EP1438808A2 - Classification des paquets dans un systeme de stockage - Google Patents

Classification des paquets dans un systeme de stockage

Info

Publication number
EP1438808A2
EP1438808A2 EP02768900A EP02768900A EP1438808A2 EP 1438808 A2 EP1438808 A2 EP 1438808A2 EP 02768900 A EP02768900 A EP 02768900A EP 02768900 A EP02768900 A EP 02768900A EP 1438808 A2 EP1438808 A2 EP 1438808A2
Authority
EP
European Patent Office
Prior art keywords
packet
data
packets
switch
linecard
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP02768900A
Other languages
German (de)
English (en)
Other versions
EP1438808A4 (fr
Inventor
Santosh C. Lolayekar
Yu-Ping Cheng
Anoop R. Hegde
Sunil K. Asthana
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EMC Corp
Original Assignee
Maranti Networks Inc
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 US10/051,093 external-priority patent/US7558264B1/en
Application filed by Maranti Networks Inc filed Critical Maranti Networks Inc
Publication of EP1438808A2 publication Critical patent/EP1438808A2/fr
Publication of EP1438808A4 publication Critical patent/EP1438808A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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]
    • 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

Definitions

  • a user may access its company's "engineering storage space,” ENG:, accessing and “seeing” the virtual space ENG: as he or she would access or "see” an attached disk drive. Nonetheless, the ENG: space maybe divided over several physical storage devices or even fragmented on a single storage device.
  • a server requests a virtual device (e.g., ENG:) and block number, the appliance must dete ⁇ nine the device(s) that physically correlate to the virtual device requested and direct the data accordingly.
  • SANs are formed using a single protocol to interconnect the devices. Although Fibre Channel is the most commonly used, Ethernet connections have also been used.
  • Figs. 12a is a flow diagram illustrating a classification process of FCP frames in the ingress direction as the process occurs in the PACE, in accordance with an embodiment of the invention
  • Fig.20 is a flow diagram illustrating a virtualization process in the ingress direction for read data packets or frames, in accordance with an embodiment ofthe invention
  • Fig. 25 is a flow diagram illustrating the steps taken for the storage service of inirroring over a slow link in accordance with an embodiment ofthe invention
  • Fig. 26 is a flow diagram illustrating the steps taken for the storage service of snapshot in accordance with an embodiment ofthe invention
  • Fig. 27 is a flow diagram illustrating the steps taken for the storage service of cloning in accordance with an embodiment ofthe invention
  • Fig. 28 is a flow diagram illustrating the steps taken for the storage service of third party copy in accordance with an embodiment ofthe invention.
  • FIG.5 shows still another embodiment ofa system in accordance with the invention wherein switches 304 are coupled directly to one another, hi any ofthe embodiments shown in Figs. 3 or 4, if more than one switch is used, those switches could be coupled as illustrated in Fig. 5.
  • a storage switch in accordance with the invention enables a centralized management of globally distributed storage devices, which can be used as shared storage pools, instead ofhaving a huge number of management stations distributed globally and an army of skilled management personnel.
  • Such a storage switch is an "intelligent" switch, and, as can be seen by comparing Fig. 3 to Fig. 1, the functions of switch, appliance, and gateway have effectively been united in a storage switch 304 in accordance with an embodiment ofthe invention.
  • the PACE 704 aggregates two 1 Gb ports into a single 2Gb data channel.
  • the PACE classifies each received packet into a control packet or a data packet, as will be discussed further below.
  • Control packets are sent to the CPU 714 for processing, via bridge 716.
  • Data packets are sent to a Packet Processing Unit (PPU) 706, discussed below, with a local header added.
  • PPU Packet Processing Unit
  • the local header is sixteen bytes resulting in a data
  • the Buffer Offset and Data Transfer Length fields can be mapped directly from the FCP XFR_RDY frame.
  • other fields such as StatSN, ExpCmdSN, MaxCmdSN, and R2TSN must be taken from the ITCB.
  • variables like task tags unique to the iSCSI R2T PDU are also placed in the packet by the PPU, usually using fields from the PTD or VTD.
  • the iSCSI initiator Afterreceiving anR2T, the iSCSI initiator will send a Write DataPDU, which must be translated to an FCP Data IU:

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)

