Xsan
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| Xsan | |
|---|---|
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| [[Programmer|DeveloperTemplate:Pluralize from text]] | Apple Inc. |
| Initial release | January 4, 2005[1] |
| Operating system | macOS |
| Type | Shared disk file system |
| License | Proprietary |
| Website | macOS Server specs |
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Xsan (/ˈɛksæn/) is Apple Inc.'s storage area network (SAN) or clustered file system for macOS. Xsan enables multiple Mac desktop and Xserve systems to access shared block storage over a Fibre Channel network. With the Xsan file system installed, these computers can read and write to the same storage volume at the same time. Xsan is a complete SAN solution that includes the metadata controller software, the file system client software, and integrated setup, management and monitoring tools.
Xsan has all the normal features to be expected in an enterprise shared disk file system, including support for large files and file systems, multiple mounted file systems, metadata controller failover for fault tolerance, and support for multiple operating systems.
Interoperability
Xsan is based on the StorNext File System made by Quantum Corporation.[2] The StorNext File System and the Xsan file system share the same file system layout and the same protocol when talking to the metadata server. They also seem to share a common code base or very close development based on the new features developed for both file systems.
The Xsan website claims complete interoperability[3] with the StorNext File System: "And because Xsan is completely interoperable with Quantum’s StorNext File System, you can even provide clients on Windows, Linux, and other UNIX platforms with direct Fibre Channel block-level access to the data in your Xsan-managed storage pool."[4]
Quantum Corporation claims: "Complete interoperability with Apple’s Xsan and Promise RAID and Allows Xsan and Xserve RAID to support AIX, HP-UX, IRIX, Red Hat Linux, SuSE Linux, Mac OS X, Solaris, and Windows clients, including support for 64 Bit Windows and Windows Vista."[5]
Some of the command line tools for Xsan begin with the letters cv, which stand for CentraVision – the original name for the file system.[6] XSan clients use TCP ports 49152–65535, with TCP/63146 frequently showing in log files.[7]
Data representation
Xsan file system uses several logical stores to distribute information. The two main classes of information appear on Xsan: the user data (such as files) and the file system metadata (such as folders, file names, file allocation information and so on). Most configurations use different stores for data and metadata. The file system supports dynamic expansion and distribution of both data and metadata areas.
History
On January 4, 2005, Apple announced shipping of Xsan.[8]
In May 2006, Apple released Xsan 1.2 with support for volume sizes of nearly 2 petabytes.
On August 7, 2006, Apple announced Xsan 1.4, which is available for Intel-based Macintosh computers as a Universal binary and supports file system access control lists.
On December 5, 2006, Apple released Xsan 1.4.1.
On October 18, 2007, Apple released Xsan 1.4.2, which resolves several reliability and compatibility issues.
On February 19, 2008, Apple released Xsan 2, the first major update, which introduces MultiSAN, and completely redesigned administration tools.[9] 2.1 was introduced on June 10, 2008. 2.1.1 was introduced on October 15, 2008. 2.2 was released September 14, 2009.[10]
On July 20, 2011, Apple released Xsan 2.3, included in Mac OS X Lion. This was the first version of Xsan included with macOS.[11]
On August 25, 2011, Apple released Xsan 2.2.2, which brought along several reliability fixes.[12]
On July 25, 2012, Apple released Xsan 3, included in OS X Mountain Lion.[13]
On October 17, 2014, Apple released Xsan 4 with OS X Yosemite.
On September 20, 2016, Apple released Xsan 5 with macOS Sierra and macOS Server 5.2.
On November 12, 2020, Apple release Xsan 7 with macOS Big Sur.
References
- ^ Page Module:Citation/CS1/styles.css has no content."Apple Introduces Xsan Storage Area Network File System". Archived from the original on June 2, 2016. Retrieved September 18, 2017.
- ^ Page Module:Citation/CS1/styles.css has no content."Xsan Introduction". Archived from the original on October 20, 2007.
- ^ Page Module:Citation/CS1/styles.css has no content."Apple Introduces Xsan Storage Area Network File System". Apple Inc. Archived from the original on March 29, 2011. Retrieved September 18, 2017.
- ^ Page Module:Citation/CS1/styles.css has no content."Xsan 2 for traditional IT services". Archived from the original on July 29, 2012. Retrieved September 18, 2017.
- ^ Page Module:Citation/CS1/styles.css has no content."StorNext FX and FX2". Archived from the original on December 19, 2021. Retrieved November 5, 2008.
- ^ Page Module:Citation/CS1/styles.css has no content."Review Questions - Client Management in Xsan". Archived from the original on December 19, 2021. Retrieved January 21, 2021.
- ^ Page Module:Citation/CS1/styles.css has no content."TCP and UDP ports used by Apple software products". Apple Inc. Archived from the original on September 13, 2016. Retrieved February 14, 2017.
- ^ Page Module:Citation/CS1/styles.css has no content."Apple Ships Xsan Storage Area Network File System". Apple Inc. Archived from the original on March 29, 2011. Retrieved September 18, 2017.
- ^ Info-Mac: View Topic – Apple Introduces Xsan 2 Script error: No such module "webarchive".
- ^ Apple Releases Xsan 2.2 Updates
- ^ Page Module:Citation/CS1/styles.css has no content."Xsan versions included with or required by OS X". Archived from the original on January 21, 2022. Retrieved October 27, 2016.
- ^ Page Module:Citation/CS1/styles.css has no content."Apple Releases Xsan 2.2.2 Filesystem Update". Archived from the original on February 18, 2025. Retrieved June 16, 2025.
- ^ Page Module:Citation/CS1/styles.css has no content."OS X Server 2.2.5". iTunes. October 16, 2014. Archived from the original on July 28, 2012.
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