Enterprise Storage OS
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| Original author(s) | Marc A. Smith |
|---|---|
| Initial release | January 2012 |
| Preview release | trunk/r755
/ January 30, 2015 |
| Type | Linux distribution |
| License | GNU GPL v3 |
| Website | www |
Enterprise Storage OS, also known as ESOS, is a GPL licensed Linux distribution that serves as a block-level storage platform in a Storage Area Network[1]. ESOS is composed of OSS projects that are required for a Linux distribution and several proprietary build/install time options that provide RAID / Storage Area Network functionality.[2] The SCST project is the core component of ESOS; it provides the back-end storage to Storage Area Network functionality.[3]
Platform
ESOS is a niche Linux distribution. ESOS is intended to run on a USB flash drive, or some other type of removable media such as Secure Digital, CompactFlash, etc. ESOS is a memory resident operating system: At boot, a tmpfs file system is initialized as the root file system and the USB flash drive image is copied onto this file system.[4] Configuration files and logs are periodically written to a USB flash drive (persistent storage) or by user intervention when configuration changes occur.[5]
Interface
ESOS utilizes a Text-based User Interface (TUI) as the UI for system management, network configuration, and storage provisioning functions.[6] The TUI used in ESOS is written in C; the ncurses and CDK libraries are used by the TUI program.
Front-End Connectivity
ESOS supports connectivity on several different front-end Storage Area Network technologies[7]. These core functions are supported by SCST and third-party target drivers that vendors have developed for SCST[8]:
- Fibre Channel: QLogic HBAs are natively supported, and Emulex OneConnect FC HBAs can be supported by a build time option (requiring the Emulex OCS SDK)[9].
- InfiniBand: Mellanox, QLogic, and Chelsio IB HCAs, among others, are supported[10]
- Fibre Channel over Ethernet (FCoE): A software FCoE target implementation supports NICs with DCB/DCBX capabilities, or build time options exist for supporting Emulex OneConnect FCoE CNAs (requires the Emulex OCS SDK) and Chelsio Uwire FCoE CNAs.[11]
- iSCSI: Will work over any IP communication method supported by ESOS (Ethernet, IPoIB).
Back-End Storage
OSS projects and commodity server hardware are used on the back-end side to provide the underlying storage utilized by the front-end target interfaces:
- Btrfs, XFS, and ext4 are all supported file systems for virtual disk files used with the “vdisk_fileio” device handler.
- Popular, modern hardware RAID controllers from LSI, Adaptec, HP, and Areca are also supported in ESOS, including install-time CLI tool integration for these adapters.
- Clustering and high-availability support is made possible by the Pacemaker and Corosync cluster software stack.
- DRBD is fully supported to facilitate replication between ESOS storage servers, and/or to create redundant ESOS storage server clusters.
- Virtual Tape Library (VTL) support by the mhVTL project.
- Three SSD caching solutions: EnhanceIO, bcache, and dm-cache (lvmcache).
- Other block storage functions include the automated tiered storage via the BTIER project and Ceph RBD mapping.
Installation
ESOS differs from popular Linux distributions in that there is no bootable [[ISO image] provided. ESOS consists of one archive file that is extracted on a local computer running a supported operating system (Linux, Windows, or Mac OS X).[11] The local computer is only used for installing the ESOS image to a USB flash drive (or other removable media device).[12] Users of ESOS extract the archive and execute the ESOS install script. The ESOS installer script prompts the user for the installation target device, writes the image, and allow users to integrate proprietary CLI RAID controller utilities into the ESOS USB flash drive.
References
- ^ DataON Storage (5 February 2015). "Mott College Slashed Storage Costs with DataON Storage".
- ^ Marc Smith (24 May 2012). "Implementing Enterprise Disk Arrays Using Open Source Software" (PDF).
- ^ Marc Smith (16 April 2013). "Building & Using a Highly Available ESOS Disk Array".
- ^ Marc Smith (3 June 2014). "Virtual Desktops - From Pilot to Reality and the Trip We Made".
- ^ Marc Smith (15 May 2013). "Building and Using Open Source Storage Solutions" (PDF).
- ^ Marc Smith (11 August 2012). "ESOS Update (8/11/2012)".
- ^ ”HA Guru” (12 February 2013). "Linux as an Open Storage Server".
- ^ Marc Smith (24 July 2014). "ESOS Project Update (July 2014)".
- ^ Avago Technologies (15 December 2014). "Mott Community College Increases Storage Performance with High-Availability Solution" (PDF).
- ^ ”Monster Network!” (16 March 2014). "Phase 10 is complete".
- ^ a b Marc Smith (14 July 2014). "Open Storage: Dual-Controller OSS Disk Array".
- ^ Marc Smith (10 March 2013). "ESOS Project Status & Updates (March 2013)".
External Links
- Official Website
- SCST Project Generic SCSI Target Subsystem for Linux
Category:Free software Category:X86-64 Linux distributions Category:Computer storage Category:Storage software
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