4 ms·
The bottleneck in HDD in this scenario is bandwidth. What you do is split & spread files as much as possible, so your HDD are all serving the same amount of ban
by ddorian43 6y ago
The bottleneck in HDD in this scenario is bandwidth. What you do is split & spread files as much as possible, so your HDD are all serving the same amount of bandwidth. A disk doing nothing is wasted potential bandwidth (unless it's turned off).
- cm2187 6y agoBut do they actively move around files to spread bandwidth after the initial write? If they don't, and if I am right that older files tend to be rarely accessed, I would expect entire disks to become unaccessed over time.
- jeffbee 6y agoIf they allow that to happen, they are leaving a ton of money on the table. It's typical in the industry to move hot and cold files around to take advantage of the IOPS you already paid for. See, for example, pages 22-23 of http://www.pdsw.org/pdsw-discs17/slides/PDSW-DISCS-Google-Keynote.pdf http://www.pdsw.org/pdsw-discs17/slides/PDSW-DISCS-Google-Ke...