您好，我们的VM带有文件SERBER，可以安装在Nutanix的一个节点上。目前，磁盘的大小为3.5 TB，但我们希望将此尺寸扩展到4.5TB。是否有人知道VM是否可以与如此大的磁盘相处正确？
最好的答案谢尔盖·伊万诺夫（Sergei Ivanov）
If the hypervisor is AHV, the virtual disk size is almost limitless. The theoretical maximum would be 9 exabytes. So, if the guest operating system supports the desired size, it is good to go.<\/p>
However, i would recommend not to create large disks for performance reasons. In Nutanix we have write cache, which is called oplog and the oplog is always 6Gb in size. It is assigned per vdisk and it means that every vdisk has 6Gb of oplog no matter what size the vdisk is. If you get a very big vdisk and you do write operations towards it very actively, it might be performing slower, because the oplog would get full very quickly. The trick is to create multiple vdisks and present them to the guest OS. If the application cannot work with multiple disks and requires only 1 disk, you can use striped volumes to create a single guest disk made of multiple Nutanix vdisks. For example, if you need 4.5Tb, you can create 5x900Gb disks to get the same size, but that way you will get 5 times write cache compare to asingle large vdisk and the performance will be better. However, if performance is not very important, you can go with 1 large vdisk.<\/p>","className":"post__content__best_answer"}">
