jstests/disk/preallocate_directoryperdb.js


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/**
 * Test for SERVER-2417 - should not preallocate a database file while we are
 * dropping its directory in directoryperdb mode.
 */

var baseDir = "jstests_disk_preallocate_directoryperdb";
var baseName = "preallocate_directoryperdb"
var baseName2 = "preallocate_directoryperdb2"
var baseName3 = "preallocate_directoryperdb3"
port = allocatePorts( 1 )[ 0 ];
dbpath = MongoRunner.dataPath + baseDir + "/";

function checkDb2DirAbsent() {
    files = listFiles( dbpath );
//    printjson( files );
    for( var f in files ) {
        var name = files[ f ].name;
        assert.eq( -1, name.indexOf( dbpath + baseName2 ), "baseName2 dir still present" );
    }    
}

var m = startMongod( "--smallfiles", "--directoryperdb", "--port", port, "--dbpath", dbpath, "--nohttpinterface", "--bind_ip", "127.0.0.1" );
db = m.getDB( baseName );
db2 = m.getDB( baseName2 );
var bulk = db[ baseName ].initializeUnorderedBulkOp();
var bulk2 = db2[ baseName2 ].initializeUnorderedBulkOp();
var big = new Array( 5000 ).toString();
for( var i = 0; i < 3000; ++i ) {
    bulk.insert({ b:big });
    bulk2.insert({ b:big });
}
assert.writeOK(bulk.execute());
assert.writeOK(bulk2.execute());

// Due to our write pattern, we expect db2's .3 file to be queued up in the file
// allocator behind db's .3 file at the time db2 is dropped.  This will
// (incorrectly) cause db2's dir to be recreated until SERVER-2417 is fixed.
db2.dropDatabase();

checkDb2DirAbsent();

db.dropDatabase();

// Try writing a new database, to ensure file allocator is still working.
db3 = m.getDB( baseName3 );
c3 = db[ baseName3 ];
assert.writeOK(c3.insert( {} ));
assert.eq( 1, c3.count() );

checkDb2DirAbsent();