jstests/core/removea.js


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// Test removal of a substantial proportion of inserted documents.  SERVER-3803
// A complete test will only be performed against a DEBUG build.

t = db.jstests_removea;

Random.setRandomSeed();

for( v = 0; v < 2; ++v ) { // Try each index version.
    t.drop();
    t.ensureIndex( { a:1 }, { v:v } );
    S = 100;
    B = 100;
    for ( var x = 0; x < S; x++ ) {
        var batch = [];
        for ( var y = 0; y < B; y++ ) {
            var i = y + ( B * x );
            batch.push( { a : i } );
        }
        t.insert( batch );
    }
    assert.eq( t.count(), S * B );

    toDrop = [];
    for( i = 0; i < S * B ; ++i ) {
        toDrop.push( Random.randInt( 10000 ) ); // Dups in the query will be ignored.
    }
    // Remove many of the documents; $atomic prevents use of a ClientCursor, which would invoke a
    // different bucket deallocation procedure than the one to be tested (see SERVER-4575).
    var res = t.remove( { a:{ $in:toDrop }, $atomic:true } );
    assert.writeOK( res );
}