WO2005104731A3 - Reactive deadlock management in storage area networks - Google Patents

Reactive deadlock management in storage area networks Download PDF

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Publication number
WO2005104731A3
WO2005104731A3 PCT/US2005/014335 US2005014335W WO2005104731A3 WO 2005104731 A3 WO2005104731 A3 WO 2005104731A3 US 2005014335 W US2005014335 W US 2005014335W WO 2005104731 A3 WO2005104731 A3 WO 2005104731A3
Authority
WO
WIPO (PCT)
Prior art keywords
command
target
storage area
transfer ready
physical
Prior art date
Application number
PCT/US2005/014335
Other languages
French (fr)
Other versions
WO2005104731A2 (en
Inventor
Robert Tower Frey
Chao Zhang
Original Assignee
Emc Corp
Robert Tower Frey
Chao Zhang
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US10/833,457 external-priority patent/US7484058B2/en
Priority claimed from US10/833,438 external-priority patent/US20050262309A1/en
Application filed by Emc Corp, Robert Tower Frey, Chao Zhang filed Critical Emc Corp
Publication of WO2005104731A2 publication Critical patent/WO2005104731A2/en
Publication of WO2005104731A3 publication Critical patent/WO2005104731A3/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
    • G06F11/2053—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where persistent mass storage functionality or persistent mass storage control functionality is redundant
    • G06F11/2056—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where persistent mass storage functionality or persistent mass storage control functionality is redundant by mirroring
    • G06F11/2058—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where persistent mass storage functionality or persistent mass storage control functionality is redundant by mirroring using more than 2 mirrored copies
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
    • G06F11/2053—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where persistent mass storage functionality or persistent mass storage control functionality is redundant
    • G06F11/2056—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where persistent mass storage functionality or persistent mass storage control functionality is redundant by mirroring
    • G06F11/2069—Management of state, configuration or failover
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
    • G06F11/2053—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where persistent mass storage functionality or persistent mass storage control functionality is redundant
    • G06F11/2056—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where persistent mass storage functionality or persistent mass storage control functionality is redundant by mirroring
    • G06F11/2071—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where persistent mass storage functionality or persistent mass storage control functionality is redundant by mirroring using a plurality of controllers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
    • G06F3/0671—In-line storage system
    • G06F3/0673—Single storage device
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/1097—Protocols in which an application is distributed across nodes in the network 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]

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Computer And Data Communications (AREA)
  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)

Abstract

Systems and methods to detect and alleviate potential or actual deadlock of a storage switch or storage area network when attempting to write data to a mirrored virtual target. In accordance with one embodiment, a timer is started when a storage switch routes a write command to the physical targets corresponding to a virtual target of the write command (1404). If each physical target does not return a transfer ready signal resource within a predetermined time period, the switch determines that a potential or actual deadlock has occurred (1406), An abort command is sent to each of the physical devices (1408). The abort command can clear the command from the targets and also free any allocated transfer ready resources (1410 and 1412). In one embodiment, a queue depth for the virtual target can be lowered after failing to receive transfer ready resources form each target (1414).
PCT/US2005/014335 2004-04-28 2005-04-26 Reactive deadlock management in storage area networks WO2005104731A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US10/833,457 2004-04-28
US10/833,457 US7484058B2 (en) 2004-04-28 2004-04-28 Reactive deadlock management in storage area networks
US10/833,438 2004-04-28
US10/833,438 US20050262309A1 (en) 2004-04-28 2004-04-28 Proactive transfer ready resource management in storage area networks

Publications (2)

Publication Number Publication Date
WO2005104731A2 WO2005104731A2 (en) 2005-11-10
WO2005104731A3 true WO2005104731A3 (en) 2007-05-24

Family

ID=35242147

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/US2005/014335 WO2005104731A2 (en) 2004-04-28 2005-04-26 Reactive deadlock management in storage area networks
PCT/US2005/014307 WO2005104727A2 (en) 2004-04-28 2005-04-26 Proactive transfer ready resource management in storage area networks

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/US2005/014307 WO2005104727A2 (en) 2004-04-28 2005-04-26 Proactive transfer ready resource management in storage area networks

Country Status (1)

Country Link
WO (2) WO2005104731A2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5666559A (en) * 1994-04-06 1997-09-09 Advanced Micro Devices Fail-safe communication abort mechanism for parallel ports with selectable NMI or parallel port interrupt
US7013336B1 (en) * 1999-03-31 2006-03-14 International Business Machines Corporation Method and structure for efficiently retrieving status for SCSI accessed fault-tolerant enclosure (SAF-TE) systems

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6341315B1 (en) * 1999-02-26 2002-01-22 Crossroads Systems, Inc. Streaming method and system for fiber channel network devices
US20030079018A1 (en) * 2001-09-28 2003-04-24 Lolayekar Santosh C. Load balancing in a storage network

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5666559A (en) * 1994-04-06 1997-09-09 Advanced Micro Devices Fail-safe communication abort mechanism for parallel ports with selectable NMI or parallel port interrupt
US7013336B1 (en) * 1999-03-31 2006-03-14 International Business Machines Corporation Method and structure for efficiently retrieving status for SCSI accessed fault-tolerant enclosure (SAF-TE) systems

Also Published As

Publication number Publication date
WO2005104727A2 (en) 2005-11-10
WO2005104727A3 (en) 2009-05-28
WO2005104731A2 (en) 2005-11-10

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