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Managing Virtual Machine Sprawl
Virtualization is great; that much we can all agree on. Virtual machines (VMs) can tend to grow out of control, however, now that it’s so easy to create them. This should not be all that surprising, but apparently many small to medium businesses are also dabbling in VMs, and they are suddenly overwhelmed by the VM growth. Each VM is another server that an administrator must manage. Security updates must be applied and global configuration changes now need to be propagated to all these new machines. While it’s easy to create 3-4 (or more) servers on one physical piece of hardware, you’ll certainly struggle if you aren’t already set up to scale. |
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Is Cheap Web Hosting Worth It? Whether you are a small business, fortune 500, or in-between, Web hosting providers may have something to offer. Web hosting is extremely competitive, and not many companies survive. Once the need for Web hosting services is established, you need to do some research to determine whether a specific hosting company is a good fit. |
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Practical VM Architecture: Highly Available Now that we understand how to handle managing VM sprawl, and we know we need to scale an application horizontally, let's take the next step and build a VM infrastructure that's capable of fault-tolerant operation. |
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Built-in Security with Cisco IPS Another new feature available in IOS (12.3) is Cisco’s Intrusion Prevention System. An IDS has been part of IOS for a long time, but they recently took it a step further. As part of its Self-Defending Network campaign, Cisco realized that an IPS should be integrated into the network fabric. We’ll explain what this means, and show you how to implement it. |
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Understanding Linux Virtual Memory
Virtual memory is one of the most important, and accordingly confusing, piece of an operating system. Understanding the basics of virtual memory is a requisite to understanding operating system performance. Beyond the basics, a deeper understanding allows a systems administrator to interpret system profiling tools better, leading to quicker troubleshooting and better decisions.
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Practical Architectures: Scaling with VMs Virtualization allows you to better utilize your servers, and effectively increasing that utilization can be a big cost-saver. Now that it is so easy to duplicate server instances using virtual machines, it makes sense to start talking about the best way to take advantage of this new ability. Improved application availability and performance can now be realized without many of the complications that used to plague us. How you go about it, however, may vary depending on the application in question. |
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