#define SPARSE_WRITE_SIZE (1024)
#define WRITE_SIZE (32*1024)
#define CHUNK_SIZE (32*1024)
-#define MAX_MAP_SIZE (512*1024)
-#define MAX_BLOCK_SIZE (256*1024)
+#define MAX_MAP_SIZE (256*1024)
#define IO_BUFFER_SIZE (4092)
#define IOERR_GENERAL (1<<0) /* For backward compatibility, this must == 1 */