Configuring Disk I/O BandwidthIn Parallels Cloud Server, you can configure the bandwidth virtual machines and Containers are allowed to use for their disk input and output (I/O) operations. Limiting the disk I/O bandwidth can help you prevent the situations when high disk activities in one virtual machine or Container (generated, for example, by transferring huge amounts of data to/from the virtual machine or Container) can slow down the performance of other virtual machines and Containers on the Parallels server.
By default, the I/O bandwidth limit for all newly created virtual machines and Containers is set to 0, which means that no limits are applied to any virtual machines and Containers. To limit the disk I/O bandwidth for a virtual machine or Container, you can use the
# prlctl set MyVM --iolimit 10 Set up iolimit: 10485760 The VM has been successfully configured. To set the limit for a Container, just specify its ID instead of the virtual machine name, for example: # prlctl set 101 --iolimit 10 Set up iolimit: 10485760 Saved parameters for Container 101 By default, the limit is set in megabytes per second. However, you can use the following suffixes to use other measurement units:
Note: In the current version of Parallels Cloud Server, the maximum I/O bandwidth limit you can set for a virtual machine or Container is 2 GB per second.
To check that the I/O speed limit has been successfully applied to the
# prlctl list MyVM -o iolimit 110485760 # prlctl list 101 -o iolimit IOLIMIT 10485760
At any time, you can remove the I/O bandwidth limit set for the
# prlctl set MyVM --iolimit 0 Set up iolimit: 0 The VM has been successfully configured. # prlctl set 101 --iolimit 0 Set up iolimit: 0 Saved parameters for Container 101 |
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