Compaction debt
Difficulty 1 of 5
Each second, 10,000 writes of 1 KB create 10 bytes of disk work per source byte. The store starts with 512 MB of compaction debt. At 1,024 MB of debt, writes stall. Keep p99 below 100 ms and errors below 0.1 percent.
0:07. Compaction debt keeps growing. Graph: debt climbs toward 1,024 MB, then writes stall and errors rise.
5 MB/s · logs kept on the host · disk full in 33 minutes
Goals and limits
- p99 latency
- under 100 ms
- Error rate
- under 0.1%
- Monthly cost
- under 100 USD/mo
- Parts you can add
- Key-value store
- Part limit
- 16
- Edit limit
- 3
- Traffic
- 10,000 req/s
Concepts
How players did
Player results load from the server.