SSD and Price fights - Data Tiering

• Another method to fight the price - is using data tiering.
• In this mode - you'll build a single system with both medias,
• and make it automatically move data from SSD storage to HDD storage, when it is less used.
• The problems:
  • Sometimes the raw data is too large - if you have a single DB with random access patterns - how will you split it evenly?
  • Even with a clear "active-set", moving the data on demand is not practical, as it takes a lot of time to move large quantities.
  • A partial relief - using manual tiering - let the user decide which LUN contains critical production data, and which contains less critical data.

Originally written by guy keren