Virtualizzazione dello storage

Storage Enterprise
y Enterprise Storage System
– Strategy that focuses on storage availability, protection,
organization, and backup
y Problematiche
– Scelta della tecnologia
– Scelta della soluzione
– Consolidamento dello storage
– Strategie di backup, restore e disaster recovery
Esigenze dei clienti
Keeping up with data growth
without adding cost or complexity
y Affordable
– Budgets aren’t all flexible
y Scalability and Flexibility
– Growing your storage infrastructure almost always means
increasing complexity of your storage architecture
– Unable to support business needs due to insufficient
storage solution.
y Reliability and Highly available
– Unpredicted downtime and data loss
– Everyone’s applications are critical
y Management
– IT Admin costs increasing due to complexity/obsolescence of
infrastructure, interoperability within environment
y Usability
– Extensive interoperability testing and migration cycles
y Easy to use
– Not everyone is a storage specialist
Virtualizzazione e storage
VIRTUALIZATION USE IS
GROWING:
– 2006: 6% OF VOLUME
SERVERS DEPLOYED IN
VIRTUALIZED
ENVIRONMENTS
– 2011: OVER 20%
LIVE MIGRATION IS KEY
FEATURE:
– 2006: USED ON 44% OF
VIRTUALIZED PLATFORMS
– 2011: USED ON OVER 80%
TECNOLOGIE
5
Tipi di storage
Tecnologia
Protocollo
Velocità
Tipo di dati
Utilizzo
DAS
SCSI, SAS
320 MB/s, 1.5 Gb/s
blocchi
storage locale
NAS
IP
100Mb/s, 1Gb/s
file
file sharing
CAS
IP
archivi
archiviazione
SAN Fibra
FC
4 Gb/s
blocchi
storage condiviso
SAN Rame
FCIP, iSCSI
100Mb/s, 1Gb/s
blocchi
storage condiviso
y
y
y
y
y
y
DAS (Direct Attached Storage)
NAS (Network Attached Storage )
CAS (Content Addressable Storage)
SAN (Storage Area Network)
ESN (Enterprise Storage Network)
iBAN (InfiniBand Area Network)
Network-Attached Storage
(NAS)
y Evoluzione dei fileserver
y Utilizzano protocolli di condivisione file
– CIFS/SMB
– NFS
– FTP
y Basati su sistemi embedded
– Custom
– Windows Storage
– Linux
y Funzioni RAID interne
y Affidabilità e disponibilità?
Storage Area Network
(SAN)
y Rete dedicata ad alta velocità per collegare host con dischi e/o
librerie di nastri
– Componente tipica dell’Enterprise Storage
y Tipi di protocolli adottati
– Fibre Channel networking con SCSI command set
– iSCSI (2003) con SCSI command set over TCP/IP
– ATA-over-Ethernet (AOE) protocol
y Lato server (host)
– Fibre Channel Host Bus Adapter (HBA)
– Accesso tramite Logical Unit Number (LUN)
y Differenze dai sistemi NAS
– http://www.nas-san.com/differ.html
SAN FC o iSCSI
y Fibre channel e iSCSI
– entrambi sono dei protocolli per reti SAN
– entrambi trasportano instruzioni SCSI
– entrambi permettono la connessione di dischi esterni e
condivisi
y Ma…
– non hanno lo stesso costo
– non hanno le stesse prestazioni e la stessa affidabilità
– non hanno la stessa flessibilità
y Quale scegliere?
Fiber Channel (1)
y Fibre Channel è una tecnologia per reti dati, usata
principalmente per implementazioni di SAN in fibra
– Iniziò per un utilizzo principalmente nel campo dei
supercomputer, ma è diventato il tipo di connessione
standard per le SAN nell'enterprise storage
y Il Fibre Channel Protocol (FCP) è il protocollo di
interfaccia dello SCSI sul Fibre Channel
– Nonostante il nome, il segnale Fibre Channel può
viaggiare sia su cavi in rame UTP che in fibra ottica
– Attualmente la velocità tipica è di 4 Gb/s
– Esistono già i primi prodotti a 8 Gb/s
Fibre Channel (2)
Rete Fabric
Redundant
Fibre Channel
Switches
Dell | EMC
SAN
VMware ESX Server
on Dell PowerEdge
Alternative DAS?
iSCSI (1)
y iSCSI sfrutta l’infrastruttura IP, tipicamente conosciuta
e diffusa, utilizzando il protocollo TCP per muovere
dati fra le applicazioni e risorse storage
– si basa su un modello Target/Initiator
– può utilizzare NIC Ethernet standard
– oppure apposite HBA
y Permette al protocollo SCSI di essere trasportato su
LAN Ethernet e su WAN IP
y Possibili soluzioni per la sicurezza
– 802.1x, CHAP e IPSec
– verificare quale è supportata!
