Exadata X7来了

1、Exadata Brings In-Memory OLTP to Storage

  • Exadata Storage Servers add a memory cache in front of Flash memory
    • Similar to current Flash cache in front of disk
  • Cache is additive with cache at Database Server
    • Only possible because of tight integration with Database
  • 2.5x Lower latency for OLTP IO – 100 usec
  • Up to 21 TB of DRAM for OLTP acceleration with Memory Upgrade Kit
    • Compare to 5TB of flash in V2 Exadata

 

Non-Volatile Memory Cache in Exadata Storage

  • Exadata Storage Servers will add Non-Volatile memory cache in front of Flash memory – Intel 3D X-Point
  • Add software for RDMA access for much lower latency
    • RDMA direct access to NVRAM gives 20x lower latency than Flash
  • NVRAM used as a cache effectively increases its capacity by 10x vs using NVRAM directly as expensive storage
  • Expensive NVRAM shared across servers for lower cost
  • NVRAM mirrored across storage servers for fault-tolerance
posted @ 2017-10-05 22:12  石云华  阅读(250)  评论(0)  编辑  收藏  举报