topic Re: Kernel ? in Application Development and Automation Discussions

Kernel ?

Former Member — Mon, 13 Aug 2007 18:21:15 GMT

what is a KERNEL ?explain plzzzzzz ?

Re: Kernel ?

RichHeilman — Mon, 13 Aug 2007 18:23:25 GMT

Wikipedia is a great place for definitions.

http://en.wikipedia.org/wiki/Kernel_%28computer_science%29

Regards,

RIch Heilman

Message was edited by:

Rich Heilman

Re: Kernel ?

Former Member — Mon, 13 Aug 2007 18:27:09 GMT

The Kernel is the core of a system, usually written in a very low-level language or even machine code.

The term kernel is frequently used to describe the core of an operating system, such as Unix or Linux, or other complex software, such as SAP.

In fact, SAP has a kernel, which is the underlying basis of the SAP system. The DB that underlies SAP may also have a kernel.

Good luck

Brian

Re: Kernel ?

Former Member — Mon, 13 Aug 2007 19:19:15 GMT

My fellow SDN-ers,

Spart Cus is asking lots of questions... but I have not seen any points rewarded for our efforts and correct answers.

I would say that he/she has worn out their welcome here.

I would not waste your time.... this user needs to attend some basic programming/IT related classes. A forum of this type is not for them.

Re: Kernel ?

Former Member — Tue, 14 Aug 2007 03:48:25 GMT

"Kernel :
'The kernel is the central program that is essential to the SAP system applications.

The threads of a database instance are often referred to as the kernel.

"Thread

A whole series of operating system threads (often referred to as kernels) belong to a database instance.

We differentiate between UKTs (user kernel threads) and special threads.

The required number of UKTs and of special threads depends on the number of devspaces, the hardware configuration, and the database parameters.

User kernel thread (UKT)

Special thread

Operating-system dependent special thread

"Database Instance

The SAP DB database can be installed and run on a computer in one mode (database instance) or several modes (database instances) (Database Instance Type, see also: SAP DB Versions and Database Instance Types).

Each database instance consists of threads, main memory structures (caches) and disk-based storage of the data on devspaces.

The following disk-based devspaces are available in every database instance for the physical storage of data:

System devspace

One or more data devspaces

One or more log devspaces

Each database instance differentiates between the following areas for the logical storage of data:

Database catalog

User data

reward points if it is usefull ...

Girish