Table 2 Summary of the white-box metric types supported in the SCOPE middleware for different cloud storage technologies (including both NoSQL and relational database technologies)
From: SCOPE: self-adaptive and policy-based data management middleware for federated clouds
| Â | NoSQL Databases | RDBMS | ||
|---|---|---|---|---|
Metric type | Cassandra | MongoDB | Redis | PostgreSQL |
Read latency | \(\boxtimes \) | \(\boxtimes \) | \(\boxtimes \) | Â |
Write latency | \(\boxtimes \) | \(\boxtimes \) | \(\boxtimes \) | Â |
Uptime | \(\boxtimes \) | \(\boxtimes \) | \(\boxtimes \) | \(\boxtimes \) |
Average object size | \(\boxtimes \) | \(\boxtimes \) | \(\boxtimes \) | \(\boxtimes \) |
Total object size | \(\boxtimes \) | \(\boxtimes \) | \(\boxtimes \) | \(\boxtimes \) |
Connected clients | Â | \(\boxtimes \) | \(\boxtimes \) | \(\boxtimes \) |
Total connections | Â | \(\boxtimes \) | \(\boxtimes \) | \(\boxtimes \) |
Keycache capacity | \(\boxtimes \) | Â | Â | Â |
Keycache hitrate | \(\boxtimes \) | Â | Â | Â |
Keycache size | \(\boxtimes \) | Â | Â | Â |
Memory allocated | \(\boxtimes \) | \(\boxtimes \) | \(\boxtimes \) | Â |
Memory used | \(\boxtimes \) | \(\boxtimes \) | \(\boxtimes \) | Â |
Rowcache capacity | \(\boxtimes \) | Â | Â | Â |
Rowcache hitrate | \(\boxtimes \) | Â | Â | Â |
Rowcache size | \(\boxtimes \) | Â | Â | Â |
Read request count | \(\boxtimes \) | \(\boxtimes \) | \(\boxtimes \) | Â |
Write request count | \(\boxtimes \) | \(\boxtimes \) | \(\boxtimes \) | Â |
Total object count | \(\boxtimes \) | \(\boxtimes \) | \(\boxtimes \) | \(\boxtimes \) |