METHOD FOR FILTERING CACHED INPUT/OUTPUT DATA BASED ON DATA GENERATION/CONSUMPTION

摘要

According to one embodiment, filtering cached input/output (I/O) data includes receiving a current I/O transfer that is part of an ongoing data stream, and evaluating whether to filter ongoing data streams once the data stream reaches are particular size threshold. The transfer rate for the ongoing data stream may be calculated and a determination is made as to whether the transfer rate is greater than a throughput associated with a target storage device. The current I/O transfer is cached if the transfer rate is greater than the throughput associated with a target storage device, or is not cached if the transfer rate is not greater than the throughput associated with a target storage device. The current I/O transfer may be also cached if the transfer rate is less than or equal to the throughput associated with the target storage device and the I/O transfer is a write I/O transfer.

主权项

1. A method for filtering cached input/output (I/O) data, comprising:
receiving a current I/O transfer, wherein the current I/O transfer is part of an ongoing sequential data stream and a total data transferred as part of the ongoing sequential data stream is greater than a predetermined threshold; calculating a transfer rate for the ongoing sequential data stream; determining whether the transfer rate is greater than a throughput associated with a target storage device; caching the current I/O transfer on a caching device if the transfer rate is greater than the throughput associated with a target storage device, OR not caching the current I/O transfer if the transfer rate is not greater than the throughput associated with a target storage device; and caching the current I/O transfer on the caching device if the transfer rate is less than or equal to the throughput associated with the target storage device and the I/O transfer is a write I/O transfer.