> -Database Connection Pooling
Database connection pooling simply means that
ColdFusion can be set up so that a database connection
is opened once and re-used many times. The
alternative is that database connections are opened
and closed every time a query is executed in a
ColdFusion page. With connection pooling, ColdFusion
will open a database connection if the connection has
not been opened yet and then keep the connection open
to be re-used with many queries. The connection will
stay open as long as it is being used. ColdFusion
will then close the connection if it has not been used
for a while. The advantage to connection pooling is
performance. There is some overhead in connecting to
a database. That overhead is reduced by connection
pooling because the database connection is only open
once and re-used many times, vs. being opened and
closed with every query.
> -Automatic Server Fail Over
Automatic Server Fail Over only applies when using
clustering. A cluster is a group of servers that
provide the same service. So several ColdFusion
servers can be set up with the same application/s so
that if one server crashes, then the other servers in
the cluster can take over. As far as I know, this is
only available in the Enterprise edition of ColdFusion
Server.
> -Server Sandbox Security
This is referring to ColdFusion Advanced Security.
This allows the implementation of security within the
development environment and the web applications at a
much lower level. An example would be, a web page can
be secured by securing the directory in which the page
is stored. This can be done without "server sandbox
security". But what server sandbox security can do is
restrict access to links on a page and so one.
> -Dynamic Load Balancing
Load balancing is used in a clustered environment.
Again this involves two or more servers that serve the
same application/s. What load balancing does is
provide better performance by evenly distributing the
load across all servers in the cluster. This helps
performance because when a server is overloaded with
more work than it can handle, then the performance of
that overloaded server degrades.
To simplify, there are three basic ways load
balancing can be implemented: 1. a load balancing
software only 2. load balancing hardware device only
or 3. a combination of hardware and software.
ColdFusion ENTERPRISE edition comes with load
balancing software.
> -Standards-based integration with directory, mail,
> HTTP, FTP, and file servers
This feature claims that Allaire stuck to the
standards when creating the ColdFusion functions and
tags that interact with mail, file, HTTP, and FTP
servers.
> -Multi-threaded
ColdFusion server itself is multi-threaded. "How?",
you may ask. When ColdFusion server service first
starts up, it will spawn a set number of threads to
handle requests. This means that ColdFusion server
processes many requests simultaneously.
Did that help?
--- "Haryono ..." <[EMAIL PROTECTED]> wrote:
> Feature of ColdFusion:
> -Database Connection Pooling
> -Automatic Server Fail Over
> -Server Sandbox Security
> -Dynamic Load Balancing
> -Standards-based integration with directory, mail,
> HTTP, FTP, and file servers
> -Multi-threaded
> I don't understand about that. Can someone help me
> to
> tell me(explain me) with that features.
> I want to know the meaning of that features.
>
> Thank you!!
>
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