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Express Updates - SCCM server side payload
I've been taking a closed look at Express Updates and how these are handled on the server side. Great to see how SCCM will prepare both the full and the express update package, but some of the over h...
Express updates can definitely be large, which is why we recommend having a lot of free disk space on the servers before enabling them.
The reason that these are large: They contain "deltas" for every patched file in the update, for every existing version of the file that has been released. Imagine NTOSKRNL.EXE. It might be patched each month. So after 12 months, the express update would contain 12 different deltas for that one file. Multiply that for all the different files that have been patched, especially all of those that have been patched multiple times, and that's the reason for the large size.
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