3par Presentation.ppt 363i5

Storage Area Network (SAN)

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Outline

• Direct Access Storage (DAS) • Network Attached Storage (NAS) • Storage Area Network (SAN) – Fiber Channel Switch

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The SNIA storage model A layered view

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Three Basic Forms of Network Storage • Direct access storage (DAS) • Network attached storage (NAS) • Storage area network (SAN)

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DAS

NAS

FC-SAN

clien ts servers FC Switch

storage Serving Information

SCSI Distribution Architecture • SCSI is a client/server architecture. • The client is called the initiator and issues request to the server. The client is I/O subsystem under the typical OS control. • The “server” is called the target, which is the SCSI controller inside the storage device. It receives, process, and responds to the requests from the initiator. • SCSI commands block I/O, transferring large amount of data in blocks.

Client (Initiator)

request response Serving Information

Storage Dev (Target)

SCSI Client/Server Architecture

Server

Client (Host)

(Storage Device)

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Redundant Array of Independent Disks (RAID) • A group of hard disks is called a disk array • RAID combines a disk array into a single virtual device – called RAID drive

• Provide fault tolerance for shared data and applications • Different implementations: Level 0-5 • Characteristics: – Storage Capacity – Speed: Fast Read and/or Fast Write – Resilience in the face of device failure

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RAID Types • RAID 0 – Stripe with no parity (see next slide for figure)

• RAID 1 – Mirror two or more disks

• RAID 0+1 (or 1+0) – Stripe and Mirrors

• RAID 3 – Synchronous, Subdivided Block Access; Dedicated Parity Drive

• RAID 5 – Like RAID 4, but parity striped across multiple drives Serving Information

RAID 0

RAID 1

Disk Striping (no redundancy) Disk Mirror Serving Information

RAID 0+1 (or 1+0)

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RAID 3

RAID 5

Disk striping with Dedicated Parity Drive Disk striping with Distributed Par

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Striping (parity) data is duplicate. Serving Information

Network Attached Storage (NAS) • NAS is adedicated storage device, and it operates in a client/server mode. • NAS is connected to the file server via LAN. • Protocol: NFS (or CIFS) over an IP Network – Network File System (NFS) – UNIX/Linux – Common Internet File System (CIFS) – Windows Remote file system (drives) mounted on the local system (drives) – SAMBA: SMB on Linux (Making Linux a Windows File Server)

• Advantage: no distance limitation • Disadvantage: Speed and Latency • Weakness: Security Serving Information

Network Attached Storage (NAS) •

Specialized storage device or group of storage devices providing centralized fault-tolerant data storage for a network

Clients

Servers

Storage Devic

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Storage Area Network (SAN)

• A Storage Area Network (SAN) is a specialized, dedicated high speed network ing servers and storage, including disks, disk arrays, tapes, etc. • Storage (data store) is separated from the processors (and separated processing). • High capacity, high availability, high scalability, ease of configuration, ease of reconfiguration. • Fiber Channel is the de facto SAN networking architecture, although other network standards could be used. Serving Information

SAN Benefits • • • • • • • • • •

Storage consolidation Data sharing Non-disruptive scalability for growth Improved backup and recovery High performance High availability server clustering Data integrity Disaster tolerance Ease of data migration Cost-effectives (total cost of ownership)

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NAS vs. SAN ? • Traditionally: – NAS is used for low-volume access to a large amount of storage by many s – SAN is the solution for terabytes (1012) of storage and multiple, simultaneous access to files, such as streaming audio/video. • The lines are becoming blurred between the two technologies now, and while the SAN-versus-NAS debate continues, the fact is that both technologies complement each another.

