NA-CLTM flashcards
NA-CLTM · Build recall with a focused review session.
32 cards. Read the term and the definition here. The deck at the top of this page is optional.
- Controller VM (CVM)
- A VM running on every Nutanix node that owns the local disks and serves storage I/O to all hypervisors in the cluster over the internal network.
- Prism Element vs Prism Central
- Prism Element manages a single cluster; Prism Central manages multiple clusters and adds categories, RBAC, and cross-cluster features such as protection policies and Calm.
- Nutanix Cloud Clusters (NC2)
- A service that runs the AOS, AHV, and Prism stack on public cloud bare-metal instances, preserving the same operational model as on-premises Nutanix.
- NCC health check
- Nutanix Cluster Check validates configuration and health across the cluster, producing a score and failed checks typically reviewed before upgrades or after changes.
- Oplog
- A persistent, log-structured write buffer on the local CVM that absorbs incoming writes before they are drained to extent stores as immutable extents.
- Replication factor (RF)
- The number of copies of data maintained across failure domains; RF2 tolerates one failure and RF3 tolerates two, at increasing capacity cost.
- Erasure coding
- A data protection scheme that stores parity fragments instead of full replicas, reducing capacity overhead at the cost of CPU and different rebuild behavior.
- Curator
- A background service that scans metadata and data to re-protect after failures, rebalance after node additions, and discard stale extents.
- Storage container
- A policy boundary defining replication factor, compression, deduplication, and erasure coding; vDisks inherit the container policy at creation time.
- Unified cache
- A local SSD read cache that serves VM reads regardless of which host runs the VM, reducing cross-network traffic and read latency.
- AHV
- Nutanix's native KVM-based Type-1 hypervisor, managed through Prism and using Acropolis for VM lifecycle and the CVM for storage I/O.
- Categories
- Key-value pairs assigned to VMs, hosts, or images that drive policy-based placement, RBAC scoping, and protection domain membership.
- Affinity policy
- A placement rule that constrains VMs to run on the same host or on separate hosts, enforced by Acropolis during placement and HA events.
- Nutanix Guest Tools
- In-guest agents that enable VSS-consistent snapshots, self-service restore, and file-level restore on supported guest operating systems.
- Image service
- A repository of VM images that can be served directly to VMs without full copies, enabling fast cloning and lower storage consumption.
- Lifecycle Manager (LCM)
- A Prism feature that inventories firmware and software, runs pre-upgrade checks, and performs upgrades of AOS, AHV, Prism Central, and firmware.
- Effective capacity
- Usable capacity after replication factor or erasure coding overhead; Prism reports it along with runway estimates based on historical growth.
- Alert forwarding
- Configuration that sends Prism alerts to SNMP, email, or syslog targets, with policies that can suppress or escalate based on categories.
- Prism Central sizing
- The process of selecting Prism Central VM resources per the official sizing guide based on the number of managed VMs and clusters.
- Task UUID
- The identifier returned by long-running Prism API operations; clients poll the task endpoint until the task reaches SUCCEEDED or FAILED.
- Nutanix Calm
- A blueprint service that models multi-tier applications with services, dependencies, and actions, deployable across AHV, ESXi, and public clouds.
- Nutanix Foundation
- A tool for imaging and creating clusters that can be driven by a configuration file for repeatable bare-metal provisioning.
- Terraform Nutanix provider
- An infrastructure-as-code provider that manages VMs, images, categories, and networking through Prism APIs using credentials or API keys.
- API pagination
- Prism APIs support length and offset parameters plus filtering and sorting, so large result sets are retrieved in bounded pages.
- Prism Central RBAC
- An access control model of roles, users, and role assignments, where roles define allowed actions and can be scoped to categories or clusters.
- Category-scoped role assignment
- A role assignment limited to objects carrying a specific category value, enforcing least privilege without managing individual object permissions.
- Nutanix Flow
- A distributed firewall and microsegmentation feature that enforces policies at the vNIC level, with policies applied to categories rather than individual VMs.
- Data-at-rest encryption
- Protection using self-encrypting drives or software encryption, with key management either local or integrated with an external key management service.
- Cluster lockdown mode
- A hardened configuration that restricts SSH access to the CVM and requires a supported workflow to disable before administrative access is restored.
- Protection domain
- A Prism Central object that groups VMs by category or explicit list and defines snapshot schedules with retention policies.
- Nutanix Leap
- A disaster recovery orchestration service that manages protection policies, recovery plans, and one-click failover and failback with application runbooks.
- Async replication RPO
- Replication sends snapshots on a schedule, so the recovery point objective equals the replication interval rather than zero.