1 TH for E C h p your LUS erf orm indivi TER S anc dua e, h l req YSTE igh u M sta ireme bili ty, nts. low pric Hig e. Contabo GmbH Aschauer Straße 32 a München +49 (0) 89 / (0) 89 /
2 Regardless which hardware component might fail or how the number of your web site visitors might increase - your web presence will remain online. Your web site online 24/7 Our hosting experts have spent many months developing and diligently testing multiple failure and data loss scenarios to provide a preconfigured, practically proven, but still extendable and adjustable solution with a precisely defined goal: Your web presence must remain online 24/7 and must be accessible with the highest speed, regardless which hardware component might fail or how the number of your web site visitors might increase. The result? The Contabo Linux Cluster. The Contabo Linux Cluster is built not only to prevent service outages, but also to provide the full capacity of all cluster servers during standard operation. This leads to a reduction of the response times even in the face of increasing load due to an increasing amount of web site visitors or complex applications. With the Contabo Linux Cluster, there are no IT-related boundaries anymore to the growth of your company. 1 2
3 4 in 1 4 in 1 Reliability high availability of your site In the event of a software or hardware related failure on one server, any tasks of the machine are automatically taken up by another server in the cluster. Your web presence therefore will remain available with no interruption of service and the defective server can be looked after without time pressure. All vital services required for this important feature are already preconfigured in a Contabo Linux Cluster. If a machine fails, the rest of the cluster will take up its tasks automatically and independently within milliseconds. Scalability - easy and rapid expansion Capacity requirements of modern IT projects are quite difficult to be planned ahead. If, as a result of a marketing campaign, for instance, the number of new visitors or customers increases heavily, the existing hardware might be pushed to its limits.the Contabo Linux Cluster has been developed with full support for 'Scale Out scalability. It provides easy and efficient methods to add further servers to the cluster in order to enhance performance and capacity. The existing infrastructure does not need to be altered for that and in many instances it is not even necessary to temporarily stop services during the expansion. In practice that means: By setting up additional web or SQL servers, the number of possible simultaneous web site visitors can be increased almost linearly. By adding further hard disks and/or storage servers, the available data storage space can be increased easily. Cost effective upgrading: Inexpensive dedicated servers can be used to extend capacities. 3 4
4 3 Data 4 in 1 4 in 1 4 Load balancing - cost effective Security - utilization of resources don t take a risk In almost all usage scenarios, the capacities of all existing servers can be utilized simultaneously during regular operation. That way, the performance of the servers does not need to lay idle or in hot stand-by until a failure occurs, but instead can be actively used to reduce response times or to increase the number of potential users accessing at the same time. This objective is achieved by a preconfigured load balancing mechanism. The mechanism works on the IP layer and therefore can be used for many applications in a comfortable and easy way. The load balancing is provided by multiple machines so that the load balancing itself does not represent a single point of failure. Data loss is a horrible and dreaded scenario for every large web application. Data which might have been gathered over years could be extinguished in the blink of an eye. Even by using highest quality hard disks, one is never completely safeguarded from mechanical failures. A corrupted file system is another circumstance which might lead to data loss. The Contabo Linux Cluster was developed with a focus on data safety. Your data is not only mirrored on one single server, but rather on multiple systems. Even the complete breakdown of one server would not have an influence on your data. 5 6
5 Solution Solution The Solution: Our results for this test array*: Contabo LAN Managed Switching Web requests per second Required time for 1 Mio. requests Single Server Cluster with two web servers ,12x 108,23 Sek. 50,27 Sek. 2,17x Improvement Apache active Apache active Managed Switching (Internal) MySQL active iscsi active MySQL active iscsi active The above example pictures four servers that are used to make Apache and MySQL available on a redundant level. The web applications are provided to all Apache web servers via iscsi. Further web servers can be added to enhance the capacities without having to change the structure. * test array: Linux , Apache , Intel(R) Core(TM) i7 CPU 860, 2.80GHz, 12 GB RAM 7 8
6 Economic Unbeatable prices We take care of the details: It goes without saying that the experienced staff of Contabo is taking care of each and every detail in accordance with your personal requirements: This includes Assistance and consultation Initial configuration of the servers and the network infrastructure Adjustment of technical parameters in close collaboration with you Permanent, technical service for the cluster Basic installation Configuration of the cluster servers Individual configuration, continuous maintenance, service and care Monthly prices for our dedicated servers within you cluster equal the dedicated server rental charges of our regular offers. 199,- EUR one-time (2-4 servers in total) 499,- EUR one-time (5-20 servers in total) 199,- EUR one-time (per server) Depending on the time investment required for your individual prerequisites Quad Core i7 6-Core X Dual Xeon You can choose the number of servers and the models for the cluster freely. You can select the applicable model from our wide variety of available servers, but you can use your own servers as well, by colocating them in our premises. Do you, for instance, like the four Core i7 configuration as displayed on page 7, but need the 6-Core model as your back end server? No problem, simply select a combination of two Core i7 and two 6-Core servers. 9 10
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