Below chart shows you the comparison of various features of Red Hat Enterprise Linux between version 4, 5 and 6.
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Version 4 | Version 5 | Version 6 | |
Maximum Logical CPUs | |||
X86 | 32 | 32 | 32 |
Itanium 2 | 256/512 | 256/1024 | NA |
X86_64 | 64/64 | 160/255 | 160/4096 |
POWER | 64/128 | 128/128 | 128 |
Maximum Memory | |||
X86 | 64GB | 16GB | 16GB |
Itanium 2 | 2TB | 2TB | NA |
X86_64 | 256GB/1TB | 1TB | 3TB/64TB |
POWER | 128GB/1TB | 512GB/1TB | 2TB |
Required Minimum | |||
X86 | 256MB | 512MB minimum/1GB/logical CPU recommended | 512MB minimum/1GB/logical CPU recommended |
X86_64 | 256MB | 512MB minimum/1GB/logical CPU recommended | 512MB minimum/1GB/logical CPU recommended |
Itanium 2 | 512MB | 512MB minimum/1GB/logical CPU recommended | NA |
POWER | 512MB | 1GB minimum/ 2GB recommended | 2GB minimum/ 2GB required per install |
Minimum Disk Space | 800MB | 1GB minimum/ 5GB recommended | 1GB minimum/ 5GB recommended |
File systems & storage limits | |||
Maximum filesize (Ext3) | 2TB | 2TB | 2TB |
Maximum filesystem size (Ext3) | 8TB | 16TB | 16TB |
Maximum filesize (Ext4) | --- | 16TB | 16TB |
Maximum filesystem size (Ext4) | --- | 16TB | 16TB |
Maximum filesize (GFS) | 16TB/8EB * | 16TB/8EB * | NA |
Maximum filesystem size (GFS) | 16TB/8EB * | 16TB/8EB * | NA |
Maximum filesize (GFS2) | --- | 100TB | 100TB |
Maximum filesystem size (GFS2) | --- | 100TB | 100TB |
Maximum filesize (XFS) | --- | 100TB | 100TB |
Maximum filesystem size (XFS) | --- | 100TB | 100TB |
Kernel and OS features | |||
Kernel foundation | Linux 2.6.9 | Linux 2.6.18 | Linux 2.6.32-2.6.34 |
Compiler | GCC 3.4 | GCC 4.1 | GCC 4.4 |
NOTE:* If there are any 32-bit machines in the cluster, the maximum gfs file system size is 16TB. If all machines in the cluster are 64-bit, the maximum size is 8EB
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