You can select the data processing mode for VMs and VM disks in jobs (parallel or sequential) and specify task throttling options.
Mind the following:
- The Enable storage latency control option is available in Veeam Backup Free Edition Enterprise and Enterprise Plus Editions.
- The Set custom thresholds on individual datastores option is available in Veeam Backup Free Edition Enterprise Plus Edition only.
To specify data processing settings:
- From the main menu, select General Options.
- Click the I/O Control tab.
- By default, Veeam Backup Free Edition uses the parallel data processing mode for VMs and VM disks. To disable parallel processing, clear the Enable parallel processing check box. In this case, Veeam Backup Free Edition will process VMs and VM disks sequentially, one by one.
- To control the I/O load on the production storage, select the Enable storage latency control check box. When you enable storage latency control, Veeam Backup Free Edition monitors storage read latency on production during data protection and disaster recovery activities. To monitor the storage latency, Veeam Backup Free Edition uses real-time metrics from the hypervisor.
Specify two thresholds:
- In the Stop assigning new tasks to datastore at field, specify the I/O latency limit at which Veeam Backup Free Edition must not assign new tasks targeted at the .
- In the Throttle I/O of existing tasks at field, specify the I/O latency limit at which Veeam Backup Free Edition must decrease the speed of data retrieval or writing to/from the . When the I/O latency for this reaches this value, the Veeam Data Mover working with this will slow down data retrieval or writing.
The value in the Stop assigning new tasks to datastore at field cannot be greater than the value in the Throttle I/O of existing tasks at field.
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If you enable the storage control latency option, Veeam Backup Free Edition starts processing VM disks residing on the same datastore with a 40-60 second time offset. This offset helps Veeam Backup Free Edition evaluate the current I/O load on the datastore. For example, if you launch a job processing a VM with two disks, Veeam Backup Free Edition will start processing the first VM disk, wait for 40-60 seconds to evaluate the I/O workload on the datastore, and then start processing the second VM disk. Keep in mind this behavior. If you schedule jobs that process multiple VM disks residing on the same datastore to start at the same time, the jobs performance will degrade. |
You can set the I/O latency limit for every storage in the virtual infrastructure separately.
To set the I/O latency limit for every storage separately:
- From the main menu, select General Options.
- Click the I/O Control tab.
- Click Configure.
- Click , select the necessary and click OK to add it to the storage list.
- Select the added in the list and click Edit.
- Specify the I/O thresholds for the as described above.
