Data Migration
Data migration is much like it sounds, it
is the migration, or movement of data between
storage types, formats, or even the transferring
of data between computer systems. Data
migration is often and programmed or done on
an automated basis, so much so that most people
don't even give much thought to data migration. Data
migration is often automated because it is
something that a person does not have to worry
about, instead man hours can be used for things
that take more effort than data migration.
More on Data Migration
Data migration is used a lot of the time by
a lot of different people and corporations,
but data migration is often necessary when
individuals or companies change computer systems,
upgrade to newer systems, or even when businesses
or computer systems merge. Data migration
is often a huge undertaking when there are
corporate mergers or acquisitions.
Data migration isn't done without any thought,
at least not the first time. The way
that data migration is done is that all of
the information on the old system is looked
at before any data migration takes placed. The
old data is then mapped to the new system,
which provides a design for the data extraction
as well as the data loading, which are important
aspects of data migration and these are not
steps that can be overlooked when it comes
to data migration.
The design that is created creates links between
the old data or format and the new data or
format. Even when data migration is done
automatically or by some sort of program, data
mapping will always include the data extraction
and data loading. After the data migration
is completed where the information has actually
been moved, all of the data is put through
a data verification process. The data
verification process is important to data migration
because this is what ensures that all of the
data was translated correctly, is complete,
and will be supported on the new system. During
the process of data migration a lot of the
data is cleaned to do away with redundant information
to make the new system run as efficiently as
possible.
Each phase of data migration may be repeated
several times before the data migration process
is truly complete and the new system is ready. While
this is a good practice, users of data migration
should be aware that there are some disadvantages
to data migration in the opinion of many. Some
of the concerns or disadvantages of data migration
include things such as the limited use of migration
between different systems because of different
technologies, the fact that data migration is
so time consuming, and also a huge disadvantage
is that data migration is very costly. There
are disadvantages to data migration, such as
those listed above, yet many are still using
data migration. Others have turned away
from data migration and have begun to look at
emulation instead of data migration, which does
have some promise for those that are not big
on data migration and all that data migration
can do for them. While data migration
does have its limits, data migration is still
very popular today. |
|
