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Redis 的性能幻想与残酷现实 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...态数据
临时缓存数据
后台统计用的流水数据
导致的问题就是当你想扩分片的时候,客户端 Hash 映射就变了,这是要迁移数据的。而所有数据放在一组 Redis 里,要把它们分开就麻烦了,每个 Redis 实例里面都是千万级的 key。
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Why does PHP 5.2+ disallow abstract static class methods?
After enabling strict warnings in PHP 5.2, I saw a load of strict standards warnings from a project that was originally written without strict warnings:
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How to round up a number to nearest 10?
How can we round off a number to the nearest 10 in php?
16 Answers
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Store JSON object in data attribute in HTML jQuery
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If the field contains the JSON from PHP encoding, you might just want to do this instead: htmlspecialchars(json_encode($e)) (idea from Nicolas answer comments).
– CPHPython
Jul 11 '18 at 17:10
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Download File to server from URL
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Since PHP 5.1.0, file_put_contents() supports writing piece-by-piece by passing a stream-handle as the $data parameter:
file_put_contents("Tmpfile.zip", fopen("http://someurl/file.zip", 'r'));
From the manual:
If data [that ...
Select mySQL based only on month and year
...red statements. In short, use whatever method is recommended these days in PHP, to avoid any SQL injection issues.
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How do I catch a PHP fatal (`E_ERROR`) error?
I can use set_error_handler() to catch most PHP errors, but it doesn't work for fatal ( E_ERROR ) errors, such as calling a function that doesn't exist. Is there another way to catch these errors?
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思维导图在快速阅读或是其它学习工作中的作用 - 创意 - 清泛网 - 专注C/C++...
...其它学习工作中的作用思维导图一、人的大脑运用带来的问题您是否经常遇到过这样的情况:1、您买了很多书,可惜很多都没有读?就是有幸读过也掌握不了多少?2、走...
思维导图
一、人的大脑运用带来的问题
您是否经常...
闲扯Nginx的accept_mutex配置 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...新连接,其它的Worker会重新进入休眠状态,这就是「惊群问题」。
Nginx缺省激活了accept_mutex,也就是说不会有惊群问题,但真的有那么严重么?实际上Nginx作者Igor Sysoev曾经给过相关的解释:
OS may wake all processes waiting on accept(...
解决笔记本升级Win10后,色彩变暗颜色偏蓝的问题 - 更多技术 - 清泛网 - 专...
解决笔记本升级Win10后,色彩变暗颜色偏蓝的问题笔记本升级Win10后,色彩变暗颜色偏蓝,调整Win10显示设置中的颜色校准也没有效果,最后通过勾选显卡属性中的色温控制恢复以前Win8.1时的颜...笔记本升级Win10后,色彩变暗颜色...
