VTL Application Arena iSCSI RAID speaker: Jeff Weng April, 2009.
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Transcript of VTL Application Arena iSCSI RAID speaker: Jeff Weng April, 2009.
VTL ApplicationVTL ApplicationArena iSCSI RAIDArena iSCSI RAID
speaker: Jeff Weng
April, 2009
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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)
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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)
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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
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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 。
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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
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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
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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
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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
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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”
12 bay Rackmount 2U”
12 bay Rackmount 2U”
8 bay Rackmount 2U”
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
Intel XScale IOP80342
Intel XScale IOP80341
Intel XScale IOP80341
Controller Single Single Single Single Single
Host channels 2 4 4 2 2
Expansion port _ 1 1 _ _
iSCSI RAID systemiSCSI RAID system
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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
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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
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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
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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
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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.
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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
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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
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Live Demo diagramLive Demo diagram
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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
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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.
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