What Is Lurking in Your Backups?
What Is Lurking in Your Backups?
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DOI:
10.1007/978-3-030-78120-0_26
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Wagner, James
中科院分区:
文献类型:
--
作者:
Lenard, Ben;Rasin, Alexander;Scope, Nick;Wagner, James
Best practices in data management and privacy mandate that old data must be irreversibly destroyed. However, due to performance optimization reasons, old (deleted or updated) data is not immediately purged from active database storage. Database backups that typically work by backing up table and index pages (rather than logical rows) greatly exacerbate the privacy problem of the old surviving data. Copying such deleted data into backups ensures that unknown quantities of old data can be stored indefinitely.In this paper, we quantify the amount of deleted data retained in backups by four major representative databases, comparing the default behavior versus an explicit defrag operation. We review the defrag options available in these databases and discuss the impact they have on eliminating old data from backups. We demonstrate that each database has a defrag mechanism that can eliminate most of old deleted data (although in Oracle pre-update content may survive defrag). Finally, we outline the factors that organizations should consider when deciding whether to apply defrag prior to executing their backups.
DOI:
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发表时间:
2016
期刊:
Digital Investigation. The International Journal of Digital Forensics and Incident Response
影响因子:
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作者:
J. Wagner;A. Rasin;Jonathan Grier
通讯作者:
Jonathan Grier
DOI:
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发表时间:
2015
期刊:
Digital Investigation. The International Journal of Digital Forensics and Incident Response
影响因子:
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作者:
J. Wagner;A. Rasin;Jonathan Grier
通讯作者:
Jonathan Grier
DOI:
10.1016/j.ijinfomgt.2017.05.015
发表时间:
2017
期刊:
Int. J. Inf. Manag.
影响因子:
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作者:
V. Lozupone
通讯作者:
V. Lozupone