Host recovery based on rapid indication of estimated recovery time

• US 9,563,512 B1
• Filed: 01/05/2016
• Issued: 02/07/2017
• Est. Priority Date: 01/05/2016
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Hardy, Clint A., Kalos, Matthew J., Powers, Bradley S.
• Primary Examiner(s): Mehrmanesh, Elmira
• Application Number:
  US14/987,896
• Time in Patent Office: 399 Days
• US Class Current: 1/1
• CPC Class Codes: G06F 11/00 Error detection; Error correction; Monitoring error detection, correction or monitoring in information storage based on relative movement between record carrier and transducer G11B20/18; monitoring, i.e. supervising the progress of recording or reproducing G11B27/36; in static stores G11C29/00
• CPC Class Codes: G06F 11/1415 at system level
• CPC Class Codes: G06F 11/3034 where the computing system component is a storage system, e.g. DASD based or network based digital input from or digital output to record carriers G06F3/06; digital recording or reproducing G11B20/18; for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS], H04L67/1097
• CPC Class Codes: G06F 11/3079 the data filtering being achieved by reporting only the changes of the monitored data
• CPC Class Codes: G06F 11/3419 by assessing time
• CPC Class Codes: G06F 2201/805 Real-time
• CPC Class Codes: G06F 3/0619 in relation to data integrity, e.g. data losses, bit errors
• CPC Class Codes: G06F 3/0629 Configuration or reconfiguration of storage systems
• CPC Class Codes: G06F 3/0683 Plurality of storage devices

Abstract

Various embodiments managing host recovery operations in a computing storage environment, by a processor device, are provided. Real-time indications are provided from a device to each of at least one of a plurality of hosts that a connected storage controller is entering a recovery operation, and real-time sense data is provided to the at least one of the plurality of hosts for presenting an indication of an expected recovery timeframe.

Claims

1. A method for managing host recovery operations in a computing storage environment, by a processor, comprising:

providing real-time indications from a device to each of at least one of a plurality of hosts that a connected storage controller is entering a recovery operation, and further providing real-time sense data to the at least one of the plurality of hosts for presenting a real-time indication of an expected recovery timeframe;

wherein providing the sense data includes pushing asynchronous notifications from the device to the at least one of the plurality of hosts;

presenting the sense data by the device to the at least one of the plurality of hosts once per enabled logical path, the enabled logical paths being provided by a bitmap;

providing notifications from the storage controller to the device of intermediate steps, which comprise checkpoints during a warmstart of the storage controller; and

monitoring, by the device, the checkpoints provided by notification by the storage controller;

wherein the checkpoints are either completed or failed by determination of a predetermined timeframe.

2. The method of claim 1, further including using the checkpoints, by the device, to provide the expected recovery timeframe by sense data to the at least one of the plurality of hosts.

3. The method of claim 1, wherein, for providing the expected recovery timeframe, the sense data contains one of a time value indication and a severity indication, the severity indication being cross-referenced with a table of time value indications.

4. The method of claim 1, further including notifying the at least one of the plurality of hosts when the recovery operation is completed.

5. A system for managing host recovery operations in a computing storage environment, the system comprising:

a processor; and

a device in communication with the processor, wherein the processor;

provides real-time indications from the device to each of at least one of a plurality of hosts that a connected storage controller is entering a recovery operation, and further provides real-time sense data to the at least one of the plurality of hosts for presenting a real-time indication of an expected recovery timeframe;

wherein the processor provides the sense data by pushing asynchronous notifications from the device to the at least one of the plurality of hosts;

wherein the processor presents the sense data by the device to the at least one of the plurality of hosts once per enabled logical path, the enabled logical paths being provided by a bitmap;

wherein the processor provides notifications from the storage controller to the device of intermediate steps comprising checkpoints during a warmstart of the storage controller; and

monitors, by the device, the checkpoints provided by notification by the storage controller;

wherein the checkpoints are either completed or failed by determination of a predetermined timeframe.

6. The system of claim 5, wherein the processor uses the checkpoints, by the device, to provide the expected recovery timeframe by sense data to the at least one of the plurality of hosts.

7. The system of claim 5, wherein, for providing the expected recovery timeframe, the sense data contains one of a time value indication and a severity indication, the severity indication being cross-referenced with a table of time value indications.

8. The system of claim 5, wherein the processor notifies the at least one of the plurality of hosts when the recovery operation is completed.

9. A computer program product for managing host recovery operations in a computing storage environment, by a processor, the computer program product embodied on a non-transitory computer-readable storage medium having computer-readable program code portions stored therein, the computer-readable program code portions comprising:

an executable portion that provides real-time indications from a device to each of at least one of a plurality of hosts that a connected storage controller is entering a recovery operation, and further provides real-time sense data to the at least one of the plurality of hosts for presenting a real-time indication of an expected recovery timeframe;

wherein providing the sense data includes pushing asynchronous notifications from the device to the at least one of the plurality of hosts;

an executable portion that presents the sense data by the device to the at least one of the plurality of hosts once per enabled logical path, the enabled logical paths being provided by a bitmap;

an executable portion that provides notifications from the storage controller to the device of intermediate steps comprising checkpoints during a warmstart of the storage controller; and

monitors, by the device, the checkpoints provided by notification by the storage controller;

wherein the checkpoints are either completed or failed by determination of a predetermined timeframe.

10. The computer program product of claim 9, further including an executable portion that uses the checkpoints, by the device, to provide the expected recovery timeframe by sense data to the at least one of the plurality of hosts.

11. The computer program product of claim 9, wherein, for providing the expected recovery timeframe, the sense data contains one of a time value indication and a severity indication, the severity indication being cross-referenced with a table of time value indications.

12. The computer program product of claim 9, further including an executable portion that notifies the at least one of the plurality of hosts when the recovery operation is completed.