Impact of NAS and SAN on Distributed File Systems
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Transcript of Impact of NAS and SAN on Distributed File Systems
Page 1 of 23 NFS Vendors ConferenceOctober 25, 2000
Impact of NAS and SAN on Distributed File Systems
Steve Widen
Research Director, Storage Software
IDC
1
Page 2 of 23 NFS Vendors ConferenceOctober 25, 2000
Agenda• What is a Distributed File System?
• What is NFS?
• Distributed files systems revenues and forecast
• Storage software trends
• NAS Vs. SAN and distributed file systems
• Customer drivers
Page 3 of 23 NFS Vendors ConferenceOctober 25, 2000
What is a Distributed File System (DFS)?
“DFS software allows systems or nodes to appear to access a common file system even though the actual storage devices may be located on another system or node.”
IDC, 2000
Page 4 of 23 NFS Vendors ConferenceOctober 25, 2000
Examples of Distributed File Systems• Sun (NFS)
• Common Internet File System (CIFS)
• Novell (NetWare File System)
• Transarc (AFS and DFS)
Page 5 of 23 NFS Vendors ConferenceOctober 25, 2000
What is NFS?
• Created by Sun Microsystems in 1987 as an open standard distributed file system
• Open specification adopted by most workstation/PC vendors
• Allows workstations to share a file system that exists on a central server
Page 6 of 23 NFS Vendors ConferenceOctober 25, 2000
1999 DFS Revenue by Operating Environment
Unix52%
Linux/OOS
3%
Embedded28%
32-bit Windows 14%
Mainframe
2%
OS/4001%
Source: IDC, 2000
Page 7 of 23 NFS Vendors ConferenceOctober 25, 2000
1999 DFS Revenue by Region
N. America73%
REMEA2%
Japan4%W. Europe
16%
L. America1%
A/P4%
Source: IDC, 2000
Page 8 of 23 NFS Vendors ConferenceOctober 25, 2000
DFS Revenue Forecast
0
50
100
150
200
250
300
350
1 2 3 4 5 6
1999 2000 2001 2002 2003 2004
($M)
Source: IDC, 2000
Page 9 of 23 NFS Vendors ConferenceOctober 25, 2000
Storage Software Trends• SAN acceptance continues
• Competing SAN management frameworks– CA and SAN Integrated Technology Initiative
(SANITI)
– Sun and Federated Management Architecture Specification (FMA) = Jiro from Sun
– VERITAS V3 SAN Initiative = SANPoint
Page 10 of 23 NFS Vendors ConferenceOctober 25, 2000
Storage Software Trends
• Virtualization, data sharing and file systems
• Growth of xSP Market
Page 11 of 23 NFS Vendors ConferenceOctober 25, 2000
Storage Software Trends
• Four SAN Management Models– Server centric (Sun)
– Storage centric (EMC)
– SAN appliances (Compaq)
– SAN switches and routers
Page 12 of 23 NFS Vendors ConferenceOctober 25, 2000
Storage Software Trends
• SAN Vs. NAS– Are they mutually exclusive?
– Does a SAN need to be FC?
– Storage over IP
Page 13 of 23 NFS Vendors ConferenceOctober 25, 2000
NAS Vs. SAN and DFSSAN NAS
Protocol FCP, SerialSCSI
NFS, CIFS
Network Fibre channel Ethernet
Source/Target Server/Device Client/Server,Server/Server
Transferobjects
Device blocks Files
Storage deviceconnection
Direct onnetwork
I/O bus orchannel onserver
Embedded filesystem
No Yes
Page 14 of 23 NFS Vendors ConferenceOctober 25, 2000
NAS Vs. SAN
• SAN is a network while a NAS is typically file server or intelligent file-aware device
• SAN implies dedicated network as I/O channel between storage and servers
Page 15 of 23 NFS Vendors ConferenceOctober 25, 2000
NAS Vs. SAN
• SAN can include block (SCSI) and file-oriented (NAS) storage
• NAS products can connect to storage devices over a SAN
Page 16 of 23 NFS Vendors ConferenceOctober 25, 2000
NAS Topology
ClientsNAS server
Ethernet
Ope
rati
ng
Sys
tem
Integrated storage
Page 17 of 23 NFS Vendors ConferenceOctober 25, 2000
FC SAN Topology
FC channel storage subsystems
ServerStoragenetwork
FCP
FCP
FCP
Page 18 of 23 NFS Vendors ConferenceOctober 25, 2000
IP SAN Topology
Server
IPStoragenetwork
IP
IP
IP
(NFS orCIFS)
NAS servers
(NFS orCIFS)
(NFS orCIFS)
Page 19 of 23 NFS Vendors ConferenceOctober 25, 2000
NAS and SAN Topology
Storagedevice
Server
Clients
Ethernetnetwork IP orTCP/IP
SerialSCSI
Storagenetwork
NAS serverIP
SerialSCSI
Page 20 of 23 NFS Vendors ConferenceOctober 25, 2000
Customer Drivers
• Storage management solutions need to revolve around the application
• Requirement of a full solution, no longer accept point products in most cases
• Storage software solutions need to be based on standards
Page 21 of 23 NFS Vendors ConferenceOctober 25, 2000
Customer Drivers
• Need to solve the availability of data issue which is critical to running the business
• Need to access different data types from different operating environments
• Lack of trained IT staff, ex PC Helpdesk and FC SAN expertise
Page 22 of 23 NFS Vendors ConferenceOctober 25, 2000
Questions
Page 23 of 23 NFS Vendors ConferenceOctober 25, 2000