Enough alliteration already!
I was looking at Regina Obe's excellent piece on how to use psql to do an import on fixed-width data, and thought to myself, "self, how would you do this with fewer copies, just in case you happened across a few hundred gigs of data?"
Here's what I came up with:
Continue reading "psql, Paste, Perl: Pefficiency!" »
Thursday, April 22. 2010
File-driven Include and Exclude for pg_dump
So you're about to start replicating part of a database using Slony, and you'd rather not set up your replicas with all the extra cruft. You've made your list, but what to do with it?
Continue reading "File-driven Include and Exclude for pg_dump" »
Continue reading "File-driven Include and Exclude for pg_dump" »
Wednesday, April 14. 2010
The Cloud Under the Lamp Post
A drunk is under a lamp post. It's late at night, and he is crawling
around on his hands and knees, searching frantically all over the tiny
pool of brilliant light it casts. A passer-by asks him, "what are you
doing?" He answers, "I'm looking for my keys." Pointing out into the
darkness, he continues, "I dropped them over there, but the light's
much better over here."
The joke is an old one, and illustrates an interesting truth about
human psychology.
What does this have to do with The Cloud, you ask?
Read on.
Continue reading "The Cloud Under the Lamp Post" »
around on his hands and knees, searching frantically all over the tiny
pool of brilliant light it casts. A passer-by asks him, "what are you
doing?" He answers, "I'm looking for my keys." Pointing out into the
darkness, he continues, "I dropped them over there, but the light's
much better over here."
The joke is an old one, and illustrates an interesting truth about
human psychology.
What does this have to do with The Cloud, you ask?
Read on.
Continue reading "The Cloud Under the Lamp Post" »
Tuesday, April 6. 2010
Partly Cloudy, with a Very High Chance of FAIL
Everywhere you turn, it's "cloud" this, "cloud" that, "cloud" the other.
Public clouds, private clouds, hybrid
clouds, fluffy clouds...but somewhere in all that billowing haze,
there's an actual use case.
The people who designed cloud computing made certain explicit
trade-offs, some of which have been lost in all the hype. Given those
explicit trade-offs, your application is a candidate for "the cloud" in
general only if it has all of the following characteristics:
- Embarrassingly parallelizable
- Does not have bounded latency requirements
- Needs CPU much more than I/O
- Tolerant to partial data loss
Continue reading "Partly Cloudy, with a Very High Chance of FAIL" »
Public clouds, private clouds, hybrid
clouds, fluffy clouds...but somewhere in all that billowing haze,
there's an actual use case.
The people who designed cloud computing made certain explicit
trade-offs, some of which have been lost in all the hype. Given those
explicit trade-offs, your application is a candidate for "the cloud" in
general only if it has all of the following characteristics:
- Embarrassingly parallelizable
- Does not have bounded latency requirements
- Needs CPU much more than I/O
- Tolerant to partial data loss
Continue reading "Partly Cloudy, with a Very High Chance of FAIL" »
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