Platform Identifiers for Calibre Install Files and Runtime Directories
Calibre provides different executables that are optimized for different Linux distributions, and each has its own platform identifier. The platform identifier is sometimes referred to as a VCO, which refers to a Vendor-CPU-OS combination. The platform identifier is first used to identify which install files should be downloaded. After installation the platform identifier and release version number are used to identify the Calibre runtime directory, generally referred to as a MGC_HOME tree. Each Calibre MGC_HOME tree can only be used with specific OS versions and must run on hardware that supports the minimum CPU instruction set identified for that MGC_HOME tree. Note that when using Calibre with distributed processing, the MGC_HOME trees on the master host and all remote hosts must all have the same platform identifier.
AOJ, AOK, and SOA MGC_HOME trees as well as all MGC_HOME trees starting with Calibre 2024.3 require the AVX2 minimum CPU instruction set.
Important Note: The RSH utility is not provided with RHEL 8. Customers currently using the RSH utility for Cali bre distributed processing will need to switch to a different utility, such as SSH, before they can use the Calibre AOK MGC_HOME software on RHEL 8.
Calibre Support Summary for Linux x86-64
- All 2020 Calibre releases are supported with AOI and AOJ MGC_HOME trees.
- All 2021-2023 Calibre releases are supported with AOI, AOJ, and AOK MGC_HOME trees.
- 2023.3+ Calibre releases are supported with AOI, AOJ, AOK, and SOA MGC_HOME trees.
Calibre Support Overview
Calibre releases running on RHEL 8 require an AOK MGC_HOME tree and support for the AVX2 CPU instruction set.
Calibre releases running on SLES 15 require support for the AVX2 CPU instruction set.
Calibre releases 2020.1 through 2024.2 running on RHEL/CentOS 6, RHEL/CentOS 7, SLES 11, and SLES 12 are supported with AOI and AOJ MGC_HOME trees.
Calibre releases 2024.3 and later running on RHEL/CentOS 7 or SLES 12 require an AOJ MGC_HOME tree and support for the AVX2 CPU instruction set.
Please see Table 1, Calibre Platform Identifiers, for full details on which platform identifiers that can be used with each OS version.
RHEL/CentOS 6.10 is last minor release for RHEL/CentOS 6. RHEL/CentOS 7.9 is the last minor release for RHEL/CentOS 7.
Calibre System Configurations
The Calibre tools may require a minimum OS patch level for each supported OS. Please see the Calibre Administrator s Guide provided with the particular Calibre release you are interested in. The Calibre Administrator’s Guide provides release-specific information on required patch levels and other information on supported environments.
Notice of Intention to Discontinue Calibre Support on RHEL/CentOS 6
Only very limited support will be provided for 2022-2024 versions of Calibre on RHEL/CentOS 6. Calibre will require a special setting to enable execution for these versions. The 2024.2 Calibre Release (Jun 2024) will be the last release to support RHEL/CentOS 6 and SLES 11 SP4. For further information please see the Calibre RHEL/CentOS 6 Roadmap page.
Updated 27 Mar 2024
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