When you migrate user accounts from VantageCloud Enterprise or VantageCore to VantageCloud Lake, you need to consider these changes:
System Accounting in VantageCloud Enterprise and VantageCore
In VantageCloud Enterprise and VantageCore systems, the account string provides additional functionality to support System Accounting. By default, the system logs CPU and logical I/O count information to the DBC.ACCTG table for each user or account string combination, cumulatively. You can set the CPU and I/O information logged for a user or account string combination to different levels of resource usage detail by using specialized Account String Expansion (ASE) variables embedded within an account string.
Changes in VantageCloud Lake
- Limited Use of ASE Variables:
Although VantageCloud Lake still supports ASE variables, their usefulness is diminished in VantageCloud Lake environment, especially when you use Compute Clusters. In VantageCloud Lake, the UserName and account string are not shared between the Primary Cluster and a Compute Cluster. Additionally, the system does not log resource usage in DBC.ACCTG for Compute Clusters, making this method ineffective for Compute Cluster System Accounting.
- Primary Cluster-Only Environments:
If you migrate to a Primary Cluster-only VantageCloud Lake environment, the system will still support the System Accounting features available in VantageCloud Enterprise and VantageCore. However, when you incorporate Compute Clusters into your environment, you should follow the Priority and User-defined Metadata model described earlier.
By recognizing these changes and adapting your strategy for populating user accounts, you can effectively manage system accounting and resource usage in VantageCloud Lake.
Workload Management
You may need to control who gets specific system resources. See Managing Your Workloads .