Tuesday, January 01, 2013

Data Access Speed: HDD vs RAM

In this interview it was mentioned that
sequential reading from HDD could be faster than random access to memory.

YOW! 2012: Marko Rodriguez - Graph Systems and Databases | Going Deep | Channel 9:
Gremlin graph traversal language

Exploring Wikipedia Graph

The claim about data access speed is interesting, may be worth checking.
Forum discussionArticle at ACM Queue



"Write-Only" data systems have advantage of sequential access to data.
One of such system, Datomic, keeps creating index blocks for fast access,
but original data are write-only.
In similar way, Google's Big Table keeps creating indexes for fast access to subsets of data...


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