Difference between revisions of "Different kernel flavors (UP, SMP, ENTERPRISE, ENTNOSPLIT)"

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The version of a kernel you need depends on your server hardware.
 
The version of a kernel you need depends on your server hardware.
 +
 
The table below describes the cases when it is better to use each of these kernels:
 
The table below describes the cases when it is better to use each of these kernels:
  
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| >20-30 VPSs
 
| >20-30 VPSs
 
|}
 
|}
 +
  
 
These kernels are optimized for these types of hardware configurations and usage scenarios,
 
These kernels are optimized for these types of hardware configurations and usage scenarios,
so choosing the right kernel can improve (or descrease) a performance for 5-15%.
+
so choosing the right kernel can help performance for 5-15%.
  
 
Use 'rpm -ihv' command for ovzkernel RPM installation. Please do not use the "rpm -Uhv" command to install the kernel,
 
Use 'rpm -ihv' command for ovzkernel RPM installation. Please do not use the "rpm -Uhv" command to install the kernel,
 
otherwise all the previously installed kernels may be removed from your system.
 
otherwise all the previously installed kernels may be removed from your system.

Revision as of 11:10, 1 June 2006

The version of a kernel you need depends on your server hardware.

The table below describes the cases when it is better to use each of these kernels:

Kernel flavors list
Kernel type Hardware Use case
UP (uniprocessor) up to 4GB of RAM -
SMP (symmetric multiprocessor) up to 4 GB of RAM 10-20 VPSs
entnosplit (SMP + PAE support) up to 64 GB of RAM 10-30 VPSs
enterprise (SMP + PAE support + 4/4GB split) up to 64 GB of RAM >20-30 VPSs


These kernels are optimized for these types of hardware configurations and usage scenarios, so choosing the right kernel can help performance for 5-15%.

Use 'rpm -ihv' command for ovzkernel RPM installation. Please do not use the "rpm -Uhv" command to install the kernel, otherwise all the previously installed kernels may be removed from your system.