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In large storage systems, erasure codes is a primary technique to provide high reliability with low monetary cost. Among various erasure codes, a major category called XORbased codes uses purely XOR operations to generate redundant data and offer low computational complexity. These codes are conventionally implemented via matrix based method or several specialized non-matrix based methods. However,...
The high performance and ever-increasing capacity of flash memory has led to the rapid adoption of Solid-State Disks (SSDs) in mass storage systems. In order to increase disk capacity, multi-level cells (MLC) are used in the design of SSDs, but the use of such SSDs in persistent storage systems raise concerns for users due to the low reliability of such disks. In this paper, we present a hybrid erasure-coded...
Network coding (NC) is a promising method used to achieve the channel capacity and enhance the reliability of multicast networks. However, the general wireless multicast networks based on NC are facing big problems such as long delays and large computational complexities. We propose a multicast network based on Batched sparse (BATS) codes which can efficiently solve these problems. Since fountain...
As the technique developing, some important problems in storage systems have been solved appropriately. A good example is the development of RAID-6 code techinque, the appear of it has greatly improved the reliability, availability of modern storage systems. Some best known vertical RAID-6 code like P-code and X-code has acquire optimal or near optimal performance in encoding, decoding and update...
This paper introduces a robust point-to-point transmission scheme: Tetrys, that relies on a novel on-the-fly erasure coding concept which reduces the delay for recovering lost data at the receiver side. In current erasure coding schemes, the packets that are not rebuilt at the receiver side are either lost or delayed by at least one RTT before transmission to the application. The present contribution...
We present a new class of erasure codes of size ntimesn (n is a prime number) called T-code, a new family of simple, highly fault tolerant XOR-based erasure codes for storage systems (with fault tolerance up to 15). T-code is not maximum distance separable (MDS), but has many other advantages, such as high fault tolerance, simple computability, and high efficiency of coding and decoding. Because of...
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