Peabody: The Time Travelling Disk

Disk drives are now available with capacities on the order of hundreds of gigabytes. What has not become available is an easy way to manage storage. With installed machines located across the enterprise, the backup, management of application installation, and maintenance of systems have become a nightmare. An increasing trend in the storage industry is to virtualize storage resources, maintaining a central repository that can be accessed across the network. We have designed a network block storage device, Peabody, that exposes virtual disks. These virtual disks provide mechanisms to: recover any previous state of their sectors and share backend storage to improve cache utilization and reduce the total amount of storage needed. Peabody is exposed as an iSCSI target, and is mountable by any iSCSI compatible initiator. Using our implementation of Peabody, we show that for our workloads, up to 84% of disk sectors written, contain identical content to previously written sectors, motivating...

• Type: Conference
• Year: 2003
• Where: MSS
• Authors: Charles B. Morrey III, Dirk Grunwald
• Keywords: Block Storage Device, MSS 2003, Share Backend Storage, Virtual Disks