Project Almanac
| Autor: | Jian Huang, You Zhou, Xiaohao Wang, Chance C. Coats, Yifan Yuan |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
business.industry
Computer science media_common.quotation_subject Reliability (computer networking) 020206 networking & telecommunications 02 engineering and technology computer.software_genre Solid-state drive Data recovery Software Debugging 020204 information systems 0202 electrical engineering electronic engineering information engineering Operating system Malware Overhead (computing) business computer Rollback media_common |
| Zdroj: | EuroSys |
| DOI: | 10.1145/3302424.3303983 |
| Popis: | Preserving the history of storage states is critical to ensuring system reliability and security. It facilitates system functions such as debugging, data recovery, and forensics. Existing software-based approaches like data journaling, logging, and backups not only introduce performance and storage cost, but also are vulnerable to malware attacks, as adversaries can obtain kernel privileges to terminate or destroy them. In this paper, we present Project Almanac, which includes (1) a time-travel solid-state drive (SSD) named TimeSSD that retains a history of storage states in hardware for a window of time, and (2) a toolkit named TimeKits that provides storage-state query and rollback functions. TimeSSD tracks the history of storage states in the hardware device, without relying on explicit backups, by exploiting the property that the flash retains old copies of data when they are updated or deleted. We implement TimeSSD with a programmable SSD and develop TimeKits for several typical system applications. Experiments, with a variety of real-world case studies, demonstrate that TimeSSD can retain all the storage states for eight weeks, with negligible performance overhead, while providing the device-level time-travel property. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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