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| Computing Division |
End of Support for RHEL4 and SL4
UNIX at SLAC
Linux at SLAC
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End of Support for RHEL4 and SL4 |
SLAC Computing
UNIX at SLAC Linux at SLAC |
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| Updated: 26 Oct 2011 |
Vendor support for Red Hat Enterprise Linux 4 (RHEL4) and Scientific Linux 4 (SL4) is scheduled to end in February 2012 (29 Feb 2012 for RHEL4 and 2 Feb 2012 for SL4). After those dates there will be no further security patches for these Linux distributions.
SLAC's Computing Division has set a goal of either upgrading or retiring as many RHEL4 and SL4 machines as possible by 9 Dec 2011. To achieve this goal we are taking the following steps.
Effective immediately, we are imposing a moratorium on new installations of RHEL4 or SL4.
Users of RHEL4 and SL4 desktop systems should be contacted in the near future by their IT Departmental Support person to schedule an upgrade to a newer release of RHEL or to retire the system as soon as possible.
There are currently several pools of RHEL4 and SL4 machines available for public login:
| Pool names | OS |
|---|---|
| "rhel4-32", "rhel4-32-test" | 32-bit RHEL4 |
| "rhel4-64", "rhel4-64-test" | 64-bit RHEL4 |
| "sl4-32", "sl4-32-test" | 32-bit SL4 |
In the near future we will limit access to these systems (see below).
The only RHEL4/SL4 resources in the public batch farm are three batch build machines:
| Server name | OS |
|---|---|
| bldlnx01 | 32-bit SL4 |
| bldlnx02 | 32-bit SL4 |
| bldlnx09 | 64-bit RHEL4 |
In the near future we will limit access to these systems (see below).
We will work with the owners of private RHEL4 batch clusters to either upgrade or retire their systems.
There are a number of other RHEL4/SL4 servers currently in use. We will be contacting the users responsible for these servers to plan for their upgrade or retirement.
- Restricted access to RHEL4/SL4
public login and batch build machinesOn Tuesday morning, 15 Nov, we will restrict access to the following pools of public machines:
Current users of these pools should begin using one of the other pools of public interactive compute servers:
| Pool names | OS |
|---|---|
| "rhel6-32", "rhel6-32-test" | 32-bit RHEL6 |
| "rhel6-64", "rhel6-64-test" | 64-bit RHEL6 |
| "rhel5-32" (aka "noric", "yakut"), "rhel5-32-test" |
32-bit RHEL5 |
| "rhel5-64", "rhel5-64-test" | 64-bit RHEL5 |
Also on Tuesday, 15 Nov, we will restrict access to the RHEL4/SL4 batch build machines:
The LSF batch queue "bld4q" has been established to allow a restricted group of users to run RHEL4/SL4 build jobs. These servers have been removed from all other "build" queues.
If you believe you will have a critical dependence on one of these RHEL4/SL4 login pools or batch build systems after 15 Nov, please send an email to unix-admin@slac.stanford.edu explaining: