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??????????????????????????????????????????????????????????????????????????д?????????????????臨????????????????????????????????????????????????????????????????в?????????????????????????????????????????????????????????????????????????Ч????????????檔??????????????????????????????????????檔???????????????Web????У??????????????cache???????????????????????????÷?????????????????????????SLA???????????????70%???????(??????1%????)??????cache???????30%??β????(??????????99%????)??????洢????????忪????????????????????????????????????????д??仯??

????Coding?????????????????????????????????ò??????????????????????Ч?????罫????????QPS??????????30%?????????????????????????????????????“??”?????????????????Ч?????罫?????????????????????SAO????????????????????????????????????????Ч???????Щ???????????????????????????

???????????????????????????????????????????????????????????????????????ж???????????????????????棬?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????и????????????????????????????????????????????????ì???????????????ж?????????Ч???????Ч?????????????????棬??????????????????????????????????????絹??????????????У????????????????????????????????????

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????The C10k problem refers to the problem of optimising server software to handle a large number of clients at the same time (hence the name C10k - concurrent ten thousand connections). The problem of web server optimisation has been studied because a number of factors must be considered to allow a web server to support many clients. This can involve a combination of operating system constraints and web server software limitations.

????The goal of SPDY is to reduce web page load time. This is achieved by prioritizing and multiplexing the transfer of web page subresources so that only one connection per client is required. Transmission headers are gzip-or DEFLATE-compressed by design. Moreover?? servers may hint or even push content instead of awaiting individual requests for each resource of a web page. SPDY????????HTTP RPC?????Ч???

???????????????????SSD??5-500??

???????event?????????????????????????????context switch?????

????Code review is systematic examination of computer source code. It is intended to find and fix mistakes overlooked in the initial development phase.

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