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SAN Topologies • Fibre Channel based networks three types of topologies: – Point-to-point – Loop (arbitrated) – shared media – Switched

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Switched FC SAN • Fibre Channel-switches function in a manner similar to traditional network switches to provide increased bandwidth, scalable performance, an increased number of devices, and, in some cases, increased redundancy. Fibre Channel-switches vary in the number of ports and media types they . • Multiple switches can be connected to form a switch fabric capable of ing a large number of host servers and storage subsystems

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FC – Switched SAN

Servers

Fiber Chann Switch Clients Serving Information

Fiber C Stores

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3PAR Hardware Overview

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3PAR InServ Storage Servers Scalability F200

F400

T400

T800

2

2–4

2–4

2–8

Yes

Yes

Yes

Yes

0 – 12 0–8 2

0 – 24 0 – 16 2–4

0 – 64 0 – 16 2–4

0 – 128 0 – 32 2–8

8 12

8-16 12-24

8-16 24-48

8-32 24-96

Disk Drives

16 - 192

16 - 384

16 – 640

16 – 1,280

Drive Types

146GB, 300GB, 400GB FC and/or 1TB NL

146GB, 300GB, 400GB FC and/or 1TB NL

146GB, 300GB, 400GB FC and/or 750GB, 1TB NL

146GB, 300GB, 400GB FC and/or 750GB, 1TB NL

125TB

250TB

300TB

600TB

1,300 (MB/s) / 46,800

2,600 (MB/s) / 93,600

3,200 (MB/s) / 156,000

6,400 (MB/s) / 312,000

Controller Nodes 3PAR Gen3 ASIC Fibre Channel Host Ports Optional iSCSI Host Ports Built-in Remote Copy Ports GBs Control Cache GBs Data Cache

Max Capacity Throughput/ IOPS (from disk) SPC-1 Benchmark Results

SPC-1 TBD

224,990 SPC-1 IOPS

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3PAR InSpire architecture: Cabinet Redundant Power Supplies (Drive Cage)

Cabinet • Standard 19” rack footprint • 40 EIA units • Built-in cable management • No Need to reserve for expansion

Drive Chassis (4U)

Redundant Power Supplies

Drive Magazine

Backplane Controller Node (4U)

Redundant Batteries Redundant PDUs

Service Processor

Cabinet

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3PAR F-Class Architecture Basics •

Same underlined architecture as the TClass – tailored for the midrange – Cache coherent & massively load balanced – Mixed workload & Fast RAID – Thin Built In

•

Same advanced 3PAR software as in the T-Class – – – – –

InForm OS Thin Provisioning & Virtual Copy Dynamic Optimization Virtual Domains Remote Copy (connect to other InServ models)

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3PAR InServ F-Class Storage Server Specifications F-Class Controllers (Rearview)

4U

Integrated Power Supply & Battery

Optional Adapter Slots

Integrated Power Supply & Battery

Built-in GigE port for Remote Copy

Built-in Fibre Channel (4Gb/s) ports

F-Class Drive Chassis (frontview)

3U

HDD

HDD

HDD

HDD

HDD

HDD

HDD

HDD

HDD

HDD

HDD

HDD

HDD

HDD

HDD

HDD

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3PAR InServ F-Class Storage Server Specifications • • • •

F-Class Controllers (Rearview)

4U

Integrated Power Supply & Battery

Optional Adapter Slots

Integrated Power Supply & Battery

Built-in GigE port for Remote Copy

Built-in Fibre Channel (4Gb/s) ports

F-Class Drive Chassis (frontview)

3U

HDD

HDD

HDD

HDD

HDD

HDD

HDD

HDD

HDD

HDD

HDD

HDD

HDD

HDD

HDD

HDD

•

• •

• • • • •

One Xeon Quad-Core 2.33GHz U per node One 3PAR Gen3 ASIC per node 4GB Control & 6GB Data Cache per node Built-in I/O ports per node – 4 FC (4Gb/s) ports (host or backend connectivity) – Gigabit Ethernet port for Remote Copy Optional I/O adapter slots per node – Up to 2 slots per node (or up to 4 more FC and/or iSCSI ports per node 4U Form Factor Cabinet Options: 2M Cabinet or 3 rd party rack mountable

4Gb/sec internally switched FC Drive Chassis 16 drives in 3U Up to 384 drives across 24 Drive Chassis Mixable FC and Nearline drives Cabinet Options: 2M Cabinet or 3 rd party rack mountable

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3PAR Virtual Volume (VV) Concepts

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Objectives:

– Understand InForm OS RAID concepts

– Understand concepts of InServ Chunklets

– Understand InForm OS Logical Disks (LDs)

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InServ Concepts for Volume Management Section Content covers: – – – – – –

InServ Chunklet/Physical disk InServ RAID 1 InServ RAID 5 InServ RAID MP (RAID 6) Virtual Volumes, VLUNS (LUNS) Logical disks (LDs)

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Physical Disk – Chunklets (256 MB) Physical Disk C = 256 MB Data Chunklet SC

= 256 MB Spare Chunklet

C C

Each InServ Physical disk is initialized with data chunklets and spare chunklets.

