c# - Federation Fan Out Query -


i new in sql azure. facing big problem because of sql azure federation. in 1 of project want use federation. want read data federation. how can check total number of federation in server , read data federation? , how can insert data federation? using:

string strsql = @"select f.name, fmc.federation_id, fmc.member_id, fmc.range_low, fmc.range_high " +                                                             "from sys.federations f " +                                                             "join sys.federation_member_distributions fmc " +                                                             "on f.federation_id=fmc.federation_id " +                                                             "order fmc.federation_id, fmc.range_low, fmc.range_high";         string strtablename = "federation_member_distributions";          try         {             using (sqlconnection connection = new sqlconnection(csb.tostring()))             {                 connection.open();                 sbresults.appendformat("-- open {0}\r\n\r\n", csb.tostring());                  data = new dataset();                 data.locale = system.globalization.cultureinfo.invariantculture;                  using (sqlcommand command = connection.createcommand())                 {                     // connect federation root or federation member                     command.commandtext = "use federation root reset";                     command.executenonquery();                     sbresults.appendformat("{0}\r\ngo\r\n", command.commandtext);                 }                  //retrieve federation root metadata, , populate data datagridview control                 sqldataadapter sqldataadapter = new sqldataadapter(strsql, connection);                 sqldataadapter.fill(data, strtablename);                 sbresults.appendformat("{0}\r\ngo\r\n", strsql);             }          }         catch (exception ex)         {          }

but not work

for above questions need these articles talks how use sql azure federation:

introduction fan-out queries federations in sql azure (part 1): scalable queries on multiple federation members, mapreduce style!

above can find fanout sample tool has code show how data out federation(s).

the second part of sample "fan-out querying federations in sql azure (part 2): scalable fan-out queries top, order by, distinct , other powerful aggregates, mapreduce style!" show how can run fan-out queries particular examples.

try above sample , let know if met problem.


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