Erasure coding is a low-cost redundancy mechanism for distributed storage systems by
storing stripes of data and parity chunks. Wide stripes are recently proposed to suppress the …

This paper presents URSA, a hybrid block store that provides virtual disks for various
applications to run efficiently on cloud VMs. Trace analysis shows that the I/O patterns …

Unikernel specializes a minimalistic LibOS and a target application into a standalone single-
purpose virtual machine (VM) running on a hypervisor, which is referred to as (virtual) …

Flash-based solid-state drives (SSDs) have been widely adopted in various storage
systems, manifesting better performance than their forerunner HDDs. However, the …

Erasure codes in large-scale storage systems allow recovery of data from a failed node. A
recently developed class of codes, locally repairable codes (LRCs), offers tradeoffs between …

Data placement is critical for the scalability of decentralized object-based storage systems.
The state-of-the-art CRUSH placement method is a decentralized algorithm that …

A significant drawback of erasure codes is suffering from the expensive update overhead,
and all parity blocks are regenerated once any update of one data block for consistency …

The migration of traditional desktop and server applications to the cloud brings challenge of
high performance, high reliability, and low cost to the underlying cloud storage. To satisfy the …

The update performance in erasure-coded data centers is often bottlenecked by the
constrained cross-rack bandwidth. We propose CAU, a cross-rack-aware update …

Erasure coding has been extensively deployed in today's data centers to tackle prevalent
failures, yet it is prone to give rise to substantial cross-rack traffic for parity update. In this …