IO Limits

“Disk read default limits” is the default set of read limits assigned to virtual servers.
“Disk write default limits” is the default set of write limits assigned to virtual servers.

IO limits for VM’s are enforced using the native iotune facility of Libvirt.

Other IO limits for copying images etc. are enforced through Linux Control Groups (cgroups) – specifically the file /etc/stabile/cgconfig.conf . These are configured manually in /etc/stabile/config.cfg.

Unforunately cgroup I/O throttling of block devices (blkio) does not currently work with Linux ZFS. We recommend using ZFS with Stabile, but this unfortunately makes it imposible to throttle other disk operations than VM read/write operations.