Q 10/107 Computer-aided management of electronic mailing [e-mailing]
• 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

A mail server detects if an incoming message is addressed to multiple recipients, in which case redundant data storage is reduced. A single shared copy of the message is stored, and a reference message, which refers to the shared message, is provided to the addressed recipients. A record of the number of existing reference messages is maintained, and decremented as each reference message is deleted by recipients. When no reference messages remain, the shared message is also deleted. A record of recipients authorized to access the shared message is also maintained, and updated as recipients delete their reference messages.

Claims

1-17. -17. (canceled)

18. A method for reducing data storage requirements of a mail server, the method comprising the steps of:

determining, for an incoming message having a certain size, the size of the incoming email message;

determining a selected recipient count for recipients of the email message, the selected recipient count indicating how many of the recipients have mailboxes on the mail server;

calculating a total amount of storage for storing copies of the message in each one of the recipient'"'"'s mailboxes on the mail server, the calculating being a function of the size of the incoming email message and the selected recipient count;

comparing the calculated total amount of storage to a predetermined limit; and

selecting between i) storing copies of the message in the respective mailboxes of the multiple recipients, such that multiple copies of the message are stored on the mail server in the mailboxes of the multiple recipients, and ii) storing for the mailboxes of the multiple recipients, and sharing among the mailboxes of the multiple recipients, only a single copy of the incoming message on the mail server as a shared message for the mailboxes of the multiple recipients, wherein the selecting is responsive to the comparing.

19. The method of claim 18, wherein the determining of the size of the incoming email message is responsive to the incoming email message being addressed to multiple recipients.

20. The method of claim 19, wherein the determining of the size of the incoming email message is responsive to the multiple recipients having mailboxes on the mail server.

21. The method of claim 18, comprising the step of:

storing a list of recipients authorized to view the incoming message, wherein the storing of the list is responsive to selecting to store only a single copy of the incoming message on the mail server as a shared message for the mailboxes of the multiple recipients

22. The method of claim 18, comprising the step of:

storing an identifier for the single copy of the incoming message.

23. The method of claim 21, comprising the step of:

storing an identifier for the single copy of the incoming message, wherein the stored identifier is associated with the stored list of recipients.

24. A computer program product, stored on a computer readable medium, for reducing data storage requirements of a mail server, the computer program product having instructions for execution by a computer, wherein the instructions, when executed by the computer, cause the computer to implement a method comprising the steps of:

determining, for an incoming message having a certain size, the size of the incoming email message;

determining a selected recipient count for recipients of the email message, the selected recipient count indicating how many of the recipients have mailboxes on the mail server;

calculating a total amount of storage for storing copies of the message in each one of the recipient'"'"'s mailboxes on the mail server, the calculating being a function of the size of the incoming email message and the selected recipient count;

comparing the calculated total amount of storage to a predetermined limit; and

selecting between i) storing copies of the message in the respective mailboxes of the multiple recipients, such that multiple copies of the message are stored on the mail server in the mailboxes of the multiple recipients, and ii) storing for the mailboxes of the multiple recipients, and sharing among the mailboxes of the multiple recipients, only a single copy of the incoming message on the mail server as a shared message for the mailboxes of the multiple recipients, wherein the selecting is responsive to the comparing.

25. The computer program product of claim 24, wherein the determining of the size of the incoming email message is responsive to the incoming email message being addressed to multiple recipients.

26. The computer program product of claim 25, wherein the determining of the size of the incoming email message is responsive to the multiple recipients having mailboxes on the mail server.

27. The computer program product of claim 24, wherein the method implemented by the computer executing the instructions of the computer program product comprises the step of:

storing a list of recipients authorized to view the incoming message, wherein the storing of the list is responsive to selecting to store only a single copy of the incoming message on the mail server as a shared message for the mailboxes of the multiple recipients

28. The computer program product of claim 24, wherein the method implemented by the computer executing the instructions of the computer program product comprises the step of:

storing an identifier for the single copy of the incoming message.

29. The computer program product of claim 27, wherein the method implemented by the computer executing the instructions of the computer program product comprises the step of:

storing an identifier for the single copy of the incoming message, wherein the stored identifier is associated with the stored list of recipients.

30. A computer system comprising:

a processor; and

a storage device connected to the processor, wherein the storage device has stored thereon data storage reducing program for controlling the processor, and wherein the processor is operative to execute instructions of the program to implement a method comprising the steps of;

determining, for an incoming message having a certain size, the size of the incoming email message;

determining a selected recipient count for recipients of the email message, the selected recipient count indicating how many of the recipients have mailboxes on the mail server;

calculating a total amount of storage for storing copies of the message in each one of the recipient'"'"'s mailboxes on the mail server, the calculating being a function of the size of the incoming email message and the selected recipient count;

comparing the calculated total amount of storage to a predetermined limit; and

selecting between i) storing copies of the message in the respective mailboxes of the multiple recipients, such that multiple copies of the message are stored on the mail server in the mailboxes of the multiple recipients, and ii) storing for the mailboxes of the multiple recipients, and sharing among the mailboxes of the multiple recipients, only a single copy of the incoming message on the mail server as a shared message for the mailboxes of the multiple recipients, wherein the selecting is responsive to the comparing.

31. The computer system of claim 30, wherein the determining of the size of the incoming email message is responsive to the incoming email message being addressed to multiple recipients.

32. The computer program product of claim 31, wherein the determining of the size of the incoming email message is responsive to the multiple recipients having mailboxes on the mail server.

33. The computer system of claim 30, wherein the method implemented by the computer executing the instructions of the computer program product comprises the step of:

storing a list of recipients authorized to view the incoming message, wherein the storing of the list is responsive to selecting to store only a single copy of the incoming message on the mail server as a shared message for the mailboxes of the multiple recipients

34. The computer system of claim 30, wherein the method implemented by the computer executing the instructions of the computer program product comprises the step of:

storing an identifier for the single copy of the incoming message.

35. The computer system of claim 33, wherein the method implemented by the computer executing the instructions of the computer program product comprises the step of:

storing an identifier for the single copy of the incoming message, wherein the stored identifier is associated with the stored list of recipients.