Created: 2023-06-10T20:00:31-05:00
This card pertains to a resource available on the internet.
Cold data: data which is rarely read.
Creating a model of a rack and disk i/o to design policies against. Model was verified on the real hardware after design.
Only 8% of disks in a Pelcian rack are allowed to spin at a given moment.
52U rack mounted blob of server, with 1,152 archival drives mounted.
Blocks in a range of 200mb to 1tb are stored.
20 byte identifiers are used to store blocks.
A key-value store tracks where a block is stored given the identifier.
Separates power and cooling domains and restricts which drives can be active at a time based around this.