VTL Application Arena iSCSI RAID speaker: Jeff Weng April, 2009.

VTL ApplicationVTL ApplicationArena iSCSI RAIDArena iSCSI RAID

speaker: Jeff Weng

April, 2009

2www.maxtronic.com.tw

AgendaAgenda VTL Application (PM 9:30~ 10:00) ->VTL Introduction ->VTL advantage -> VTL assortment iSCSI Product Introduction (PM 10:00~10:30)

->iSCSI RAID Specification->Software Feature: MPIO->Software Feature: Snapshot

Live Demo (PM 10:40~ 11:40)->SS-6603S or SA-4503S installed FalconStor VTL s

oftware Q & A (PM 11:40~ 12:00)


VTL IntroductionVTL Introduction Virtual Tape Library (VTL) is a data storage virtualization technology used t

ypically for accelerating backup and restore purposes.

VTL generally consists of a Virtual Tape appliance or server, and software which emulates traditional tape devices and formats. Data is deposited onto disk array drives just as it would onto a tape library.

Most current VTL solutions use SAS or SATA disk arrays as the primary storage component. The use of array enclosures increases the scalability of the solution by allowing the addition of more disk drives and enclosures to increase the storage capacity.

By backing up data to disks array instead of tapes, VTL often increases performance of both backup and recovery operations. the data stored on the VTL's disk array is exported to other media, such as physical tapes, for disaster recovery purposes. (scheme called D2D2T)


VTL Backup schemaVTL Backup schema D2T traditional disk to tape backup flow

D2D2T disk to disk to tape enhanced backup flow

250~350 MB/s

Great performance

speed up service

level Easy to load require

data Easy to have remote

backup / DR

1 Gb/s LAN

DatabaseApplication server

Backup server

Tape Library

• Slow down process

• Hard to retrieve data

• Difficult to enable DR

10~20 MB/s

Data from a backup server copied to

tape library

Fibre / iSCSI SANor NAS storage

Backup server

+ VTLTape Library

DatabaseApplication server

1 Gb/s LAN


VTL Advantage VTL Advantage D2T (Disk to Tape)D2T (Disk to Tape) D2D2T (Disk to Disk to Tape)D2D2T (Disk to Disk to Tape)

Type advantage disadvantage simulation application benefit

Disk

1. Read/write fast

2. record data validity

3. Random access

4. Fast data recovery

• High cost• fragile structure

VTL

the hard disk simulated into the tape, in order to make enterprise data recovery faster 。

based on the nature of the data ， the data separately put different speed and cost of storage media ，make VTL and tape can be complementary to each entity 。Tape

1. long-term preservation

2. low cost

• Read/write slow• Sequence access• Slow data recovery

Digital reservation

using tape simulation software into disk array to create the largest storage space 。


VTL TypeVTL Type Distinguished by VTL architecture

Backup software VTL (1st generation) Application Server VTL (2nd generation) Disk Array VTL (3rd generation)

Distinguished by demand environment

Type definition Vendor

Mainframe VTL suitable for large host virtual tape device IBM 、 Sun 、 Fujitsu Siemens 、 HDS

Open Systems VTL

Support mainframe 、 open system 。 And also support specific operation system 、 backup software 、 tape simulation and SAN network (FC 、 iSCSI 、 NAS)

EMC 、 Fujitsu Siemens 、 HDS 、 HP 、 NetApp


Backup Software typeBackup Software type

Architecture

The backup software integrated VTL software, in order to simply rely on software to achieve the tape simulation purpose

Advantage

As long as storage space is enough to

simulate tape cabinet quantity 、 tape

quantity and every capacity size of

tape.

DisadvantageUnable to use and match other brands software

vendor Bakbone 、 CA

Web ServerMail ServerDatabase

VTL Disk Array Backup Server

FC/SCSI

Architecture

LAN

VTL Software


Application Server typeApplication Server type

architecture

Through VTL software installed in PC server which provided internal disk capacity or external disk array space, and then make virtual tape space for backup data 。

advantage

1. costs are relatively cheap ： software architecture in a standard x 86 platform and Linux operating system 。

2. More flexible ： lower limit for storage equipment , as long as server adopt any SCSI 、 iSCSI or fibre interface of disk array connected with backup server which also support SCSI 、 iSCSI or fibre channel 。

vendor FalconStor 、 Sun 、 Maxxan

Customer base

Mostly small and medium business company

Fibre / iSCSI

Web ServerMail Server

Backup Server

LAN

Architecture

VTL Disk Array

Database

VTL Software


Disk Array typeDisk Array type

Architecture

Through simulation software which internal build-in RAID controller will make storage space simulate as tape library cabinet 。

advantage

Storage capacity is usually getting

above dozens of TB ， even up to

hundreds of TB 。

vendorEMC 、 HP 、 IBM Copan 、 Quantum 、 NetApp Sepaton

Customer base Mostly large enterprises company

Web ServerMail Server

LAN

Database

Backup ServerVTL Disk Array

FC/SCSI

VTL Software

Architecture


SA-6603S SS-6603S SS-4503S SA-4503S SA-4303S

Interface iSCSI to SATA II iSCSI to SATA II / SAS

iSCSI to SATA II / SAS

iSCSI to SATA II iSCSI to SATA II

Capacity 16 bay Rackmount 3U”

