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// Tests whether the noBalance flag disables balancing for collections
var st = new ShardingTest({ shards : 2, mongos : 1, verbose : 1 })
// Initially stop balancing
st.stopBalancer()
var shardAName = st._shardNames[0]
var shardBName = st._shardNames[1]
var collA = st.s.getCollection( jsTest.name() + ".collA" )
var collB = st.s.getCollection( jsTest.name() + ".collB" )
// Shard two collections
st.shardColl( collA, { _id : 1 }, false )
st.shardColl( collB, { _id : 1 }, false )
// Split into a lot of chunks so balancing can occur
for( var i = 0; i < 10 - 1; i++ ){ // 10 chunks total
collA.getMongo().getDB("admin").runCommand({ split : collA + "", middle : { _id : i } })
collA.getMongo().getDB("admin").runCommand({ split : collB + "", middle : { _id : i } })
}
// Disable balancing on one collection
sh.disableBalancing( collB )
jsTest.log( "Balancing disabled on " + collB )
printjson( collA.getDB().getSisterDB( "config" ).collections.find().toArray() )
st.startBalancer()
// Make sure collA gets balanced
assert.soon( function(){
var shardAChunks = st.s.getDB( "config" ).chunks.find({ _id : sh._collRE( collA ), shard : shardAName }).itcount()
var shardBChunks = st.s.getDB( "config" ).chunks.find({ _id : sh._collRE( collA ), shard : shardBName }).itcount()
printjson({ shardA : shardAChunks, shardB : shardBChunks })
return shardAChunks == shardBChunks
}, "" + collA + " chunks not balanced!", 5 * 60 * 1000 )
jsTest.log( "Chunks for " + collA + " are balanced." )
// Check that the collB chunks were not moved
var shardAChunks = st.s.getDB( "config" ).chunks.find({ _id : sh._collRE( collB ), shard : shardAName }).itcount()
var shardBChunks = st.s.getDB( "config" ).chunks.find({ _id : sh._collRE( collB ), shard : shardBName }).itcount()
printjson({ shardA : shardAChunks, shardB : shardBChunks })
assert( shardAChunks == 0 || shardBChunks == 0 )
// Re-enable balancing for collB
sh.enableBalancing( collB )
// Make sure that collB is now balanced
assert.soon( function(){
var shardAChunks = st.s.getDB( "config" ).chunks.find({ _id : sh._collRE( collB ), shard : shardAName }).itcount()
var shardBChunks = st.s.getDB( "config" ).chunks.find({ _id : sh._collRE( collB ), shard : shardBName }).itcount()
printjson({ shardA : shardAChunks, shardB : shardBChunks })
return shardAChunks == shardBChunks
}, "" + collB + " chunks not balanced!", 5 * 60 * 1000 )
jsTest.log( "Chunks for " + collB + " are balanced." )
// Re-disable balancing for collB
sh.disableBalancing( collB )
// Wait for the balancer to fully finish the last migration and write the changelog
// MUST set db var here, ugly but necessary
db = st.s0.getDB("config")
sh.waitForBalancer(true)
// Make sure auto-migrates on insert don't move chunks
var lastMigration = sh._lastMigration( collB )
for( var i = 0; i < 1000000; i++ ){
collB.insert({ _id : i, hello : "world" })
}
printjson( lastMigration )
printjson( sh._lastMigration( collB ) )
if( lastMigration == null ) assert.eq( null, sh._lastMigration( collB ) )
else assert.eq( lastMigration.time, sh._lastMigration( collB ).time )
st.stop()
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