There are a couple of inherent challenges with the default OpenStack’s snapshot capability out of the box including:
1. Snapshotting a VM requires the VM to be paused temporarily. Depending on how large a VM is, the pause could be anywhere from a few seconds to several minutes – which is unacceptable for a mission critical server.
2. OpenStack’s standard configuration is that the compute node hosting the VM being snapshotted also performs the snapshot operation. This can create what is called the “noisy neighbour effect,” where the process of snapshotting a VM can have a negative performance impact on another tenant’s VM.
With this new technology we’ve developed, the compute resources are isolated and allocated to tenant VMs from the compute resources that serve VM snapshots, increasing the speed of snapshots and decreasing the pause time of a VM by an average of 74%, as well as preventing the noisy neighbour effect.
This new product is now live on Cloud-A and available at no additional cost.