From Local to a Global Storage Network Aloke Guha StorageTek - - PowerPoint PPT Presentation

From Local to a Global Storage Network

Aloke Guha StorageTek

guha@network.com; aloke_guha@StorageTek.com

NetStore’99 October 14, 1999

Aloke Guha

Internet2: NetStore’99 2

! SAN provides network connectivity between

storage devices and apps –

Trend: 4% (‘98) to 59% (‘01) of new disk in SAN

! Creates a common storage pool that can be

shared and managed at lower admin cost

! Increases overall storage I/O ! Enables more flexible storage mgmt.

–

E.g., 3rd party data transfer, failover

!SAN + Intelligence = NG Controller

Trend 1: Local Storage Area Network (SAN)

Storage Network

LAN (IP)

Storage Application Servers

Aloke Guha

Internet2: NetStore’99 3

Trend 2: Data/ Storage Utility

THE WALL STREET JOURNAL

June 28 th , 1999 Storage Technology to Begin Selling Data Storage on Pay-as-You-Go Basis By WILLIAM M. BULKELEY Staff Reporter of THE WALL STREET JOURNAL Storage Technology Corp. plans to begin selling computer storage on a pay-as-you-go basis, a novel approach aimed at spurring revenue growth. StorageTek is expected to announce Monday that telecommunications company Frontier Corp. has signed up for the service. Frontier, Rochester, N.Y., plans to use StorageTek equipment to offer data backup and recovery services for its big Internet customers. Under the StorageTek plan, customers will pay for storage by the megabyte, much like customers buy electricity or natural gas. The company calls the approach a "storage utility." Traditionally, outfits have had to purchase an entire storage system for their data-storage needs. StorageTek, of Louisville, Colo., predicts the strategy could generate revenue of $200 million by 2002. David Weiss, StorageTek's chairman and chief executive, said the pay-as-you-go approach is especially appealing for fast-growing Internet companies with heavy data-storage needs.

! Level3 agreement: potential

revenue ~$400M over next two to three years

! Frontier Corp: backup and

recovery

! Atrieva file backup over

web: 50% growth per month

! RedDotNet, a Digital On-

Demand Inc. subsidiary: to protect and distribute more than 200,000 hours of digitized music–on a pay- as-you-use basis

Aloke Guha

Internet2: NetStore’99 4

Extending SANs: Bandwidth I ssues

FC-LE (IP over FC) Performance 1 2 3 4 5 6 7 0.15 0.3 0.6 1.2 2.4 5 10 20 40 80 160

File Size (MB)

MB/ s

MTU=1500 MTU=2048 MTU=4096 MTU=8192 MTU=16384 MTU-32768 GigE MTU=1500 GigE Jumbo

! Native server-storage

(FC) can have high throughput

! Server based extensions

requires tuning to improve throughput

! SAN extension offloads

application server load: channel extension déjà vu?

! Refs.

–

Guha, IEEE Gigabit Workshop, March ‘99

–

Peglar and Guha, IEEE LANMAN Workshop, Nov. ‘99

20 40 60 80 100 120 140 8K 16K 32K 64K 128K 256K 512K 1024K2048K I / O size MB/ S

Sequential Reads

Aloke Guha

Internet2: NetStore’99 5

Key Technical Areas to Work on

! Fast replication/extension: GB/loc↑↑

↑↑ ↑↑ ↑↑ vs GB/s/loc↑ ↑ ↑ ↑

! Time to do small grain object replication: #obj/disk↑↑

↑↑ ↑↑ ↑↑

! Coherency/Access Control: distribution of metadata ! Setting up Service Level Agreements: control/configuration

– Access time and Data transfer rate – Degree of consistency – Access rights – Availability/Fault-tolerance