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'''LIO''' ('''{{LIO servername}}''') is the standard open-source [[SCSI]] [[Target]] for shared data storage in Linux. It supports all prevalent storage fabrics, including [[Fibre Channel]] ([http://www.qlogic.com QLogic]), [[Fibre Channel over Ethernet|FCoE]], iEEE 1394, [[iSCSI]], [[iSER]] ([http://www.mellanox.com/ Mellanox] [[InfiniBand]]), [[SRP]] (Mellanox InfiniBand), USB, [[vHost]], etc.
'''LIO''' ('''{{LIO servername}}''') is the standard open-source [[SCSI]] [[Target]] for shared data storage in Linux. It supports all prevalent storage fabrics, including [[Fibre Channel]] ([http://www.qlogic.com QLogic]), [[Fibre Channel over Ethernet|FCoE]], iEEE 1394, [[iSCSI]], [[iSER]] ([http://www.mellanox.com/ Mellanox] [[InfiniBand]]), [[SRP]] (Mellanox InfiniBand), USB, [[vHost]], etc.
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The advanced feature set of LIO has made it the storage target of choice for many storage array vendors, for instance allowing them to achieve [[VMware]]® Ready certifications. Native support for LIO Target in QEMU/[[KVM]], libvirt, and OpenStack™ makes it an attractive storage option for cloud deployments.
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The advanced feature set of LIO has made it the SCSI Target of choice for many storage array vendors, for instance allowing them to achieve [[VMware]]® Ready certifications. Native support for LIO SCSI Target in QEMU/[[KVM]], libvirt, and OpenStack™ makes it an attractive storage option for cloud deployments.
LIO includes [[targetcli]], a management shell and API with a single namespace for all storage objects.
LIO includes [[targetcli]], a management shell and API with a single namespace for all storage objects.
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'''Architecture'''
'''Architecture'''
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The target engine implements the semantics of a SCSI target.  
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The SCSI target engine implements the generic SCSI semantics.  
* High-performance, non-blocking, multithreaded architecture with SSE4.2 support and no single-point of failure
* High-performance, non-blocking, multithreaded architecture with SSE4.2 support and no single-point of failure
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<!-- Compatibility and certifications -->
<!-- Compatibility and certifications -->
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{{Main Page Subbox|#cef2e0|#a3bfb1|Compatibility and certifications|The Target works with Initiators of the following operating systems:
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{{Main Page Subbox|#cef2e0|#a3bfb1|Compatibility and certifications|The SCSI Target works with Initiators of the following operating systems:
* Microsoft: Windows&reg; Server 2003/2008/R2 and Windows&reg; XP/Vista/7
* Microsoft: Windows&reg; Server 2003/2008/R2 and Windows&reg; XP/Vista/7
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* VMs: [[VMware&nbsp;vSphere|vSphere]]&trade;&nbsp;5, Red&nbsp;Hat [[Kernel-based Virtual Machine|KVM]], Microsoft Hyper-V, Oracle xVM/VirtualBox, Xen
* VMs: [[VMware&nbsp;vSphere|vSphere]]&trade;&nbsp;5, Red&nbsp;Hat [[Kernel-based Virtual Machine|KVM]], Microsoft Hyper-V, Oracle xVM/VirtualBox, Xen
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The Target enables [[VMware]] Ready certifications (incl. [[VMware vSphere|vSphere]]&trade;&nbsp;5). It also passes the Microsoft [http://en.wikipedia.org/wiki/Windows_Server_2008 Windows&reg; Server 2008] / [http://en.wikipedia.org/wiki/Windows_Server_2008_R2 R2] [http://en.wikipedia.org/wiki/High-availability_cluster Failover Cluster] compatibility test suites.
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The SCSI Target enables [[VMware]] Ready certifications (incl. [[VMware vSphere|vSphere]]&trade;&nbsp;5). It also passes the Microsoft [http://en.wikipedia.org/wiki/Windows_Server_2008 Windows&reg; Server 2008] / [http://en.wikipedia.org/wiki/Windows_Server_2008_R2 R2] [http://en.wikipedia.org/wiki/High-availability_cluster Failover Cluster] compatibility test suites.
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Revision as of 21:17, 9 June 2013

