"Moving forward, our group will look at the possibility of retaining user data in a storage device for a much longer time with lower performance overhead, and applying the time-traveling solid-state drive to wider applications such as systems debugging and digital forensics.1 MozyPro Online Backup Overview and Sales Best Practicesģ Digital Data Continues to Grow Growing by a Factor of 44 One Zettabyte (ZB) = 1 trillion gigabytes ZB ZB Source: IDC Digital Universe Study, sponsored by EMC, May 2010Ĥ The Digital Universe in the Clouds, 2020 By 2020, more than a third of the Digital Universe will either live in or pass through the cloud Total Digital Universe 35 ZB Touched by Cloud 12 ZB Source: IDC Digital Universe Study, sponsored by EMC, May 2010ĥ For SMBs Data IS Their Business 94% of companies suffering from a catastrophic data loss do not survive. "Our research group really enjoys building practical computer systems this is a great practice for our students, they will experience how our research will generate real-world impact," said Huang, an assistant professor of electrical and computer engineering at Illinois. Coats represented the group at the conference. The paper about this research was published at a top-tier system conference, EuroSys, this past spring.
The idea behind their tool has gained interest at an international level. This allows users the option to backup their data onto other systems within the guaranteed time-period if they choose to do so. Despite the dynamic changes to system parameters, their tool guarantees data will be retained for at least three days. To manage this trade-off, Huang and his students built in functionality for the tool to monitor and adjust these parameters dynamically. On the other hand, if the parameters are set to a retention window that is too narrow, users would have a quicker response time, but they may not have all of their backup files saved should a malware attack take place. As the device fills with old file versions, the system takes longer to respond to typical storage requests and performance degrades. If the parameters of their new tool are set to maintain data for too long, old and unnecessary versions will be kept and take up space on the storage device. "Normally a solid-state drive would delete old versions in an effort to erase blocks in advance, but because our drive is keeping the old versions intentionally, it may have to move the old versions before writing new ones."Ĭoats described this as a trade-off between retention duration and storage performance.
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"When you want to write new data, it has to be saved to a free block, or block that has already been erased," said Coats. The tool would also help in the case of a user accidentally deleting one of their own files.
If there is an attack, the tool discussed in the paper can be used to revert to a previous version of the file. Those old versions are the key to thwarting ransomware attacks. When a file is modified on the computer, rather than getting rid of the old file version immediately, the solid-state drive saves the updated version to a new location. The flash-based, solid-state drives Coats mentioned are part of the storage system in most computers. "The motivation was a class of malware called ransomware, where hackers will take your files, encrypt them, delete the unencrypted files and then demand money to give the files back." "The paper explains how we leverage properties of flash-based storage that currently exist in most laptops, desktops, mobiles, and even IoT devices" said Coats, a graduate student in electrical and computer engineering (ECE).
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