SC

C

C C

SC

C

SC

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3PAR RAID 1 Concepts • RAID 1 is “mirrored” data • Data is written as “paired” chunklets • Each “chunklet” on the RAID set is on a different physical disk Setsize = 2 Default size (RAID 1)

C

C

Usable space = 256 MB

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3PAR RAID 5 Concepts • RAID 5 uses parity to reconstruct data • RAID 5 uses a setsize of 4 by default Setsize = 4 (3+1) C

C

C

p

C

C

p

C

C

p

C

C

Default size (RAID 5) Usable space = 768 MB (3*256)

Setsize = 6 (5+1) C

C

C

c

c

p

Usable space = 1280 MB

(5*256)

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3PAR RAID 5 Concepts Cont’d

C

C

C

C

C

C

c

c

p

Setsize = 9 (8+1) What is the usable space for this setsize?

Usable space = 2048 MB (8*256)

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3PAR RAID Multi Parity (MP) Concepts • RAID MP uses parity (double parity – can deliver data in a double disk failure) to reconstruct data and performed in the ASIC XOR engine • RAID MP only s two setsizes ( 8 and 16) • The default set size of 8 has the same data to parity ratio as the default RAID-5 set size of 4 -- 3:1 in both cases.

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Usage – Meaning of “-ha cage” For RAID MP • The system defines "-ha cage" as "will tolerate the failure of ONE cage”. This means: – Up to two chunklets are allowed to share the same cage. – The default R6 “-ha cage” set size 8 requires 4 cages per nodepair, just like the default R5 set size 4. – If 8 cages are available, the layout will use one chunklet per cage. – The same rules apply to “-ha mag” – up to two chunklets are allowed per mag but the system will place only one chunklet per mag if possible.

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3PAR Volume Management View

Physical Disks

Chunklets

Logical disks

Virtual Volumes

OLTP

D.W.

• The

3PAR InForm OS manages the above automatically

3PAR VM manages and presents volumes to server farms

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3PAR InServ Virtual Volume

The only storage component visible to Hosts

Virtual Volume

Host Sees Virtual Volume as a LUN

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Building a Virtual Volume

• Starts with Physical drives

Chunklets

Physical Drive

• Divided into “Chunklets”

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Chunklets: Foundation of Virtual Volume

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40

Start with a Raid Set as the Building Block

Raid 5 (4+1) Raid Set

• Chunklets: – Selected from separate physical drives – Selected from separate chassis

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Logical Disk • A collection of physical disk chunklets (256 MB) • Arranged as rows of RAID sets • Each RAID set is made up of chunklets from different physical disks • A chunklet can only be assigned to one logical disk

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InServ Virtual Volume For RAID 5

Virtual Volume

6 GB VV

C = 256 MB Chunklet 3072 MB per Node/LD

Node

Node

Logical Disk

Logical Disk

3072 MB per Node/LD

1

C

C

C

P

1

C

C

C

P

2

C

C

P

C

2

C

C

P

C

3

C

P

C

C

3

C

P

C

C

4

P

C

C

C

4

P

C

C

C

4 RAID Sets * 768 MB usable data = 3072 MB

RAID Set

RAID Set

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Default InServ Layout of 2 Node 6 GB Logical Disk •

InServ will place “chunklets” on separate physical disks

•

InServ will insure physical disks are on separate drive magazines

•

InServ will try to have each drive magazine on a separate drive chassis

•

InServ will try to make each Logical Disk owned by each node the same size

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Serving Information™. Simply. 3PAR Virtual Copy

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3PAR Virtual Copy

A snapshot of another Virtual Volume (a base volume or another Virtual Copy) created using copy-on-write techniques available only with a 3PAR Virtual Copy license.

