Sunday, June 17, 2018

Mencegah titik panas (hotspot) data center dengan temperature monitoring


Cooling failures and overheated servers have even worse consequences than power failures in most mission-critical data centers. A well-maintained uninterruptible power supply should keep servers operating until generators kick in, power is restored or an orderly shutdown occurs. But in today's world of high-density hardware and elevated operating temperatures, a cooling failure -- even with supposedly redundant air conditioners -- can cause server crashes in seconds. Use data center temperature monitoring to avoid data center hot spots that lead to early hardware failures and unexplainable data errors.

How data center hot spots occur

Hot spots are insidious; they can unknowingly creep up on you until equipment starts to fail or strange data anomalies appear. If you add or move equipment around without real knowledge of the room's cooling capacities, hot spots can occur. In nearly every data center, cooling capacities vary at different locations in the room and at different positions along the rack height. Since hot spots usually occur slowly, they can easily go unrecognized until it gets serious.

Find hot spots through data center temperature monitoring

The easiest and least expensive way to find data center hot spots is with temperature-indicating blanking panels. The multi-colored strips on these panels are heat-sensitive, and provide a visual indication of inlet air temperatures. Mount them near the top, middle and bottom of each rack, or at least in every other rack. Alternatively, mount temperature probes in front of hardware, close to the top, middle and bottom of racks. If you can only afford one per rack, put it in front of the most vulnerable hardware, which is usually the highest server in the rack.
Data center temperature and humidity probes are available as add-ons to smart rack power distribution units, as individual wireless devices and as part of some data center infrastructure management systems. All three offer software options that give real-time graphical displays of temperature conditions throughout the room. Ultimately, you should combine these readouts with computational fluid dynamics (CFD) air flow modeling, which allows you to verify cooling adequacy by simulating the proposed new installation before equipment is even installed.
Many data centers invest in redundant cooling units but don't actually have redundant cooling; sometimes it's just poor design. Some computer room air conditioning units have insufficient knowledge of how air really moves in a data center, causing even worse cooling conditions. In modern designs, redundant units run simultaneously with normal units, but at reduced speed, so you don't realize added servers are stealing redundant capacity until a cooling unit fails or is turned off for maintenance.
Thankfully, servers can tolerate a higher operating temperature for several days with little negative effect. ASHRAE's allowable thermal envelope goes up to 32 degrees Celsius or 89.6 degrees Fahrenheit in emergencies, but marginal redundancy -- combined with poorly planned computing hardware additions -- can cause serious overheating and thermal shutdowns within a short time after a cooling unit has quit.

Prevent data center cooling failures

Some think a solution is placing redundant coolers next to normal coolers in a raised floor design, but that's not dependable. When air emanates from different locations, there will be some difference in air flow pattern when a normal or redundant unit is operating, or when both run together. This seemingly small difference causes data center temperature variations that can result in significant hot spots.

Three causes of hot spots

  • New equipment adds too much heat. This could be due to insufficient cooling capacity, inadequate air flow, or both, but it's an endemic problem and no amount of adjustment is going to solve it.
  • Hardware is installed too high in the rack in an under-floor air facility, particularly one without containment. Air delivered from the floor increases in temperature as it rises, so is warmer than design temperature by the time it reaches the upper equipment. Without containment, hot discharge air recirculates from the backs of the racks and over the tops, where it mixes with air that is already marginally cool.
  • Organizations fail to adjust floor tiles in under-floor cooling environments, or discharge grills in overhead designs, to supply the amount of air needed to cool the added load.

Thermal indicators are a good first step, but it's impractical to turn off cooling units every time hardware changes just to see what overheats. The best way to avoid problems, particularly in redundant designs, is to model the cooling with CFD, which creates a 3D model of the data center, including specific cooling systems and rack heat loads. The program uses this information to solve thousands of complex partial differential equations that form an analysis of the air flow. The model delivers both color-coded graphics and data tables showing air quantity, velocity, temperature and pressure at every point in the room, plus under-floor in raised floor installations. It is then easy to see where extra cooling capacity exists and add new equipment there. It's also easy to fail a cooling unit in the model, rerun the computations, and see how well the redundancy works.

source: https://searchdatacenter.techtarget.com/tip/Dont-get-burned-by-data-center-hot-spots

Thursday, June 14, 2018

Standar Suhu Diruang Server

Standar Suhu Diruang Server

Standar suhu diruang server, server merupakan sebuah sistem komputer yang menyediakan jenis layanan tertentu dalam sebuah jaringan komputer. Server didukung dengan prosesor yang bersifat scalable dan RAM yang besar,dan juga dilengkapi dengan sistem operasi khusus, yang disebut sebagai sistem operasi jaringan. Server juga menjalankan perangkat lunak administratif yang mengontrol akses terhadap jaringan dan sumber daya yang terdapat di dalamnya contoh seperti halnya berkas atau pencetak, dan memberikan akses kepada stasiun kerja anggota jaringan.
Kehandalan server tidak hanya terletak pada kecanggihan teknologi server yang digunakan namun juga dipengaruhi oleh faktor external server itu sendiri, yakni faktor suhu didalam ruangan serta kelembaban ruangan di dalam ruangan server. lebih jauh lagi bila keperluan server terus bertambah sementara luas ruangannya yang juga terbatas.

