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Mollom Architecture – Killing Over 373 Million Spams At 100 Requests Per Second
Mollom is one of those cool SaaS companies every developer dreams of creating when they wrack their brains looking for a viable software-as-a-service startup. Mollom profitably runs a useful...
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Medialets Architecture – Defeating The Daunting Mobile Device Data Deluge
Mobile developers have a huge scaling problem ahead: doing something useful with massive continuous streams of telemetry data from millions and millions of devices. This is a really good problem to...
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MapReduce
MapReduce是Google提出的一个软件架构，用于大规模数据集（大于1TB）的并行运算。概念”Map（映射）”和”Reduce（化简）”，和他们的主要思想，都是从函数式编程语言借来的，还有从矢量编程语言借来的特性。[1]当前的软件实现是指定一个Map（映射）函数，用来把一组键值对映射成一组新的键值对，指定并发的Reduce（化简）函数，用来保证所有映射的键值对中的每一个共享相同的键组。映射和化...
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New Relic Architecture – Collecting 20+ Billion Metrics A Day
This is a guest post by Brian Doll, Application Performance Engineer at New Relic.New Relic’s multitenant, SaaS web application monitoring service collects and persists over 100,000 metrics every...
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案例分享：Windows XP下，SYS登录报ORA-1031
Windows XP环境下安装的数据库，使用sys登录时报ora-1031错误。sqlplus / as sysdbaSQL*Plus: Release 10.2.0.1.0 – Production on M Mar 8 17:22:36 2010Copyright (c) 1982, 2003, Oracle. All Rights Reserved.ERROR: ORA-1031:...
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安装Oracle Database时，先检查软件介质的完整性
Oracle Database 11.2的安装介质越来越大，动辄6GB，安装介质的下载非常费时，而且Oracle目前不支持用下载工具下载，只能在网页里直接保存。建议使用IE浏览器下载，尝试过Chrome，Firefox下载的软件都有不完整的情况出现。近期遇到的几个安装时的错误案例，都是跟下载的软件不完整有关的。因此建议在安装前务必先确认安装软件是正确、完整的。可以在下载界面查看“view...
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HP-UX 彻底被Oracle抛弃
Oracle database 11.2将是HP-UX 平台的最终版本，包括Itanium和PA-RISC架构。将来就只剩下AIX、Linux、Solaris了。 参考官方文档： Oracle Database Support on the Itanium Processor Architecture [ID 1307745.1] Support Status for Oracle Database...
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Oracle Database 11.2.0.3发布，补丁下载和文档已更新
Oracle® Database Patch Set 11g Release 2 (11.2.0.3) Patch Set 2在经过1年的等待后终于发布，这次带来了Linux x86, x86-64版本的软件，其他平台的会在10月份发布，官方文档已经更新到最新。 Related posts: Oracle 11.2.0.2新特性 Oracle Metalink reference –...
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Easy way to install Oracle Database on Oracle Linux
Overview Oracle is pleased to announce the general availability of the Oracle RDBMS Server 11gR2 Pre-Install RPM for Oracle Linux 6 x86_64 (64 Bit) architecture. This package replaces the previous...
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