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    • 7. 发明授权
    • Enhanced resynchronization in a storage-based mirroring system having different storage geometries
    • 在具有不同存储几何形状的基于存储的镜像系统中增强了重新同步
    • US07539892B2
    • 2009-05-26
    • US11251339
    • 2005-10-14
    • Pierre-Fortin Jean-DenisGail A SpearRobert F BartfaiWarren K Stanley
    • Pierre-Fortin Jean-DenisGail A SpearRobert F BartfaiWarren K Stanley
    • G06F11/00
    • G06F11/2082G06F11/2071
    • Resynchronization of data between a primary (production) data site and a secondary (recovery) site following a failure is enhanced when the size of a data track at the production site is different from the size of a data track at the recovery site. The recovery site reads an out-of-sync (OOS) bitmap created at the production site and expands or contracts the bitmap to accommodate the size difference. The resulting production site bitmap is merged with a OOS bitmap maintained at the recovery site to indicate those tracks which are to be transferred from the recovery site to the production site. Thus, only those tracks which are required to be transferred are transferred. Buffer space may be allocated in which to expand or contract the production site OOS bitmap. Buffer space may be conserved by sequentially reading portions of the production site OOS bitmap into a small buffer. In a first operation, half of the bitmap portion is discarded and the remaining half is expanded into the buffer and merged with a corresponding section of the recovery site OOS bitmap. In a second operation, the portion is re-read into the buffer and the other half discarded. The remaining half is then expanded into the buffer and merged with the corresponding section of the recovery site OOS bitmap. The process continues until the entire production site OOS bitmap has been merged with the recovery site OOS bitmap.
    • 当生产现场的数据轨道的大小与恢复站点上的数据轨道的大小不同时,会在故障后的主要(生产)数据站点和辅助(恢复)站点之间重新同步数据。 恢复站点读取在生产站点创建的不同步(OOS)位图,并扩展或收缩位图以适应大小差异。 生成的生产站点位图与恢复站点上维护的OOS位图合并,以指示要从恢复站点传输到生产站点的轨道。 因此,仅传送需要传送的那些轨道。 可以分配缓冲区空间来扩展或收缩生产站点OOS位图。 可以通过将生产站点OOS位图的部分顺序读入小缓冲区来保存缓冲区空间。 在第一个操作中,位图部分的一半被丢弃,剩下的一半被扩展到缓冲区,并与恢复站点OOS位图的相应部分合并。 在第二操作中,该部分被重新读入缓冲器,另一半被丢弃。 然后剩下的一半扩展到缓冲区并与恢复站点OOS位图的相应部分合并。 该过程一直持续到整个生产站点OOS位图已经与恢复站点OOS位图合并。
    • 10. 发明授权
    • Apparatus for attenuating Stoneley waves in a borehole
    • 用于在洞穴中衰减石棉波的装置
    • US5185503A
    • 1993-02-09
    • US800907
    • 1991-11-26
    • Jean-Pierre Fortin
    • Jean-Pierre Fortin
    • G01V1/52
    • G01V1/52Y10S367/911
    • Apparatus for attenuating Stoneley waves propagating in a borehole along a given direction, the borehole containing a fluid in which at least one seismic transducer is immersed. According to the invention, the apparatus comprises pressure transmission means firstly for placing in a region of the borehole where the hydrostatic pressure is not less than the hydrostatic pressure at the level of the seismic transducer, and secondly for transmitting pressure to at least one flexible hose containing a gas, the hose being disposed upstream from the seismic transducer relative to the propagation direction of the Stoneley waves. The apparatus is applicable to geological exploration by performing a seismic survey in a borehole.
    • 用于衰减沿着给定方向在钻孔中传播的斯通利波的装置,所述钻孔包含其中至少一个地震换能器被浸没的流体。 根据本发明,该装置包括压力传递装置,其首先用于放置在钻孔的区域内,其中静水压力不小于地震换能器水平面处的静水压力,其次用于将压力传递到至少一个柔性软管 包含气体,软管相对于斯通利波浪的传播方向设置在地震换能器的上游。 该装置适用于在钻孔中进行地震勘测的地质勘查。