Abstract

Dans un mode de réalisation de l'invention, un commutateur de stockage présente un degré élevé d'échelonnabilité qui permet la création d'un SAN facile à déployer et pouvant être géré à partir d'un centre. En outre, ce commutateur de stockage permet également le déploiement d'une infrastructure mondiale et, partant, de disposer des ressources du SAN telles que les dispositifs de stockage dans n'importe quel point du globe. De plus, ce commutateur de stockage permet un SAN à protocoles multiples, p. ex. celui qui permet iSCSI ou Fibre Channel, et traite les paquets de données sans ralentissement ('wire speed'). Pour faciliter davantage le traitement sans ralentissement, on a muni le commutateur de l'invention d'une 'intelligence' répartie entre toutes ses cartes de ligne lui permettant de classer les paquets en paquets de données et paquets de contrôle et remplit les fonctions de virtualisation et celles de traduction de protocole. Un commutateur de l'invention fournit en outre des services de stockage sans serveur tels que la création de miroirs, le dépistage sélectif et la réplication.
EP02768900A 2001-09-28 2002-09-27 Classification des paquets dans un systeme de stockage Withdrawn EP1438808A4 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US51093 1993-04-21
US32570401P 2001-09-28 2001-09-28
US325704P 2001-09-28
US10/051,093 US7558264B1 (en) 2001-09-28 2002-01-18 Packet classification in a storage system
PCT/US2002/030557 WO2003030431A2 (fr) 2001-09-28 2002-09-27 Classification des paquets dans un systeme de stockage

Publications (2)

Publication Number Publication Date
EP1438808A2 true EP1438808A2 (fr) 2004-07-21
EP1438808A4 EP1438808A4 (fr) 2007-05-23

Family

ID=26729050

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02768900A Withdrawn EP1438808A4 (fr) 2001-09-28 2002-09-27 Classification des paquets dans un systeme de stockage

Country Status (3)

Country Link
EP (1) EP1438808A4 (fr)
JP (1) JP2005505819A (fr)
WO (1) WO2003030431A2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE387069T1 (de) 2003-05-09 2008-03-15 Motorola Inc VERFAHREN UND VORRICHTUNG ZUR KONTROLLE DES ZUGRIFFS AUF ßMULTIMEDIA BROADCAST MULTICAST SERVICEß IN EINEM PAKETDATENKOMMUNIKATIONSSYSTEM
JP4438457B2 (ja) 2003-05-28 2010-03-24 株式会社日立製作所 記憶領域割当方法、システム及び仮想化装置
JP4646574B2 (ja) 2004-08-30 2011-03-09 株式会社日立製作所 データ処理システム
JP2006107450A (ja) * 2004-09-30 2006-04-20 Emc Corp トライアングル非同期複製（ｔｒｉａｎｇｕｌａｒａｓｙｎｃｈｒｏｎｏｕｓｒｅｐｌｉｃａｔｉｏｎ）
US20080172532A1 (en) * 2005-02-04 2008-07-17 Aarohi Communications , Inc., A Corporation Apparatus for Performing and Coordinating Data Storage Functions
JP5057656B2 (ja) 2005-05-24 2012-10-24 株式会社日立製作所 ストレージシステム及びストレージシステムの運用方法
GB2450148A (en) * 2007-06-14 2008-12-17 Advanced Risc Mach Ltd Controlling write transactions between initiators and recipients via interconnect logic

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001059966A1 (fr) * 2000-02-08 2001-08-16 Nishan Systems, Inc. Procede et dispositif de transfert de donnees entre differentes unites de reseau a travers un reseau ip

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6304578B1 (en) * 1998-05-01 2001-10-16 Lucent Technologies Inc. Packet routing and queuing at the headend of shared data channel
US6400730B1 (en) * 1999-03-10 2002-06-04 Nishan Systems, Inc. Method and apparatus for transferring data between IP network devices and SCSI and fibre channel devices over an IP network
EP1370947A4 (fr) * 2001-02-13 2009-05-27 Candera Inc Serveur de virtualisation et de stockage sur silicium

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001059966A1 (fr) * 2000-02-08 2001-08-16 Nishan Systems, Inc. Procede et dispositif de transfert de donnees entre differentes unites de reseau a travers un reseau ip

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO03030431A2 *

Also Published As

Publication number Publication date
JP2005505819A (ja) 2005-02-24
WO2003030431A2 (fr) 2003-04-10
EP1438808A4 (fr) 2007-05-23
WO2003030431A3 (fr) 2003-07-03

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