Before revision:  Such codes provide multiple disjoint recovery groups for each data object, which makes it possible for multiple users to access the same object in a non-overlapping way. However in the presence of server-side performance variability, downloading an object using a recovery group takes longer than using a single server hosting the object. Therefore it is not immediately clear whether availability codes reduce latency to access hot data . Accordingly, the goal of this paper is to analyze, using a queuing theoretical approach, the download time in storage systems that employ availability codes .
After revision:  Such codes provide multiple disjoint recovery groups for each data object, thus providing flexibility in accessing data objects. This paper presents techniques for analyzing the download time in storage systems that employ availability codes .