Answering the Database Scale Out Problem with PCI SSDs
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This document discusses using solid state drives (SSDs) to address the database scale out problem for a growing website. It summarizes the challenges of keeping site performance high while data and traffic increase. Traditional approaches like replication and query optimization were no longer sufficient. Testing Fusion-io SSDs on HP Blade servers showed dramatic improvements in queries per second, response times, replication catch-up times, and server recovery times compared to SAS HDDs. SSDs allowed scaling the database infrastructure on fewer servers, reducing operating costs by 75% while improving performance and scalability. Other potential uses of SSDs in the data center are also mentioned.
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Je hebt een goed idee en wil dit online vorm gaan geven met een webshop. Maar hoe start je een webshop?
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E-commerce is behoorlijk 'marketing-driven', daarom is aan dit onderdeel ook relatief veel tijd besteed. Een mooie shop met goede producten is immers niet echt waardevol wanneer je klanten je niet kunnen vinden.
Wil je hier eens over doorpraten? Of heb je hulp nodig bij je online marketing activiteiten? Neem dan contact op via http://xpertmarketing.nl/contact
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- 1. Answering the Database Scale Out Problem: SSDs in the Data Center April 14, 2010 Dan Marriott Director - Production Operations danm@answers.com
- 2. Database layer • MySQL 5.0.87-b20-percona • MySQL 5.0.51a 2
- 3. Challenges • Keep site fast while site traffic and stored data are ever-increasing • Replication lag = 0 or users get stale data • Forever being forced to further optimize queries constantly vying for dev resources to do this • Controlling hardware growth (Cap & OpEx $$$) regularly adding servers to handle growth 3
- 4. Handling high growth – database tier • Separate reads and writes • Add more read DB slaves • Use Memcached where possible • Optimize Queries • Partition large databases _________ Started hitting a wall: Replication Lag even when servers handling modest # queries/sec 4
- 5. Typical DB read cluster 5
- 6. Fusion-io for HP Blade Servers • March ’09: HP announce IO Accelerator card for blades (manuf. by Fusion-io) • Sizes: 80 & 160GB SLC 320GB MLC • April ’09: received two cards – began testing 6
- 7. Easy to install • One man job. Takes 60 secs. 7
- 8. Performance Tests Blade Server – Blade Server – Test SAS HDDs Fusion-io card Improvement Max Queries/sec (Seconds_Behind_Master: 0) 350 Q/sec 3,500 Q/sec 900% Application response 100 ms 70 ms 30% time Replication catch-up > 6 hours 12½ mins 3,000% time (after restore) Full DB server > 8 hours 55 mins 800% recovery Additionally, CPU load dropped from 30% to 18% (even with Fusion-io driver overhead) 8
- 9. Typical DB read cluster 9
- 10. Fusion-io Value Add for Answers.com • Scalability. >Twice the performance capacity on 1/4 servers • 100% ROI on day of purchase (repurpose other 3/4) • 75% reduction in operating costs: Rack Space, Power and Cooling Server Administration Database Administration • 75% fewer failure points 10
- 11. Other SSD uses in the Data Center • Varnish (Web caching layer) • DB Backup Servers • Log Analysis • Data Warehouse 11