PHD Virtual Backup for VMware vSphere
PHD Virtual Backup's CloudHook technology provides multiple options for storing your backed up data in the cloud, including some of the most popular cloud storage providers like Amazon S3, Google Cloud Storage, RackSpace CloudFiles, and OpenStack.
In addition to writing backups to the cloud directly you can also use CloudHook to store archived copies of your backups on cloud storage by enabling Backup Archive. For details, see Configuring Backup Archive.
Note: Using a cloud backup storage option requires version 6.2 or later and a CloudHook license. To obtain a CloudHook license, contact PHD Virtual (a CloudHook license is not required when running the trial version of the product).
PHD Virtual Backup enables cloud storage backups by first caching data locally on an attached virtual disk known as the Write Space.
In some situations, cloud backups can provide an alternative to tape, allowing for long term, offsite storage in addition to regular backups to local or network storage. Some considerations should be made when deciding how cloud backups can best suit your needs, for instance, backing up to the cloud is highly dependant on the network speed and bandwidth available and in some cases may take additional time to complete when compared to backing up to other storage locations.
The following steps describe how to enable and configure cloud backup storage with PHD Virtual Backup. These instructions assume you have already deployed and initially configured a PHD Virtual Backup Appliance.
Step 1: Apply the CloudHook license update
Step 2: Configure Write Space
Use the hypervisor client to attach a new virtual disk to the PHD VBA virtual machine by editing the virtual machine settings. This disk will be used as the Write Space disk to cache data being sent to cloud backup storage.
A guideline for selecting the correct size Write Space disk is to calculate at least 50% of your daily changed data, then attach a disk that can accommodate that size. Typically, changed data is about 5% of the total of all virtual disks in your environment that are being backed up. So for example, if you were backing up ten VMs every day that totaled 1 TB, you should attach a virtual disk that is at least 25 GB (Changed data is approximately 5% of 1 TB, which is 50 GB; of which 50% is 25 GB). Write Space can be expanded at any time by adding additional attached virtual disks.
Step 3: Configure Cloud Backup Storage
Go to the Backup Storage tab and select the Cloud storage you will be using from the list of available options.
Creating sub-folders can be useful when writing to the same bucket or container with multiple PHD VBAs (if using Rackspace, you can use different File Prefixes to handle multiple PHD VBAs writing to the same bucket).
Finally, the Encryption Passphrase is a string you provide to secure your encrypted cloud backup data. In the case you need to attach a new PHD VBA to your cloud backup data store, you will need to include this passphrase along with the path and credentials to successfully mount the data store. Once set, the passphrase cannot be changed.
When determining if cloud storage is right for you, one main consideration should be the estimated backup window. Backing up to the cloud will be slower in most cases when compared to other backup storage types, so determining the length of time an average backup will take is crucial.
You can estimate this time by first determining the average changed data in a typical backup then dividing that by your transfer rate. If you are already running backups, the job logs will contain the number of bytes transferred. Transfer rates can be estimated using online speed test tools in most cases or you can check with your ISP. The result of this calculation should give you an estimate of the time required to backup to the cloud.
Note that the initial backup will take much longer when compared to subsequent backups that include changes only. For example, transferring 250 GB of actual used data with an upload speed of 30 Mbps would take about 9 hours to complete the first backup. Each backup thereafter would take a fraction of the time, a few minutes to an hour, as only changes from the initial backup are included.
Cloud Storage Notes
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