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| Back | CentOS 2 | CentOS 3 | CentOS 4 | CentOS 5 | |
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| Architectures support | |||||
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Supports x86 Systems (32-bit Pentium, AMD, Via) |
Yes | Yes | Yes | Yes | |
|
Supports ia64 systems (1) (Itanium2) |
No | Yes | Yes | No (9) | |
|
Supports x86_64 systems (AMD64/EM64T) |
No | Yes | Yes | Yes | |
|
Supports s390/s390x systems (IBM zSeries & IBM S/390) |
No | Yes | Yes | No | |
|
Supports ppc/ppc64 systems (IBM Power, Mac) |
No | No | Yes | No (9) | |
|
Supports SPARC systems (Sun SPARC processors) |
No | No | Yes | No (9) | |
|
Supports Alpha systems (DEC Alpha processors) |
No | No | Yes | No | |
| CPU / Memory / Filesystem limits (Tested[/possible]) (5) | |||||
| Maximum logical CPUs (2) | |||||
| x86 | 8 | 16 | 32 | 32 | |
| ia64 | n/a | 8 | 64/512 | n/a | |
| x86_64 | n/a | 8 | 64/64 | 64/255 | |
| PPC | n/a | n/a | 64/128 | n/a | |
| s390/S390x | n/a | 8 | 8 | n/a | |
| SPARC | n/a | n/a | 8/64 | n/a | |
| Alpha | n/a | n/a | 8/64 | n/a | |
| Maximum memory | |||||
| x86 (4) | 16GB | 64GB | 64GB | 16GB (7) | |
| ia64 | 32GB | 128GB | 256GB/1024TB | n/a | |
| x86_64 | n/a | 128GB | 128GB/1TB | 256GB/1TB | |
| PPC | n/a | n/a | 128GB/1TB | n/a | |
| s390/390x | n/a | 64GB | 64GB | n/a | |
| SPARC | n/a | n/a | 64GB | n/a | |
| Alpha | n/a | n/a | 64GB | n/a | |
| Filesystem | |||||
| Maximum filesize | 1TB | 2TB (3) | 2TB | 2TB | |
| Maximum filesystem size (Ext3) | 1TB | 2TB (3) | 8TB | 8TB/16TB | |
| Other | |||||
| Maximum x86 per-process virtual address space | 3GB | Approx 4GB | Approx 4GB | Approx 3GB (7) | |
| Recommend minimums | |||||
| Minimum memory | |||||
| x86 | 128M CLI / 256M GUI | 128M CLI / 256M GUI | 128M CLI / 256M GUI | 128M CLI / 512M GUI | |
| Other architectures | 512M | 512M | 512M | 512M | |
| Other | |||||
| Minimum diskspace | 500M | 800M | 800M | 1.2GB | |
| OS features (Kernel, Server, Client, etc.) | |||||
| Kernel foundation | Linux 2.4.9 | Linux 2.4.21 | Linux 2.6.9 | Linux 2.6.18 | |
| Compiler/toolchain | GCC 2.9.6 | GCC 3.2 | GCC 3.4 | GCC 4.1 | |
| Languages supported | 4 | 10 | 15 | 19 | |
| SELinux | No | No | Yes | Yes | |
| Ext3 Performance Enhancements | No | No | Yes | Yes | |
| Bluetooth support | No | No | Yes | Yes | |
| Native POSIX Threading Library (NPTL) | No | Yes | Yes | Yes | |
| Hyperthreading scheduler | No | Yes | Yes | Yes | |
| Autofs V4 | No | Yes | Yes | Yes | |
| Logical Volume Manager (LVM) | No | Yes - LVM1 | Yes - LVM2 | Yes - LVM2 | |
| Auditing | No | Yes - LAus | Yes - audit | Yes - audit | |
| Compatibility libraries (toolchain) | No | Yes - CentOS-2 | Yes - CentOS-2 & CentOS-3 | Yes - CentOS-3 & CentOS-4 | |
| LSB compliant | Yes - 1.2 | Yes - 1.3 | Yes - 3 | Yes - 3.1 | |
| NFS | Yes - V3 | Yes - V3 | Yes - V3 & V4 | Yes - V3 & V4 | |
| Web Server | apache 1.3.27 | httpd 2.0.46 (apache) | httpd 2.0.52 (apache) | httpd 2.2.3 (apache) | |
| Database | MySQL 3.23.58, PostgreSQL 7.1.x | MySQL 3.23.58, PostgreSQL 7.3.x | MySQL 4.1.x, PostgreSQL 7.4.x | MySQL 5.0.x, PostgreSQL 8.1.x | |
| Programming Langauges | php 4.1.2, python 1.5, perl 5.6.1 | php 4.3.2, python 2.2, perl 5.8.0 | php 4.3.9, python 2.3, perl 5.8.5 | php 5.1.6, python 2.4, perl 5.8.8 | Desktop GUI | Gnome 2.0, KDE 2.2 | Gnome 2.2, KDE 3.1 | Gnome 2.8, KDE 3.3 | Gnome 2.16, KDE 3.5 |
| Graphics | XFree86 4.1.x | XFree86 4.3.x | X.org 6.8.2 | X.org 7.1.x | |
| OpenOffice | No | Yes - 1.1.2 |
Yes - 1.1.5 (2.0.4 optional) |
Yes - 2.3.x | |
| Ximian Evolution | No | Yes - 1.4 |
Yes - 2.0 (2.8 optional) |
Yes - 2.12 | |
| Default browser | Seamonkey 1.0.9 (6) | Seamonkey 1.0.9 (8) | Firefox 1.5.x | Firefox 3.0.x | |
| Multimedia capabilities | No | No | Yes (no mp3) | Yes (no mp3) | |
| Plug and play | No | No | Yes | Yes | |
| Other items (available seperately from CentOS) | |||||
| Cluster Suite | No | Yes - 3 | Yes - 4 | n/a (now included in base OS) | |
| Global File System | No | Yes - 6.0 | Yes - 6.1 | n/a (GFS2 now included in base OS) | |
| End of Lifetime (EOL) Dates | |||||
| Full Updates (10) | May 31st, 2005 | October 31st, 2006 | February 29th, 2009 | March 31st, 2011 | |
| Maintenance Updates (11) | May 31st, 2009 | October 31st, 2010 | February 29th, 2012 | March 31st, 2014 | |
| Back | CentOS 2 | CentOS 3 | CentOS 4 | CentOS 5 | |
(1) Itanium2 only; the original Intel Itanium processor is not supported.
(2) 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.
(3) Starting with CentOS-3.5, the maximum filesize and maximum filesystem size is 2TB for CentOS-3. Prior to CentOS-3.5, the limit for both was 1TB.
(4) 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.
(5) 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.
(6) Netscape 4.8 was the original browser in CentOS-2, it was upgraded to Mozilla 1.7 in April 2005 and to Seamonkey 1.0.9 in April 2008
(7) The x86 "Hugemem" kernel is not provided in CentOS 5.
(8) Mozilla was upgraded to Seamonkey for CentOS-3.8 in July 2006.
(9) Support is expected, development currently in progress.
(10) 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 2-4 times per year, with new ISOs released as part of each Update Set. In the 4.x numbering scheme, the .x is the number of the Update Set.
(11) 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.