Storage system with trace-based management

Patent metadata

Field	Value
Publication number	US-2016004618-A1
Application number	US-201414321924-A
Country	US
Kind code	A1
Filing date	Jul 2, 2014
Priority date	Jul 2, 2014
Publication date	Jan 7, 2016
Grant date	—

Abstract

Embodiments of the invention relate to storage systems, and for recording event records into a log. Different statistics may be tallied from the log, with the different statistics generating different statistical measurements. The aspect of processing of I/O and preparation of statistical measurements are separated, thereby enabling data structures and algorithms which would not be considered feasible for use as part of I/O processing, because they may compromise the performance or other essential characteristic of I/O processing, to be employed.

First claim

We claim:

1 . A method comprising:
processing an I/O transaction and recording transaction metadata into a log, wherein the log includes a subset of two or more transaction operations; operating a summarizer upon the log to generate a statistical measurement; and using the statistical measurement, selecting one or more parameter values for supporting a decision about a parameter setting.

2 . The method of claim 1 , wherein the log contains a record of a representative subset of transactions within a designated category performed in a time window.

3 . The method of claim 1 , further comprising replacing the summarizer while maintaining recordation of the transaction metadata into the log.

4 . The method of claim 3 , further comprising deploying a new statistical measurement from the replaced summarizer.

5 . The method of claim 1 , further comprising the summarizer being a query language that parameterizes an associated query of the event log.

6 . The method of claim 5 , further comprising an external stimulus activating the summarizer.

7 . A computer program product for generating a statistical measurement and application of the measurement to a parameter setting, the computer program product comprising a computer readable storage device having program code embodied therewith, the program code executable by a processing unit to:
process an I/O transaction and record transaction metadata into a log, wherein the log includes a subset of two or more transaction operations; operate a summarizer upon the log to generate a statistical measurement; and use the statistical measurement, including selection of one or more parameter values to support a decision about a parameter setting.

8 . The computer program product of claim 7 , wherein the log contains a record of a representative subset of transactions within a designated category performed in a time window.

9 . The computer program product of claim 7 , further comprising code to replace the summarizer while maintaining recordation of the transaction metadata into the log.

10 . The computer program product of claim 9 , further comprising code to deploy a new statistical measurement from the replaced summarizer.

11 . The computer program product of claim 7 , further comprising the summarizer being a query language that parameterizes an associated query of the event log.

12 . The computer program product of claim 11 , further comprising an external stimulus to activate the summarizer.

13 . A system comprising:
a storage system, including a server having a processing unit operatively coupled to memory, the server in communication with an I/O engine; a handler in communication with the processing unit, the handler to process an I/O transaction and record transaction metadata into a log, wherein the log includes a subset of two or more transaction operations; a summarizer in communication with the handler, the summarizer to utilize the metadata in the log to generate a statistical measurement; and the handler to use the statistical measurement, including selection of one or more parameter values to support a decision about a parameter setting.

14 . The system of claim 13 , wherein the log contains a record of a representative subset of transactions within a designated category performed in a time window.

15 . The system of claim 13 , further comprising the handler to replace the summarizer while maintaining recordation of the transaction metadata into the log.

16 . The system of claim 15 , further comprising the handler to deploy a new statistical measurement from the replaced summarizer.

17 . The system of claim 13 , further comprising the summarizer being a query language that parameterizes an associated query of the event log.

18 . The system of claim 17 , further comprising an external stimulus to activate the summarizer.

Assignees

• IBM

Inventors

• Chambliss David D
• Helman Haim
• Rodeh Ohad

Classifications

• G06F11/3452

  Performance evaluation by statistical analysis · CPC title

• G06F11/3409

  for performance assessment · CPC title

• G06F11/3034 Primary

  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 title

• G06F2201/87

  Monitoring of transactions · CPC title

• G06F2201/86

  Event-based monitoring · CPC title