全部博文（327）
分类： LINUX
2009-10-29 22:11:03
| S.L. 3.0.8 | S.L. 4.4 | |
|---|---|---|
| Architecture support | ||
| Supports x86 systems | Yes | Yes |
| Supports AMD64/EM64T systems | Yes | Yes |
| Technology limits | ||
| Maximum logical CPUs (1) | ||
| x86 | 16 | 32(2) |
| AMD64/EM64T | 8 | 64/64 |
| Maximum memory | ||
| x86 (3) | 64GB | 64GB |
| AMD64/EM64T | 128GB | 128GB/1TB |
| Maximum filesize | 2TB | 8TB |
| Maximum filesystem size (Ext3) | 2TB | 8TB |
| Maximum x86 per-process virtual address space | Approx 4GB | Approx 4GB |
| Kernel & OS features | ||
| Kernel foundation | Linux 2.4.21 | Linux 2.6.9 |
| Compiler/toolchain | GCC 3.2 | GCC 3.4 |
| Languages supported | 10 | 15 |
| Selectable I/O schedulers | No | Yes |
| Internet/Intranet Input Method support | No | Yes |
| Sys_epoll support | No | Yes |
| SELinux | No | Yes |
| Ext3 Performance Enhancements | No | Yes |
| SCTP support | No | Yes |
| Bluetooth support | No | Yes |
| GCC Buffer Bound Checking | No | Yes |
| Glibc Memory Corruption Checking | No | Yes |
| Exec Shield, PIE, NX/XD support | Yes | Yes |
| Native POSIX Threading Library | Yes | Yes |
| Hyperthreading scheduler | Yes | Yes |
| Autofs V4 | Yes | Yes |
| Logical Volume Manager | Yes - LVM1 | Yes - LVM2 |
| Reverse Map VM | Yes | Yes - enhanced |
| Auditing | Yes - LAus | Yes - audit |
| Compatibility libraries | Yes - 2.1 | Yes - 2.1 & 3 |
| Asynchronous I/O for storage devices | Yes | Yes |
| CoE compliant | Yes | Yes |
| LSB compliant | Yes - 1.3 | Yes - 1.3 |
| NFS | Yes - V3 | Yes - V3 & V4 |
Scientific Linux defines logical CPUs 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.
CPU counts over 8 for AMD64/EM64T require use of the largesmp kernel.
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.
