公开(公告)号：EP3365811A1

公开(公告)日：2018-08-29

申请号：EP16788924.5

申请日：2016-10-22

申请人： Oracle International Corporation

发明人： MACNICOL, Roger D. ,  SHAH, Viral ,  HUA, Xia ,  KAMP, Jesse ,  CHAVAN, Shasank K. ,  COLGAN, Maria ,  LAHIRI, Tirthankar ,  NG, Adrian Tsz Him ,  MEIYYAPPAN, Krishnan ,  GANESH, Amit ,  LOAIZA, Juan R. ,  UMAMAGESWARAN, Kothanda ,  QIN, Yiran

IPC分类号： G06F17/30

CPC分类号： G06F17/30457 ,  G06F3/061 ,  G06F3/0647 ,  G06F3/065 ,  G06F3/067 ,  G06F12/0811 ,  G06F12/0897 ,  G06F17/30312 ,  G06F17/30315 ,  G06F2212/1016 ,  G06F2212/163 ,  G06F2212/225

摘要： Techniques are provided for storing in in-memory unit (IMU) in a lower-storage tier and copying the IMU to DRAM when needed for query processing. Techniques are also provided for copying IMUs to lower tiers of storage when evicted from the cache of higher tiers of storage. Techniques are provided for implementing functionality of IMUs within a storage system, to enable database servers to push tasks, such as filtering, to the storage system where the storage system may access IMUs within its own memory to perform the tasks. Metadata associated with a set of data may be used to indicate whether an IMU for the data should be created by the database server machine or within the storage system.