storage technologies
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Storage Technologies. Storage Networks and Storage Devices. Borislav Varadinov. Telerik Software Academy. academy.telerik.com. System Administrator. [email protected]. Marian Marinov. CEO of 1H Ltd. [email protected]. Table of Contents. What Is Direct Attached Storage ? - PowerPoint PPT PresentationTRANSCRIPT
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Storage TechnologiesStorage TechnologiesStorage Networks and Storage DevicesStorage Networks and Storage Devices
Borislav Borislav VaradinovVaradinov
Telerik Software Academy
Telerik Software Academy
academy.telerik.com
academy.telerik.com
System AdministratorSystem AdministratorMarian Marian
MarinovMarinovCEO of 1H Ltd.CEO of 1H [email protected]@[email protected]@itp.bg
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Table of ContentsTable of Contents What Is Direct Attached Storage?What Is Direct Attached Storage? What Is a Storage Area Network?What Is a Storage Area Network? What is Fibre Channel?What is Fibre Channel? Other Storage NetworksOther Storage Networks What Is Network Attached What Is Network Attached
Storage?Storage? What Is the Difference Between a What Is the Difference Between a
SAN and a NAS?SAN and a NAS?
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What Is Direct Attached What Is Direct Attached Storage?Storage?
ATA (Advanced Technology Attachment)ATA (Advanced Technology Attachment) SATA (Serial Advanced Technology SATA (Serial Advanced Technology
Attachment)Attachment) eSATAeSATA SCSI (Small computer system interface)SCSI (Small computer system interface) SAS (Serial Attached SCSI)SAS (Serial Attached SCSI) USBUSB FireWareFireWare 3
Direct-attached storage is the most basic level of storage, in which storage devices are part of the host computer
or directly connected to it.
Direct-attached storage is the most basic level of storage, in which storage devices are part of the host computer
or directly connected to it.
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DASDAS
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LAN
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DAS DAS Advantages and Advantages and DisadvantagesDisadvantages
Isolated to a small number of servers (2-4)Isolated to a small number of servers (2-4)
Small capacity (8 – 12 Disks)Small capacity (8 – 12 Disks)
Slower Slower
Easy to configureEasy to configure
InexpensiveInexpensive
Advantages
Disadvantages
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What Is a Storage Area What Is a Storage Area Network?Network?
Provides block-based storage and leaves file system Provides block-based storage and leaves file system concerns on the "client" sideconcerns on the "client" side
Primarily used to access disk arrays and tape librariesPrimarily used to access disk arrays and tape libraries
The devices appear like locally attached devices to The devices appear like locally attached devices to the operating systemthe operating system
Offers storage high availability and flexibilityOffers storage high availability and flexibility
Most SAN networks rely on the SCSI protocol for Most SAN networks rely on the SCSI protocol for communication between servers and disk drive communication between servers and disk drive devicesdevices
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A Storage Area Network (SAN) is a dedicated storage network that
provides central access to block level data storage devices.
A Storage Area Network (SAN) is a dedicated storage network that
provides central access to block level data storage devices.
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What is Fibre Channel?What is Fibre Channel?
Fibre Channel Protocol (FCP) transmits SCSI Fibre Channel Protocol (FCP) transmits SCSI commands over the FC networkcommands over the FC network
FC is the most used SAN communication standardFC is the most used SAN communication standard
FC was originally designed to support only fiber FC was originally designed to support only fiber optic cabling optic cabling
Twisted-pair copper support is added laterTwisted-pair copper support is added later
FC architecture includes a significant amount of FC architecture includes a significant amount of hardware processing to deliver high performancehardware processing to deliver high performance
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Fibre Channel (FC) is a multi-layered network that define characteristics and
functions for moving data across the network.
Fibre Channel (FC) is a multi-layered network that define characteristics and
functions for moving data across the network.
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Fiber Channel Fiber Channel ComponentsComponents
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SANSAN
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Storage Area Network
Clients
Servers
StorageDevices
TCP/IP Network
File Systems – NTFS/Ext3/FAT/XFS File Systems – NTFS/Ext3/FAT/XFS
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SAN SAN Advantages and Advantages and DisadvantagesDisadvantages
More/Very expensiveMore/Very expensive
Complicated SolutionComplicated Solution
Requires specialized skills and trained Requires specialized skills and trained expertsexperts
Centralized storage for many serversCentralized storage for many servers
Fastest access times Fastest access times
Easily expandable and flexibleEasily expandable and flexible
High level of redundancy and high High level of redundancy and high availabilityavailability
Advantages
Disadvantages
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Other Storage Other Storage NetworksNetworks
iSCSIiSCSI
Transmits SCSI commands over standard Transmits SCSI commands over standard Internet Protocol (TCP/IP) networksInternet Protocol (TCP/IP) networks
FCoE (Fibre Channel over Ethernet)FCoE (Fibre Channel over Ethernet)
Encapsulation of Fibre Channel over Encapsulation of Fibre Channel over EthernetEthernet
AOE (ATA over Ethernet)AOE (ATA over Ethernet)
Encapsulation of ATA protocol over Encapsulation of ATA protocol over EthernetEthernet
HyperSCSIHyperSCSI
Encapsulation of SCSI over EthernetEncapsulation of SCSI over Ethernet11
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What Is Network Attached What Is Network Attached Storage?Storage?
Offers centralized storage at an affordable Offers centralized storage at an affordable price price
Often manufactured as a computer applianceOften manufactured as a computer appliance
Uses file-level access protocols (NFS,SMB)Uses file-level access protocols (NFS,SMB)
Can be created easily with standard Linux or Can be created easily with standard Linux or Windows serverWindows server
Some NAS appliances offer SAN Some NAS appliances offer SAN communication through FCP or iSCSI communication through FCP or iSCSI
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NAS is a central network storage accessed through a standard computer
network (TCP/IP) and high-level protocol
NAS is a central network storage accessed through a standard computer
network (TCP/IP) and high-level protocol
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NAS NAS Advantages and Advantages and DisadvantagesDisadvantages
Slower access timesSlower access times
Not a real enterprise solution for high I/O Not a real enterprise solution for high I/O applicationsapplications
Easy to configureEasy to configure
Relatively inexpensiveRelatively inexpensive
Used in many business scenariosUsed in many business scenarios
Centralized storage for many servers and Centralized storage for many servers and workstationsworkstations
Advantages
Disadvantages
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What Is the Difference What Is the Difference Between NAS and SAN?Between NAS and SAN?
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Storage Area Network
Clients
Servers
StorageDevices
Block Level
Access
TCP/IP Network
Clients and Servers
NASDevices
File Level
Access
NFS or SMB ClientNFS or SMB Client
NFS or SMB ServerNFS or SMB Server
TCP/IP Network
File Systems – NTFS/Ext3/FAT/XFS
File Systems – NTFS/Ext3/FAT/XFS
File Systems – NTFS/Ext3
File Systems – NTFS/Ext3
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Storage Networks and Storage Storage Networks and Storage
DevicesDevices
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