Frequently asked questions

Do you have a question about our service or about the meaning of certain terms? Check out our frequently asked questions below. Is the answer you’re looking for not listed? Please do not hesitate to contact us.

Choosing the Amsterdam datacenter of The Datacenter Group has a couple of advantages. The datacenter is readily accessible by car and public transport. The datacenter is just 10 minutes away from Schiphol Airport, and there are a couple good hotels within walking distance. This is especially handy if you’re flying in technical personnel from abroad.

Placing servers in a datacenter in the Netherlands is always a good choice due to the excellent technical infrastructure and the stable political climate. In addition, in the Netherlands everyone needs to adhere to strict laws and regulations with regards to privacy, which means your data is off limits to unauthorized persons.

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Choosing the Delft datacenter of The Datacenter Group has a couple of advantages. The datacenter is readily accessible by car and public transport. You can quickly get to The Hague and Rotterdam from the datacenter. Within twenty to thirty minutes you can be at Rotterdam Airport or Schiphol Airport. Almost as fast as from Schiphol Airport to Amsterdam.

Placing servers in a datacenter in the Netherlands is always a good choice due to the excellent technical infrastructure and the stable political climate. In addition, in the Netherlands everyone needs to adhere to strict laws and regulations with regards to privacy, which means your data is off limits to unauthorized persons.

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Choosing the Rotterdam datacenter of The Datacenter Group has a couple of advantages. The datacenter is readily accessible by car and public transport. The datacenter is located right next to the Rotterdam The Hague Airport and within fifteen minutes you can be at Rotterdam Central Station.

Placing servers in a datacenter in the Netherlands is always a good choice due to the excellent technical infrastructure and the stable political climate. In addition, in the Netherlands everyone needs to adhere to strict laws and regulations with regards to privacy, which means your data is off limits to unauthorized persons.

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Choosing the Utrecht datacenter of The Datacenter Group has a couple of advantages. The datacenter is readily accessible by car and public transport. The datacenter is situated near the Everdingen A2/A27 junction.

Placing servers in a datacenter in the Netherlands is always a good choice due to the excellent technical infrastructure and the stable political climate. In addition, in the Netherlands everyone needs to adhere to strict laws and regulations with regards to privacy, which means your data is off limits to unauthorized persons.

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We speak of a twin datacenter solution when an IT environment is spread out over two geographically separate locations. The IT environments themselves are identical on both locations. The advantage to a setup like this is that should something happen at one of the datacenters, the IT environment can keep functioning. The twin datacenter concept is often used for business-critical applications that simply cannot fail. With this setup, failure is as good as impossible. The Datacenter Group has two datacenters at its disposal, in Amsterdam and Delft, and these are also separate entities. Therefore, businesses who wish to make use of the twin datacenter concept can call on The Datacenter Group.

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Remote hands service is a service that can be offered by a datacenter. A datacenter always has qualified technical personnel on staff that is available 24/7. This personnel can conduct certain technical jobs on the server(s) of the client. Think for example of rebooting a server or replacing a hardware part. The advantage to this is that the client doesn’t have to make the trip to the datacenter. A client can save a lot of time by using the remote hands service. A datacenter that offers remote hands service, in fact offers added value to the client. Depending on choice of SLA there is always a response to a ticket within a certain time frame.

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Uptime indicates the availability of resources within a datacenter. This is one of the guarantees a datacenter has to offer its clients, otherwise their ‘raison d’être’ is brought into question. With resources we mean the power supply, cooling installation, and internet connection. Uptime is always expressed in a percentage in relation to time. An uptime percentage of 99,98% means that over the span of one year a datacenter was unavailable for just 0,02% of the time. There are datacenters, such as The Datacenter Group, who manage to realize an uptime of 100% over the past couple of years.

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A green datacenter runs entirely on sustainable energy sources. Think for example of wind or solar energy. The datacenters of The Datacenter Group run entirely on wind energy, and can thus be qualified as green datacenters.

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A datacenter contains servers that run business-critical applications that need to be available 24/7. In case of calamity a client needs to have quick access to their server(s). Also in case of nightly maintenance the datacenter needs to be open 24/7. The datacenter itself also needs to remain functioning. That’s why there is always personnel present that can respond immediately should there be a disruption or malfunction. At The Datacenter Group we have staff on site 24x7x365.

