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一致性hash和solr千万级数据分布式搜索引擎中的应用 - 大数据 & AI - 清泛...
...数据都是统一的自增id数据,从1~600,分成3堆可以采用 id mod 3的方式。其实在真实环境可能不是这种id是字符串。需要把字符串转变为hashcode再进行取模。
从图中可以看出 1号机器的3、5、9迁移出去了、2好机器的4、6迁移出去了...
Custom HTTP headers : naming conventions
... of today, 20141102 in this slight edit to my answer -- currently using "X-Mod-Pagespeed" to indicate the version of their Apache module involved in transforming a given response. Is anyone really suggesting that Google should use "Mod-Pagespeed", without the "X-", and/or ask the IETF to bless its u...
How can I add reflection to a C++ application?
...our code with macro's/templates or some other source approach (looks ugly)
Modify a compiler such as clang/gcc to produce a database.
Use Qt moc approach
Boost Reflect
Precise and Flat Reflection
The first link looks the most promising (uses mod's to clang), the second discusses a number of techniq...
PHP中9大缓存技术总结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ttpd.conf里进行设置,当然前提是在安装apache的时候要激活mod_cache的模块。
安装apache时:./configure –enable-cache –enable-disk-cache –enable-mem-cache
8、php APC缓存扩展
Php有一个APC缓存扩展,windows下面为php_apc.dll,需要先加载...
Modbus硬件控制01——什么是Modbus - 创客硬件开发 - 清泛IT社区,为创新赋能!
本帖最后由 mzb2012 于 2025-06-19 12:37 编辑
Modbus算是嵌入式领域比较经典一种通信协议,不管你是初学者,还是工作多年的工程师,都很有必要了解一下。1.什么是Modbus?1.什么是Modebus它是一个Bus,即总线协议。比如串口协议、IIC...
解决Scrapy警告:You do not have a working installation of the service_i...
...crapy警告:You do not have a working installation of the service_identity module: 'cannot import name opentype'. You-do-not-have-a-working-installation-of-the-service_identity-module使用scrapy进行爬虫项目的操作时,出现如下错误:从提示错误来看,我们需要安装一个模...
解决Scrapy警告:You do not have a working installation of the service_i...
...crapy警告:You do not have a working installation of the service_identity module: 'cannot import name opentype'. You-do-not-have-a-working-installation-of-the-service_identity-module使用scrapy进行爬虫项目的操作时,出现如下错误:从提示错误来看,我们需要安装一个模...
解决Scrapy警告:You do not have a working installation of the service_i...
...crapy警告:You do not have a working installation of the service_identity module: 'cannot import name opentype'. You-do-not-have-a-working-installation-of-the-service_identity-module使用scrapy进行爬虫项目的操作时,出现如下错误:从提示错误来看,我们需要安装一个模...
解决Scrapy警告:You do not have a working installation of the service_i...
...crapy警告:You do not have a working installation of the service_identity module: 'cannot import name opentype'. You-do-not-have-a-working-installation-of-the-service_identity-module使用scrapy进行爬虫项目的操作时,出现如下错误:从提示错误来看,我们需要安装一个模...
解决Scrapy警告:You do not have a working installation of the service_i...
...crapy警告:You do not have a working installation of the service_identity module: 'cannot import name opentype'. You-do-not-have-a-working-installation-of-the-service_identity-module使用scrapy进行爬虫项目的操作时,出现如下错误:从提示错误来看,我们需要安装一个模...
