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• #4863 fLeSs nagyúr allein #4854

  2010-03-15 16:03:59 #4863

  Összes hozzászólása itt Válaszok az összes hozzászólására itt Válaszok erre a hozzászólásra

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  fLeSs

  nagyúr

  válasz allein #4854 üzenetére

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  "Transactional logs are written in a sequential and synchronous manner. Since SAS disks are capable of delivering very respectable sequential data rates, it is not surprising that replacing the SAS "log disks" with SSDs does not boost performance at all. However, placing your database data files on an Intel X25-E is an excellent strategy. One X25-E is 66% faster than eight (!) 15000RPM SAS drives. That means if you don't need capacity, you can replace about 13 SAS disks with one SSD to get the same performance. You can keep the SAS disks as your log drives as they are a relatively cheap way to obtain good logging performance."

  

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