registrar(8)

NAME

registrar -- RSerPool Pool Registrar (PR) Service

SYNOPSIS

registrar [-announcettl=TTL] [-asap=auto|address:port,address,...]
          [-asapannounce=auto|address:port] [-autoclosetimeout=seconds]
          [-endpointkeepalivetransmissioninterval=milliseconds]
          [-endpointkeepalivetimeoutinterval=milliseconds]
          [-maxbadpereports=reports] [-maxhresitems=items]
          [-maxincrement=increment]
          [-minaddressscope=loopback|sitelocal|global]
          [-serverannouncecycle=milliseconds]
          [-enrp=auto|address:port,address,...]
          [-enrpannounce=auto|address:port]
          [-maxelementsperhtrequest=items]
          [-mentordiscoverytimeout=milliseconds] [-peer=address:port]
          [-peerheartbeatcycle=milliseconds]
          [-peermaxtimelastheard=millisecond]
          [-peermaxtimenoresponse=milliseconds]
          [-takeoverexpiryinterval=milliseconds]
          [-cspinterval=milliseconds] [-cspserver=address:port]
          [-logcolor=on|off] [-logappend=filename] [-logfile=filename]
          [-loglevel=0-9]

DESCRIPTION

registrar provides a registrar service for Reliable Server Pooling (RSerPool) pool elements (PEs) and pool users (PUs). PRs of an operation scope synchronize their view of the handlespace using the Endpoint haNdlespace Redundancy Protocol (ENRP), transported via SCTP. An operation scope has a limited range, e.g. an organization or only a building. In particular, it is restricted to a single administrative domain - in contrast to GRID computing - in order to keep the management complexity at a minimum. Nevertheless, PEs may be distributed globally for their service to survive
localized disasters.

PEs choose an arbitrary PR of the operation scope to register into a pool by using the Aggregate Server Access Protocol (ASAP), again transported
via SCTP. Upon registration at a PR, the chosen PR becomes the Home-PR
(PR-H) of the newly registered PE. A PR-H is responsible for monitoring
its PEs' availability by keep-alive messages (to be acknowledged by the
PE within a given timeout) and propagates the information about its PEs
to the other PRs of the operation scope via ENRP updates.

In order to access the service of a pool given by its PH, a PU requests a PE selection from an arbitrary PR of the operation scope, using the
Aggregate Server Access Protocol (ASAP), transported via SCTP. The PR
selects the requested list of PE identities by applying a pool-specific
selection rule, called pool policy.

In order to allow for automatic configuration, a PR can send out regular announces via an ASAP and ENRP multicast address. PEs and PUs can listen to this address to learn the list of currently available PRs.

ARGUMENTS

The following options are available:

-quiet Do not print startup and shutdown messages.

-announcettl=TTL: Sets the TTL for outgoing ASAP Announce/ENRP Presence messages
via multicast.
Logging Parameters:: It is recommended to use at least a value of 2 to see possibly
important error messages and warnings.; -logcolor=on|off
Turns ANSI colorization of the logging output on or off.
-logappend=filename: Write logging output to a file (default is stdout); output will be appended to given file.
-logfile=filename: Write logging output to a file (default is stdout); given file will be overwritten.
-loglevel=0-9: Sets the logging verbosity from 0 (none) to 9 (very verbose).
Component Status Protocol (CSP) Parameters:: -cspinterval=milliseconds
Sets the interval for the CSP status updates in milliseconds.
-cspserver=address:port: Sets the CSP monitor server's address and port.
Aggregate Server Access Protocol (ASAP) Parameters:: -autoclosetimeout=seconds
Sets the SCTP autoclose timeout for idle ASAP associations.
-asap=auto|address:port,address,...: Sets the ASAP endpoint address(es). Use "auto" to automatically set it (default).
-asapannounce=auto|address:port: Sets the multicast address and UDP port to send the ASAP Announces to. Use "auto" to automatically set it
(default). Examples:
-asapannounce=auto
-asapannounce=239.0.0.1:3863
-endpointkeepalivetransmissioninterval=milliseconds: Sets the ASAP Endpoint Keep Alive interval.
-endpointkeepalivetimeoutinterval=milliseconds: Sets the ASAP Endpoint Keep Alive timeout.
-maxbadpereports=reports: Sets the maximum number of ASAP Endpoint Unreachable
reports before removing a PE.
-maxincrement=increment: Sets the MaxIncrement constant. Handle with care!
-maxhresitems=items: Sets the MaxHResItems constant.
-minaddressscope=loopback|sitelocal|global: Sets the minimum address scope acceptable for registered PEs:
loopback: Loopback address (only valid on the same node!) site-local: Site-local addresses (e.g. 192.168.1.1, etc.) global: Global addresses
-serverannouncecycle=milliseconds: Sets the ASAP Announce interval.
Endpoint Handlespace Redundancy Protocol (ENRP) Parameters:: -enrp=auto|address:port,address,...
Sets the ENRP endpoint address(es). Use "auto" to automatically set it (default). Examples:
-enrp=auto
-enrp=1.2.3.4:9901
-enrp=1.2.3.4:9901,[2000::1:2:3],9.8.7.6
-enrpannounce=auto|address:port: Sets the multicast address and UDP port to send the ENRP Announces to. Use "auto" to automatically set it
(default). Examples:
-enrpannounce=auto
-enrpannounce=239.0.0.1:9901
-maxelementsperhtrequest=items: Sets the maximum number of items per ENRP Handle Table
Response.
-mentordiscoverytimeout=milliseconds: Sets the mentor PR discovery timeout in milliseconds.
-peer=address:port: Adds a static PR entry into the Peer List. It is possible to add multiple entries.
-peerheartbeatcycle=milliseconds: Sets the ENRP peer heartbeat interval.
-peermaxtimelastheard=milliseconds: Sets the ENRP peer max time last heard.
-peermaxtimenoresponse=milliseconds: Sets the ENRP maximum time without response.
-takeoverexpiryinterval=milliseconds: Sets the ENRP takeover timeout.

ENVIRONMENT

registrar uses the environment variables CSP_SERVER and CSP_INTERVAL to define a CSP server to send reports to in the specified interval.

DIAGNOSTICS

If loglevel>0, log messages will be printed to stdout or into a specified log file.

AUTHORS

Dr. Thomas Dreibholz
http://tdrwww.iem.uni-due.de/dreibholz/rserpool/
mailto://dreibh@iem.uni-due.de

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