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Amazon's Dynamo

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Oct. 3rd, 2007 | 02:06 pm

http://www.allthingsdistributed.com/2007/10/amazons_dynamo.html

"Most of these services only store and retrieve data by primary key
and do not require the complex querying and management functionality
offered by an RDBMS. This excess functionality requires expensive
hardware and highly skilled personnel for its operation, making it a
very inefficient solution. In addition, the available replication
technologies are limited and typically choose consistency over
availability."

1) Most web work is primary key.
2) Its not transactional.
3) Availability is more important then a lost data

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Comments {8}

awfief

(no subject)

from: awfief
date: Oct. 10th, 2007 03:39 am (UTC)
Link

Prefer.

Not require.

The great thing about humans is that we're fault tolerant. Machines are very inflexible. Humans will "understand what you mean" whereas machines choke if a semicolon isn't in the right place.

Meaning that if Amazon.com messes up one order in 100, which is millions of orders per year (!!!) it's actually OK, and cheaper all around to hire someone to apologize (customer service) and fix the problem than it is to have extreme database ACIDity.

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