OSF DCE Administration Guide--Core Components

OSF DCE Administration Guide—Core Components
• The type of the replica (master or read-only)
• The global CDS name of the clearinghouse where the replica resides
• The UUID of the clearinghouse, in hexadecimal notation
• The DNS name of the host where the clearinghouse resides
The following example shows a set of AFSDB resource records for a cell that is named
cs.tech.edu, in which two replicas of the root directory exist. Note that only the first
resource record contains the cell name; the second, third, and fourth records are assumed
to be associated with the same cell because they do not contain a cell name. The TTL
heading stands for time-to-live, which is a value, in seconds, after which the data is no
longer considered valid in a DNS cache. (The value shown specifies a default value of 1
week.) The IN class indicates that the protocol is Internet, and the subtype of 2 indicates
that a name server exists on the host named in the record.
;First Replica:
;Name TTL Class Type Subtype Host
cs.tech.edu 604800 IN AFSDB 2 fox.cs.tech.edu
;Name TTL Class Type Rdata
604800 IN TXT (1 ;version
fd3328c4-2a4b-11ca-af85-09002b1c89bb ;ns uuid
Master ;Replica1 type
/.../cs.tech.edu/cs1_ch ;ch name
fd3328c5-2a4b-11ca-af85-09002b1c89bb ;ch uuid
fox.cs.tech.edu) ;host
;Second Replica:
604800 IN AFSDB 2 rox.cs.tech.edu
604800 IN TXT (1 ;version
fd3328c4-2a4b-11ca-af85-09002b1c89bb ;ns uuid
Read-only ;Replica2 type
/.../cs.tech.edu/cs2_ch ;ch name
fd3429c4-2a4b-11ca-af87-09002b1c89bb ;ch uuid
rox.cs.tech.edu) ;host
You can use MX as an alternative to using AFSDB. The following example shows a set
of MX resource records for the same cell, cs.tech.edu, in which two replicas of the root
directory exist.
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