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Cell Pool

Enhanced Definition

A `cell pool` is a specialized storage management mechanism in z/OS that pre-allocates and manages a collection of fixed-size storage blocks, known as cells. Its primary purpose is to provide highly efficient and fast allocation and deallocation of frequently used, identically sized control blocks or data structures for system components and high-performance applications.

Key Characteristics

- Fixed-Size Cells: All storage blocks within a specific cell pool are of a uniform, predefined size, optimizing allocation logic and reducing overhead.
- Pre-allocation: A significant portion, or the entirety, of the cell pool's storage is typically acquired upfront from the operating system, reducing the overhead of individual GETMAIN requests during runtime.
- High Performance: Allocation and deallocation operations are extremely fast