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Friday, August 26, 2011

How mature is your datacenter?

By David Chernicoff | August 25, 2011, 6:39am PDT

It should come as no surprise that the changes in technology and business needs that impact the datacenter are coming along at a fast and furious pace. With the term 'green" being applied to just about everything related to the datacenter, operators are continually looking for ways to improve their business processes and to evaluate what their future needs will be, not just in terms of performance and price, but also using metrics that were unthought-of of a decade ago, such as sustainability, carbon impact, and energy efficiency.

With the's Data Center Maturity Model, a datacenter operator can find the context for all areas of their datacenter operation. Despite it's name, the metric isn't one that determines where you are in the lifecycle of your datacenter, but rather one which determoines how well situated your current datacenter is in terms of meeting the current standard for an efficient operation and how well positioned it is for the future.

The metric considers all areas of datacenter operation from facilities to IT loads, and allows the user to determine where in the datacenter operations world their facility is on, above, or behind the curve.  It does this by providing infomatioon that was derived by starting with a datacenter implementation whichis strictly olkd school and has put no effort into future proofing or even meeting current standards that define a green and business effective datacenter, then builds on that base through five levels of datacenter maturity that show you where your facility is in terms of current datacenter trends.

The evaluative criterion, which is fairly detailed, is broken down into five levels:

Level 0: This is the baseline level. Little to no progress has been attempted or made in m oving the datacenter towards being a more efficient and greener facility.

Level 1: At this level, management is aware of the current best practices for their datacenter and has begun to implement policies and planning that will bring them in line with current standards.

Level 2: At this level, the facility is doing a good job meeting current best practices standards for their day to day operations.

Level 3/Level 4: Ath these levels steps are being taken to look towards the future, with changes being made to the datacenter that reflect future trends, standards, and long term goals.

Level 5: Visionary - Five years away. At his level the datacenter is going far beyond simply meeting the current best practices standard and is actively implementing and pursuing cutting edge technologies and strategies that are going to be the driving forces projected in datacenter technologies in the near future.

When you take a look at the DCMM chart you can see that not every aspect of your datacenter is likely to fit cleanly into a well-defined niche, but the model does give you a good idea of where all aspects of your datacenter operation stand, relative to planning and the future, and for that reason alone, it's worth a good look.
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Mengenal Data Center Maturity Model

The Green Grid has developed the Data Center Maturity Model (DCMM) and supporting white paper  to outline capability descriptors by area such that users can benchmark their current performance, determine their levels of maturity, and identify the ongoing steps and innovations necessary to achieve greater energy efficiency and sustainability, both today and into the future.  The maturity model touches upon every aspect of the data center including power, cooling, compute, storage and network. The levels of the model outline current best practices and a 5-year roadmap for the industry.

DCMM - Full Model
DCMM - All Individual Sections in Zip File
DCMM - Compute Section
DCMM - Cooling Section
DCMM - Management Section
DCMM - Network Section
DCMM - Other Facility Section
DCMM - Other IT Section
DCMM - Poster (Standard E)
DCMM - Poster (A0)
DCMM - Power Section
DCMM - Storage Section

Download lengkap disini:


AXIS Network Video Surveillance System memiliki banyak kelebihan dan memberikan banyak fungsi yang tidak dimiliki oleh Analog Video Surveillance System. Kelebihannya termasuk akses secara remote, kulaitas gambar superior, event management and kemampuan intelligent video, sangat mudah diiintegration dengan system lain.
  1. Akses secara remoteAkses secara remote
  2. High Image QualityHigh Image Quality
  3. Event Management and Intelligent VideoEvent Management and Intelligent Video
  4. Future-proof integrationFuture-proof integration
  5. Skalabel dan fleksibelSkalabel dan fleksibel
  6. Cost-EffectivenessCost-Effectiveness

Remote accessibility

Network cameras and video encoders can be configured and accessed remotely, enabling multiple, authorized users to view live and recorded video at any time and from virtually any networked location in the world. This is advantageous if users would like a third-party company, such as a security firm, to also gain access to the video. In a traditional analog CCTV system, users would need to be at a specific, on-site monitoring location to view and manage video, and off-site video access would not be possible without such equipment as a video encoder or a network digital video recorder (DVR). A DVR is the digital replacement for the video cassette recorder.

