ONTAP Performance & Capacity — Monitoring, QoS, RAID, Efficiency & Planning
ONTAP performance work starts with knowing what to measure: latency isolation between protocol, network, and disk layers, sysstat and perfstat workflows, and QoS when noisy neighbors appear. Capacity is the same discipline — raw vs usable vs effective, RAID geometry, efficiency gains, and the 80% rule. These guides and calculators turn both into numbers you can act on.
Performance monitoring & perfstat
statistics show/start/stop, sysstat columns, perfstat, latency isolation workflow.
Capacity planning & forecasting
Raw vs usable vs effective, growth trending, acquisition forecasts.
Aggregate capacity math
Why usable < raw: RAID, WAFL overhead, snapshot reserves, worked examples.
QoS deep dive
Adaptive QoS, storage QoS policies, workload management, monitoring.
Storage efficiency
Dedupe, compression, compaction, FlexGroups: real savings math.
RAID & disk management
RAID-DP/TEC, RAID groups, spare pools, reconstruction, SyncMirror.
FlexGroup architecture
Distributed namespaces, scaling, inode space and placement.
FlexVol deep dive
Volumes, space guarantees, fractional reserve, autosize.
Network ports & throughput
Port roles, NIC sizing, jumbo frames, and throughput planning.
Storage sizing calculator
Interactive sizing from workloads, efficiency, and RAID.
Throughput calculator
Bandwidth and IOPS planning math.