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Open Source Storage Save Money with Open Source Storage Save Money with Open Source Storage Save Money with Open Source Storage ® 1 an Save Money with Open SourceStorage Storage, an Internet.comeBook Storage eBook. © 2009, Internet.com Contents… Save Money with Open Source Storage This content was adapted from Internet.com’s Enterprise Storage Forum and Enterprise Networking Planet Web sites. Contributors: Drew Robb, Deann Corum, and Jennifer Schiff. 2 2 The State of Open Source Storage 5 Saving Big Money With Open Source Storage 5 7 7 Get Your Free Networked Storage 9 An Open Source Backup Option 9 11 11 Configure Bacula for Open Source Backups 1 Save Money with Open Source Storage, an Internet.com Storage eBook. © 2009, Internet.com Save Money with Open Source Storage The State of Open Source Storage By Drew Robb pen source storage has come a long way in the “I still wouldn’t say that there were a lot of open source stor- last few years. There are good open source offer- age apps,” said Jason Williams, CTO at Digitar of Boise, ings on the backup, mirroring, file system, NAS, Idaho, a company that makes heavy use of Linux and Sun and storage virtualization side. It is possible to open source software. Ocobble together an awful lot of disks and run them at high performance without the need for state-of-the-art hardware. Williams said the leading open source storage offerings are Even companies known for proprietary offerings, like EMC, Sun’s ZFS file system, Zmanda and Bacula for backup, and are on board. DRBD for network-based disk mir- roring. “EMC most often encounters open source in the form of a Linux-based Greg Schulz, senior analyst and host connected to our storage founder of StorageIO Group, is products,” said Jay Krone, senior more upbeat about the state of director of storage platforms at open source storage offerings. EMC. “Customers are purchasing Intel- or AMD-based servers and “There is a wide variety of open putting Linux on them to take best source storage solutions and ap- advantage of volume pricing on the plications from different sources, hardware and minimal-to-no licens- ranging from volume manag- ing costs on the software.” ers, iSCSI and NAS stacks, file systems, clustered file systems, Krone said customers tend to add object-based storage solutions, open source applications, like the dedupe and compression, among Apache Web server, or proprietary others, not to mention all of the products like Oracle databases, to those Linux-based serv- propriety or commercial solutions that may leverage open ers to address a wide spectrum of business problems. To source technology embedded into turnkey solutions and meet this trend, most EMC storage hardware and software products,” said Schulz. “Of traditional server and storage products have been adapted to run in a Linux environment. vendors, Sun is probably the most notable and vocal around For example, EMC’s PowerPath family is available in Linux. open source storage, along with many smaller startup ven- dors.” Despite the recognition by EMC and other data storage vendors, opinions differ on how far open source storage has Sun’s “Amber Road” project, now known as Unified Stor- come. age Systems (UFS) or the Sun Storage 7000 series, is built around preinstalled OpenSolaris and ZFS on x86 hardware. Of traditional server and storage vendors, Sun is probably the most notable and vocal around open source storage, “ along with many smaller startup vendors. ” 2 Save Money with Open Source Storage, an Internet.com Storage eBook. © 2009, Internet.com Save Money with Open Source Storage These units support both file and block data protocols, thin Open Source Storage Projects provisioning, replication, mirroring, snapshots, antivirus, and analytics. An HPC version adds Linux to the mix too. None of the big data storage vendors are as committed to open source as Sun, so it is no wonder the rest of the field “Amber Road is essentially a NAS system that integrates is rather dispersed among a wide range of players. In the inexpensive servers with open source software in an easy- backup arena, you have outfits like Zmanda Inc. of Sunny- to-use appliance,” said David Trachy, a principal engineer at vale, Calif., and Bacula Systems SA of Switzerland. Sun. “The whole point is to get around the premium you have to pay for proprietary disk systems.” Amanda, the basis for Zmanda’s backup offering, is billed as the most popular open source backup and recovery Sun’s Open Storage portfolio also includes its ZFS file sys- software in the world, with more than half a million servers tem, storage servers, and its Storage J4000 family of JBOD and desktops running various versions of Linux, UNIX, BSD, systems. Trachy said Sun is seeing plenty of growth among