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<Using MySQL as a NoSQL - A story for exceeding 750,000 qps on a commodity server ⁄ >




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Most of high scale web applications use MySQL + memcached. Many of them use also NoSQL like TokyoCabinet/Tyrant. In some cases people have dropped MySQL and have shifted to NoSQL. One of the biggest reasons for such a movement is that it is said that NoSQL performs better than MySQL for simple access patterns such as primary key lookups. Most of queries from web applications are simple so this seems like a reasonable decision.
Like many other high scale web sites, we at DeNA(*) had similar issues for years. But we reached a different conclusion. We are using "only MySQL". We still use memcached for front-end caching (i.e. preprocessed HTML, count/summary info), but we do not use memcached for caching rows. We do not use NoSQL, either. Why? Because we could get much better performance from MySQL than from other NoSQL products. In our benchmarks, we could get 750,000+ qps on a commodity MySQL/InnoDB 5.1 server from remote web clients. We also have got excellent performance on production environments.



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