Mapping data locations using data transmissions

Patent metadata

Field	Value
Publication number	US-10019403-B2
Application number	US-201514932003-A
Country	US
Kind code	B2
Filing date	Nov 4, 2015
Priority date	Nov 4, 2015
Publication date	Jul 10, 2018
Grant date	Jul 10, 2018

Abstract

A host sends an I/O transaction. The I/O transaction relates to a read or write operation for a first datum. A first listening service which manages I/O transactions for a first set of addresses receives the I/O transaction. The first listening service forwards the I/O transaction to a second listening service. The second listening service manages I/O transactions for a second set of addresses. The second listening service executes the I/O transaction at a selected address of the second set of addresses. The second listening service creates a data packet to respond to the I/O transaction. The header of the data packet includes the selected address. The second listening service transmits the data packet to the host. The host uses the selected address to update a database which includes addresses of data within.

First claim

What is claimed is:

1. A method of mapping data addresses, the method comprising:
creating, by a host that utilizes a database of addresses of data, a first input/output (I/O) transaction, wherein the first I/O transaction is a read or write request related to a first datum;
transmitting, by the host, the first I/O transaction to a first listening service;
receiving, by the first listening service, the first I/O transaction, wherein the first listening service manages I/O transactions for a first set of addresses,
forwarding, by the first listening service, the first I/O transaction to a second listening service that manages I/O transactions for a second set of addresses;
executing, by the second listening service, the first I/O transaction at a selected address of the second set of addresses, wherein the selected address relates to the first datum;
creating a first data packet to respond to the first I/O transaction, wherein a header of the first data packet includes the selected address;
transmitting, by the first listening service, the first data packet to the host; and
updating, by the host, the databases of addresses with the selected address.

2. The method of claim 1 , wherein the first data packet is transmitted to the host using small computer system interface (SCSI) protocol.

3. The method of claim 1 , wherein transmitting the first I/O transaction to the first listening service includes using the database of addresses to determine an address of the first datum, wherein the address is included in the first set of addresses.

4. The method of claim 3 , wherein the host is configured to use the database of addresses to identify the selected address of the first datum for a second I/O transaction.

5. The method of claim 4 , further comprising:
receiving the second I/O transaction by the second listening service, wherein the second I/O transaction is a read or write request from the host related to the first datum;
executing, by the second listening service, the second I/O transaction at the selected address, wherein the selected address relates to the first datum;
creating, by the second listening service, a second data packet to respond to the second I/O transaction, wherein a header of the second data packet includes the selected address; and
transmitting, by the second listening service, the second data packet to the host.

6. The method of claim 1 , further comprising:
forwarding, by the second listening service, data of the execution of the first I/O transaction at the selected address to the first listening service; and
creating the first data packet via the first listening service.

7. The method of claim 1 , wherein the host is configured to maintain a data map by removing underutilized addresses of the data map.

8. A system, comprising:
a processor; and
a memory coupled to the processor, wherein the memory comprises instructions which, when executed by the processor, cause the processor to:
create, by a host that utilizes a database of addresses of data, a first input/output (I/O) transaction, wherein the first I/O transaction is a read or write request related to a first datum;
transmit, by the host, the first I/O transaction to a first listening service;
receive, by the first listening service, the first I/O transaction, wherein the first listening service manages I/O transactions for a first set of addresses,
forward, by the first listening service, the first I/O transaction to a second listening service that manages I/O transactions for a second set of addresses;
execute, by the second listening service, the first I/O transaction at a selected address of the second set of addresses, wherein the selected address relates to the first datum;
create a first data packet to respond to the first I/O transaction, wherein a header of the first data packet includes the selected address;
transmit, by the first listening service, the first data packet to the host; and
update, by the host, the databases of addresses with the selected address.

9. The system of claim 8 , wherein the first data packet is transmitted to the host using SCSI protocol.

10. The system of claim 8 , wherein transmitting the first I/O transaction to the first listening service includes using the database of addresses to determine an address of the first datum, wherein the address is included in the first set of addresses.

11. The system of claim 10 , wherein the host is configured to use the database of addresses to identify the selected address of the first datum for a second I/O transaction relating to the first datum.

12. The system of claim 11 , wherein the memory further comprises instructions which, when executed by the processor, cause the processor to:
receive the second I/O transaction by the second listening service, wherein the second I/O transaction is a read or write request from the host related to the first datum;
execute, by the second listening service, the second I/O transaction at the selected address, wherein the selected address relates to the first datum;
create, by the second listening service, a second data packet to respond to the second I/O transaction, wherein a header of the second data packet includes the selected address; and
transmit, by the second listening service, the second data packet to the host.

13. The system of claim 8 , wherein the memory further comprises instructions which, when executed by the processor, cause the processor to:
forward, by the second listening service, data of the execution of the first I/O transaction at the selected address to the first listening service; and
create the first data packet via the first listening service.

14. The system of claim 8 , wherein the host is configured to maintain a data map by removing underutilized addresses of the data map.

15. A computer program product for transmitting data packets, the computer program product disposed upon a computer readable storage medium, the computer program product comprising computer program instructions that, when executed by a computer processor of a computer, cause the computer to:
create, by a host that utilizes a database of addresses of data, a first input/output (I/O) transaction, wherein the first I/O transaction is a read or write request related to a first datum;
transmit, by the host, the first I/O transaction to a first listening service;
receive, by the first listening service, the first I/O transaction, wherein the first listening service manages I/O transactions for a first set of addresses of the storage device,
forward, by the first listening service, the first I/O transaction to a second listening service that manages I/O transactions for a second set of addresses;
execute, by the second listening service, the first I/O transaction at a selected address of the second set of addresses, wherein the selected address relates to the first datum;
create a first data packet to respond to the first I/O transaction, wherein a header of the first data packet includes the selected address;
transmit, by the first listening service, the first data packet to the host; and
update, by the host, the databases of addresses with the selected address.

16. The computer program product of claim 15 , wherein the first data packet is transmitted to the host using SCSI protocol.

17. The computer program product of claim 15 , wherein the computer program product further comprising computer program instructions that, when executed by a computer processor of a computer, cause the computer to transmit the first I/O transaction to the first lis

Assignees

• IBM

Inventors

• Goldberg Itzhack
• Mcgregor Harry
• Moore Christopher B
• Pieper Gerhard H

Classifications

• G06F13/404

  with address mapping · CPC title

• G06F13/4282 Primary

  on a serial bus, e.g. I2C bus, SPI bus (on daisy chain buses G06F13/4247) · CPC title

• G06F13/122

  where hardware performs an I/O function other than control of data transfer · CPC title

• G06F2201/87

  Monitoring of transactions · CPC title

• G06F16/9562

  Bookmark management · CPC title