iSCSI (2)
iSCSI initiator
File system
File system
Disk driver
Disk driver
SCSI
iSCSI target
SCSI
SCSI MP
iSCSI MP
iSCSI
TCP/IP
TCP/IP
Ethernet
Ethernet
SCSI
Ethernet
Direct attached
block storage
using SCSI/SAS
Ethernet
header
Remote block storage
using iSCSI
IP
IP
header
header
TCP
iSCSI
iSCSI
header
header
SCSI payload data …
CRC
Storage Network Adoption
Rate
100%
80%
NAS
60%
SAN iSCSI
SAN Fibre Channel
40%
Direct Attach
20%
0%
1998
1999
2000
2001
2002
2003
2004
2005
CONSOLIDAMENTO
DELL CONFIDENTIAL - Internal Use Only
15
Architettura tradizionale
Architettura con SAN
PRODOTTI
18
2008 CLARiiON Family
Complete Range of Affordable and Easy-to-Use Storage Platforms
CLARiiON CX3 UltraScale Series
CLARiiON
AX4
AX4
CX3-10
CX3-20
CX3-40
Proven software functionality
CX3-80
DELL SAN PORTFOLIO
Key Attribute
Key Tenets
Dell disk storage products target customers that have distinctly different
challenges and needs
Increasing Capability
20
DELL INTERLINE
POSITIONING
CUSTOMER FOCUS BY PRODUCT LINE
Products Customer Focus
CX3
y
y
y
y
Customers who require enterprise storage solutions
Buy for Fibre Channel first
iSCSI is a secondary option for second tier hosts
Enterprise arrays that support up to 100’s of drives,
hosts, and LUNs
Proof Points
y
y
y
y
y
Multi fabric FC/iSCSI arrays
Support up to 480 drives
Performance with mixed host support
Advanced software capabilities
Family values & upgrades
PS5000
y Customers looking for simple, but powerful iSCSI
storage
y Scalable iSCSI storage
y Optimized for virtualization
y Simple “pay as you grow” architecture
y Support up to 192 drives & 1024 hosts
y Peer control, provisioning, protection
AX4-5
y Customers with departmental or remote office needs
y Looking for common management and applications
with their data center arrays
y Entry FC array with iSCSI option
y FC or iSCSI arrays
y Support up to 60 drives & 64 hosts
y Simple & scalable with advanced
software capabilities
MD3000i
y SMB customers looking to deploy an iSCSI SAN as
their first steps beyond server-centric storage
y Entry iSCSI SAN for up to 16 hosts
y
y
y
y
Low cost iSCSI SAN
Simple to use
Aligned with PowerEdge servers
Support up to 45 drives & 16 hosts
NX1950
y Customers with departmental or remote office needs
for file storage with basic data management,
protection, and iSCSI features
y Optimized NAS file storage with an iSCSI option
y
y
y
y
Best in class NAS storage for Windows
NAS gateway option for existing storage
Single pane of glass management
Integrated iSCSI support up to 10Gbs
SERVIZI
22
Snapshot
y Gestione RAID
y SAN Copy
y SAN Snapshot
y Mirror
MirrorView
MirrorView/Synchronous
RPO: Zero seconds
• Both images identical
• Limited distance
• High network bandwidth
• One primary to one or two
secondaries
1
2
Limited distance
4
3
Primary
Secondary
MirrorView/Asynchronous
RPO: 30 minutes to hours
• Target updated periodically
• Unlimited distance
• Restartable copy on
secondary if session fails
• Optimized for low network
bandwidth (consumes
100 Mb/s maximum)
• One primary to one
secondary
1
2
4
Unlimited distance
3
5
Primary
Secondary
RepliStor
y Host-based replication for Windows in
physical and virtual environments
– Real-time asynchronous replication
over unlimited distances
– Protects Microsoft Exchange, SQL
Server, and Windows File System
data
– Automated failover during server
outage
y Ideal for VMware infrastructure
– PhysicalÆVirtual, VirtualÆVirtual,
VirtualÆPhysical
– Flexible licensing allows unlimited
virtual machines per physical server
y Easy to use
– Centralized management GUI
– Configuration wizards
– Scheduling, user rights, and security
options
– Remote installation and upgrade
y Microsoft Volume Shadow Copy Service
(VSS) integration for multiple consistent
copies
IP Network
2
Asynchronous
Replication
1
3
Unlimited distance
Primary Site
Secondary Site
n RepliStor observes data written to storage
o RepliStor replicates changes to target
p RepliStor writes changes at secondary site
Next?
y SAM (Storage Area Management)
y FC 8Gb/s e Ethernet 10Gb/s
y Multilevel storage e/o backup
y Data de-duplication