Welcome to Linux-IO,
the Linux Unified SCSI Target.
100 articles, 91,002,149 pageviews

Summary

LIO (Linux-IO) is the standard open-source SCSI Target for shared data storage in Linux. It supports all prevalent storage fabrics, including Fibre Channel (QLogic), FCoE, iEEE 1394, iSCSI, iSER (Mellanox InfiniBand), SRP (Mellanox InfiniBand), USB, vHost, etc.

The advanced feature set of LIO has made it the SCSI Target of choice for many storage array vendors, for instance allowing them to achieve VMware® Ready certifications. Native support for LIO SCSI Target in QEMU/KVM, libvirt, and OpenStack™ makes it an attractive storage option for cloud deployments.

LIO includes targetcli, a management shell and API with a single namespace for all storage objects.

LIO and targetcli are developed by Datera, Inc., a data storage systems and software company located in the Silicon Valley.

Target

Unified SCSI Target

Fabric modules implement the frontend of the SCSI target.

Storage media independence

Backstores implement methods of accessing data on devices.

Architecture

The SCSI target engine implements the generic SCSI semantics.

Advanced SCSI feature set

Compatibility and certifications

The SCSI Target works with Initiators of the following operating systems:
  • Microsoft: Windows® Server 2003/2008/R2 and Windows® XP/Vista/7
  • Apple Mac OS X (via third-party initiator)
  • Linux: RHEL 4/5/6, SLES 10.3/11, CentOS, Debian, Fedora, openSUSE, Ubuntu
  • Unix: Solaris 10, OpenSolaris, HP-UX
  • VMs: vSphere™ 5, Red Hat KVM, Microsoft Hyper-V, Oracle xVM/VirtualBox, Xen

The SCSI Target enables VMware Ready certifications (incl. vSphere™ 5). It also passes the Microsoft Windows® Server 2008 / R2 Failover Cluster compatibility test suites.

Targetcli

targetcli provides the fabric agnostic single-node management shell for LIO SCSI Targets. targetcli aggregates and presents all SAN functionality via the RTSlib library and API [HTML][PDF] to the LIO SCSI Target.

RTS OS

RTS OS integrates the LIO SCSI Target and targetcli into a single-node Unified Storage operating system (Admin Manual). RTS OS supports VMware Ready certification, including VMware vSphere™ 5.

An RTS OS subscription provides access to additional RTS OS packages and update services.

RTS OS is currently being extended into RTS Live, a cluster storage operating system that is based on RTS Director.

High availability and clustering

LIO is designed from gound up to support highly available and cluster storage:
  • Deeply embedded high availability (Network RAID1)
  • Scale-out clusters and disaster recovery solutions

Initiator

The Core-iSCSI Initiator is a high-end iSCSI Initiator that resolves a number of known issues with the Open-iSCSI standard Linux Initiator.

Core-iSCSI is available on Linux and Windows®, and it has been ported to a wide range of platforms and devices, including:

Datera, Inc. ported OCFS2 onto the Nokia Internet Tablets on top of the Core-iSCSI Initiator.

RTS Director

RTS Director is a distributed, highly-available cluster management framework. It comprises a shell, active library and API. The active library and API provide an extensible platform with a unified namespace to manage complex functionality, such as high-availability and cluster striping. The shell offers location-transparent access to all objects in the SAN. New functionality and devices can be added via plugin-modules.

RTS Director provides zero configuration. It is based on a symmetrically distributed architecture - there is no single point of failure, no cluster controller, no central database, etc. Nodes running the RTS Director automatically discover and join the cluster when coming up (demo video).

See also

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