Efficient inline data de-duplication on a storage system

摘要

A mechanism is provided in a storage system for efficient inline data de-duplication. The mechanism receives a write command and a hash key for a portion of data to be written from an application host to a write address. The write command indicates whether the application host is tolerant or intolerant to data loss. Responsive to the write command indicating the application host is tolerant to data loss, the mechanism performs a hash key lookup in a hash index. The mechanism determines whether the portion of data has previously been written to the storage system. Responsive to determining the portion of data has previously been written to the storage system, the mechanism stores a pointer to the previously written data at the write address.

主权项

1. A computer program product comprising a non-transitory computer readable storage medium having a computer readable program stored therein, wherein the computer readable program, when executed on a storage system, causes the storage system to:
receive a write command and a hash key for a portion of data to be written from an application executing on a host system to a write address, wherein the write command indicates whether the application is tolerant or intolerant to data loss and wherein the hash key is calculated by the host system; responsive to the write command indicating the application is tolerant to data loss, perform a hash key lookup in a hash index; determine whether the portion of data has previously been written to the storage system; and responsive to the storage system determining the portion of data has previously been written to the storage system, store a pointer to the previously written data at the write address.