text: For more information about RtC, see IBM Real-time Compression in IBM SAN Volume 
  Controller and IBM Storwize V7000, REDP-4859. 
  
  **10.5.1 Real-time Compression concepts**
  
  At a high level, the IBM RACE component compresses data that is written into the storage 
  system dynamically. This compression occurs transparently, so Fibre Channel and iSCSI 
  connected hosts are not aware of the compression. RACE is an inline compression 
  technology, which means that each host write is compressed as it passes through IBM 
  Spectrum Virtualize to the disks. This technology has a clear benefit over other compression 
  technologies that are post-processing based. 
  
  These technologies do not provide immediate capacity savings. Therefore, they are not a 
  good fit for primary storage workloads, such as databases and active data set applications. 
  
  RACE is based on the Lempel-Ziv lossless data compression algorithm and operates by 
  using a real-time method. When a host sends a write request, the request is acknowledged by 
  the write cache of the system, and then staged to the storage pool. As part of its staging, the 
  write request passes through the compression engine and is then stored in compressed 
  format onto the storage pool. Therefore, writes are acknowledged immediately after they are 
  received by the write cache with compression occurring as part of the staging to internal or 
  external physical storage. 