OSF DCE Administration Guide--Core Components

OSF DCE Administration Guide—Core Components
Figure 23-6. Relative Time Format
DD − hh:mm:ss.fffIss.fff
designator
Inaccuracy
Relative date and time
component
Inaccuracy
component
seconds
fractions
Days
hours
minutes
seconds
fractions
[−]
The simple relative times that you specify with DTS-related dcecp commands do not use
the calendar date nor inaccuracy fields because these fields are associated with absolute
times. Positive relative times are not signed, but negative relative times are preceded
with a - (minus sign).
The following example shows a relative time used in a typical DTS-related dcecp
command:
21-08:30:25.000
Simple relative times are often subtracted from or added to other relative or absolute
times. For example, if you say, ‘‘I will meet you in an hour,’’ you add a relative time of
+01:00 to the present absolute time. In the case where you add or subtract a relative time
and an absolute time, note that the inaccuracy of the input absolute time is carried over to
the resulting absolute time. For example, 1993-11-30-00:30:25.000I00.030 minus 00-
00:15:25.000 equals 1993-11-30-00:15:00.000I00.030.
23.3 How DTS Works
DTS has two major software components:
• Clerks
• Servers
The following subsections describe each of these components and tell you how they
interact to provide time to client applications and to synchronize system clocks.
23.3.1 Clerks
Any system that is not a DTS server is a DTS clerk. Most network systems run clerk
software. Clerks maintain server lists and perform the synchronization functions for
DTS client systems.
23 − 12 Tandem Computers Incorporated 124243