Adapting to predicted changes in host transmission rates
AssigneeInternational Business Machines Corporation
InventorTakashi Katagiri
Life of this patent
Estimating the term…
Abstract
In one embodiment, a method is provided for adapting a host transfer rate between a host and a tape drive to a medium transfer rate between the tape drive and a tape. A data compression rate of untransferred data in a buffer of a tape drive is measured. A change in a future host transfer rate is predicated based on the measured compression rate. A host transfer rate between a host and the tape drive is adapted to a medium transfer rate between the tape drive and a tape, based on the predicted change.
Claims12
A method for adapting a host transfer rate between a host and a tape drive to a medium transfer rate between the tape drive and a tape, the method comprising:
- measuring a data compression rate of untransferred data in a buffer of a tape drive;
- predicting a change in a future host transfer rate based on the measured compression rate;
- and
- adapting a host transfer rate between a host and the tape drive to a medium transfer rate between the tape drive and a tape, based on the predicted change.
A tape drive for adapting a host transfer rate of a host to a medium transfer rate of a tape, the tape drive being configured to:
- measure a data compression rate of untransferred data in a buffer of the tape drive;
- predict a change in a future host transfer rate based on the measured compression rate;
- and
- adapt a host transfer rate between a host and the tape drive to a medium transfer rate between the tape drive and a tape, based on the predicted change.
An apparatus, comprising:
- a tape cartridge configured to write compression rate data to tape to enable adaption of a host transfer rate between a host and a tape drive, to a medium transfer rate between the tape drive and the tape,
- wherein the tape cartridge is configured to enable a tape drive, when the tape cartridge is mounted in the tape drive, to write to the tape, as metadata, results of measuring a data compression rate of untransferred data in a buffer of the tape drive, and to read compression rate data from the tape, such that the tape drive can predict changes in a future host transfer rate and adapt the host transfer rate to the medium transfer rate based on the predicted change.
Dependencies are inferred from the claim text.