High image quality

In a video surveillance application, high image quality is essential to be able to clearly capture an incident in progress and identify persons or objects involved. With progressive scan and megapixel technologies, a network camera can deliver better image quality and higher resolution than an analog CCTV camera.
Image quality can also be more easily retained in a network video system than in an analog surveillance system. With analog systems today that use a DVR as the recording medium, many analog-to-digital conversions take place: first, analog signals are converted in the camera to digital and then back to analog for transportation; then the analog signals are digitized for recording. Captured images are degraded with every conversion between analog and digital formats and with the cabling distance. The further the analog video signals have to travel, the weaker they become.
In a fully digital IP-Surveillance system, images from a network camera are digitized once and they stay digital with no unnecessary conversions and no image degradation due to distance traveled over a network. In addition, digital images can be more easily stored and retrieved than in cases where analog video tapes are used.

Event management and intelligent video

There is often too much video recorded and lack of time to properly analyze them. Advanced network cameras and video encoders with built-in intelligence or analytics take care of this problem by reducing the amount of uninteresting recordings and enabling programmed responses. Such functionalities are not available in an analog system.
Axis network cameras and video encoders have built-in features such as video motion detection, audio detection alarm, active tampering alarm, I/O (input/output) connections, and alarm and event management functionalities. These features enable the network cameras and video encoders to constantly analyze inputs to detect an event and to automatically respond to an event with actions such as video recording and sending alarm notifications.
Setting up an event trigger using a network camera’s user interface.
Screenshot from the IP camera's user interface
Event management functionalities can be configured using the network video product’s user interface or a video management software program. Users can define the alarms or events by setting the type of triggers to be used and when. Responses can also be configured (e.g., recording to one or multiple sites, whether local and/or off-site for security purposes; activation of external devices such as alarms, lights and doors; and sending notification messages to users).

Easy, future-proof integration

Network video products based on open standards can be easily integrated with computer and Ethernet-based information systems, audio or security systems and other digital devices, in addition to video management and application software. For instance, video from a network camera can be integrated into a Point of Sales system or a building management system.

Scalability and flexibility

A network video system can grow with a user’s needs. IP-based systems provide a means for many network cameras and video encoders, as well as other types of applications, to share the same wired or wireless network for communicating data; so any number of network video products can be added to the system without significant or costly changes to the network infrastructure. This is not the case with an analog system. In an analog video system, a dedicated coaxial cable must run directly from each camera to a viewing/recording station. Separate audio cables must also be used if audio is required. Network video products can also be placed and networked from virtually any location, and the system can be as open or as closed as desired.


An IP-Surveillance system typically has a lower total cost of ownership than a traditional analog CCTV system. An IP network infrastructure is often already in place and used for other applications within an organization, so a network video application can piggyback off the existing infrastructure. IP-based networks and wireless options are also much less expensive alternatives than traditional coaxial and fiber cabling for an analog CCTV system. In addition, digital video streams can be routed around the world using a variety of interoperable infrastructure. Management and equipment costs are also lower since back-end applications and storage run on industry standard, open systems-based servers, not on proprietary hardware such as a DVR in the case of an analog CCTV system.
Furthermore, Power over Ethernet technology, which cannot be applied in an analog video system, can be used in a network video system. PoE enables networked devices to receive power from a PoE-enabled switch or midspan through the same Ethernet cable that transports data (video). PoE provides substantial savings in installation costs and can increase the reliability of the system. More on Power over EthernetPower over Ethernet.
A system that uses Power over Ethernet.
Illustration of a system using Power over Ethernet (PoE)

Thursday, August 25, 2011

Mengenal jenis-jenis RAID

Dalam beberapa kali pekerjaan, client meminta untuk dipasangkan RAID. RAID adalah singkatan dari 
Redundant Array of Inexpensive (Independent) Disks. Ada beberapa tipe RAID yang sering digunakan, diantaranya: RAID:

  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 10 (also known as RAID 1+0)
This article explains the main difference between these raid levels along with an easy to understand diagram.

In all the diagrams mentioned below:
  • A, B, C, D, E and F – represents blocks
  • p1, p2, and p3 – represents parity


Following are the key points to remember for RAID level 0.
  • Minimum 2 disks.
  • Excellent performance ( as blocks are striped ).
  • No redundancy ( no mirror, no parity ).
  • Don’t use this for any critical system.


Following are the key points to remember for RAID level 1.
  • Minimum 2 disks.
  • Good performance ( no striping. no parity ).
  • Excellent redundancy ( as blocks are mirrored ).


Following are the key points to remember for RAID level 5.
  • Minimum 3 disks.
  • Good performance ( as blocks are striped ).
  • Good redundancy ( distributed parity ).
  • Best cost effective option providing both performance and redundancy. Use this for DB that is heavily read oriented. Write operations will be slow.


Following are the key points to remember for RAID level 10.