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移动端弱网络测试问题总结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
移动端弱网络测试问题总结 因项目需要，在这两个版本开始引入弱网络测试。本文对测试过程中真实遇到的一些有代表性的问题做一下记录和总结。 先介绍一下使用的弱...因项目需要，在这两个版本开始引入弱网络测试。本...
Facebook代码审核工具Phabricator使用指南——Audit用户指南 - 更多技术 - ...
...一次提交。当你认可这次提交时，审核请求会被关闭。
问题提交（Problem Commits）。是指有人在审核过程中对你提交的代码表示担忧。当你消除了他们的疑虑并且所有审核人均对代码表示认可时，问题提交将会消失。
举例
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Possibility of duplicate Mongo ObjectId's being generated in two different collections?
...que ID (please let me know if there are more):
Before this discussion, recall that the BSON Object ID consists of:
[4 bytes seconds since epoch, 3 bytes machine hash, 2 bytes process ID, 3 bytes counter]
Here are the three possibilities, so you judge for yourself how likely it is to get a dupe:
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Get Image Height and Width as integer values?
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@poke: are you really 100% sure?
– Sarfraz
Feb 18 '10 at 5:04
5
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Doctrine - How to print out the real sql, not just the prepared statement?
...trine is not sending a "real SQL query" to the database server : it is actually using prepared statements, which means :
Sending the statement, for it to be prepared (this is what is returned by $query->getSql())
And, then, sending the parameters (returned by $query->getParameters())
and exe...
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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Getting the location from an IP address [duplicate]
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You could download a free GeoIP database and lookup the IP address locally, or you could use a third party service and perform a remote lookup. This is the simpler option, as it requires no setup, but it does introduce additional latency.
One third party service you could use is mine, http://...
Send email using the GMail SMTP server from a PHP page
I am trying to send an email via GMail's SMTP server from a PHP page, but I get this error:
14 Answers
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Fastest way to implode an associative array with keys
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I wonder if this is really the fastest way for the general question. There is some encoding going on in this function. So, if it's not for a URL, is this really faster than array_walk and what if you don't want it encoded?
–...
廉价共享存储解决方案2-drbd+cman+gfs2 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...同时读写可能会有IO异常,导致drbd设备失效
为了解决这个问题则使用 gfs + cman 实现分布式文件锁方案
3.3安装cman
yum –y cman
3.4 gfs集群文件系统
在 /usr/local/drbd-utils-8.9.4/etc/drbd.conf
在配置文件的 net 选项中
all...