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Assorted Rants Tagged ‘Database’, page 3:

OLTP. Compiling SQL Bindings.

posted November 28, 2016 by "No Bugs" Hare

Quote:	“If we’re speaking about millions transactions per day over just a few hundred of different SQL statements – compiling those statements a million times (instead of a few hundred times) will be a dramatic waste of resources.”
Another Quote:	“Once upon a time, I observed the largest C++ file in my career – it was a 30’000-line file(!) consisting merely of ODBC bindings (and that was just for 300 or so SQL statements)”
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posted November 21, 2016 by "No Bugs" Hare

Quote:	“99% of reporting requests and 99.9% of analytics is purely historical”
Another Quote:	“Information within the audit table should be sufficient to validate/justify current state”
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posted November 14, 2016 by "No Bugs" Hare

Quote:	“As the RDBMS keeps modifying its tables – the tables gradually degrade”
Another Quote:	“As we can see from the table above – choosing your RDBMS it is not as easy as it might seem.”
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posted November 7, 2016 by "No Bugs" Hare

Quote:	“And after this split of USERS table, the system has achieved perfectly linear scalability.”
Another Quote:	“Start with a simple single-write-connection DB, with reporting running off the same DB”
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posted October 31, 2016 by "No Bugs" Hare

Quote:	“Dealing with transaction isolation is very far from being a picnic”
Another Quote:	“One of such real-world systems was consistently processing over 30M real-world write transactions/day over one single DB connection, supporting ~100K simultaneous players.”
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posted October 24, 2016 by "No Bugs" Hare

Quote:	“in real world, after deployment, most of the changes in DB structure are about widening columns and adding the new ones”
Another Quote:	“For documents and BLOBs, NoSQL is a natural habitat”
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posted October 17, 2016 by "No Bugs" Hare

Quote:	“The worst case of inconsistency happens when row X in database A is modified (by a Client connected to datacenter A), and the same row X in database B is independently modified too (by a Client connected to datacenter B).”
Another Quote:	“One way to avoid reports affecting operational DB, is via creating a read-only replica of our main operational DB – and running our reports off that replica.”
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