公开(公告)号：EP2973018A1

公开(公告)日：2016-01-20

申请号：EP14714833.2

申请日：2014-03-03

申请人： Oracle International Corporation

发明人： LOAIZA, Juan ,  GANESH, Amit ,  MACNICOL, Roger ,  KAMP, Jesse ,  HOLLOWAY, Allison ,  NG, Adrian ,  MARWAH, Vineet

IPC分类号： G06F17/30

CPC分类号： G06F12/0875 ,  G06F17/30312 ,  G06F17/3048

摘要： A method for accelerating queries using dynamically generated columnar data in a flash cache is provided. In an embodiment, a method comprises a storage device receiving a first request for data that is stored in the storage device in a base major format in one or more primary storage devices. The storage device comprises a cache. The base major format is any one of: a row-major format, a column-major format and a hybrid-columnar format. Based on first one or more criteria, it is determined whether to rewrite the data into rewritten data in a rewritten major format. In response to determining to rewrite the data into rewritten data in a rewritten major format, the storage device rewrites at least a portion of the data into particular rewritten data in the rewritten major format. The rewritten data is stored in the cache.

公开(公告)号：EP3688611A1

公开(公告)日：2020-08-05

申请号：EP18792664.7

申请日：2018-09-28

申请人： Oracle International Corporation

发明人： MACNICOL, Roger ,  HUA, Xia ,  HOLLOWAY, Allison ,  CHAVAN, Shasank ,  KAMP, Jesse ,  COLGAN, Maria ,  LAHIRI, Tirthankar

IPC分类号： G06F16/00

公开(公告)号：EP2972788B1

公开(公告)日：2019-08-21

申请号：EP14720760.9

申请日：2014-03-12

申请人： Oracle International Corporation

发明人： GANESH, Amit ,  CHAVAN, Shasank K. ,  MARWAH, Vineet ,  KAMP, Jesse ,  PATTHAK, Anindya C. ,  GLEESON, Michael J. ,  HOLLOWAY, Allison L. ,  MACNICOL, Roger

IPC分类号： G06F9/30

公开(公告)号：EP2972788A2

公开(公告)日：2016-01-20

申请号：EP14720760.9

申请日：2014-03-12

申请人： Oracle International Corporation

发明人： GANESH, Amit ,  CHAVAN, Shasank K. ,  MARWAH, Vineet ,  KAMP, Jesse ,  PATTHAK, Anindya C. ,  GLEESON, Michael J. ,  HOLLOWAY, Allison L. ,  MACNICOL, Roger

IPC分类号： G06F9/30

CPC分类号： G06F9/30018 ,  G06F9/30021 ,  G06F9/30025 ,  G06F9/30032 ,  G06F9/30036

摘要： A method and apparatus for efficiently processing data in various formats in a single instruction multiple data ("SIMD") architecture is presented. Specifically, a method to unpack a fixed-width bit values in a bit stream to a fixed width byte stream in a SIMD architecture is presented. A method to unpack variable-length byte packed values in a byte stream in a SIMD architecture is presented. A method to decompress a run length encoded compressed bit-vector in a SIMD architecture is presented. A method to return the offset of each bit set to one in a bit-vector in a SIMD architecture is presented. A method to fetch bits from a bit-vector at specified offsets relative to a base in a SIMD architecture is presented. A method to compare values stored in two SIMD registers is presented.

摘要翻译： 提出了一种在单指令多数据（“SIMD”）结构中有效处理各种格式的数据的方法和装置。 具体地说，提出了一种在SIMD架构中将位流中的固定宽度位值解包为固定宽度字节流的方法。 介绍了一种在SIMD架构中解压缩字节流中可变长度字节打包值的方法。 提出了一种在SIMD架构中解压缩运行长度编码的压缩位向量的方法。 提出了一种将SIMD架构中的位向量中的每个位设置为1的偏移量返回的方法。 提出了一种从SIMD架构中相对于基址指定的偏移量从位向量获取位的方法。 介绍了一种比较存储在两个SIMD寄存器中的值的方法。