3 ms·
its fair to assume netflix is mostly doing reads and not writes, and also fairly sequential. Thats very good for longevity of the disks
by dachryn 4y ago
its fair to assume netflix is mostly doing reads and not writes, and also fairly sequential.
Thats very good for longevity of the disks
- michaelt 4y agoTrue - but presumably they've been spinning and doing seeks pretty much 24/7. It's not like backblaze/coldline where the drives are practically powered down most of the time. And of course, 36x the drives means 36x the drive failures - and even if you avoid losing data, you've still got the chore of swapping each failed drive.
- dijit 4y agoConstantly spinning is better for the motor than starting and stopping.
- Maursault 4y ago> And of course, 36x the drives means 36x the drive failures I think you must mean 36x the chance of drive failure. Drive failure probability per year is published at around 1% though practically as high as 10%. 36 drives means there's somewhere between a 30.35% (1 - 0.99^36) and 97.7% (1 - 0.9^36) chance per year of a single drive failing.
- justsomehnguy 4y ago> and also fairly sequential ... No. When you hit hundreds of concurrent operations there is no such thing as sequential. Also there is no need for sequential reads because a stripe of 7-15 disks would give you much more than streaming bitrate needs.