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SCST
Stable release
3.6
/ January 17, 2022 (2022-01-17)
Repository
github.com/SCST-project/scst
Written in
C
Operating system
Linux
Type
Block storage
License
GNU General Public License
Website
scst.sourceforge.net
SCST is a GPL licensed SCSI target software stack.
The design goals of this software stack are high performance, high reliability, strict conformance to existing SCSI standards, being easy to extend and easy to use. SCST does not only support multiple SCSI protocols (iSCSI, FC, SRP, ...) but also supports multiple local storage interfaces (SCSI pass-through, block I/O and file I/O) and also storage drivers implemented in user-space via the scst_user driver.[1]
In order to reach maximum performance SCST has been implemented as a set of kernel drivers. SCST is often combined with RAID, data deduplication and/or high-availability cluster software to augment its functionality. The SCST software stack is the basis software of many SAN systems.[2] Several world records have been set with SAN systems based on SCST.[3][4][5][6]
SCST competes with LIO Target for the same purpose of providing a generic SCSI target module inside the Linux kernel.[7] For the narrower purpose providing a Linux iSCSI target, the older IET and STGT modules also enjoy industry support.[8]
Between 2013 and 2017 SCST was primarily maintained by SanDisk personnel, after Fusion-io acquired the start-up ID7 in 2013, a driving force behind SCST[9][10][11] and after SanDisk acquired Fusion-io in 2014.[12]
^Van Assche, Bart (19 August 2015). SCST, a SCSI Target Framework(PDF). LinuxCon North America 2015. Seattle.
^"New VMmark Cloud Computing World Record set with Cisco UCS, VMware, and Fusion-io". Fusion-io. May 10, 2013. Archived from the original on July 2, 2014. Retrieved August 12, 2018.
^"HP Achieves Two New #1 VMmark Virtualization Benchmarks with ION Data Accelerator". Fusion-io. September 12, 2013. Archived from the original on June 16, 2014. Retrieved August 12, 2018.
^"HP achieves world records for 2P blade and 2P rack-mount server virtualization performance on VMmark 2.5.1 benchmark" (PDF). HP. October 2013.
^"The K2 Tops Two Million IOPS Using a Single All-Flash Storage System". Kaminario. October 4, 2012.
^"A tale of two SCSI targets [LWN.net]".
^Florian Haas, "Replicate Everything! Highly Available iSCSI Storage with DRBD and Pacemaker", (Linux iSCSI: a Tale of Four Targets section) Linux Journal Issue #217, May 2012
^Meyer, David (18 March 2013). "Fusion-io picks up software-defined storage firm ID7 for SCST chops". Gigaom. Retrieved 20 July 2014.
^O'Brien, Kevin (18 March 2013). "Fusion-io Acquires ID7, Developers of SCST". Retrieved 20 July 2014.
^"Fusion-io ID7 - Accelerating Shared Storage with Software Defined Solutions". Fusion-io. Archived from the original on August 4, 2014. Retrieved August 12, 2018.
^Iyer, Jay (23 July 2014). "SanDisk Completes Acquisition of Fusion-io". SanDisk.
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