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The Uptime Institute has defined the Tier Standard. A Tier Standard describes the availability of functioning hardware within a datacenter. There are four different TIERS: I, II, III, and IV. The Datacenter Group falls into the TIER III category and offers in accordance an availability guarantee of at least 99,98%. The 99,98% availability guarantee is the highest availability guarantee that a datacenter can offer in the Netherlands.

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An uptime of 100% means that resources are available 365 days a year, 24 hours a day. Resources in this context refers to power supply, internet connection, cooling installation and hardware. The Datacenter Group has realized an uptime of 100% since 2007.

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The cloud is a collective term and basically means that hardware, software, and data are available through the internet. Servers that facilitate cloud services are usually located in datacenters. With regards to the cloud concept we differentiate between private, public, and hybrid cloud. In case of a public cloud it concerns services offered by commercial businesses. Clients share the cloud capacity of a public cloud provider. In case of a private cloud a business uses their own servers that are connected to the internet. In a private cloud resources are not shared with other businesses. A private cloud can be housed both on premise as well as within a datacenter. We speak of a hybrid cloud when a business uses a combination of private and public cloud. For example, many businesses use applications that run in the public cloud, while confidential (business)data is stored in a private cloud environment.

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In exchange for payment, a cloud provider, also called a cloud supplier, offers services that are facilitated by the cloud. A cloud provider offers services from their own technical infrastructure. The servers of a cloud provider are located in a datacenter and have a fast internet connection. This means that a buyer of cloud services does not have to invest in hardware. The services offered by the cloud provider are usually scalable and purchased on a monthly basis. The client only has to pay for the resources they need. There is a wide variety of cloud services, some examples are: storage (backup services), applications (Software as a Service (SaaS)), and client databases (Customer Relationship Management (CRM)).

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A datacenter, also called computing center, offers possibilities for placing hardware in a secure environment, equipped with all facilities. Clients can connect their server(s) to the internet through the connections present. Servers produce heat, and through cooling a datacenter ensures the temperature doesn’t go too high. Access to a datacenter is strictly regulated. Only authorized personnel are allowed inside. A datacenter contains servers with generally business-critical applications that need to be available 24 hours a day. Therefore, the datacenter needs to always be up and running. This is why a datacenter is staffed by technical personnel 24/7. Clients also usually have 24/7 access to their servers in the datacenter. To prevent power supply issues, a datacenter has emergency power available in the form of a UPS and (diesel)generator.

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A rack is a steel cabinet in which servers are placed. In most cases a rack is 19 inches wide and varies in height. Both at the front and back a rack is accessible through a lockable door, which is equipped with small holes to promote heat dissipation. A rack has several power feeds. Servers can be mounted in a rack in different ways. In many cases a server is mounted inside a rack though a rail system. This has the advantage of being able to pull the server from the rack like a drawer. In this case an engineer only needs to remove the top layer of the server to replace a part. Servers can also be mounted via a click system or bolts. A rack is always equipped with a lock, to prevent unauthorized personnel from accessing the servers.

With regards to the dissipation of hear, air circulation within a rack is essential. This is why it’s important to organize the cables using cable binders (tie rips). A spaghetti of cables sticking out of the back of the rack needs to be prevented at all costs, because this hinders the dissipation of heat. A rack’s cables are generally connected to other equipment via a raised floor. It also happens that racks are connected to other equipment via a gutter system hanging from the ceiling. At The Datacenter Group, standard racks are 60 cm wide, 120 cm deep and 200 to 220 cm tall. Other measurements are also possible.

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U represents a height of 1.71 inches (44,45 mm). This unit it used for partitioning servers in a rack. The height of a server is always expressed in an amount of U. The height of a server can vary. A server with a height of 1U is sometimes called a pizza box amongst engineers. A server rack with a height of 19U can fit 19 servers with a height of 1U. At The Datacenter Group standard racks are 46U. Other measurements are also possible.

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A suite is a closed space in a datacenter that houses the servers of a client. Often this concerns a cage construction equipped with access door and a sturdy lock. The suite contains racks with the client’s servers inside. A suite is almost always equipped with camera surveillance so there is permanent insight as to who is inside.

