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Comparing Filesystem Performance in Virtual Machines

In the previous post I’ve linked to, How not to benchmark Cassandra, Jonathan Ellis writes on the subject of testing on virtual machines:

This one is actually defensible: if you deploy on VMs, then benchmarking on VMs is the most relevant scenario for you. So as long as you understand the performance hit you’re taking, this can be a reasonable choice. However, care must be taken: noisy neighbors can skew results, especially when using smaller instance sizes. Even with larger instances, it’s much more difficult than you think to get consistent results.

This reminded me of a blog post, I’ve read earlier this year, authored by Mitchell Hashimoto in which he compares the performance of filesystems in VirtualBox and VMware with different settings:

For years, the primary bottleneck for virtual machine based development environments with Vagrant has been filesystem performance. CPU differences are minimal and barely noticeable, and RAM only becomes an issue when many virtual machines are active. I spent the better part of yesterday benchmarking and analyzing common filesystem mechanisms, and now share those results here with you.

Original title and link: Comparing Filesystem Performance in Virtual Machines (NoSQL database©myNoSQL)

via: http://mitchellh.com/comparing-filesystem-performance-in-virtual-machines