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June 9, 2011
As Florian Haas has pointed out in my previous post’s comment, our shared storage configuration requires special precautions to avoid corruption of data when two hosts connected via DRBD try to manage LVM volumes simultaneously. Generally, these precautions concern locking LVM metadata operations while running DRBD in ‘dual-primary’ mode. Let’s examine it in detail. The [...]
June 6, 2011
Today, I want to take a look at some possible issues that may be encountered while using OpenStack. The purpose of this topic is to share our experience dealing with the hardware or software failures which definitely would be faced by anyone who attempts to run OpenStack in production.