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In a datacenter, servers are mounted inside racks. Rackspace is the amount of space in a rack. A rack is generally 19 inches wide, though other sizes do exist. The height of a rack is always indicated by the amount of U (1.75 inches or 44,45 mm). The height of a server is also measured in this unit. In this way a datacenter can quickly calculate how many servers fit inside a rack. The depth of a rack can also differ. An extra deep rack usually has the preference of technicians, because this offers extra space to clean up the cabling at the back of the rack, which in turn has a positive effect on the dissipation of heat.

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A private cage is a sealed steel cage in which one or more racks are situated. Only the client has access to their private cage. in some cases, in coordination with the client, the datacenter can also have access to the private cage. A business often chooses a private cage when the servers are running business-critical applications. In case of a private cage, sabotage is impossible because due to the steel cage construction other people do not have access to the servers.

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Emergency power is the power that is automatically activated should the regular power network fail. Emergency power consists of two parts: the UPS and the power generator. A UPS (Uninterruptible Power Supply) consists of a series of batteries and activates the moment power supply fails. Due to limited capacity a UPS can only hold out for a short while. At some point the emergency power generator, which normally runs on diesel, will take over. As long as a generator has enough fuel it can provide the datacenter with enough power. Some datacenters, such as The Datacenter Group, even have two emergency power generators on site. The moment one of the two generators gives out, the other can take over.

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A UPS (Uninterruptable Power Supply) ensures that when the grid voltage drops, the servers will continue to receive power. A UPS consists of a series of batteries that can supply the entire datacenter with power for a short while. Due to the finite capacity a generator will take over from a UPS. A datacenter will always ensure that the UPS installation is fully charged, so it can do its job in case of calamity.

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An emergency power generator takes care of the power supply in case the regular power feed fails. An emergency power generator is normally equipped with a diesel engine. As long as enough diesel remains available, an emergency power generator can provide unlimited power to the datacenter. A datacenter with emergency power generators usually has tanks with diesel oil in storage. Often special contracts are made with diesel suppliers, to make sure that in case of calamity, the datacenter can remain up and running.

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There are two ways in which datacenters can calculate a client’s power usage. With the first method they calculate the power cost per KWh (kilowatt hour). A client pays for what they have used. With the second method the amount of ampere (A) is used to calculate the costs.

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Green power is generated from sustainable energy sources. Think of wind, water, and the sun. The advantage of green power is that the generation of it is done completely without CO2. The power supply of The Datacenter Group is generated entirely sustainable through wind energy. This is an even better choice for the people and our planet, because although green power is a combination of biomass, hydro-, sun- and wind energy, power from wind energy is cleaner and most importantly, infinite. In addition, no waste materials or harmful substances are generated when producing wind energy.

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Redundant means that there are extra resources available in case of power outage or malfunction. Think of hardware, power supply, cooling, and internet connection. To keep downtime and power outages to a minimum, it’s important that a datacenter has redundant resources. Should a particular resource fail, then these extra resources can take over. The Datacenter Group have also applied redundancy to several resources, such as emergency power.

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N stands for the amount of resources (power, backup and cooling, etc) that are needed to have a fully occupied datacenter function. N is not redundant.

N+1 means that an extra part is added in case of calamity. In practice, the 1:4 ratio is applied. For example: a datacenter has five UPS installations. Only four are needed to keep the datacenter operational. When one UPS fails, the extra UPS can step in, as it functions as a backup in case one of the four UPS installations fails. With N+1 a datacenter is prepared for malfunctions, power outages and disruptions, but it is not an entirely redundant system.

2N means that there is an entirely mirrored system. For every part in the datacenter an extra identical copy is available. In comparison with N+1, 2N ensures more certainty in the area of redundancy. Should something fail, then in all cases there is a spare part available, ensuring the datacenter can keep running.

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Servers in a datacenter need to have access to an internet connection. A datacenter provides the primary facilities to place severs in a secured environment with all necessary technical specifications. A carrier is a company that installs an internet connection to the datacenter, to which clients can connect their servers. In practice these are almost always optic fiber connections, because this type of connection can handle a high capacity of data traffic. In addition, optic fiber is synchronous which means that bandwidth is the same size both up and down. At The Datacenter Group you can choose from over 30 different carriers.

