![]() ![]() End users are unaware they may be working with deduplicated data. End users are unaware of the deduplication process-Deduplication in Windows Server is entirely transparent.Afterward, the deduplication optimization process runs to ensure the deduplication of the data. When data is written to the storage, it is not optimized. This means that the deduplication process does not interfere with the performance of the write process. The deduplication process runs on data by using a post-processing model.Microsoft uses two principles to implement data deduplication in Windows Server: How does Windows Server data deduplication work? Prior to Windows Server 2019, ReFS deduplication was not possible. In Windows Server 2019, Data Deduplication can now deduplicate both NTFS and ReFS volumes. Microsoft keeps improving the features of deduplication as well. In this way, the storage environment does not house duplicated information. ![]() ![]() Instead of storing multiple copies of data, as in traditional storage environments, deduplication provides the means to store the data once and create intelligent pointers to the actual data location. This leads to redundant copies of data that impact the efficiency of storage. In a large file share, end users may store many copies of the same or similar files. A departmental file server is a good example that helps visualize how there may be vast amounts of duplicated data. It is especially true if the different files stored on a Windows Server volume are similar in content or structure. When you store data comprising various files and other data on any Windows Server, there will be duplicated data blocks among the multiple files. The reason deduplication ratios from different vendors cannot be compared directly with one another is that inputs, methods, and reporting are all different from product to product.Ĭomparing the deduplication ratios of different backup vendors is an incredibly invalid way of comparing a product’s ability to deduplicate data.What is data deduplication in Windows Server? ![]() This fact has been true since the very beginning of deduplication, but it is now more true than ever. In this blog, we’ll take a deeper look into why that is, and describe the proper way to compare vendors’ deduplication capabilities. The concept of deduplication ratios was born in the early days of target deduplication. You purchased a product like a Data Domain appliance and sent hundreds of terabytes of backups to an NFS mount, after which the appliance would deduplicate the data. You compared the volume of data sent by the backup product to the amount of disk used on the appliance, and that ratio was used to justify this new type of product.Įven in those early days, however, you couldn’t compare the advertised deduplication ratio of different products, because you had no idea how they created that number. The biggest reason for this was that you had no idea what type of backups each vendor sent to their appliance, or the change rates that they introduced after each backup - if any. If they wanted to make their deduplication ratio look better, they would simply perform a full backup every time with no change rate. Perform 100 full backups with no change and you have a 100:1 dedupe ratio!Įven if a vendor attempts to mimic a real production environment - with a mix of structured and unstructured data, and a reasonable amount of change - it will not match the ratios and change rate of your environment. You have a different mixture of structured and unstructured data and a different change rate. ![]()
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