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Databases and Systems

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Figure 8. The results of a query for databanks named ‘ENZYME’.<br />

227<br />

Each entry in DATABANKS contains a copy of the remote SRS databank<br />

information page, which includes field descriptions <strong>and</strong> data about the indices, <strong>and</strong> it<br />

concludes with an overview of alternate sites. Parts of a typical entry are shown in<br />

figure 9. The overview provides direct links for remote queries to each of the sites.<br />

For users in the network vicinity of a particular DATABANKS server, the relative<br />

response times compiled by that server give a clue of the net distances to other sites.<br />

If problems are encountered with the connection to a particular site, it is moved to the<br />

end of the list of alternatives. In this case, data from previous runs is used as backup.<br />

A record of when the backup was originally retrieved indicates whether it might be<br />

out of date.

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