Centos 5 Product Specification

1 CentOS4 has reached end-of-life. It is highly recommended to use CentOS5 or 6.

2 During the Full Updates phase, new hardware support will be provided at the discretion of CentOS via Update Sets. Additionally, all available and qualified errata will be provided via Update Sets (or individually {and immediately} for Security level errata.) Update Sets normally will be released 2-3 times per year, with new ISOs released as part of each Update Set. In the x.y numbering scheme, the .y is the number of the Update Set.

3 During the Maintenance updates phase, only Security errata and select mission critical bug fixes will be released. There will be few, if any, Update Sets released.

4 Only PAE-capable CPUs are supported, see http://wiki.centos.org/FAQ/CentOS6#head-d31388203ee81d3a47cb97bfc1c8206c3de85095

5 Itanium2 only; the original Intel Itanium processor is not supported.

6 Support is expected, development currently in progress.

7 Beta expected for 6.3.

8 Please note that limits for CentOS-4 are for CentOS-4.3 and later. CentOS-4.3 was released in April 2006. CPU counts over 8 (x86_64) or 64 (other architectures) require use of the largesmp kernel.

9 Logical CPUs are equivalent to cores/virtualCPUs, so a dual-core (non-hyperthreading) CPU is counted as 2 logical CPUs and a single hyperthreading CPU is counted as 2 logical CPUs for purposes of calculating total CPUs.

10 The "SMP" kernel supports a maximum of 16GB of main memory. Systems with more than 16GB of main memory use the "Hugemem" kernel. In certain workload scenarios it may be advantageous to use the "Hugemem" kernel on systems with more than 12GB of main memory.

11 The x86 "Hugemem" kernel is not provided in CentOS 5.

12 The x86 "Hugemem" kernel is not provided in CentOS 6.

13 While 1EB is nominally supported under ext4, CentOS' upstream has not backported a needed patch to the ext4 tools permitting manipulating such partitions as of the update at CentOS 6.3. It is possible to use partitions created using third-party distributions' later e4fsprogs tools. General information upstream

14 The x86 "Hugemem" kernel is not provided in CentOS 5.

15 The x86 "Hugemem" kernel is not provided in CentOS 6.

16 The initial 6.0 low end of a nominal 128M minimum is probably overly optimistic, even for a TUI install. Starting with the 6.1 point update of CentOS 6, dependency solving is a massive ram hog

17 bootable p2v- and v2v-ISO-images are provided starting with 6.3, see also http://wiki.centos.org/Manuals/ReleaseNotes/CentOS6.3#head-2e2994dcc0edf71ebb47daa0b808b9d83f91f7b2

18 Recommended in text mode, graphical modes required 1GB

19 starting with CentOS 5.3

20 Initially from CentOS 5.0 through 5.5, LSB version was 3.1. Upgraded to LSB 4.0 in CentOS 5.6

21 Suite will be updated during lifecycle

22 Openoffice is discontinued in 6.3

23 Suite will be updated during lifecycle