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SSH Gratis 12, February 2017 best hosting America and Singapore. Free SSH 13 Februari 2017 Malaysia and Vietnam. Differences Virtualization VPS OpenVZ VS KVM. OpenVZ and KVM are two types of virtualization, both have advantages and disadvantages each let's discuss: OpenVZ is container-based virtualization in linux operating system (Operating system-level virtualization). OpenVZ still hanging with the host kernel, so you will not be able to install other operating systems, such as windows and more. In addition, OpenVZ also allows the occurrence over selling (borrowing space HDD or RAM). For example a central server has 32 GB of RAM, then the seller may sell them to 100 buyers with each buyer gets 1 GB of ram, this is certainly going to create nodes (physical server) overload if not in monitoring 1 × 24 hours by an admin.
Account SSH 13, February 2017 Germany and United Kingdom. For example your VPS provider saying that you get 1024 MB dedicated "RAM" and "2048 MB burstable RAM", it means that you are "allocated" to 1024 MB of RAM to your account and up to 2048 MB of extra memory to be used when needed as long as there is available memory resources.
It's named "burstable memory allocation", this can be beneficial if the node (physical server) no over selling, but what would happen if your VPS node occurs over selling? as an easy example in understanding lets say you have 2 user at its nodes in which each user get 1024 MB dedicated RAM and 2048 MB burstable RAM and secondly the user allocated in amount node with 2 GB of physical RAM memory. But what happens if one of the user (user 1) decided to run intensive programs that need 1900MB of ram. Meanwhile, other users (user 2) currently remains unused and only use 100 MB of ram.
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In this case, user 1 will get 1900 MB ram and leaving only 148 MB on a central server. However, if the user 2 then suddenly need 1024 MB dedicated RAM? … Guess what will happen? 2 users will be disadvantaged because the user 1 is currently using most of the RAM on its nodes. Consequently the user 2 site will experience a slowdown severe enough or crash for a while until the available memory back. But this is just one of the flaws with the system virtualization OpenVZ in case of overselling or configuration that is less precise. not all course providers will do over selling, all depends also from the quality of each provider and how the configuration provider and optimize its nodes.
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