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At a carrier and cloud neutral datacenter, also called a network neutral datacenter, the client has a choice of different carriers, also called optic fiber providers. The advantage to this is that the client can choose to apply a redundant solution. This means that in practice their servers can be connected to optic fiber networks belonging to different parties. Should one connection fail, another provider can take over. As a result it is virtually impossible to lose connection to the internet. The presence of several carriers generally has a positive effect on price. If a datacenter works with several carriers, the optic fiber connections of the different providers often enter the building at different locations. This reduces the chance that all optic fiber cables could be disconnected simultaneously due to for example one unfortunate excavator incident. The Datacenter Group is a carrier neutral datacenter and that means you can choose between a variety of carriers. View The Datacenter Group’s carriers here.

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A datacenter equipped with certifications makes all the difference. It means that they comply with requirements described within the ISO certifications. A datacenter that wants to acquire a certain ISO certification is forced to take a critical look at their own systems and procedures. As soon as a datacenter has adjusted the systems and procedures to match the requirements of the ISO certification, an independent bureau will conduct an audit. The bureau will check whether the datacenter is indeed working according to the ISO certification requirements. Should this be the case, the datacenter will be granted the respective ISO certification. However, a datacenter that has obtained a certain certification does not get to relax. Periodic checks will continue to take place to ensure the datacenter is still upholding the standards of the certification.

A datacenter that has obtained certifications shows that they have thought deeply about all aspects of their service. The datacenter functions according to recognized standards and can provide a certain level of quality. The availability of certifications makes it easier for clients to compare different datacenters in an objective way. Click here to view the certifications of The Datacenter Group.

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ISO 27001 is the international certification for information security. For clients it is important that their data is stored securely within the datacenter. With ISO 27001, security, availability, and integrity of data is the main focus. The ISO 27001 standard applies to the Information Security Management System (ISMS).

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The ISO 14001 is the internationally accepted standard for an environment management system. The ISO 14001 describes the requirements for an environment management system. A business that holds an ISO 14001 certification has paid attention to environmental aspects that are related to their business operations. By complying with the ISO 14001 requirements a business can realize environmental targets. The environment management system is based on the Plan-Do-Check-Act (PDCA) cycle.

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The ISO 9001 standard is a set of rules applied to a management system. The ISO 9001 describes the necessary management techniques to adhere to the wants and needs of clients. It is the international standard for quality management systems. A business that holds an ISO 9001 certification complies with the strict international requirements for quality management. An independent external party will determine whether the organization’s quality management systems comply with the standards. The certification is also describes as: say what you do, do as you say, and prove it.

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Since 2008 care organizations within the healthcare sector need to adhere to the standard for information security. It’s important that medial data is stored securely and this is why NEN 7510 was brought into existence. Datacenters can also achieve a certification for this standard. The NEN 7510 standard was designed by the Dutch Normalization Institute. NEN 7510 controls affairs surrounding the exchange of patient data. Procedures specific to the access of patient data are also included in the NEN 7510 standard.

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PCI DSS stands for Payment Card Industry Data Security Standard. It concerns an international security standard that was composed by credit card companies. The standard was designed to prevent credit card fraud. The PCI DSS sets requirements for processing, sending, and the storing of credit card details. These requirements also apply to datacenters in which servers are placed that process credit card transactions.

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A datacenter can cool with air in different ways. The Datacenter Group has developed its own climate control system for the Amsterdam and Delft locations, and as a result belongs to one of the most energy-efficient datacenters in the Netherlands. With this system, warm air is removed and cold outside air is pulled inside. To promote the longevity of the hardware it is important that the outside air being pulled inside is clean. That’s why the air cooling system features a special filter. The pulled air has a temperature of 24 degrees Celsius. This temperature guarantees the maximum lifespan for hardware. On the days the outside air is over 24 degrees, The Datacenter Group automatically switches to adiabatic cooling, also called evaporation cooling. This happens through cardboard grids that are sprinkled with water. The evaporation of this water pulls heat from the air. Because the hot and cold alleys are separated, the two air flows do not touch each other. The air treatment installation of The Datacenter Group has been redundantly installed.

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