Symantec Corporation

Veritas Technologies LLC

Tillmann Reusse

Raghupathi Malige

Bala Kumaresan

Edwin Menze

Meher Shah

Gautham Ravi

Techniques for implementing selective file system caching are disclosed. In one particular embodiment, the techniques may be realized as a method including receiving an I/O request from an application such that the application provides a no-cache indication to a file system to implement a direct. I/O for the I/O request, comparing the I/O request and the no-cache indication with a configurable cache map such that the configurable cache map indicates a selective caching based on an I/O type and a file type, processing the I/O request to render a caching decision based on the comparison, and executing selective caching on the I/O request in accordance with the caching decision.

Selective file system caching based upon a configurable cache map

In general, a block of data in a data file is stored in a multi-tier storage system. The block of data includes multiple rows and multiple entry values per row, including values for a particular entry. The values of the particular entry in the data block can be used to determine whether to move the data block to a different tier of a multi-tier storage system. The block of data can then either be relocated in a different tier or kept in the current tier.

Determining whether to relocate data to a different tier in a multi-tier storage system

A method for implementing selective file system caching. The method includes receiving I/O requests from an application and comparing each of the I/O requests with a configurable cache map, wherein the configurable cache map controls a selective caching based on an I/O type and a file type. Each of the I/O requests are processed to render caching decisions based on the configurable cache map. Selective caching is then implemented on each of the I/O requests in accordance with the caching decisions.

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Mountain View, CA, United States of America

Tillmann Reusse