(Illustration by Gaich Muramatsu)
Hi Simone, celli_at_students.cs.unibo.it said: | These are my question : | - how can I do to know if the two server are communicating ? I tried | to copy 1,5Gb on data in /coda, but after a 1Gb the copy fail, so I | have this doubt : | | - if I have two server with each 1Gb, I have a total of 2Gb, or the | second server take a copy of scm data ? This all depends on how you have created your volumes. A volume can bre replicated over multiple servers, or on a single server. f.i. If the volume storage group database looks like this: /vice/db/VSGDB: E00000100 scm-server E00000101 other-server E00000102 scm-server other-server Then a volume on only `scm-server' can be created using: createvol_rep new_volume E00000100 /vicepa A volume on both `scm-server' and `other-server' can be created using: createvol_rep new_volume E00000102 /vicepa The new volume can be mounted anywhere in /coda using: cfs mkm somedir new_volume When volumes are replicated across multiple servers, every server will have an identical copy of the volume-data. So with `single replicated' volumes you would get 2 GB, with `doubly replicated' volumes there will be 1 GB available, but then you can lose either server and still have full access to the data. | Last question : when I setup venus with venus-setup, in the list of | servers I must list only scm servers, right ? But what does this mean | ? What is the mean to use two scm server ? If I have a scm server on | my machine, said simo.ddns.org, what appen if I do venus-setup | simo.ddns.org,testserver.coda.cmu.cs.edu 20000 ? You do not have to list only the scm-server, every server knows about the locations of all volumes within the same administrative domain. So you can list any servers. However, when you specify servers in different administrative domains, they will not know about which volumes the `other group' has. So you'll only see the volumes and files associated with the server you happened to connect to first. Which might be a different one everytime you restart venus, and this can easily lead to very confusing things in the client. JanReceived on 1999-03-29 10:56:57