Data synchronization

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Data comparison in the narrow sense is the comparison of electronic data only to identify the differences. In a broader sense, this includes the alignment of the databases with one another. Thereafter, each of the storage media will contain the same updated data. Important information about such a comparison can be found under replication .

example

A well-known example is the comparison of address data and appointments between a handheld computer (or PDA ) and a (main) computer . The comparison (more precisely the alignment or synchronization ) usually takes place via a fixed (i.e. wired) connection (such as USB ) or wirelessly (for example via infrared , Bluetooth , WLAN , etc.). In order for such a data comparison between two devices to be possible at all, both must agree on a defined protocol , i. That is, the type and format of the data must be known to both of them. In practice, a so-called replication program is also used for this - but (auxiliary) applications are also possible with the help of which data can also be mirrored (such as robocopy ).

application

Data synchronization is used in industry to increase the availability and data integrity of a system. Examples of this would be data mirroring between databases in order to maintain operation in the event of a failure of one or more servers, or transferring the data every few hours, where the technical effort is less. In the second case, the log files, which are constantly being copied, and the last copied data status on the main computer can be used to restore the most recent status after a restart after a restart. However, it is no longer possible to switch to another computer immediately.

Legal

The comparison of personal data within the framework of social legislation is regulated in § 52 SGB ​​II .

The data comparison is also used in the raster search .

In compliance screening , data is compared with a sanctions list.

See also

Wiktionary: data comparison  - explanations of meanings, word origins, synonyms, translations

supporting documents

... and comments:

1. ↑ data comparison - Duden , 2020; there with reference to "the comparison 2b " and also "comparison of electronic data" and compare in the corresponding entry , meaning 2b "compare in order to identify discrepancies or matches"