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.
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 representationEdit
Xsan file system uses several logical storages 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 storages for data and metadata. The file system supports dynamic expansion and distribution of both data and metadata areas.
HistoryEdit
Box artwork for Xsan versions 1.0–1.4.
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 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]
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Xsan ˈ ɛ k s ae n 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 XsanDeveloper s Apple Inc Initial releaseJanuary 4 2005 1 Stable release5 0 1 included in macOS Server 5 11 1 released December 14 2020 Operating systemmacOSTypeShared disk file systemLicenseProprietaryWebsitemacOS Server specsXsan 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 Contents 1 Interoperability 2 Data representation 3 History 4 ReferencesInteroperability EditXsan 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 RAIDandAllows 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 EditXsan file system uses several logical storages 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 storages for data and metadata The file system supports dynamic expansion and distribution of both data and metadata areas History Edit nbsp Box artwork for Xsan versions 1 0 1 4 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 EditKrypted com Xsan Tutorials and Documentation Apple Introduces Xsan Storage Area Network File System Xsan Introduction Archived from the original on October 20 2007 Apple Introduces Xsan Storage Area Network File System Apple Inc Xsan 2 for traditional IT services StorNext FX and FX2 Archived from the original on December 19 2021 Retrieved November 5 2008 Review Questions Client Management in Xsan TCP and UDP ports used by Apple software products Apple Inc Retrieved February 14 2017 Apple Ships Xsan Storage Area Network File System Apple Inc Info Mac View Topic Apple Introduces Xsan 2 Archived March 10 2008 at the Wayback Machine Apple Releases Xsan 2 2 Updates Xsan versions included with or required by OS X Apple Releases Xsan 2 2 2 Filesystem Update OS X Server 2 2 5 iTunes October 16 2014 Retrieved from https en wikipedia org w index php title Xsan amp oldid 1169480628, wikipedia, wiki, book, books, library,
