Universal Database System UDS/SQL General information
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●Central data protection measures
UDS/SQL incorporates effective, flexibly usable protective mechanisms to ensure that
each user group can access only precisely defi ned parts and sections of the database.
UDS/SQL checks the user’s access rights before requests to the database are actually
executed.
●Simultaneous data access by many users
UDS/SQL permits application-independent data to be acc essed by large numbers of
users simultaneously. Their requests are “time interleaved” for processing to optimize
overall throughput.
UDS/SQL also contains functions that prevent users from hindering each o ther when
they contend for access to the same record.
●Central security concept
The security concept of UDS/SQL includes precautions to p rotect the data resources
against destruction or loss. Data resources which have been destroyed can be restored
to the most recent consistent status.
●Support for mirrored disks
UDS/SQL supports DRV (Dual Recording by Volume). When DRV is used, the
operating system writes data to two disks simultaneo usly. This ensures increased avail-
ability and reliability since, even if one of the disks fails, all the data is still cons istent,
up-to-date and available to the applications.
●Support for the BS2000 access method FASTPAM
UDS/SQL supports the BS2000 access method FASTPAM, which provides a highly
efficient means of accessing files and realms of the databas e.
●Support for uninterrupted time conversions
Support for uninterrupted time conversions ensures the continuous and uninterrupted
operation of UDS/SQL during seasonal conversions of the local time, e.g. when
converting from Central European Daylight Saving Time (MESZ) to Central Europe an
Time (MEZ).