Which of the following statement(s) is/are true regarding Google File System (GFS)? The GFS master server keeps track of the meta data of files, e.g., the mapping from file chunks to the chunkservers The GFS client obtains the file chunks from the GFS master server directly In GFS, file will be divided into a number of chunks with a fixed size of 64MB for storage The read operation only happens between the client and the primary chunkserver The primary chunkserver is responsible for synchronizing the write operations with other backup chunkservers