31.3.14
29.3.14
28.3.14
26.3.14
25.3.14
开源网管系统比较
http://os.51cto.com/art/201307/402538_all.htm
在本系列文章中，我们将一同剖析四款高人气开源产品--Nagios Core 3.5、NetXMS 1.2.7、OpenNMS 1.10.9以及Zenoss Core 4.2。四款产品都已经相当成熟，足以提供与其它企业级同类方案相媲美的综合性监控能力，同时拥有良好的社区支持体系。
四款产品都提供管理、性能监控以及网络设备警示与报告功能，其作用范围涵盖服务器、路由器、交换机、打印机、UPS、网络站点、业务应用程序以及移动设备等等。监控功能可以简单起效，用户可以像使用PING请求那样利用SNMP（即简单网络管理协议）或者本地代理对单一设备进行全面管理。
此次参与评述的四款产品经实测全部支持SNMP及其它通用型协议，包括WMI、HTTP、SMTP、SSH以及XML。尽管其中两款产品只能用于特定操作系统，但四者全部可以实现跨平台IT基础设施监控（本质上说可作用于任何拥有IP地址的设备）。它们支持的功能包括自动识别、SNMP、可阅读系统日志、触发器/警报设置、Web应用程序、分布式监控（即负载平衡）、映射、IPv6（只有NetXMS不支持IPv6）以及库存追踪。
四款产品还提供基本而全面的基础设施监控功能，而且很少甚至完全不需要额外硬件、内存以及存储机制作为监控环境的支持基础。在本次评述中，我们将从安装便捷性、配置便捷性、管理能力、多平台支持能力、报告机制及总体可用性等几个角度做出横向比较。
21.3.14
20.3.14
Carrier Ethernet
http://en.wikipedia.org/wiki/Carrier_Ethernet
Carrier is a marketing term for extensions to Ethernet to enable telecommunications network providers ("common carriers" in US industry jargon) to provide Ethernet services to customers and to utilize Ethernet technology in their networks.
Line Card
- http://en.wikipedia.org/wiki/Line_card
- http://www.pcmag.com/encyclopedia/term/46105/line-card
- http://www.cscprinters.com/line-card.html
- http://www.cscprinters.com/line-card.html
The Concept of OTT
http://en.wikipedia.org/wiki/Over-the-top_content
Over-the-top content (OTT) refers to delivery of video, audio and other media over the Internet without a multiple system operator being involved in the control or distribution of the content. The provider may be aware of the contents of the Internet Protocol packets but is not responsible for, nor able to control, the viewing abilities, copyrights, and/or other redistribution of the content. This is in contrast to purchase or rental of video or audio content from an Internet service provider (ISP), such as pay television video on demand or an IPTV video service, like AT&T U-Verse. OTT in particular refers to content that arrives from a third party, such as NowTV, Netflix, WhereverTV, Hulu, WWE Network, RPI TV or myTV, and is delivered to an end user device, leaving the ISP responsible only for transporting IP packets.
An online video distributor (OVD) is defined as "any entity that offers video content by means of the Internet or other Internet Protocol (IP)-based transmission path provided by a person or entity other than the OVD."[1]
Over-the-top messaging refers to a similar idea, where a third party provides instant messaging services as an alternative to text messaging services provided by a mobile network operator.[2]
Consumers can access OTT content through internet-connected devices such as desktop and laptop computers, tablets, smartphones including iPhones and Android phones, set-top boxes such as the Roku andGoogle TV smart TVs and gaming consoles such as the Wii, PlayStation 3 and Xbox 360. Consumers can access apps in most app stores.
DTAG announces New Multi-Device OTT Video Acceleration Platform LiveStream Perform With Octoshape [3]
ANTIK Telecom launched its new OTT network under brand SmartTVBox, using their own Juice Media Server HLS streaming platform, on August 1, 2012[5]
Findings from market intelligence firm ABI Research show the OTT video market passed $8 billion in 2012 and is predicted to reach over $20 billion by 2015.[9]
11.3.14
RAV4 Rear Brake Pad Replacement
- http://v.classone.cn/cshow/PBKGVLM3.shtml
- http://www.youtube.com/watch?v=bMg_j5_AGMg
- http://www.youtube.com/watch?v=Mmls5foCor0
- http://www.youtube.com/watch?v=OjrY7G8o99U
- http://www.youtube.com/watch?v=VxLTDtaRCZk
- http://www.rav4world.com/forums/99-4-3-mechanical/105618-replacing-rear-brake-pads.html
- http://www.rav4world.com/forums/96-4-3-general/83979-replacing-back-brake-pads.html
7.3.14
CMDB
http://en.wikipedia.org/wiki/Configuration_management_database
A configuration management database (CMDB) is a repository that acts as a data warehouse for information technology (IT) organizations. Its contents are intended to hold a collection of IT assets that are commonly referred to as Configuration Items (CIs), as well as descriptive relationships between such assets. When populated, the repository becomes a means of understanding how critical assets such asinformation systems are composed, what their upstream sources or dependencies are, and what their downstream targets are.[1]
CMDBs are used to keep track of the state of different things that are normally referred to as assets, such as products, systems, software, facilities, and people as they exist at specific points in time. The maintenance of such state related information allows for things like the reconstruction of such assets, at any point in their existence, as well as for things such as impact analysis, in the cases of root cause analysis or change management.
The IBM ITSM framework describes the use of the CMDB as it is tied to software development and all aspects of an information system as it moves through the Systems development life-cycle.[2]
The Information Technology Infrastructure Library framework, also known as ITIL describes the use of CMDBs as part of infrastructure operations and support. In the ITIL context, a CMDB represents the authorized configuration of the significant components of the IT environment.
A CMDB helps an organization understand the relationships between the components of a system and track their configurations. The CMDB is a fundamental component of the ITIL framework's Configuration Management process. CMDB implementations often involve federation, the inclusion of data into the CMDB from other sources, such as Asset Management, in such a way that the source of the data retains control of the data. Federation is usually distinguished from ETL (extract, transform, load) solutions in which data is copied into the CMDB.
The CMDB records configuration items (CI) and details about the important attributes and relationships between CIs. Configuration managers usually describe CIs using three configurable attributes:
- Technical
- Ownership
- Relationship
A key success factor in implementing a CMDB is the ability to automatically discover information about the CIs (auto-discovery) and track changes as they happen.
CMDBs contain metadata, and thus the concept overlaps with that of a metadata repository which are both used in running large IT organizations. Configuration management addresses how the data is to be kept up to date, which has historically been a weakness of metadata repositories.
Single Pane of Glass
- http://managedview.emc.com/2012/04/a-new-way-of-thinking-about-a-single-pane-of-glass/
6.3.14
NodeJS + ExtJS
- http://cwbuecheler.com/web/tutorials/2013/node-express-mongo/
- http://www.alsonkemp.com/geekery/extjs-4-models-node-js/
- http://devjs.eu/en/ext-js-4-app-with-expressjs-nodejs-and-mongodb-on-the-backend/
- http://www.ibm.com/developerworks/cn/java/j-nodejs/
Subscribe to:
Posts (Atom)