From Local to a Global Storage Network Aloke Guha StorageTek guha@network.com; aloke_guha@StorageTek.com NetStore’99 October 14, 1999
Trend 1: Local Storage Area Network (SAN) Application Servers ! 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 LAN (IP) 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 Storage Network Storage T Disk Array Controller Storage T Disk Array Disk Array ICEBERG ICEBERG ICEBERG Storage Aloke Guha Internet2: NetStore’99 2
Trend 2: Data/ Storage Utility THE WALL STREET JOURNAL ! Level3 agreement: potential June 28 th , 1999 revenue ~$400M over next Storage Technology to Begin Selling two to three years Data Storage on Pay-as-You-Go Basis ! Frontier Corp: backup and By WILLIAM M. BULKELEY Staff Reporter of THE WALL STREET JOURNAL recovery Storage Technology Corp. plans to begin selling computer storage on a ! Atrieva file backup over pay-as-you-go basis, a novel approach aimed at spurring revenue growth. web: 50% growth per month StorageTek is expected to announce Monday that telecommunications company Frontier Corp. has signed up for the service. Frontier, ! RedDotNet, a Digital On- Rochester, N.Y., plans to use StorageTek equipment to offer data backup and recovery services for its big Internet customers. Demand Inc. subsidiary: to Under the StorageTek plan, customers will pay for storage by the protect and distribute more megabyte, much like customers buy electricity or natural gas. The company calls the approach a "storage utility." Traditionally, outfits have than 200,000 hours of had to purchase an entire storage system for their data-storage needs. digitized music–on a pay- StorageTek, of Louisville, Colo., predicts the strategy could generate as-you-use basis 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. Aloke Guha Internet2: NetStore’99 3
Extending SANs: Bandwidth I ssues 140 Sequential Reads 120 100 ! Native server-storage (FC) can have high MB/ S 80 throughput 60 ! Server based extensions 40 requires tuning to improve 20 throughput 0 8K 16K 32K 64K 128K 256K 512K 1024K2048K I / O size ! SAN extension offloads FC-LE (IP over FC) Performance 7 MTU=1500 application server load: 6 MTU=2048 channel extension déjà vu? 5 MTU=4096 MTU=8192 4 MB/ s MTU=16384 3 ! Refs. MTU-32768 2 – Guha, IEEE Gigabit Workshop, GigE 1 MTU=1500 March ‘99 GigE Jumbo 0 – Peglar and Guha, IEEE 0.15 0.3 0.6 1.2 2.4 5 10 20 40 80 160 LANMAN Workshop, Nov. ‘99 File Size (MB) Aloke Guha Internet2: NetStore’99 4
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 Aloke Guha Internet2: NetStore’99 5
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