![]() ![]() The third section stores all the variable values you can play with in the model. The model was designed for the typical LTO use case where data is written to tape, typically daily, based on the backup plan. It will give you an answer, but the LTO costs will be overstated by anywhere from 10%-50%. The model is not designed to compare the cost of a one-time archive. ![]() You may be tempted to enter zeros in both the Yearly Added Data and Daily Incremental Backup fields to compare the cost of a one-time archive. If you have bigger (or smaller) pipes, adjust accordingly.ĭon’t use the model for one-time archives. As the comment notes, that’s about as much traffic you can cram through a 1Gb/s upload connection in a 24-hour period. One question you may have is why we limited the Daily Incremental Backup value to 10TB. You also can see the limits we imposed on the data elements. The second section is for organization and documentation of the data that is entered. The website implementation is obviously much prettier, but the variables and math are the same as the spreadsheet. In the first section, you enter the four values the model needs to calculate the LTO and B2 cloud storage costs. The spreadsheet is divided into multiple sections. (Do it to get the deep technical results of this report. The Excel file we’ve provided for download below is completely self-contained there are no macros and no external data sources.ĭownload Excel file: Backblaze-LTO-Calculator-Public-Nov2018.xlsx B2 calculator that is on our website was based on a Microsoft Excel spreadsheet we built. In fact, we’re making the underlying model available for download. Rather than just saying, “ trust us, it’s cheaper,” we thought it would be a good idea to show you what’s inside the model: the assumptions we used, the variables we defined, and the actual math we used to compute our answers. B2 Cloud Storage calculator, a tool to determine whether or not it makes economic sense to consider using cloud storage over your LTO storage. In that post we presented our version of an LTO vs. LTO Versus Cloud Storage Costs – the Math RevealedĪ few months back we did a blog post titled, LTO versus Cloud Storage: Choosing the Model That Fits Your Business. This article was written on Decemby Andy Klein, director of product marketing, Backblaze, Inc. He has shared his expertise in computer security and backup at the Federal Trade Commission, Rootstech, RSA and over 100 other events. ![]()
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