Calibre RHEL/CentOS 6 Support Overview and Roadmap
 

 

Notice of Intention to Discontinue Calibre Support on RHEL/CentOS 6

 

In order to allow time for platform transition planning, Calibre is providing notice that support for the Red Hat Enterprise Linux® (RHEL) and CentOS version 6 series will be deprecated and then completely discontinued based upon the schedule below.  With Red Hat’s general support for RHEL/CentOS 6 reaching end-of-life in November 2020 and new higher-performance hardware offerings requiring newer OS versions, we have concluded that Calibre 2019.4 is the last release that will offer full support for the RHEL/CentOS 6 series.

 

In coordination with published Red Hat dates, Calibre plans to discontinue support for the RHEL/CentOS 6 OS series per the following schedule: 

 

 

RHEL/CentOS 6.10 is the Recommended RHEL/CentOS 6 Version

 

Note that support for RHEL/CentOS 6.1 through 6.6 is discontinued due to the serious defects described below.  We strongly recommend that any customer currently using earlier versions of RHEL/CentOS 6 upgrade to RHEL/CentOS 6.10 or RHEL/CentOS 7. Calibre will still run on RHEL/CentOS 6.1 through 6.6 releases, but any issues found will need to be reproduced on one of the supported OS versions in order to be addressed.  Please refer to the Mentor Graphics “Linux Distribution Compatibility Statement” on the main Road Map page.

 

RHEL/CentOS 6 Issues Known to Impact Calibre Software

 

·        RHEL/CentOS 6.8
Strongly Recommended: Apply the following kernel patch to fix threading issues (tasklist_lock starvation) in highly-threaded workloads: kernel v2.6.32-696.

·        RHEL/CentOS 6.7
Strongly Recommended: RHBA-2015:1822 fixes the race condition in the malloc API
Recommended:  RHBA-2015:1992 Superseded patch of RHBA-2015:1827 fixes automounter error "set_tsd_user_vars:  failed to get passwd info from getpwuid_r"

·        RHEL/CentOS 6.6
Calibre can hang on fourth generation Intel processors due to a RHEL/CentOS 6.6 OS issue. Reference KB Article 590923. This problem can be fixed by patching the kernel, or (preferably) by upgrading to RHEL/CentOS 6.10.

·        RHEL/CentOS 6.5
A RHEL/CentOS 6.5 performance degradation related to BIOS settings on some hardware models has been observed and has been investigated. The only user observable symptom of the problem is a machine that should be running at 100% CPU usage is running at 75% CPU usage. 

·        This problem does not cause corruption or data loss

·        The problem occurs with RHEL/CentOS 6.5 in conjunction with some hardware

·        We do not know and have no way to easily determine if the issue affects a particular hardware or CPU model

·        The problem is entirely performance related

·        This has not been with RHEL/CentOS 6.6 or newer

 

RHEL/CentOS 6 Retro-qualification of Older Calibre Releases

 

In order to support customer requirements for upgrading to new hardware and associated operating systems, Calibre has qualified or partially qualified a number of older Calibre releases on RHEL/CentOS 6. RHEL/CentOS 6 support was initially introduced with the Calibre 2011.2 release.  Older release branches (2008 – 2011.1) were subsequently patched and qualified. Please note that if you want to use those older Calibre release branches on RHEL/CentOS 6 systems, a newer Calibre version (a patch release) will be required that enables execution. Please contact Mentor Graphics Customer Support for more details or to request the latest patch that provides RHEL/CentOS 6 support for specific release branches.

 

Also note that all releases prior to Calibre 2009.3 will consume a license for hyper-threaded virtual cores on Intel i3, i5, and i7 processors or newer. The capability to handle these hyper-threaded virtual cores without consuming a license is available with Calibre 2009.3 and newer releases.

 

 

RHEL/CentOS 6 Support for Specific Calibre Releases

 

Calibre Releases

RHEL
CentOS

6.1-6.3

RHEL
CentOS

6.4-6.6

RHEL
CentOS

6.7

RHEL
CentOS

6.8-6.10

2008 - 2010

*

*

 

*

2011.1

*

*

 

*

2011.2/3/4

 

 

 

 

2012 - 2015

 

 

 

 

2016 - 2017

 

 

 

 

2018 - 2019

 

 

 

 

2020

 

 

 

 

2021

 

 

 

 

2022 – 2024.2

 

 

 

limited

2024.3+

 

 

 

 

 

*

Supported, contact Calibre Customer Support for the latest patch that supports RHEL/CentOS 6 or 7 systems

 

Supported

 

Still supported but not recommended

limited

Still supported, not recommended, enabling environment variable required

 

Discontinued, no support


Please see Table 1, Calibre Platform Identifiers, on the main Calibre Platform Support Overview and Roadmap page for which platform identifiers that can be used with each OS version.

Updated 30 Oct 2020
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