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s = new ShardingTest( "migrateMemory" , 2 , 1 , 1 , { chunksize : 1 });
s.config.settings.update( { _id: "balancer" }, { $set : { stopped: true } } , true );
s.adminCommand( { enablesharding : "test" } );
s.adminCommand( { shardcollection : "test.foo" , key : { _id : 1 } } );
db = s.getDB( "test" )
t = db.foo
str = ""
while ( str.length < 10000 ){
str += "asdasdsdasdasdasdas";
}
data = 0;
num = 0;
while ( data < ( 1024 * 1024 * 10 ) ){
t.insert( { _id : num++ , s : str } )
data += str.length
}
db.getLastError()
stats = s.chunkCounts( "foo" )
from = ""
to = ""
for ( x in stats ){
if ( stats[x] == 0 )
to = x
else
from = x
}
s.config.chunks.find().sort( { min : 1 } ).forEach( printjsononeline )
print( "from: " + from + " to: " + to )
printjson( stats )
ss = []
// Stop balancer for manual move
s.stopBalancer()
for ( var f = 0; f<num; f += ( 2 * num / t.stats().nchunks ) ){
ss.push( s.getServer( "test" ).getDB( "admin" ).serverStatus() )
print( f )
//
// Since we're moving chunks fast here, there's no guarantee that the to-shard will be done
// before the from-shard with the migration.
//
while( true ){
try {
s.adminCommand( { movechunk : "test.foo" , find : { _id : f } , to : to } )
}
catch( e ){
// Not sure if thrown as string or obj
if( tojson( e ).indexOf( "TO-shard" ) >= 0 ) continue
printjson( e )
throw e
}
break;
}
}
// Re-enable balancer
s.setBalancer( true )
for ( i=0; i<ss.length; i++ )
printjson( ss[i].mem );
s.stop()
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