Mac OS-X, and Windows worldwide. Zmanda also has the these products. Zmanda Recovery Manager (ZRM) for MySQL. ZFS, in particular, is garner- While Zmanda uses a business ing good reviews. Offered free model similar to Red Hat, Bac- with OpenSolaris, it provides ula is the real deal in terms of a high level of data integrity, Amber“ Road is frontier open source — run by a as well as mirroring between team of devotees such as Kern sites. According to Trachy, it can essentially a NAS system Sibbald, who are now starting be used as the basis for huge to offer professional services data repositories. It is already that integrates inexpensive to Bacula fans. Bacula man- being picked up by partners like servers with open source ages backup and recovery to greenBytes and Nexenta Sys- and from tape or disk. What is tems to build storage systems. software in an easy-to-use endearing about these guys is the smart marketing — a Dracula “Startups are using ZFS and appliance theme with a catch phrase that combining it with JBODs to will appeal to backup veterans create different products and (“It comes by night and sucks appliances,” said Trachy. “Miss- the vital essence from your ing in Sun’s open source lineup is computers”) — and blunt honesty. The news page features FC [Fibre Channel] block-level storage and pNFS, but these ”the startling admission, “We recently found and corrected a will be added over time.” serious bug in Bacula...” Oh, for such openness whenever a big IT vendor makes a snafu. In addition, Trachy notes that ZFS integrates well with solid state drives (SSDs), which are beginning to gain traction Cleversafe is another storage vendor pursuing an open in the storage world. Williams, for example, swapped SATA source-based business model. drives inside Sun X4500 servers for ZeusIOPS SSDs from STEC to function as a high capacity (up to 640 GB) memory FreeNas.org is a free distribution that supports CIFS, NFS, cache. SATA remains his platform of choice for volume data FTP, iSCSI, and provides RAID 0, 1 and 5. Another useful storage. open source tool is DRBD by Linbit HA-Solutions GmbH of Austria. It is designed for mirroring of block-level data in Competition for ZFS comes from the likes of Red Hat’s high-availability clustering. Global File System (GFS), the Linux Logical Volume Man- ager (LVM) and file systems like ext4 and BTRFS. GFS was Open Source Storage Barriers first developed at the University of Minnesota as a means of While the number of applications has certainly blossomed, offering high performance and data sharing capabilities for widespread adoption of open source storage still faces the Linux platform, as well as storage virtualization. While many barriers, both real and imagined. GFS is controlled by Red Hat, LVM comes in a wide range of versions in the open source community. “Open source needs to be seen as more of a turnkey sup- ported solution, even if that is what some vendors already 3 Save Money with Open Source Storage, an Internet.com Storage eBook. © 2009, Internet.com Save Money with Open Source Storage provide, in order to overcome perceptions that open source source as part of a total solution and its overall value propo- is only for those looking to avoid costs, have the time and sition.” people to integrate, or is just one big computer science project,” said Schulz. Similarly, Chip Nickolett, owner of Comprehensive Consult- ing Solutions of Brookfield, Wisc., thinks we have yet to He also believes that the very essence of open source — be- see the best of open source. To his mind, the big hurdle is ing free — gets in the way of broad acceptance. convincing core storage professionals, who tend to regard storage as being so important from a performance, data “People tend to think that free means less value than what integrity, backup, and disaster recovery perspective that they you might pay for, or less value and stability than for software are willing to spend the money on a SAN or other pricey that you might otherwise buy,” he said. “Likewise, there can storage hardware. They just aren’t that interested in saving a be a support concern or misperception that you might add a few pennies on a potentially risky and — to them — unproven lot of cost and complexity by having to integrate the solu- open source venture. Until that mindset shifts, he thinks tion.” open source will struggle around in the fringes of the storage universe. Others, Schulz said, avoid it because they are in the midst of heavy head-count reductions and have the idea that addi- “I really haven’t seen much traction on the open source stor- tional staff will be required to support open source. But the age side of things,” said Nickolett. “There are backup and biggest barrier may be more fundamental.
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