Unify cache instance between DLA and cloud native datacache

[GavinMar]

• [Feature] Unify cache instance between DLA and cloud native datacache. #52793

Feature request

Is your feature request related to a problem? Please describe.

The current DLA and cloud native datacache are both built on the underlying starcache library, but they are two different instances. This leads to:

1. Increased user configuration complexity, requiring users to reserve hardware resources such as disks for two caches and configure them separately. Configure the parameters of two cache instances in order to use them properly.
2. Low resource utilization rate. The inability to achieve global unified scheduling of resources such as disks can easily lead to resource waste.
3. Redundant external configuration and indicator items.
4. There are many redundant development logics.

Describe the solution you'd like

• Unified cache instance between DLA and cloud native datacache, including the cache instance, configurations and metrics, etc.
• Support slru cache eviction policy.

Describe alternatives you've considered

Additional context