Running an OpenStack platform is a never ending story of debugging and searching for the best possible components, including the storage subsystem. It is very naive to think that OpenStack is just about a one-time installation and running of GUI or API interfaces.
One of the challenges we were facing was in replicating/triplicating storage across multiple datacenters with the lowest possible latency and highest throughput. At the beginning we were, as most other providers, running Ceph. Unfortunately that was a huge mistake which at the end of the day cost us a lot of wasted effort. However this article is not about Ceph storage…
In 2016 we entered a close cooperation with a company called Linbit, guys who invented a well-known storage technology called DRBD. DRBD has been an “old school”, part of the Linux world for many years. What it does is basically replicate block devices over the network. Version 9 supports up to 32 replicate copies of a single resource. But if you want to use it in a cloud environment, it’s necessary to do much more – to orchestrate on multiple levels.
Continue reading “So, what this BlackStor really is?”
At the beginning of 2016, our Operations team started investigating other storage options. We had a lot of requirements – a solution that is stable, reliable, fast, predictable, can scale horizontally and vertically, doesn’t kill all the resources, is manageable, integratable with our metrics and monitoring systems, extendable and transparent (so no black box dependency on a single vendor). That is the point where DRBD came into play as a possible underlying technology. Continue reading “BlackStor – The White Hat in Cloud Storage 2/2”
We’ve been overfed with projections about the long-term growth of IaaS, PaaS and SaaS markets, how enterprises are moving their infrastructures to the cloud and building cloud-ready applications. IDC, 451 Research, TBR and other providers of market intelligence and analysis constantly forecast double-digit growth of public and private clouds at the expense of traditional IT spending – and they’re right. From what we’ve seen in the last couple of years, companies of all sizes – from SMEs to global enterprises – are moving their technologies to various forms of cloud infrastructure and this trend is not going to stop any time soon. In fact, it is just a matter of time before the majority of applications will be sitting in the cloud.
Continue reading “BlackStor – The White Hat in Cloud Storage”