SAN Introduction – Day2

Agenda

Thin and Thick Provisioning

Deduplication

High Availability

Virtualization

LUN assignment

Networking

Zoning

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Thin Provisioning

Definition-:A thin-provisioned volume is

a volume for which storage is not set

aside up-front. Instead, the storage for

the volume is allocated as it is needed.

Thick Provisioning

Definition-: In virtual storage,

thick provisioning is a type of

storage allocation in which the

amount of storage capacity on a

volume is pre-allocated on

physical storage (aggregate) at

the time the volume is created.

NetApp Deduplication

Deduplication refers to the elimination

of redundant data in the storage. In

the deduplication process, duplicate

data is deleted, leaving only one copy

of the data to be stored. However,

indexing of all data is still retained

should that data ever be required. De-

duplication is able to reduce the

required storage capacity since only

the unique data is stored.

Introduction

ofStorage Area Network

High Availability

High availability means the

amount of time the network

services and data are accessible.

In many enterprises ensuring

data availability at any time and

at any place is the highest

priority.

Benefits of HA

Data access at anytime

Nondisruptive OS upgrade and hardware upgrade

The nondisruptive upgrade method can be used to replace or upgrade the following components

1.The storage system

2.Motherboard

3.Adapters

4.Nonvolaile RAM(NVRAM)

5.Disks

6.Other network interface components

Multi-Tenancy; What is it?

Shared infrastructure: hardware and

software

Administrative isolation and control

Supporting multiple “tenants” (users,

customers, etc.) from single shared

infrastructure while keeping all data isolated

and secure

Customers concerned with security and

privacy require secure multi-tenancy

– Government agencies

– Financial companies

– Service Providers

– Etc.

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Secure Multi-tenancy for virtualized environments

SolutionThe only validated solution to support end

to end multitenancy across application and

data

Data is securely isolated from virtual server,

network, to virtual storage

Introducing MultiStore

Creates multiple system partitions (vFiler units)

on a single NetApp storage system.

Each vFiler unit is secure (Data owned by one

vFiler unit can’t be accessed by any other vFiler

unit though they are hosted on a same physical

storage system)

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Multistore and VfilerA logical partition of N/W and storage resource in Data ONTAP called multistore and it provides a

secure storage consolidation solution.

When enabled, the Multistore license creates a logical unit called vFiler0 which contains all of the

storage and network resources of the physical FAS unit. Additional vFilers can then be created

with storage and network resources assigned specifically to them.

What is Vfiler ?

A lightweight Instance of Data ONTAP Multi protocol server and all the system resource are shared

b/w Vfiler units.

-Storage units in the vfilers are Flexvols and Qtrees

-Network Units are IP Address, VLAN, VIFs, aliases and IPspaces

-Vfiler units are not hypervisors –vfiler resource cannot be accessed and discovered by any other

vfiler units

Multi store configuration:

Up to 65 secure partitions (vFiler units) on a single

storage system (64+vfiler0)

IP Storage based (NFS,CIFS & iSCSI servers)

Additional storage and n/w resource can be moved,

added or deleted

NFS, CIFS, iSCSI, HTTP, NDMP, FTP, SSH and SFTP

protocols are supported

-Protocols can be enabled / disabled per vFiler

-Destroying a vFiler does not destroy data

What Makes MultiStore Secure?

– IPspaces

– Administrative separation

– Protocol separation

– Storage separation

An IPspace has a dedicated routing table

Each physical interface (Ethernet port) or logical interface (VLAN) is bound to a single Ipspace

A single IPspace may have multiple physical & logical interfaces bound to it

Each customer has a unique IPspace

Use of VLANs or VIFs is a best practice with IPspaces

File Services Consolidation

Application Hosting

Always-On Data Mobility

No planned downtime for-:

Storage capacity expansion

Scheduled maintenance outages

Software Upgrades

FC Switch

Fabric Address

MAC address in networking is 48 bit like in SAN fabric address is 24 bit address.

01:EF:03:12:08:ef (12*4=48 bit MAC for NIC)

Fabric Address(24bit)-:

Domain ID : Area ID : ALPA

8 bit 8 bit 8 bit

We have decimal numbers -0 -9

Hexadecimal-0-9,A,B,C,D,E,F,10 to 1F,20 to 2F,F0-FF

Fabric Address

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01-EF address are used for addressing and F0 and FF are reserved.

EF= E * 161 + F * 160

=14 * 16 + 15 * 1

=239

So we can connect 239 switches in a single fabric but domain ID will be different for each switch

Area- 8 bit address given to each port so 28 = 256 (Max) ports

First port address is 0 and last is EF

Example-16 ports, 32 ports ..etc.

ALPA- Arbitrated loop physical address 8 bit address.

Single port with multiple servers can be connected.

Fiber channel switch port interface

Switch Ports

E_Port :- Expansion port, two switches to make a

fabric

F_Port :- A fabric port to which an N-port attaches

FL_port :- A fabric loop port which a loop attaches

Device Ports

N_Port :- Port designator for direct fabric attached

devices.

NL_Port :- Device that is attached to the loop (host

and storage)

Fabric Address for Initiator & Target

NETWORKING

Why FC is used in FC SAN?

Advantage-:

-FC carries multiple protocols and it also carries FC

-Existing protocol can carry through FC

-Carrying SCSI data through FCP called SCSI—FCP

-Carrying IP data over FC called FCIP

-Large connectivity (16 millions devices)

-High performance and speed (16gb/sec)

-Low latency (Latency in SAN Microseconds)

Disadvantage-:Costly

FC LAYERS

FC0-Physical layer –understanding of physical components

FC1- 8b/10bEncoding and Decoding –Internal

FC2-Data delivery –Fragmentation

FC3-Common services –Advance components

FC4-ULP mapping (Upper level protocol mapping)

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ZONING

Zoning= Opening a path between the N-ports

How can we open the path?

Zone can be implemented by-:

1.WWN zoning (Soft Zoning)

2.Port zoning (Hard Zoning)