Standar Suhu Diruang Server

Beberapa hal yang perlu diketahui pada ruang server adalah:
1. Suhu Terlalu rendah berarti boros biaya, terlalu tinggi maka komponen cepat rusak dan yang paling terpengaruh oleh suhu tinggi adalah “HARDISK”.
Posisi pengukuran suhu sangat menentukan validitas data, suhu ruangan sebaiknya 20-25C untuk harddisk, sedangkan utilitas SMART bisa dipakai sebaiknya kurang dari 50C untuk prosesor, utilitas lm-sensors (yang juga bisa mengukur tegangan dari power supply dan kecepatan putaran kipas. Kalau diukurnya diluar chasing, maka data tersebut sangat boleh jadi tidak mencerminkan kondisi suhu komponen sebenarnya.
Yang sering terjadi adalah kalau ternyata suhu pada komponen terlalu tinggi, kadang tidak teratasi dengan cara menurunkan suhu AC di ruangan saja, melainkan perlu kipas tambahan sehingga volume udara dingin yang lewat ke suatu chasing lebih banyak.
Standar Suhu Diruang Server
2. Kelembaban Jika udara yang masuk terlalu lembab maka bisa merusak perangkat ketika terjadi pengembunan, dan jika terlalu kering juga berbahaya karena akan ada listrik statis, inilah sebabnya AC untuk ruang server khusus karena mengatur suhu sekaligus kelembaban udara. Selain menggunakan AC Anda juga perlu memasang sebuah termohygrometer untuk memantau kelembaban yang ideal pada ruangan server.
Kelembaban ruang sebaiknya 40%-55%, walaupun kelihatannya mulai diperlunak batasnya karena faktor penghematan energi.
3. Kebersihan
Kebersihan volume udara yang lewat casing sangat besar, kotoran yang lewat seringkali menempel di lubang saringan atau pada kipas, apabila terlalu banyak kotoran, aliran udara terganggu dan pendinginan tidak efektif. Hal ini juga merupakan salah satu faktor penyebab overheating pada perangkat/komponen server.

Standar Suhu Diruang Server

Kesimpulan : Berapa suhu yang benar dan direkomendasikan? Rekomendasi umum menunjukkan bahwa Anda tidak harus membuat suhu ruangan berada di bawah 10°C (50°F) atau di atas 28°C (82°F). Meskipun hal ini kelihatannya beragam, namun secara umum disarankan untuk menjaga suhu lingkungan sekitar server berkiasr 20-21°C (68-71°F). Untuk menjaga kelembaban pada ruangan server, Anda dapat menggunakan termometer untuk memonitor kondisi suhu dan kelembaban pada ruangan server Anda.
Termometer yang cocok untuk ditempatkan di dalam ruangan server adalah dengan menggunakan Termohygrometer TH95, kenapa? karena TH95 mampu menampilkan suhu, kelembaban, dan waktu. Dapat dipasangkan dengan sensor suhu eksternal sehingga dapat menampilkan suhu di dalam maupun di luar ruangan. Hemat energi dengan tetap menjaga stabilitas dan akurasi pengukuran yang tinggi. Menampilkan sistem jam 12/24 sesuai pilihan. Mendukung satuan suhu Celsius dan Fahrenheit. Dilengkapi fungsi jam alarm terpadu dan fungsi kalender (bulan dan tanggal) serta bisa ditempatkan di meja maupun dinding.
sumber: https://ukur.co.id/standar-suhu-diruang-server/

Sunday, June 3, 2018

Why multi-cloud has to be the end game

Why multi-cloud has to be the end game

Saturday, June 2, 2018

Job Desc IT Outsourcing and Managed Services

Job Desc IT Outsourcing and Managed Services Head / Manager :

Design and deliver support and service solutions for Manages Service customers in line with ITIL and/or industry best practice

Monitoring the effectiveness of the team against SLA/KPI‟s, driving through change as needed to deliver continual service improvement

Ensure operational procedures and practices are well defined, documented and consistently applied

Instil a high performance culture in the team with a focus on team work, service excellence and ownership for resolving customer issues

Identifying and implementing change within the team to ensure it can take on new service offerings

Create project plans, design, and implement solutions including contribute proactively to new service development

Set and cascade business objectives and targets to the team

Manage and develop strategic partnerships with third party suppliers and other internal stakeholders

Provide input into the divisional strategy with particular focus into opportunities to grow and/or enhance the service offered

Solid technical Experience of Data Center with Cloud Computing technologies and solutions

Provide Infrastructure services in all areas needed: storage networking, Operating System, network security, directory services, server virtualization using system backup and restore, system and network monitoring, application installation and configuration


Provide Software as a Services (SaaS) & managed services

Supervise the internal IT support team in delivering daily IT supports for group of companies

To perform related duties and responsibilities as required

Create the maximum company value teaming with the other corporate members.