Comparing NVMe drives with normal SSDs or even SAS/SATA HDDs is like comparing apples with pears in terms of performance. However, it’s not always feasible to run everything on all-flash storage, as it’s still quite costly. Thats were bcache steps… Read moreSpeedup block devices with bcache

I’m recently dealing a lot with performance adjust- and measurements for flowShield v3. Interestingly, I’ve figured out, that KVM adds some serious latency to memory operations, which is problematic, as it means increased latency and at some point packetloss once… Read moreKVM Memory Latency

Recently, at combahton, we had to migrate several older GlusterFS Nodes to new nodes, as they were not able to keep up with our current performance requirements. We had basically two options: Physically move the drives node-by-node into the new… Read moreGlusterFS – Replacing nodes online