IBM i on Power Systems
Server virtualization software
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What is IBM i on Power Systems
IBM i on Power Systems is an IBM operating system and integrated application platform that runs on IBM Power servers and supports logical partitioning (LPAR) and virtualization through PowerVM. It is primarily used by midmarket and enterprise IT teams running IBM i (formerly AS/400, iSeries) workloads such as ERP, core transaction processing, and database-centric applications. The platform combines the IBM i OS, integrated Db2 for i database, and system management tooling with Power Systems hardware features for workload isolation and consolidation. It is typically deployed on-premises or in IBM Power-based hosting environments rather than general-purpose x86 public cloud instances.
Tight OS and hardware integration
IBM i is designed specifically for IBM Power Systems, which enables consistent performance characteristics and a controlled hardware/software stack. This reduces variability compared with environments that span many commodity server configurations. The integrated Db2 for i database and OS services simplify some application architectures for IBM i-native workloads. Organizations with long-lived IBM i applications often benefit from stable platform compatibility over time.
Mature partitioning and isolation
PowerVM and LPARs provide hardware-backed partitioning that supports consolidating multiple IBM i environments on a single Power server. This model is commonly used to separate production, test, and development workloads with defined CPU and memory allocations. Virtual I/O and shared processor pools support flexible resource sharing across partitions. These capabilities are well-suited to data center virtualization use cases where predictable isolation matters.
Operational tooling for IBM i
IBM i includes platform-specific administration, security, and job management capabilities that align with IBM i operational practices. The integrated nature of the OS and database can reduce the number of separate components to deploy and patch for IBM i workloads. Many organizations rely on established IBM i monitoring, backup, and HA/DR ecosystems that integrate with the platform. This can lower operational friction for teams already standardized on IBM i.
Limited portability beyond Power
IBM i runs on IBM Power Systems and does not provide the same hardware portability as x86-based server virtualization stacks. Moving workloads to common public cloud VM services typically requires re-platforming or using specialized Power-based hosting. This can increase switching costs and constrain infrastructure sourcing options. It is less suitable for organizations prioritizing broad multi-cloud portability.
Smaller talent and ecosystem pool
IBM i skills (administration, development, and operations) are less common than mainstream Linux and Windows server skills. Hiring and training can be more challenging, particularly for modern DevOps practices that assume commodity platforms. Some third-party tools and integrations target Linux-first environments, which may require additional effort on IBM i. This can affect time-to-delivery for teams building cloud-native patterns.
Cost and procurement complexity
Deployments typically involve Power server procurement and IBM software licensing, which can be more complex than pay-as-you-go VM consumption models. Capacity planning often ties to hardware configurations and partition entitlements. For smaller or highly elastic workloads, this can be less cost-efficient than commodity virtualization or public cloud instances. Budgeting may also require coordination across hardware, OS, and virtualization layers.
Plan & Pricing
Pricing model: Pay-as-you-go (IBM Power Virtual Server - IBM Cloud) What it covers: IBM i operating system license and IBM software maintenance when ordered through IBM Power Virtual Server (PowerVS). IBM i licenses on PowerVS are metered by software-tier (P05, P10, P20, P30) as core-hour metrics.
Example costs (official IBM documentation, illustrative):
- S922 processor examples: 1 core (dedicated) — $0.51 per hour ($368.91 per month); 1 core (shared uncapped) — $0.13 per hour ($92.33 per month); 1 core (shared capped) — $0.19 per hour ($138.38 per month).
- E980 processor examples: 1 core (dedicated) — $1.77 per hour ($1,291.28 per month); 1 core (shared uncapped) — $0.44 per hour ($322.84 per month); 1 core (shared capped) — $0.66 per hour ($484.26 per month).
- Storage examples: Volume storage Tier 0 — $0.00029589 per GB-hour (
$0.22 per GB/month); Tier 1 — $0.00024658 per GB-hour ($0.18 per GB/month); Tier 3 — $0.00012884 per GB-hour (~$0.09 per GB/month).
Notes & constraints (from official IBM pages):
- IBM documentation states the prices shown are illustrative and recommends using the Power Virtual Server cost estimator for exact pricing. IBM Cloud PowerVS billing shows separate metric IDs for IBM i software tiers and for LPPs (P05/P10/P20/P30 core-hour metrics).
- On-premises IBM i perpetual/subscription license list prices are not published on public IBM product pages; these licenses are ordered through Passport Advantage or via IBM Systems sales (Advanced Administration System), typically requiring contact with IBM or an IBM Business Partner for official quotes.
Important: The above numbers are taken from IBM public product/pricing documentation for IBM Power Virtual Server and are labeled in that documentation as illustrative; actual billed amounts may differ (discounts, regional pricing, promotions).
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