nl_tokens: Provides in memory storage and regular flush to disk .
pl_tokens: function Memory ( options ) { options = options || { } ; var self = this ; self . flush = options . db . _db . _memory . flush || false ; self . flushInterval = options . db . _db . _memory . flushInterval || 10000 ; self . flushFile = options . file ; self . memoryTable = [ ] ; console . log ( 'Data will be handled using \'Memory\' driver' ) ; // :S yeah we need to load it synchronously otherwise it might be loaded after the first insert var content = util . fileSystem . readSync ( self . flushFile ) ; self . set ( content ) ; if ( self . flush ) { console . log ( '\'Memory\' driver will flush data every %sms' , self . flushInterval ) ; // set interval to flush setInterval ( function flushToDisk ( ) { util . fileSystem . lock ( <mask> . flushFile , function afterLock ( err ) { if ( err ) { throw err ; } self . get ( function afterGet ( err , inMemoryContent ) { if ( err ) { util . fileSystem . unlock ( self . flushFile ) ; throw err ; } util . fileSystem . write ( self . flushFile , inMemoryContent , function afterWrite ( err ) { util . fileSystem . unlock ( self . flushFile ) ; if ( err ) { throw err ; } } ) ; } ) ; } ) ; } , self . flushInterval ) ; } }