Engineers have to read the source code. Some more often, some less often, but in the end everyone has to. It is not enough to know the syntax of the language, one must be able to quickly find the codepath of interest and understand the paths of program execution...

Once an administrator finds out about steal time, he can really blame his cloud provider for stealing the CPU time of his virtual machine! In numerous articles on the subject, it is written that this metric reflects the percentage of time that the virtual machine is missing from the hypervisor, but what does it all mean?..

Hardware errors become frequent when the infrastructure has hundreds of servers. Everything is less or more understandable with disks: it dies, lags or increments S.M.A.R.T. counters. Memory errors are of more interest...

Performance benchmarking is a huge and complex topic and we face different aspects of it from time to time. One relatively simple and probably common question is how to compare disks in the cloud?..