CoreQ Academy1.4 Compare and contrast storage resources and technologies.
Choosing the right storage type and tier balances performance, durability and cost. Storage is also where most cloud data exposure happens.
Tiered storage
- Hot
- Frequently accessed data on the fastest, most expensive tier.
- Warm
- Accessed occasionally; cheaper storage, slightly slower or with access fees.
- Cold
- Rarely accessed; low storage cost, higher retrieval cost or delay.
- Archive
- Long-term retention; cheapest storage, retrieval can take hours.
Disk types
- Solid-state drive (SSD)
- Flash storage with high IOPS and low latency; for databases and boot volumes.
- Hard disk drive (HDD)
- Magnetic storage; cheaper per GB, good for sequential throughput workloads like logs and backups.
Storage types
- Object storage
- Stores objects with metadata in buckets, accessed via HTTP APIs. Massively scalable; misconfigured public buckets are a classic breach cause.
- Block storage
- Raw volumes attached to a VM like a disk; low latency for databases and OS disks.
- File storage
- Shared file systems (NFS/SMB) mounted by many clients at once.
Implications
- Performance implications
- Tier, disk type, IOPS limits and throughput determine how fast applications run.
- Cost implications
- Storage price, retrieval fees, request charges and data egress add up; lifecycle policies move data to cheaper tiers automatically.
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Original CoreQ Academy material, mapped to objective 1.4 of the publicly available CompTIA Cloud+ CV0-004 exam objectives (Exam objectives V4, document version 5.0). Not affiliated with or endorsed by CompTIA. Contains no exam questions.