Changes between Initial Version and Version 1 of Moira


Ignore:
Timestamp:
02/23/12 11:18:45 (9 years ago)
Author:
jdreed
Comment:

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  • Moira

    v1 v1  
     1Moira is a database and primary information repository for: 
     2 
     3        * Workstation cluster information 
     4        * Locker filsys entries, quotas, and server locations 
     5        * Lists, which compasses mailing lists and filesystem access 
     6          groups 
     7        * Host and network configuration 
     8        * Kerberized NFS server configuration 
     9        * Printer configurations 
     10        * User information 
     11        * Zephyr ACLs 
     12        * "Generic ACLs" which can be used by any service which can 
     13          be made to understand the ACL file format 
     14 
     15and probably a few other things. 
     16 
     17Production systems never (at least, ideally) retrieve information from 
     18moira as part of regular operation; instead, a periodic process called 
     19a DCM (Data Control Manager) pushes out new versions of information 
     20from the Moira database to the affected servers.  For instance, the 
     21Hesiod DNS servers are periodically updated with a new zone file 
     22containing new cluster, filsys, printer, and user information. 
     23Currently, the DCM runs several times a day.  A few kinds of changes 
     24to the Moira database are propagated immediately to the affected 
     25servers via incremental update; an example is changes to AFS groups 
     26resulting from changes to Moira list membership. 
     27 
     28The Moira server is implemented as an Oracle database with a 
     29surrounding layer of C code.  The Moira clients for Unix live in the 
     30moira locker (the Athena release contains scripts which attach the 
     31moira locker and run the actual programs), and use Kerberos 4 to 
     32authenticate to the Moira server.