Transcript The Impact of NAS and SAN on Distributed File Systems

Impact of NAS and SAN
on Distributed File
Systems
1
Steve Widen
Research Director, Storage Software
IDC
[email protected]
October 25, 2000
NFS Vendors Conference
Page 1 of 23
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
October 25, 2000
NFS Vendors Conference
Page 2 of 23
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
October 25, 2000
NFS Vendors Conference
Page 3 of 23
Examples of Distributed
File Systems
• Sun (NFS)
• Common Internet File System
(CIFS)
• Novell (NetWare File System)
• Transarc (AFS and DFS)
October 25, 2000
NFS Vendors Conference
Page 4 of 23
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
October 25, 2000
NFS Vendors Conference
Page 5 of 23
1999 DFS Revenue by
Operating Environment
Mainframe OS/400
1%
2%
Embedded
28%
Unix
52%
32-bit Windows
14%
Linux/OOS
3%
Source: IDC, 2000
October 25, 2000
NFS Vendors Conference
Page 6 of 23
1999 DFS Revenue by
Region
W. Europe
16%
REMEA A/P
4%
2%
Japan
4%
L. America
1%
N. America
73%
Source: IDC, 2000
October 25, 2000
NFS Vendors Conference
Page 7 of 23
DFS Revenue Forecast
($M)
350
300
250
200
150
100
50
0
1
1999
October 25, 2000
2
2000
3
2001
NFS Vendors Conference
4
5
6
2002
2003
2004
Source: IDC, 2000 Page 8 of 23
Storage Software Trends
• SAN acceptance continues
• Competing SAN management
frameworks
October 25, 2000
–
CA and SAN Integrated Technology
Initiative (SANITI)
–
Sun and Federated Management
Architecture Specification (FMA) = Jiro
from Sun
–
VERITAS V3 SAN Initiative = SANPoint
NFS Vendors Conference
Page 9 of 23
Storage Software Trends
• Virtualization, data sharing and file
systems
• Growth of xSP Market
October 25, 2000
NFS Vendors Conference
Page 10 of 23
Storage Software Trends
• Four SAN Management Models
October 25, 2000
–
Server centric (Sun)
–
Storage centric (EMC)
–
SAN appliances (Compaq)
–
SAN switches and routers
NFS Vendors Conference
Page 11 of 23
Storage Software Trends
• SAN Vs. NAS
October 25, 2000
–
Are they mutually exclusive?
–
Does a SAN need to be FC?
–
Storage over IP
NFS Vendors Conference
Page 12 of 23
NAS Vs. SAN and DFS
Protocol
Network
SAN
NAS
FCP, Serial
SCSI
Fibre channel
NFS, CIFS
Source/Target Server/Device
Device blocks
Transfer
objects
Storage device Direct on
network
connection
Embedded file No
system
October 25, 2000
NFS Vendors Conference
Ethernet
Client/Server,
Server/Server
Files
I/O bus or
channel on
server
Yes
Page 13 of 23
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
October 25, 2000
NFS Vendors Conference
Page 14 of 23
NAS Vs. SAN
• SAN can include block (SCSI) and
file-oriented (NAS) storage
• NAS products can connect to
storage devices over a SAN
October 25, 2000
NFS Vendors Conference
Page 15 of 23
NAS Topology
System
Operating
Ethernet
Integrated
storage
Clients
NAS server
October 25, 2000
NFS Vendors Conference
Page 16 of 23
FC SAN Topology
Server
FCP
Storage
network
FCP
FCP
FC channel
storage
subsystems
October 25, 2000
NFS Vendors Conference
Page 17 of 23
IP SAN Topology
IP
Server
IP
(NFS or
CIFS)
IP
Storage
network
(NFS or
CIFS)
NAS servers
IP
(NFS or
CIFS)
October 25, 2000
NFS Vendors Conference
Page 18 of 23
NAS and SAN Topology
IP
Ethernet
network
TCP/IP
Server
IP or
Serial
SCSI
Storage
network
Serial
SCSI
Clients
October 25, 2000
NFS Vendors Conference
NAS server
Storage
device
Page 19 of 23
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
October 25, 2000
NFS Vendors Conference
Page 20 of 23
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
October 25, 2000
NFS Vendors Conference
Page 21 of 23
Questions
October 25, 2000
NFS Vendors Conference
Page 22 of 23
October 25, 2000
NFS Vendors Conference
Page 23 of 23