利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

2 条记录 (耗时 0.014 秒)

    Reducing total seek time for determining an access sequence of data stored on a tape medium
    1.
    发明授权
    Reducing total seek time for determining an access sequence of data stored on a tape medium 有权
    减少用于确定存储在磁带介质上的数据的访问顺序的总寻道时间

    公开(公告)号：US09343111B2

    公开(公告)日：2016-05-17

    申请号：US14503581

    申请日：2014-10-01

    申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION

    发明人： Takashi Katagiri ,  Yuhko Mori ,  Masakatsu Murata ,  Hirokazu Nakayama ,  Yutaka Oishi

    IPC分类号： G11B15/18 ,  G11B27/10 ,  G11B5/55 ,  G11B20/10

    CPC分类号： G11B27/107 ,  G11B5/5513 ,  G11B20/10 ,  G11B2020/10916

    摘要： A first data group in an access sequence is selected. Those data groups located in specified regions of the tape medium are separated from other data groups located in alternative specified regions of the tape medium. The distance from the current position of the tape medium is set to be a logical distance value, determined by a calculation function, that is substituted for the physical distance value for the data groups that are located in the specified regions as compared with other data groups located in the alternative specified regions. A second data group in the access sequence is selected. The logical distance value is then determined by multiplying a coefficient based on a physical positioning of each of the data groups in the tape medium, and a percentage of those of the plurality of data groups that have already been selected as the first data group and the second data group.

    摘要翻译： 选择访问序列中的第一个数据组。 位于带介质的指定区域中的那些数据组与位于磁带介质的备选指定区域中的其他数据组分离。 与磁带介质的当前位置的距离被设置为由计算函数确定的逻辑距离值，其代替与其他数据组相比位于指定区域中的数据组的物理距离值 位于替代指定区域。 选择访问序列中的第二个数据组。 然后，通过将基于磁带介质中的每个数据组的物理定位的系数与已经被选择为第一数据组的多个数据组的系数的百分比相乘来确定逻辑距离值， 第二个数据组。