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Why shouldn't I add a lot more disk space than I really need to my VM?
Posted by Barry Bahrami on 22 January 2009 09:11 AM
Q: Why shouldn't I add a lot more disk space than I really need to my VE? Isn't a larger disk always better?
A: Too much disk can actually work against you. Your VM's file system is one large virtual volume on the host node - a large file. If your VM's disk is 5G then the file saved on the host node is also 5G. If your VM's disk is 40G then the file saved on the host node is 40G.
In the event of a node failure, our systems may attempt to migrate your VM to a different node. A migration can mean a straight copy between two systems. A larger file to copy will result in longer down time than is necessary while your VE migrates.
Our Trader's Desktop plans are designed to deliver the most power AND performance. In this case, a smaller disk will render more performance. Most Trader's average 3G of disk space usage. 5G is usually perfect.
If you need to add more disk then it is still available to you at the rate of US$1/GB/month