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01_Real Application Clusters Overview - 文档下载 - 清泛网移动版 - 专注C/C++及内核技术
...真正应用集群
ASM管理存储，Oracle自己的文件系统
心跳ip有问题，关闭次节点只留主节点，防止数据混乱
virtual ip 可漂移，private ip 心跳ip，scan ip DNS解析
ntp服务禁用（时间同步服务，Oracle自己有同步）
grid 用户：存储、集群...
01_Real Application Clusters Overview - 文档下载 - 清泛网 - 专注C/C++及内核技术
...真正应用集群
ASM管理存储，Oracle自己的文件系统
心跳ip有问题，关闭次节点只留主节点，防止数据混乱
virtual ip 可漂移，private ip 心跳ip，scan ip DNS解析
ntp服务禁用（时间同步服务，Oracle自己有同步）
grid 用户：存储、集群...
How to open a specific port such as 9090 in Google Compute Engine
...tags=<list-of-your-instances-names> --source-ranges=0.0.0.0/0 --description="<your-description-here>"
This will open the port 9090 for the instances that you name. Omitting --source-tags and --source-ranges will apply the rule to all instances. More details are in the Gcloud documentat...
Should I use Vagrant or Docker for creating an isolated environment? [closed]
... what you want.
Vagrant is a virtual machine manager. It allows you to script the virtual machine configuration as well as the provisioning. However, it is still a virtual machine depending on VirtualBox (or others) with a huge overhead. It requires you to have a hard drive file that can be huge, i...
What is the best way to prevent session hijacking?
...bsite for 5 minutes, they'll have to login again
– elipoultorak
Nov 16 '15 at 11:26
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rgdal package installation
...nswered Aug 17 '14 at 21:44
François PelletierFrançois Pelletier
18311 silver badge77 bronze badges
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创业者：在寻找 不迷茫 - 资讯 - 清泛网 - 专注C/C++及内核技术
...8万，他大呼承受不起。
“现在投资人选项目书都开始用软件选择了。”杨贝明说。据他观察，项目书太多，投资人通过软件设定，直接屏蔽掉他们不喜欢的。另外，来中关村创业大街找项目的真正投资人也已经不多了，大多数...
Deep copying an NSArray
...answered Mar 15 '09 at 9:18
François P.François P.
5,11644 gold badges2929 silver badges3131 bronze badges
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How to swap two variables in JavaScript
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@FrançoisWahl Good point. I think most of the answers here will work and are fairly equivalent. I suppose it's a trade off between temporary variable use, amount of code, and speed.
– showdev
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Java内存泄露原因详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...通过垃圾回收机制完成的。GC为了能够正确释放对象，会监控每个对象的运行状况，对他们的申请、引用、被引用、赋值等状况进行监控，Java会使用有向图的方法进行管理内存，实时监控对象是否可以达到，如果不可到达，则就...