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VM 磁盘空间扩容引起的一些问题 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...拟机迁移到其他的LUN空间上
然后在存储上做扩容和收缩操作
完成操作之后 问题来了
ESX1 ESX2可以在设备中可以认到LUN 60 LUN80 容量显示正确，但不能正确识别文件格式。在ESX1的数据储存中认到LUN60 LUN80的准确容量...
Context switches much slower in new linux kernels
We are looking to upgrade the OS on our servers from Ubuntu 10.04 LTS to Ubuntu 12.04 LTS. Unfortunately, it seems that the latency to run a thread that has become runnable has significantly increased from the 2.6 kernel to the 3.2 kernel. In fact the latency numbers we are getting are hard to belie...
Is .NET/Mono or Java the better choice for cross-platform development? [closed]
...e portable. Mono isn't implemented everywhere, and it lags behind the Microsoft implementation significantly. The Java SDK seems to stay in better sync across platforms (and it works on more platforms).
I'd also say Java has more tool availability across all those platforms, although there are ...
App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎...
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SQLite 拓展
此SQLite 拓展由中文网开发及维护，基于开源 aix-SQLite ...
HTML 5 tag vs Flash video. What are the pros and cons?
...y out; <video> support is ubiquitous, including mobile devices. Almost anything that Flash could do, HTML can now do too. HTML won, Flash lost. If you're pondering on how to embed video in your page, just use <video> and don't give it a second thought. This question is only preserved...
C++使用OLE/COM高速读写EXCEL的源码 - C/C++ - 清泛网 - 专注C/C++及内核技术
C++使用OLE/COM高速读写EXCEL的源码VC对Excel表格的操作的方法有多种，如：通过ODBC数据库实现，通过解析Excel表格文件，通过OLE COM的实现。本文主要研究通过OLE COM实现对Excel表格的操作。另外，本文主代码中汇聚各网友的智慧进行...
搭建高可用mongodb集群（二）—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...
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注意linux生产环境不能安装32位的mongodb，因为32位受限于操作系统最大2G的文件限制。
#解压下载的压缩包
tar xvzf mongodb-linux-x86_64-2.4.8.tgz
4、分别在每台机器上启动mongodb
/data/mongodbtest/mongodb-linux-x86_64-2.4.8/bin/mongod...
Command to get time in milliseconds
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date +%s%N returns the number of seconds + current nanoseconds.
Therefore, echo $(($(date +%s%N)/1000000)) is what you need.
Example:
$ echo $(($(date +%s%N)/1000000))
1535546718115
date +%s returns the number of seconds since the epoch, if that's useful.
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Difference between CR LF, LF and CR line break types?
I'd like to know the difference (with examples if possible) between CR LF (Windows), LF (Unix) and CR (Macintosh) line break types.
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adding directory to sys.path /PYTHONPATH
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You could use:
import os
path = 'the path you want'
os.environ['PATH'] += ':'+path
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