Highly Reliable Systems: Removable Disk Backup & Recovery

Cloud Backup Calculator: Why Local Data Matters

By Kelley Kirtley

The Internet is filled with Clouds, so shouldn’t your data be indoors?Replication3.2

Not that long ago Derry Bryson, the senior software engineer at Highly Reliable Systems, offered users access to his Incremental Backup Calculator. It became an indispensable tool for estimating the size of data that changes for each days’ backup, which ideally would be stored to an attached backup appliance and then replicated up to the Cloud. Unfortunately, far too many people take a shortcut and store directly to the Cloud, not realizing just how long it will take them to upload that data, risking a failed backup routine that could prevent disaster recovery.

The High-Rely Cloud Backup Calculator estimates your backup data upload time to the Cloud, assuming your connection to the Internet will be the primary bottleneck. To use the Cloud Backup Calculator, input the size of data to be uploaded then choose the bandwidth of your connection in the upstream direction (note that your connection may be asymmetrical). Theoretically, all locally stored backup data will be saved and retrieved much faster than files sent to the Cloud.

Upload Time Calculator @ =


A Better BDR: Back-up to 18TB RAIDPacsThis tool will deliver your upload time estimate, which should then be compared to local storage using the Incremental Backup Calculator. Backing-up to a local seed disk can be up to 1000x faster than the Cloud – and local restore is about 300x faster. If you’re in the business of servicing clients, this becomes an important statistics to remember for when a server goes down.

Example: How long do you guess it would take to upload 100-Gigabytes of data if your customer had a fairly typical 3Mbps download/768Kbps upload DSL connection speed? According to the calculator the FASTEST you could ever experience would be over 15 days! In reality you should assume 50-70% of this number (that means at least a 30%-50% reduction) for real world connection overhead. Often times administrators will set up bandwidth throttling to upload at night or to restrict connectivity so that users can get access during the day, so your actual upload may take longer.

These are all smart reasons for why you should store your backup data locally, and save the Cloud strategy for a rainy day. See how High-Rely can solve your problems here.

Kelley Kirtley

About Kelley Kirtley

Kelley is a Senior Account Executive with the High-Rely sales team. View all posts by Kelley Kirtley →

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