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    • 3. 发明授权
    • Dynamic look-ahead extent migration for tiered storage architectures
    • 分层存储体系结构的动态预测范围迁移
    • US08578114B2
    • 2013-11-05
    • US13455062
    • 2012-04-24
    • Paul Anthony Jennas, IILarry JuarezDavid MontgomeryTodd Charles Sorenson
    • Paul Anthony Jennas, IILarry JuarezDavid MontgomeryTodd Charles Sorenson
    • G06F12/00
    • G06F3/0613G06F3/0647G06F3/0685
    • A method for migrating extents between extent pools in a tiered storage architecture maintains a data access profile for an extent over a period of time. Using the data access profile, the method generates an extent profile graph that predicts data access rates for the extent into the future. The slope of the extent profile graph is calculated and used to determine whether the extent will reach a migration threshold within a specified “look-ahead” time. If so, the method calculates a migration window that allows the extent to be migrated prior to reaching the migration threshold. In certain embodiments, the method determines the overall performance impact on the source extent pool and destination extent pool during the migration window. If the overall performance impact is below a designated impact threshold, the method migrates the extent during the migration window.
    • 在分层存储架构中的扩展池之间迁移扩展区的方法在一段时间内维护扩展区的数据访问配置文件。 使用数据访问配置文件,该方法生成一个扩展配置文件图,可以预测未来数据访问速率。 计算范围轮廓图的斜率并用于确定范围是否将在指定的“预先”时间内达到迁移阈值。 如果是这样,该方法将计算迁移窗口,该窗口允许在达到迁移阈值之前迁移范围。 在某些实施例中,该方法确定在迁移窗口期间对源扩展池和目的地扩展池的总体性能影响。 如果总体性能影响低于指定的影响阈值,则该方法会在迁移窗口中迁移该范围。
    • 4. 发明授权
    • Dynamic look-ahead extent migration for tiered storage architectures
    • 分层存储体系结构的动态预测范围迁移
    • US08578108B2
    • 2013-11-05
    • US12849087
    • 2010-08-03
    • Paul Anthony Jennas, IILarry JuarezDavid MontgomeryTodd Charles Sorenson
    • Paul Anthony Jennas, IILarry JuarezDavid MontgomeryTodd Charles Sorenson
    • G06F12/00
    • G06F3/0613G06F3/0647G06F3/0685
    • A method for migrating extents between extent pools in a tiered storage architecture maintains a data access profile for an extent over a period of time. Using the data access profile, the method generates an extent profile graph that predicts data access rates for the extent into the future. The slope of the extent profile graph is calculated and used to determine whether the extent will reach a migration threshold within a specified “look-ahead” time. If so, the method calculates a migration window that allows the extent to be migrated prior to reaching the migration threshold. In certain embodiments, the method determines the overall performance impact on the source extent pool and destination extent pool during the migration window. If the overall performance impact is below a designated impact threshold, the method migrates the extent during the migration window. A corresponding apparatus and computer program product are also disclosed herein.
    • 在分层存储架构中的扩展池之间迁移扩展区的方法在一段时间内维护扩展区的数据访问配置文件。 使用数据访问配置文件,该方法生成一个扩展配置文件图,可以预测未来数据访问速率。 计算范围轮廓图的斜率并用于确定范围是否将在指定的“预先”时间内达到迁移阈值。 如果是这样,该方法将计算迁移窗口,该窗口允许在达到迁移阈值之前迁移范围。 在某些实施例中,该方法确定在迁移窗口期间对源扩展池和目的地扩展池的总体性能影响。 如果总体性能影响低于指定的影响阈值,则该方法会在迁移窗口中迁移该范围。 本文还公开了相应的装置和计算机程序产品。