Power management method using fabric network and fabric network system using power management method

Patent metadata

Field	Value
Publication number	US-10001827-B2
Application number	US-201615291266-A
Country	US
Kind code	B2
Filing date	Oct 12, 2016
Priority date	Nov 23, 2015
Publication date	Jun 19, 2018
Grant date	Jun 19, 2018

Abstract

A power management method includes monitoring a status of an external interface of external interfaces between the fabric network and at least one host, and a status of an internal interface of internal interfaces between the fabric network and at least one storage device of a plurality of storage devices. The power management method further includes calculating aggregate information of bandwidths of internal interfaces of the plurality of storage devices based on the monitoring, the at least one storage device connected to the at least one host. The method further includes adjusting the bandwidths of the internal interfaces such that the aggregate information of the bandwidths of the internal interfaces is within a threshold range, the threshold range based on a bandwidth of the external interface connected to the at least one host.

First claim

What is claimed is:

1. A power management method using a fabric network, the power management method comprising:
monitoring a status of at least one of a number of external interfaces between the fabric network and at least one host, and monitoring a status of at least one of a plurality of internal interfaces between the fabric network and at least one storage device, the at least one host configured to access the at least one storage device through the fabric network;
calculating aggregate information of bandwidths of the plurality of internal interfaces based on the monitoring of the status of the at least one of the number of external interfaces and the at least one host; and
adjusting the bandwidths of the plurality of internal interfaces such that the aggregate information of the bandwidths of the plurality of internal interfaces is within a threshold range, the threshold range being based on a bandwidth of the at least one of the number of external interfaces connected to the at least one host.

2. The power management method of claim 1 , wherein
the monitoring the status of the at least one of the number of external interfaces includes,
detecting the bandwidth of the at least one of the number of external interfaces based on external interface bandwidth configuration information, and

the monitoring the status of the at least of the plurality of internal interfaces includes,
detecting the bandwidths of the plurality of the internal interfaces based on internal interface bandwidth configuration information.

3. The power management method of claim 1 , wherein the adjusting the bandwidths of the plurality of internal interfaces includes,
setting a first bandwidth of the threshold range as a sum of (i) the bandwidth of the at least one of the number of external interfaces and (ii) a first threshold value, and
setting a second bandwidth of the threshold range as a sum of (i) the bandwidth of the at least one of the number of external interfaces and (ii) a second threshold value, the second threshold value is greater than the first threshold value.

4. The power management method of claim 3 , further comprising:
maintaining an input/output performance according to the bandwidth of the at least one of the number of external interfaces based on the first and second threshold values; and
reducing a power consumption by the at least one storage device while maintaining the input/output performance.

5. The power management method of claim 4 , further comprising:
determining the first threshold value and the second threshold value based on empirical data.

6. The power management method of claim 1 , wherein the adjusting the bandwidths of the plurality of internal interfaces includes,
determining the threshold range based on a correlation between a number of the at least one storage device configured to access the fabric network, an input/output performance of the bandwidths of the plurality of internal interfaces, and power consumption of the at least one storage device.

7. The power management method of claim 1 , wherein the calculating calculates the aggregate information of the bandwidths of the plurality of internal interfaces if a plurality of the at least one host access the fabric network.

8. The power management method of claim 7 , wherein the adjusting the bandwidths of the plurality of internal interfaces includes,
adjusting the bandwidths of the plurality of internal interfaces based on bandwidths of the number of external interfaces such that the aggregate information of the bandwidths of the plurality of internal interfaces is within the threshold range, the bandwidths of the number of external interfaces connected to the plurality of the at least one host.

9. The power management method of claim 1 , further comprising:
mapping groups of a plurality of the at least one storage device to a plurality of the at least one host based on bandwidths of the plurality of the at least one host if the plurality of the at least one host access the fabric network.

10. The power management method of claim 9 , wherein the adjusting
adjusts the bandwidths of the plurality of internal interfaces based on the calculated aggregate information of the bandwidth of at least one of the plurality of internal interfaces and the bandwidth of the at least one of the number of external interfaces.

11. The power management method of claim 1 , further comprising:
connecting the at least one host and the at least one storage device via an interface, the interface includes one of a Component Interconnect Express (PCIe) interface, a Serial Attached Small Computer System Interface (SAS), a Serial Advanced Technology Attachment (SATA) interface, and a network interface.

12. A fabric network system comprising:
a fabric network including a plurality of ports, the fabric network configured to support communication between a host and a plurality of storage devices, the plurality of storage devices connected to access the plurality of ports,
a monitor configured to,
monitor a status of an external interface connected to the host, and
monitor statuses of internal interfaces connected to the plurality of storage devices; and

a controller configured to,
adjust bandwidths of the internal interfaces based on the monitored status of the external interface and the monitored statuses of the internal interfaces such that a bandwidth used by the host is maintained and power consumption of the plurality of storage devices is reduced.

13. The fabric network system of claim 12 , wherein the monitor is further configured to,
detect a bandwidth of the external interface based on external interface bandwidth configuration information, and
detect the bandwidths of the internal interfaces based on internal interface bandwidth configuration information from the host.

14. The fabric network system of claim 12 , wherein the controller is further configured to,
calculate aggregate information of the bandwidths of the internal interfaces based on the monitored status of the external interface and the monitored statuses of the internal interfaces, and
adjust the bandwidths of the internal interfaces such that the calculated aggregate information of the bandwidths of the internal interfaces is within a threshold range based on a bandwidth of the external interface.

15. The fabric network system of claim 12 , wherein the controller is further configured to,
map groups of the plurality of storage devices to the host based on the bandwidth used by the host if the host accesses the fabric network, and
adjust the bandwidths of the internal interfaces for the mapped groups of the plurality of storage devices.

16. A power management method comprising:
calculating aggregate information of bandwidths of a plurality of storage devices in a storage system, each of the plurality of storage devices configured to access a host connected to a fabric network in the storage system, and
reducing power consumption of the plurality of storage devices by adjusting bandwidths of internal interfaces between the fabric network and the plurality of storage devices based on (i) the calculated aggregate information of the bandwidths of the plurality of storage devices, and (ii) a bandwidth of an external interface between the host and the fabric network.

17. The power management method of claim 16 , wherein the reducing the power consumption of the plurality of storage devices includes,
adjusting the bandwidths of the internal interfaces such that the calculated aggregate information of the bandwidths of the in

Assignees

• Samsung Electronics Co Ltd

Inventors

• Woo Jung-Hyo
• Maeng Hyun-Joo
• Kang Jeong-Uk
• Baek I-Saac

Classifications

• G06F11/3409

  for performance assessment · CPC title

• G06F1/3275

  Power saving in memory, e.g. RAM, cache · CPC title

• G06F1/3209 Primary

  Monitoring remote activity, e.g. over telephone lines or network connections · CPC title

• G06F11/3062

  where the monitored property is the power consumption (power management in a computing system G06F1/3203) · CPC title

• G06F11/349

  for interfaces, buses · CPC title