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// sharding_balance4.js
// check that doing updates done during a migrate all go to the right place
s = new ShardingTest( "slow_sharding_balance4" , 2 , 1 , 1 , { chunksize : 1 } )
s.stopBalancer();
// TODO: SERVER-20194. This test forces use of the old mongos query path.
assert.commandWorked(s.s0.adminCommand({setParameter: 1, useClusterClientCursor: false}));
s.adminCommand( { enablesharding : "test" } );
s.ensurePrimaryShard('test', 'shard0001');
s.adminCommand( { shardcollection : "test.foo" , key : { _id : 1 } } );
assert.eq( 1 , s.config.chunks.count() , "setup1" );
s.config.settings.find().forEach( printjson )
db = s.getDB( "test" );
bigString = ""
while ( bigString.length < 10000 )
bigString += "asdasdasdasdadasdasdasdasdasdasdasdasda";
N = 3000
num = 0;
counts = {}
//
// TODO: Rewrite to make much clearer.
//
// The core behavior of this test is to add a bunch of documents to a sharded collection, then
// incrementally update each document and make sure the counts in the document match our update
// counts while balancing occurs (doUpdate()). Every once in a while we also check (check())
// our counts via a query.
//
// If during a chunk migration an update is missed, we trigger an assertion and fail.
//
function doUpdate( bulk, includeString, optionalId ){
var up = { $inc : { x : 1 } }
if ( includeString )
up["$set"] = { s : bigString };
var myid = optionalId == undefined ? Random.randInt( N ) : optionalId
bulk.find({ _id : myid }).upsert().update( up );
counts[myid] = ( counts[myid] ? counts[myid] : 0 ) + 1;
return myid;
}
// Initially update all documents from 1 to N, otherwise later checks can fail because no document
// previously existed
var bulk = db.foo.initializeUnorderedBulkOp();
for ( i = 0; i < N; i++ ){
doUpdate( bulk, true, i );
}
for ( i=0; i<N*9; i++ ){
doUpdate( bulk, false );
}
assert.writeOK(bulk.execute());
for ( var i=0; i<50; i++ ){
s.printChunks( "test.foo" )
if ( check( "initial:" + i , true ) )
break;
sleep( 5000 )
}
check( "initial at end" )
assert.lt( 20 , s.config.chunks.count() , "setup2" );
function check( msg , dontAssert ){
for ( var x in counts ){
var e = counts[x];
var z = db.foo.findOne( { _id : parseInt( x ) } )
if ( z && z.x == e )
continue;
if ( dontAssert ){
if ( z )
delete z.s;
print( "not asserting for key failure: " + x + " want: " + e + " got: " + tojson(z) )
return false;
}
s.s.getDB("admin").runCommand({ setParameter : 1, logLevel : 2 })
printjson( db.foo.findOne( { _id : parseInt( x ) } ) )
var y = db.foo.findOne( { _id : parseInt( x ) } )
if ( y ){
delete y.s;
}
s.printChunks( "test.foo" )
assert( z , "couldn't find : " + x + " y:" + tojson(y) + " e: " + e + " " + msg )
assert.eq( e , z.x , "count for : " + x + " y:" + tojson(y) + " " + msg )
}
return true;
}
function diff1(){
jsTest.log("Running diff1...")
bulk = db.foo.initializeUnorderedBulkOp();
var myid = doUpdate( bulk, false );
var res = assert.writeOK(bulk.execute());
assert.eq( 1, res.nModified,
"diff myid: " + myid + " 2: " + res.toString() + "\n" +
" correct count is: " + counts[myid] +
" db says count is: " + tojson(db.foo.findOne({ _id: myid })) );
var x = s.chunkCounts( "foo" )
if ( Math.random() > .999 )
printjson( x )
return Math.max( x.shard0000 , x.shard0001 ) - Math.min( x.shard0000 , x.shard0001 );
}
assert.lt( 20 , diff1() ,"initial load" );
print( diff1() )
s.startBalancer();
assert.soon( function(){
var d = diff1();
return d < 5;
} , "balance didn't happen" , 1000 * 60 * 20 , 1 );
s.stop();
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