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Mastering VMware® Infrastructure3Storage space for snapshots should also be considered, even if only for the temporary duration of the snapshot process (see Chapter 6). Luckily for SAN and VI3 administrators, the placement of a virtual machine's files is not a permanent decision. Moving a virtual machine to different storage locations is a simple but offline process.P When it comes to LUN design and management, VMware defines two common philosophies:P The adaptive scheme The predictive scheme Each scheme offers its own set of advantages and disadvantages to VI3 administrators. Undoubtedly, you will find that neither option is the appropriate solution in every situation. It is safe to say that most administrators will find themselves incorporating a blend of both philosophies as a means of compromise and earning the best of both worlds. Adaptive Scheme We'll start by introducing the adaptive scheme because of its simplicity. The adaptive scheme involves creating a small number of larger LUNs for the storage of virtual machines. The adaptive scheme results in fewer requirements on the part of the SAN administrator, less effort when performing LUN masking, fewer datastores to manage, and better opportunities for virtual disk resizing ...» |
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