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Backup and restore is a game of capacity or volume. You have to protect not only your 5TB back-office Oracle database but the army of multihundred-gigabyte Windows servers scattered throughout the enterprise. High-capacity backup tends to have the most sex appeal, but because every enterprise has dozens to hundreds of Windows servers, backing up this data is just as important--and much more operationally cumbersome.
The critical nature of Windows backup is reflected in the way the industry has matured. In the early 1990s, Microsoft LAN Manager was considered a second-tier, departmental file-and-print server that competed with NetWare. At that time, backup of Microsoft (and Novell) servers was done by small, focused companies like Cheyenne and Palindrome. With the introduction and subsequent success of Windows NT, Windows server backup became too significant for storage management leaders to ignore. As a result, Computer Associates (CA) grabbed its Long Island neighbor Cheyenne (the product is now known as ARCserve), while Palindrome was gobbled up by Seagate and then subsequently sold to Veritas (the product is now known as Backup Exec).
Because of these acquisitions, CA and Veritas (now part of Symantec) dominate the Microsoft server market, but a new vendor is about to enter the game in a big way. In September 2004, Microsoft announced it would throw its hat into the data protection ring with a disk-to-disk backup product called Data Protection Server (a.k.a.
So what exactly is this new Windows-based storage product? In its initial form, DPM provides disk-based backup of Windows file servers. Here's a simple description of how it works. DPM agents are pushed to individual servers as part of an Active Directory policy. Once installed, these agents become part of the DPM server domain, which means storage managers can apply backup policies to individual systems or server groups. The server-based DPM agents monitor and log any changes to files on the protected servers, and then replicate any byte-level changes asynchronously to the Data Protection Server at regularly scheduled intervals (e.g., hourly or daily). Once files are backed up to the DPM server, users can take advantage of Microsoft's Volume Shadow Copy Service (VSS) functionality to create point-in-time copies of the DPM repository. In this way, DPM enhances data protection by capturing data changes more frequently than typical nightly backups and maintaining an online, disk-based file image for easier restores.
So Microsoft is once again jumping into an established marketplace with its unique "special sauce." But what are its chances?
ESG sought the answer to this question with a research survey of 232 storage and IT professionals. Respondents worked at organizations ranging in size from fewer than 100 employees to more than 20,000, and came from eight defined industry segments. (In addition to the eight segments, 9% of respondents said they worked in "Other" industries.) When respondents were asked, "Do you believe your organization would use a disk-based data protection suite from Microsoft?," nearly half said they would.
Why would these users embrace a Windows-based storage management solution? There are several reasons:
- Microsoft's offering fits the growing disk-to-disk backup trend. In ESG's April 2005 research report, Tape Replacement Realities, 18% of those surveyed said they've replaced--not augmented--tape libraries with near-line disk arrays, while another 58% would consider doing so. Why? Tape is too slow, prone to media errors and doesn't meet current needs for frequent incremental backups and online restores. In this climate of active tape replacement, Microsoft's DPM product hits the market at a perfect time.
- DPM complements other Windows-based tools. As Windows servers proliferate, many shops have embraced other Microsoft support tools like Active Directory, Microsoft Operations Manager and Systems Management Server. Bill Gates and company have also tightened the integration between these tools through successive releases. DPM will be tightly integrated with Active Directory out of the gate in terms of agent distribution, identity and policy administration, and it'll certainly talk to other Windows tools in the future. Companies that have invested in these tools see DPM as a way to improve backup/ restore and leverage their existing management infrastructure to lower training and operating costs.
- It's cheap and easy to use. DPM clients will be priced at $100 each, while servers cost $650. As my colleague Steve Duplessie says, "At that price, DPM is as good as free." What's more, nearly 100% of the Windows shops surveyed by ESG have a network directory infrastructure based upon Microsoft Active Directory. Installing the DPM server and deploying the clients will be a walk in the park.
This was first published in September 2005