Exam CV0-003 topic 1 question 238 discussion

Any time you see a question that has one of the answers as "Deduplication", choose Deduplicatoion.

new storage is not efficient, but deduplication is.

The MOST efficient way to mitigate the situation when storage is 80% full on the volume that stores VDI desktops is to implement deduplication. Deduplication identifies identical blocks of data and stores only one copy, which can reduce the amount of storage space required. Compression can also reduce storage space but can be resource-intensive and may not be the most efficient solution in this case. Replication and storage migration do not address the issue of storage space, but rather move data between storage systems or locations.

deduplications it is.

https://techcommunity.microsoft.com/t5/storage-at-microsoft/deploying-data-deduplication-for-vdi-storage-in-windows-server/ba-p/424777 Why do I want to use Data Deduplication with VDI? To start with: You will save space! Deduplication rates for VDI deployments can range as high as 95% savings. Of course that number will vary depending on the amount of user data, etc and it will also change over the course of any one day. Data Deduplication optimizes files as a post processing operation. That means, as data is added over the course of a day, it will not be optimized immediately and take up extra space on disk. Instead, the new data will be processed by a background deduplication job. As a result, the optimization ratio of a VDI deployment will fluctuate a bit over the course of a day, depending on home much new data is added. By the time next optimization is done, savings will be high again. Saving space is great on its own, but it has an interesting side effect. Volumes that were always too small, but had other advantages are suddenly viable.

Why would storage migration be the most efficient? Wouldn't the most efficient be de-duplication or expanding/upgrading the storage being provided by the provider?