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Are the logs of this scale and less-popular videos usually stored on SSD? I thought HDDs are still cheaper and RAID gives enough throughput given enough disks?
by owl57 7y ago
Are the logs of this scale and less-popular videos usually stored on SSD? I thought HDDs are still cheaper and RAID gives enough throughput given enough disks?
- dodobirdlord 7y agoLogs are probably on HDD, video might be on SSD given how aggressively it gets edge-cached.
- londons_explore 7y agoHDD's access time (10milliseconds or more), means a hard disk can't really serve more than 100 concurrent users, assuming each wants to stream a chunk of video every second. That makes it a poor choice for serving anything but the rarest of YouTube videos.
- owl57 7y agoI believe a typical video, stored in all of the Youtube formats, uses on the order of a megabyte per second. So, a 10TB disk probably holds about 100 days of video. Seems fine for videos that are watched less than once a day, that's probably a vast majority of Youtube's storage.