公开(公告)号：US09559720B2

公开(公告)日：2017-01-31

申请号：US13631575

申请日：2012-09-28

Applicant: Oracle International Corporation

Inventor： Vineet Marwah ,  Vikram Kapoor ,  Amit Ganesh ,  Jesse Kemp ,  Sachin Kulkarni ,  Roger Macnicol ,  Kam Shergill ,  Manosiz Bhattacharyya

IPC: G06F17/30 ,  H03M7/30

CPC classification number: H03M7/30 ,  G06F17/30595

Abstract: Techniques are described herein for automatically selecting the compression techniques to be used on tabular data. A compression analyzer gives users high-level control over the selection process without requiring the user to know details about the specific compression techniques that are available to the compression analyzer. Users are able to specify, for a given set of data, a “balance point” along the spectrum between “maximum performance” and “maximum compression”. The point thus selected is used by the compression analyzer in a variety of ways. For example, in one embodiment, the compression analyzer uses the user-specified balance point to determine which of the available compression techniques qualify as “candidate techniques” for the given set of data. The compression analyzer selects the compression technique to use on a set of data by actually testing the candidate compression techniques against samples from the set of data. After testing the candidate compression techniques against the samples, the resulting compression ratios are compared. The compression technique to use on the set of data is then selected based, in part, on the compression ratios achieved during the compression tests performed on the sample data.

Abstract translation: 这里描述了用于自动选择要在表格数据上使用的压缩技术的技术。 压缩分析仪为用户提供了对选择过程的高级控制，而不需要用户了解有关压缩分析器可用的特定压缩技术的细节。 用户可以为给定的数据集指定沿“最大性能”和“最大压缩”之间的“平衡点”。 所选择的点由压缩分析器以各种方式使用。 例如，在一个实施例中，压缩分析器使用用户指定的平衡点来确定哪个可用的压缩技术符合给定的数据集合的“候选技术”。 压缩分析仪通过对来自该组数据的样本实际测试候选压缩技术来选择对一组数据使用的压缩技术。 在针对样品测试候选压缩技术之后，比较所得到的压缩比。 然后，部分地基于在对样本数据执行的压缩测试期间实现的压缩比来选择在该组数据上使用的压缩技术。

公开(公告)号：US20130036101A1

公开(公告)日：2013-02-07

申请号：US13631575

申请日：2012-09-28

Applicant: Oracle International Corporation

Inventor： Vineet Marwah ,  Vikram Kapoor ,  Amit Ganesh ,  Jesse Kemp ,  Sachin Kulkarni ,  Roger Macnicol ,  Kam Shergill ,  Manosiz Bhattacharyya

IPC: G06F17/30

CPC classification number: H03M7/30 ,  G06F17/30595

Abstract: Techniques are described herein for automatically selecting the compression techniques to be used on tabular data. A compression analyzer gives users high-level control over the selection process without requiring the user to know details about the specific compression techniques that are available to the compression analyzer. Users are able to specify, for a given set of data, a “balance point” along the spectrum between “maximum performance” and “maximum compression”. The point thus selected is used by the compression analyzer in a variety of ways. For example, in one embodiment, the compression analyzer uses the user-specified balance point to determine which of the available compression techniques qualify as “candidate techniques” for the given set of data. The compression analyzer selects the compression technique to use on a set of data by actually testing the candidate compression techniques against samples from the set of data. After testing the candidate compression techniques against the samples, the resulting compression ratios are compared. The compression technique to use on the set of data is then selected based, in part, on the compression ratios achieved during the compression tests performed on the sample data.

Abstract translation: 这里描述了用于自动选择要在表格数据上使用的压缩技术的技术。 压缩分析仪为用户提供了对选择过程的高级控制，而不需要用户了解有关压缩分析器可用的特定压缩技术的细节。 用户可以为给定的数据集指定沿最大性能和最大压缩之间的平衡点。 所选择的点由压缩分析器以各种方式使用。 例如，在一个实施例中，压缩分析器使用用户指定的平衡点来确定哪些可用的压缩技术被鉴定为用于给定的一组数据的候选技术。 压缩分析仪通过对来自该组数据的样本实际测试候选压缩技术来选择对一组数据使用的压缩技术。 在针对样品测试候选压缩技术之后，比较所得到的压缩比。 然后，部分地基于在对样本数据执行的压缩测试期间实现的压缩比来选择在该组数据上使用的压缩技术。