> ## Documentation Index > Fetch the complete documentation index at: https://docs.automq.com/llms.txt > Use this file to discover all available pages before exploring further. # Glossary > Definitions of the primary resources and concepts used in AutoMQ Cloud. In this documentation, AutoMQ product service provider, AutoMQ service provider, and AutoMQ refer to AutoMQ HK Limited. ## Terminology Details ### Environment An Environment is the management boundary for the infrastructure, region, network, and authorization settings used by AutoMQ Cloud. AutoMQ resources are created and managed within an Environment. ### Environment Status Environment Status indicates the current lifecycle or operational state of an Environment, such as creating, running, updating, or service disruption. ### Instance An Instance is an AutoMQ service resource that corresponds to an Apache Kafka® cluster. Its configuration defines the cluster lifecycle, capacity, network, security, and feature settings. ### Member A Member is an account identity that can access AutoMQ Cloud resources. AutoMQ Cloud provides the Admin, Operator, and Viewer roles. For more information, see [Identity and access management overview](/automq-cloud/manage-identities-and-access/overview). ### ServiceAccount A ServiceAccount is a non-human AutoMQ Cloud account identity used for programmatic access. It has a name, description, status, and source, and is authorized through AutoMQ identity and access management. ### Connect Cluster A Connect Cluster is a managed Kafka Connect worker cluster. It defines the runtime version, plugins, compute capacity, deployment location, worker configuration, and identity used to run Connectors. ### Connector A Connector is a source or sink workload that runs on a Connect Cluster. It uses a connector plugin and configuration to transfer data between Kafka and an external system. ### OpsTunnel OpsTunnel is a time-bound managed operations channel between an AutoMQ BYOC (Bring Your Own Cloud) environment and the AutoMQ operations service. It is used for authorized troubleshooting access and can be closed by the environment administrator. ### Data Bucket A Data Bucket is an object storage bucket used by an AutoMQ instance to store Kafka data and metadata. ### Ops Bucket An Ops Bucket is an object storage bucket used to store logs, metrics, and diagnostic data for managed operations. Access is controlled separately from the Data Bucket. ### Payment A Payment identifies the payment method associated with an AutoMQ subscription. It records the payment type, display name, and, when applicable, the customer identifier assigned by the payment provider. ### Kafka Links Kafka Links is an AutoMQ capability for continuously replicating Kafka topics between source and destination instances. It can be used for data migration, disaster recovery, and cross-region data distribution. ### EBS (Elastic Block Store) WAL (Write-Ahead Log) EBS WAL is a WAL mode that stores data on Amazon EBS volumes attached to AutoMQ broker nodes. ### NFS WAL NFS WAL is a write-ahead log mode that stores WAL data on a shared Network File System that is accessible to AutoMQ broker nodes. ### S3 WAL S3 WAL is a write-ahead log mode that stores WAL data in S3-compatible object storage.