Ας ξεκινήσουμε με μερικά στατιστικά
Category Metric Largest single database
70 ΤΒ Largest table
20 ΤΒ Biggest total data 1 application
88 PB Highest database transactions per second 1 db (from Perfmon)
130.000 Fastest I/O subsystem in production (SQLIO 64k buffer)
18 GB/sec Fastest “real time” cube
5 sec latency data load for 1TB
20 minutes Largest cube
12 TB Ας προχωρήσουμε στα πιο ειδικά
OLTP Systems
MySpace
500+ SQL Servers, adding new ones every week Total data managed > 1 PB Data Dependent Routing, Distributed Partitioned Views, Replication, SODA Currently moving to Windows 2008 / SQL 2008 Data Dependent Routing, Distributed Partitioned Views, Replication, Caching Tier, Service Broker 500,000 Users: A Simple Architecture Stumbles (two Web servers talking to a single database server – 3 database servers (1 write, 2 read)) 1 Million Users: Vertical Partitioning Solves Scalability Woes (separate databases for parts of the Web site that served different functions) 3 Million Users: Scale-Out Wins Over Scale-Up (cost for scale-up too high), SODA 9 Million Users: Site Migrates to ASP.NET, Adds Caching Tier, Data Dependent Routing 26 Million Users: MySpace Embraces 64-Bit Technology, SQL Server 2008, Service Broker High Availability Windows Clusters 7+1, moving to 10+1 Unattended patching via custom Powershell scripts and management control screen Extensive testing before patching Continually improving operations process 3,000 – 7,000 connections average 2 data centers Doing SAN snapshots between sites In case of loss of one site, can bring up other site to take over within a few hours. Great article on architecture changes as they grew: http://www.baselinemag.com/article2/0,1540,2082921,00.asp Bwin.com
Online gaming applications - Europe‘s largest betting line-up Sports Poker Casino Skill Games 90 different sports covered in 22 languages > 12,000 different bets offered per day > 3 million individual and combination bets placed every day Bwin.com sponsors top world soccer teams Real Madrid AC Milan FC Bayern Munich Key Technologies Running on SQL Server 2008 & Windows 2008 Enterprise Windows Communication Foundation Synchronous database mirroring between two centers 12 km apart Added 1 ms delay on transaction 99.99x% availability @ 24 x 7 since migrating to SQL from Oracle. 100.00% uptime in 2008 and 2009 (since moving to SQL 2008 and Windows 2008) Zero data loss (financial transactions are involved) Replication and Log shipping for most databases DB Mirroring for betting data base. Full suite of SQL products - IS, AS and RS ASP.NET for applicatio Some numbers Peak financial transactions 6000 per second Peak db transactions 30,000 per second Databases 800+ Instances 100+ Largest table 2 billion rows Total data in SQL Server 100+ TB Backup of 2 TB over network under 1 hr Largest machines 64 core 512 GB IA2 HP 6 x 32 core IA2 400% boost in performance on 128 cores 256GB RAM on IA64 using SQL 2008 R2 More info http://sqlcat.com/whitepapers/archive/2009/08/13/a-technical-case-study-fast-and-reliable-backup-and-restore-of-a-vldb-over-the-network.aspx http://www.microsoft.com/casestudies/Case_Study_Detail.aspx?casestudyid=4000001470 Retail Application
1,200 stores SQL Standard 10 GB average 15,000 cash registers SQL Express 10 MB database average 1 Corporate Server SQL Enterprise Windows Cluster + DB Mirroring AS, IS, RS 12+ TB database, 1.5 TB cube. Merge replication for products & pricing Service Broker for all transactions One of the largest Service Broker and replication projects in the world 2 Million SKUs (products) 25 Million Accounts 10 million transactions / day SQL Server, AS, IS, RS Windows Cluster, DB Mirroring, Log Shipping
DATA WAREHOUSEs
Pan Starrs Project
Largest Astronomy project in history 4 telescopes capturing 1.5 giga pixel images 100TB on single instance (5 db x 20TB) Total data managed > 1PB 5+TB added per day HA/DR Relying on backups of the input files for now Telecom
CDR Analytics 70TB Relational 4TB largest cube 100+ concurrent queries Itanium 64 core with storage system rated over 20GB/sec throughput Loading 1TB in Processing 1m rec/sec in AS cubes Hilton Hotels
Room forecasting system Full suite of SQL products (SQL, AS, IS, RS) Scale out AS and RS Load Balanced Analysis Services reader machines 40 to 50 concurrent users per RS server Complex queries Large data sets returned to many clients IBM xSeries and IBM Blade Center servers Case study: http://www.microsoft.com/casestudies/casestudy.aspx?casestudyid=49192 Stein Mart
First Fast Track case study Saved $50,000 / month after AS/400 migration Faster results – 3 hours of processing instead of 14 hours Less people to maintain Users love the new tools! 4 TB data warehouse http://www.microsoft.com/casestudies/Case_Study_Detail.aspx?casestudyid=4000007013
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