Maximum volume size on DRBD

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From time to time we get asked things like this:

I want to use a 100TiB volume with DRBD, is that supported”?

The biggest public device size with DRBD® known to LINBIT® is currently ~600TiB. (JUNE 2019 UPDATE)

The current maximum device size is 1PiB (1 PetiByte = 1024 TibiByte[1. Yes, I like “Tera”, “Peta” and “Exa” more, too.]), so there’s a bit of room left.

DRBD needs about 32MiB RAM per TiB storage; so for 1PiB storage you are at 32GiB just for the DRBD bitmap[1. at least with current code, we’ll have to change that for really big devices]. Having a bit more for the OS, userspace and buffer cache is left as an exercise for the reader.

If you’ve got questions, ask the DRBD experts at LINBIT – we wrote the code, after all!

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Yusuf Yıldız

Yusuf Yıldız

After nearly 15 years of system and storage management, Yusuf started to work as a solution architect at Linbit. Yusuf's main focus is on customer success and contributing to product development and testing. As part of the solution architects team, he is one of the backbone and supporter of the sales team.

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LINBIT is committed to protecting and respecting your privacy, and we’ll only use your personal information to administer your account and to provide the products and services you requested from us. From time to time, we would like to contact you about our products and services, as well as other content that may be of interest to you. If you consent to us contacting you for this purpose, please tick above to say how you would like us to contact you.

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