Review: Veritas NetBackup PureDisk v6.5.1

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After installing PDOS, administrators will need to install NetBackup PureDisk, which comes on Linux standard TAR files. Although the included instructions are straightforward, experience with Linux is a definite plus when it comes to the initial setup and configuration. An installation requires at least two disks, a boot disk and a storage disk. The storage disk can be direct attached storage as in an internal drive, a disk array as in iSCSI and fibre channel, or a SAN.

Administrators will want to properly size their hardware, making sure that enough processing power and storage is available. Symantec offers detailed instructions on capacity planning in the documentation. Luckily, setting up the nodes is the most complex part of the product. The remaining chores are relatively straightforward and consist of deploying agents or backup clients, configuring storage options, running wizards and setting up various system parameters.

Installation of the client software was very simple, just a matter of running an installation program on the target machines. Administrators could also install the clients remotely using any deployment and management technologies that they may already have in-house.

While it is not rocket science, a good understanding of storage, networking and security is needed to successfully deploy the software. Once deployed, NetBackup PureDisk is managed via a concise browser-based tool that offers context-sensitive help. The management console can be a little intimidating, simply because of the number of menus, pull-downs and options.

For the most part, the management console offers a logical procession through the various choices. That said, it could be better organised and vastly improved with a tab-based interface that focuses on common functions. But potential purchasers should not be put off by those minor complaints, as Symantec intends to overhaul the interface in a future version of the product.

After testing a few backup scenarios it became easy to see where NetBackup PureDisk offers the most value. One of the more interesting aspects is how the product handles backing up virtual machines, which we tested with a couple of Microsoft Hyper-V virtual PCs.

Virtual machines are becoming very popular in datacentres and offer their own unique challenges. The technology used by Symantec's solution addresses many of those virtual machine challenges. For example, deduplication can reduce the size of the backup by a factor of 10 or more, by identifying which software elements of a virtual machine are the same as other virtual machines. Most virtual machines are created by duplicating a standard virtual machine, so many files across the virtual machines are the same. Removing those duplicate files from the backup saves significant space and time.

The deduplication process runs on the NetBackup media server, and the process was very fast in our tests and barely taxed the CPUs. We were able to run dedupe on 300GB of backup files data in under 15 minutes, using local Sata drives on the NetBackup media server we had built. Simply put, our test bed could handle significantly more data, and most, if any, performance issues will be dictated by the speed of the network backbone and the throughput of the storage disk.

The major strengths of NetBackup PureDisk come from its flexibility. It can be scaled relatively easily and deployed in a way that best suits the target environment. Scaling up usually means just adding more media servers, and incorporating failover has the same basic requirements.

That flexibility extends to the types of storage that can be used, as well as the hardware selected. Additional advantages of NetBackup PureDisk come from its disk-based nature of backup processing, which eliminates the complexity of tape media while significantly speeding up backups.

Of course, administrators can move backup files to tape for long-term storage or archival purposes if needed. The viability of disk-based backups is further enhanced by the product's deduplication abilities and data compression prowess, which can reduce storage needs by as much as a factor of 10.

While there are several other vendors in the backup and deduplication space, Symantec seems to be unique by offering a solution that incorporates several technologies that ultimately reduce the hardware, software and expenses associated with enterprise data backups.

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