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Virtual Copy Relationships • Virtual Copy can be read-only or read/write • The rules that enforce relationships between a base volume and its Virtual Copy revolve around read-only or read/write • Read-only and read/write (up to 256) Can make as many R/W VCs per R/O as needed. Base volumes are always read/write

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Virtual Copy Relationships Cont’d • A read-only copy can have up to 256 read/write Virtual Copys • A read/write Virtual Copy can have many read-only copies

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Virtual Copy Relationships Cont’d • The following shows a more complex relationship scenario

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Virtual Copy – Copy-on-Write Function (Data Written)

Snapshot (SA) Space Timestamp 5/25/06 14:35 1.

Pointer to data

2.

P

3.

P

4.

P

Base Volume 1. A 2. B 3. C

4. D

4. D’ D Copy-on-write to SD

New Write Data

4. D’

5. E 6. F

Snapshot Data (SD) Space – Stores Original Base Volume changes

7. G

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3PAR Dynamic Optimization

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Objectives

– – – – –

Explain the benefits of Dynamic Optimization (DO) Change Volume RAID level Change Volume Availability level Change Volume Service level Reclaim Unused LD Space

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3PAR Dynamic Optimization

An optional InForm OS feature that enables you to dynamically tune volumes by changing volume parameters. 3PAR Dynamic Optimization (DO) requires the use of the InForm CLI and also requires a 3PAR Dynamic Optimization license

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3PAR Dynamic Optimization A Software Solution that offers:

• A Single-command for online and nondisruptive service level optimization • A cost-effective approach to manage a massive scalable tiered storage array • Flexibility for all stages of the disk-based data lifecycle Serving Information 3PAR Company Confidential

Dynamic Optimization - Data Service Level Control

RAID Type • RAID 10 • RAID 50 (2 to 8+1)

System Resource Application

Massive versus restricted use of: • drives • processors

Radial Placement Selection of inner versus outer tracks on disk platters

Drive Type Various sizes and speeds of FC or Nearline

• ports / loops Serving Information 3PAR Company Confidential

3PAR Dynamic Optimization Benefit For Storage istration

• Allows for a non-disruptive re-layout of Virtual Volumes on the 3PAR InServ (move volumes to different physical disks to accommodate new demands)

• Promotes system optimization through improved utilization of all physical resources for the current configuration (Take advantage of a H/W upgrade)

• Allows for altering of “service levels” associated to a Virtual Volume (change RAID levels, set sizes, spare chunklets) Serving Information 3PAR Company Confidential

Dynamic Optimization – Potential Uses 1. Proactively ensure data service levels during expected peak demand periods (Quarter End, Holiday Shopping Season, High volume trading days) Unused Buffer

App A (RAID 5)

App B (RAID 5)

Unused Buffer

App A (RAID 10)

App C (RAID 5)

Normal Period

App B (RAID 5)

Unused Buffer

App A (RAID 5)

App C (RAID 5)

Peak Period

App B (RAID 5)

App C (RAID 5)

Normal Period

2. Meet service level or SLA change orders on demand. Silver

Gold Greater Revenue

Performance, Port Resources

Platinum Greater Revenue

Spindle, Loop Resources

RAID 50 (7+1) Restricted resources

RAID 50 (3+1) Greater resources

RAID 10 Striped massively

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Dynamic Optimization – Potential Uses 3. Deliver the required service levels for the lowest possible cost throughout the data lifecycle 50% Savings

10TB Useable

RAID 10 147GB FC Drives

80% Savings*

RAID 50 (3+1) 300GB FC Drives

RAID 50 (7+1) 500GB ATA-Class Drives

4. Accommodate rapid or unexpected, application growth on demand by freeing raw capacity + 7.5 Useable TBs 10 Useable TBs 20 Raw TBs, RAID 10

10 Useable TBs

Create 7.5 TBs of useable capacity on demand !

20 Raw TBs, RAID 50

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3PAR Dynamic Optimization at a Customer Free

Before Dynamic Optimization

Used 600

Data layout after a series of capacity upgrades

500

Chunklets

400 300 200

Free

After Dynamic Optimization 100

Used 600

0 1

20

39

58

77

500

96

Physical Disks

Data layout after Dynamic Optimization (non-disruptive)

Chunklets

400 300 200 100 0 1

20

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39

58

77

Physical Disks 3PAR Company Confidential

96

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Thank You

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