has 28 ratings and 2 reviews. Take an in-depth look at the internals of the SQL Server Storage Engine—with advice from a. Kalen Delaney. The Storage Engine by Kalen Delaney, , available at Book Depository with free delivery worldwide. Inside Microsoft (r) SQL Server (tm) The Storage Engine. Author: Kalen Delaney View colleagues of Kalen Delaney.


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Collapse the table of content Expand the table of content This documentation is archived and is not being maintained. This documentation is archived and is not being maintained. There are other kalen delaney storage engine of information available that discuss other aspects of SQL Server.

This article fills in some of that gap. Hopefully, the information presented here will teach you some things that will allow you to write better applications. You'll be able to look at performance problems in a new light, with a new understanding. But what does that mean?

It means more than just kalen delaney storage engine SQL Server is two-tier system.

Inside Microsoft® SQL Server™ , Fourth Edition [Book]

Traditionally, a two-tier system means that the client application runs on one machine and sends requests to a server located on another machine. In kalen delaney storage engine classic two-tier model, the client portion sits on the desktop machine, with kalen delaney storage engine amounts of client application logic and business logic, and generates requests directly to the database system.

The client then gets data back from the server in response to its requests. The same model applies in the three-tier world.

From the SQL Server perspective, the client in a three-tier solution is a piece of logic sitting in the middle tier.

Inside SQL Server 2005: The Storage Engine

That middle tier interacts directly with the database system. The actual desktop, or thin client, uses some other mechanism and typically interacts directly with the middle tier, not directly kalen delaney storage engine the database system.

This structure is illustrated in Figure 1. Three-tier system model Client Architecture From an architectural standpoint, the SQL Server Relational Server component doesn't really concern itself with where a client is running.


The server runs kalen delaney storage engine separate multithreaded process, and it services requests coming from clients, no matter where those clients are located.

TDS encapsulates the SQL statements sent from the client to the server, as well as the result sets sent from the server back to the client.

Let's kalen delaney storage engine at the components of the client, as shown in Figure 2. There are pieces of client architecture we won't discuss because they are outside the boundaries of SQL Server itself. But if you are writing an application, you are quite aware of those pieces.

So this object model, which is the most commonly used part of the programming model, is not strictly part of SQL Server's client architecture.

In addition, there are additional components that can plug in at this level above the SQL Server infrastructure. There are three components to any of these client APIs, as you can see in Figure 2, above. The top piece implements the API specifics, such as what a rowset looks like, what cursors look like, and so forth.

There is also some common library code used by all the providers. DTC is another example. We won't go kalen delaney storage engine details on the workings of the Net-Libraries; suffice it to say that their job is basically to hide the low-level details of the network communications from the rest of software.

TDS is a simple protocol. When SQL Server receives a message, it can be thought of as an kalen delaney storage engine occurring.