International Business Machines Corporation

Shao Mei Ji

Peng Hui Jiang

Yuan Yuan Jia

Li Wei Wang

Meng Wang

Yi Liu

Jian Wen

Ge Song

Jin Shan Li

Li Jia Meng

A query string for an encrypted database storing a plurality of encrypted data records is received from a requestor. The query string is segmented to obtain at least one word. The at least one word is encrypted with the irreversible encryption algorithm to obtain at least one encrypted word. At least one first encrypted item with a co-occurrence weight higher than a preset threshold based on the at least one encrypted word and a co-occurrence statistics model is acquired. The co-occurrence statistics model is built to provide co-occurrence weights, each indicating a probability that the at least one encrypted word appears in a first encrypted data item of the plurality of encrypted data records. At least one second encrypted data item corresponding to the at least one first encrypted data item is acquired from the plurality of encrypted data records.

Data query against an encrypted database

Embodiments of the present disclosure relate to a method, system and computer program product for service retention in a computing environment. According to the method, a deprovision request for deprovisioning a target service instance provisioned in a computing environment is received. In response to the deprovision request, a retention policy associated with the target service instance is determined. The retention policy indicates an action to be applied on the target service instance. The action causes a resource usage level of the target service instance to reduce. Based on the retention policy, the target service instance is modified to obtain a retention service instance provisioned in the computing environment for use in restoration of the target service instance.

Service retention in a computing environment

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Beijing, China

Shao Mei Ji