 Product Datasheet eXtreme DB Kernel Mode Edit ion “The kernel is no place for 'self-expressive fancy.' ”

Kernel -mode main memory storage solution for -- Andrew Morton, performance-critical applications Open Source Development Labs

Overview eXtreme DB-KM achieves this by providing direct The essential part of any is the operating access to kernel data . The eXtreme DB-KM run-time system “kernel”. The kernel is responsible for resource maps its directly into the driver or kernel allocation, scheduling, low-level hardware interfaces, module address space, providing direct pointers to the networking, security etc. data and eliminating expensive buffer management.

The Challenge The eXtreme DB run-time code is directly linked with

the module, so remote procedure calls are eliminated Increasingly, system software vendors try to put more from the execution path. As a consequence, the application functionality into the operating system kernel. execution path generally requires just a few CPU Running parts of the application in the kernel adds to the entire instructions. Concurrent access is coordinated by the system’s performance tremendously. At the same time, many run-time. The databases are also made modern application architectures require sophisticated data available to user-mode applications via a set of public management functions such as concurrent data access, interfaces implemented via system calls. transaction control and complex searches. Putting the data management portion of the system into the kernel makes those functions faster and more robust.

For example, firewalls and other types of computer security User Program software (access control applications, etc) must run their policy engines as kernel components, to achieve needed performance. Database API Their data structures are inherently complex, and lookups and updates must be blazingly fast. User mode

Such data management is typically the job of database Kernel mode management systems (DBMS). Until recently, it was not e treme possible to put a DBMS into the kernel – too much overhead eXtreme DB X DB introduced by available database engines would retard kernel ”proxy” Database performance, so developers had to “reinvent the wheel” of database capabilities, in limited fashion, for kernel tasks.

Introducing the Kernel-mode Database e treme e treme X DB X DB McObject’s eXtreme DB Kernel Mode (KM) is the first runtime runtime commercial database engine that makes its way to the kernel Network Other mode of most popular operating systems. From the start, the Driver Driver main principal behind the design of eXtreme DB has been to eliminate performance overhead while providing a predictable and reliable transaction model. Packaging Representative applications performing computer security functions performed an order of magnitude faster with eXtreme DB Kernel Mode Edition ( eXtreme DB-KM) eXtreme DB-KM than with the standard user-mode database. is distributed with complete runtime source code and includes a number of user-mode samples and kernel- mode modules. McObject LLC 22525 SE 64th Place Phone:+1 425 888-8505 Suite 302 Fax: +1 425 888-8508 Issaquah, WA 98027 http://www.mcobject.com

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