16 bay Rackmount 3U”




Memory UP to 2GB DDR II UP to 2GB DDR II UP to 2GB DDR II UP to 2GB DDR II UP to 2GB DDR II

CPU Intel XScale IOP80341

Intel XScale IOP80342




Controller Single Single Single Single Single

Host channels 2 4 4 2 2

Expansion port _ 1 1 _ _

iSCSI RAID systemiSCSI RAID system


SA series SS series

1. Snapshot and Rollback V (up to 32 snapshot volumes) V (up to 512 snapshot volumes)

2. Multiple RAID volume support V V

3. Online Volume Migration & Expansion V V

4. SES (SCSI Enclosure Service) Management V V

5. CHAP authentication V V

6. Link Aggregation or Trunking V V

7. SCSI-3 PR-command Compliant V V

8. BBM (Battery Backup Module) option V V

9. support hosts clustered for one volume V (up to 8 hosts clustered) V (up to 16 hosts clustered)

10. JBOD Expansion Port X V

iSCSI Product Introduction iSCSI Product Introduction Feature Highlight


PerformancePerformance

Server

Gigabit Switch

SS-6603S

Setting:

I/O meter key parameter: 1 Works,32 I/O outstanding,

512k request transfer size

Performance:

Sequential Read: 370 MB/s Sequential Write: 350 MB/s

Equipment:

1. HP NC360T PCI-Express Dual Port Gigabit and Intel Pro/1000PM PCI-E Gigabit dual port 2. Windows 2003R2 SP13. Microsoft software Initiator with MPIO


MPIO ConnectionMPIO ConnectionDual port with MPIO Dual port with MPIO

( host has 2 LAN port, Read or Write in One UDV )( host has 2 LAN port, Read or Write in One UDV )

Direct ConnectionDirect Connection Through Switching HUBThrough Switching HUB

Gigabit Switch

SA-4503S/SS-6603S

172.100.1.222172.100.1.233

172.100.1.210172.100.1.184

Host Host

SA-4503S/SS-6603S


A host with dual LAN ports connects

cables to SA-4503S or SS-6603S

Create VG and UDV mapping the host

Installing “Microsoft iSCSI initiator”, install MPIO driver at the same time

Logon to target separately on each port. When logon to target,

check ‘Enable multi-path’

START

MPIO mode can be selected on

Targets Details Devices Advanced

Select win2003 device manager to verify iSCSI disk

Then MPIO setting is done

END

MPIO configure flow chartMPIO configure flow chart


Snapshot FeatureSnapshot Feature

Copy-on-Write

– Copy “Difference” for a point-of-time Reserve 20% of UDV as snapshot space Up to 512 Snapshot volume on SS series Up to 32 Snapshot volume on SA series When Snapshot space is full,

– Full warning message,

– Replace the oldest Snapshot When delete Snapshot UDV, it will also delete older

Snapshot UDV related to it.


Snapshot function can be selected on

Volume config User data volumeSnapshot space

Input snapshot volume capacity,

Reserve 20% of UDV as snapshot space

Select UDV , and then press “Snapshot” button

Plan schedule , and when time up to

star to do snapshotScheduling?YES

No

Snapshot configure flow chartSnapshot configure flow chart

START

END


Before rollback, dismount file system first.

Select Volume config User data volume

press “Rollback” button

Select the snapshot UDV for rollback

Rollback configure flow chartRollback configure flow chart

START

END


Live Demo diagramLive Demo diagram


Installation Centos 5.1 64-bit Edition(kernel: 2.6.18-53.1.19.el5)

Installation VTL server software

Type command to connect SS-6603S

target volume

Installation VTL console for

management windows 2003

login server by console, and then

create virtual library

Create virtual tape library database

Create virtual tape driver & virtual tape

Make VTL server as iSCSI target

Use Microsoft Initiator to

mount target

Go to windows device manager to verify tape drives

Run windows Backup program (Start-->program-- >

system tools-- >backup)

VTL configuration flow chartVTL configuration flow chartSTART

END


Q & AQ & A Q1: What’s OS supported MPIO? A1: MS MPIO is not supported on Windows XP or 2000 Professional Edition. Using Win Server 2003 or Win 2000 server Edition.

Q2: Does SS and SA series support over 2TB? A2: Yes, both series support over 2TB. OS List – Windows Server 2003 Service Pack 1 (SP1) – Windows XP Professional x64 Edition (64 Bit) – Linux kernel 2.6.x or later version – FreeBSD 5.2.1 or later version

Q3: How much memory capacity could use snapshot function?

A3: At least 1GB RAM memory capacity.

VTL Application Arena iSCSI RAID speaker: Jeff Weng April, 2009.

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