As the space-saving blade servers, low power consumption, upgrade management and convenience features, once touted by the industry, but recently, applications rose once been poured cold water on the blade. According to Taiwan media reports, industry personnel disclosed blade servers vulnerable to I / O bottlenecks, and to reduce a lot of impact, it must be taken to external storage devices, integrated told computing software, and even load balancing switches need to strain, the same in trouble, you might as 1U servers.
Industry personnel that support of 10 blade servers, for example, if each piece of blade configuration 1GB card, Chassis export bandwidth should be 10GB, but the major blade server vendors Chassis provides maximum configuration of 6 GB, it is easy to create communication bottlenecks. In addition, the single blade is 2 way or more than 4-way framework, if the operation is too high, the need to form two or more blade grid, so that users must access between the blade worry, there are Shenzhen is the need for external storage devices, and all the blades can easily share the output of disk storage resources, I / O bottlenecks, so since it would be better with 10 units of 1U servers.
For this argument, there are objections that this happens, unless the system frequently read the storage device, while the probability of this happening is minimal. Of course, for this, some vendors have made the server response, for example, using methods designed to reduce the direct link I / O bottlenecks.