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Vol. 5 No. 7 September 2006

BlackBerry strains Exchange storage

Users complain that their BlackBerries are a ball and chain, but they're no picnic for storage admins either: Continuous calls made by the devices to Exchange can cause enough "I/O thrash" to bring "an Exchange server to a grinding halt," says Steve Lewis, co-founder and CEO at Teneros, which makes the Application Continuity Appliance (ACA) for Microsoft Exchange, a high-availability product. Teneros discovered this problem when it installed an ACA rated for 250 Exchange users at a customer site with 65 employees--all of them BlackBerry users. Because one BlackBerry user is equal to approximately 4.5 standard Exchange users, the ACA was "struggling," says Lewis. Similar performance problems happen when users have very large Exchange databases. Teneros engineers fixed the problem by adding more disk spindles to the ACA. "With BlackBerry users, we've found that customers have to double-down on their SAN," says Lewis. --Alex Barrett

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Features in this issue

  • Tricky backup for SharePoint

  • CDP: Look before you leap

    Some pundits have postulated that continuous data protection (CDP) will replace backup. But is that just new technology hyperbole or is CDP a must-have technology?

  • Backup-to-disk performance tuning

    Disk-based backup can lower costs, reduce complexity and add scalability. But to achieve top performance, you'll need to do lots of benchmarking and watch for poorly configured production storage.

Columns in this issue

  • Backup best practices are always evolving

    Some new advances in backup, such as virtual tape libraries, represent evolutionary enhancements to the traditional backup process, while others like continuous data protection and single-instance storage are potentially far more transformational.

  • 10 points to consider before deploying an e-mail archive

    Selecting an e-mail archiving application based solely on features and functions may result in unexpected administration costs. Consider these 10 points before deploying an e-mail archiver.

  • Some small tech upstarts might play big roles

    Storage Bin: The big storage vendors are always trying to steal a piece of each other's pie. But some small tech upstarts might play big parts in determining who comes out on top.

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