Recap

Why Persistent Memory (PM)?

• Traditional disk-oriented DBMSs have high latency I/O bottlenecks.
• In-memory DBMSs avoid disk latency but lack durability.
• Persistent Memory (PM) provides the best of both worlds:
  • Fast, byte-addressable access like DRAM
  • Persistence like SSDs/HDDs

Disk-Oriented vs. In-Memory DBMSs

Disk-Oriented DBMS

• Primary storage is non-volatile (SSD, HDD).
• Uses buffer pool to move pages between disk and memory.
• Page-based access (read/write in blocks).
• Slower but supports large-scale datasets.

In-Memory DBMS

• Data is stored entirely in DRAM.
• Tuple-based access (byte-addressable).
• No need for buffer pool or disk I/O.
• Much faster but limited by DRAM size.

Persistent Memory DBMSs

Why PM is a Game-Changer?