Since on the average, we are expecting 23 new photos per second; we can allocate 9 bits to store auto incremented sequence. So every second we can store (2^9 => 512) new photos.
why do we choose 9 bits instead of 8 or 7 bits as long as it can store more than 23 photos on average and 46 on peek time (assume it’s 46) ? Any ideas?