perfsonar development work

[Nicolas Simar <>]

Hi,

for the deployment of the MDM service on GEANT, the DANTE operation team 
mentioned that they would wish to have the services backup-ed on a 
second server.

How can this be done? (a) for the next three months, (b) for the next 
release?

1) SSH telnet MP - two deployments each contacting the routers. No 
issues foreseen.

2) RRD MA - two deployments, how do they access the data? The original 
DB might be on another server, how do you synchronize those? Do you 
foresee another way of doing this?
Obviously if the server where the original data are is down, we can't do 
anything except if there are two instance capturing the data.

3) L2 status MP - two deployments, each accessing the XML file stored 
locally for one server, in another place for the other.
Obviously if the server where the original data are is down, we can't do 
anything except if there are two instance capturing the data.

4) SQL MA - two deployments. What do you suggest to do with the DB? 
Stored where? Any suggestions.

5) LS - how two instance of the LS could have the same information? (can 
the services register to two LSes at the same time)

6) How would the LS advertise the fact that there are two web-services 
offering the same information?

7) How does the visualisation tools react to have two services offering 
the same information? How would they react when one goes down?

Thanks a lot in advance

Cheers,
--
Nicolas
______________________________________________________________________

Nicolas Simar
Network Engineer

DANTE - www.dante.net

Tel - BE: +32 (0) 4 366 93 49
Tel - UK: +44 (0)1223 371 300
Mobile: +44 (0) 7740 176 883

City House, 126-130 Hills Road
Cambridge CB2 1PQ
UK
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