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Home > Data Storage News > EMC adds file-level single instancing, Flash to Celerra |
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Integrated primary deduplication for files The Celera NS-120, NS-480 and NS-960 will replace the previous NS series models, and the new systems include built-in single instancing through code port from EMC Avamar and RecoverPoint. EMC's director of IP storage marketing Brad Bunce said a hashing operation was pulled in from Avamar and a file system crawler that identifies inactive files was ported from Kashya to provide automatic file-level single instancing and policy-based compression on inactive files. "It's not a bolt-on appliance or running in a separate memory space," Bunce said. "It's integrated in the Celerra base code." Given the code port, it's not clear why Avamar's sub-file level deduplication algorithms couldn't be pulled across as well. Bunce said there are plans on the roadmap for block-level dedupe in Celerra (EMC CEO Joe Tucci has pledged to add dedupe to all of the company's storage systems). EMC's principal rival in multiprotocol storage, NetApp, offers sub-file level deduplication on primary storage volumes, but "there's more efficiency in file-level single instancing for general purpose systems," Bunce said. One analyst pointed out that there's a tradeoff to be made between data reduction ratios and system performance. "In the future, both options could be beneficial for customers," said Steven Scully, research manager, disk storage systems, for IDC. Ready for Site Recovery Manager The new NS series arrays are also ready for integration with a new feature coming soon for VMware Inc.'s Site Recovery Manager (SRM). The new SRM will offer automated failback as well as failover for disaster recovery and business continuity purposes, a feature SRM users have been waiting for. Bunce says Celerra's replication has already been certified to work with the automated failback process by letting VMware's vCenter execute replication operations through the array. VMware isn't launching the new feature for SRM at VMworld Europe this week as EMC executives expected, but it is on the way. With the new Celerras, EMC is also joining competitors including IBM and 3PAR in offering native single-instancing of VMware Desktop Infrastructure (VDI) virtual workstation images through integration with Celerra's space-efficient snapshots. EMC is also adding software features for compliance and system management to Celerra. Customers can set policies at the file system level that will govern how long individual files are to be retained on the system, and a new non-spoofable clock will prevent deletion or modification of files until their retention period ends. A provisioning wizard has also been added to automatically configure capacity added to the system after initial setup. Previously, Celerra offered automatic provisioning only during initial installation. Bigger drives, more cache, Flash support Hardware-wise, the new systems are based on the bigger, beefier Clariion CX4 models announced last year. The NS-120 scales to 120 drives and supports up to two NAS interface blades. The NS-480 scales up to 480 drives and four blades, and the NS-960, 960 drives and up to eight blades. The system will also be available as a diskless gateway, the NS-8, which supports up to eight blades and can be used to front Symmetrix as well as Clariion arrays. Like the Clariion CX4, and DMX before it, the new NS series will support 73 GB and 146 GB Flash drives. Flash drives will begin shipping for the new NS arrays when they become available this week, according to Bunce. Entry-level list pricing for an NS-120 with six 300 GB 15,000 RPM FC drives, snapshot software, CIFS licenses and a single blade is $37,725.
As with the CX4, overlap among EMC's storage hardware products with this release has become more pronounced. Like the CX4, the new NS capacity points overlap with the low end of the Symmetrix line, and the underlying Clariion hardware has also been given high-end features in recent years such as active-active controllers, quality of service controls and persistent write cache. EMC also launched its Atmos clustered system for file data last year, and that system could be seen as competitive with NAS. Celerra's compliance features also move it onto the home turf of EMC's Centera CAS box, although Bunce said the Celerra compliance features are meant for a low-end, files-only environment, while Centera offers more advanced application integration and support for block data. EMC's Tucci said on an earnings call last year that he expects multiprotocol or unified storage systems to dominate the market, especially given the global economy. EMC has also already previewed a planned converged backup, replication and archiving box as a platform for EMC's various data protection software titles. Could something similar be happening to primary storage as well? David Hill, founder and principal analyst for Mesabi Group, said there will probably always be a need for specialization, at least in some markets. "Multiprotocol storage is doing very well, especially for midsized environments," Hill said. "But large organizations that have been Fibre Channel-based aren't going to change, at least for the next few years." Stay tuned, said Bunce. "You can see more evidence of convergence here, which brings great efficiency to our operations and the offering," he said. That's not coincidence, he said, though going forward, "you'll still see finely differentiated products from EMC."
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