Comments for Digital Digressions by Stuart Sierra

Comment on Disk is the New Tape by Functional Relational Programming with Cascalog « Another Word For It

Functional Relational Programming with Cascalog « Another Word For It — Sat, 04 Feb 2012 20:39:31 +0000

[...] In the early aughts, Jeffrey Dean and Sanjay Ghemawat developed the MapReduce programming model at Google to optimize the process of ranking web pages. MapReduce works well for I/O-bound problems where the computation on each record is small but the number of records is large. It specifically addresses the performance characteristics of modern commodity hardware, especially “disk is the new tape.” [...]

Comment on Clojure 2011 Year in Review by Most interesting links of January ’12 « The Holy Java

Most interesting links of January ’12 « The Holy Java — Tue, 31 Jan 2012 22:01:59 +0000

[...] Clojure 2011 Year in Review – a list with important events in the Clojure sphere with links to details – C. 1.3.0, ClojureScript, logic programming with core.logic, clojure-contrib restructuring, birth of 4Clojure and Avout. [...]

Comment on A Million Little Files by net_ma

net_ma — Wed, 18 Jan 2012 15:32:43 +0000

Hi Stuart,

I downloaded your tool. But when I tried to convert a tar file, I got the following error.

The tar file I tried to convert is about 4.5GB in size and contains about 200 files.

Could you tell me what I should do?

Thank you.

java -jar tar-to-seq.jar /home/hduser/sample-archive/2011/a-250.tar a-250.seq
log4j:WARN No appenders could be found for logger (org.apache.hadoop.conf.Configuration).
log4j:WARN Please initialize the log4j system properly.
Exception in thread “main” java.lang.OutOfMemoryError: Java heap space
at java.util.Arrays.copyOf(Arrays.java:2786)
at java.io.ByteArrayOutputStream.write(ByteArrayOutputStream.java:94)
at java.io.DataOutputStream.write(DataOutputStream.java:90)
at org.apache.hadoop.io.compress.CompressorStream.compress(CompressorStream.java:78)
at org.apache.hadoop.io.compress.CompressorStream.write(CompressorStream.java:71)
at java.io.BufferedOutputStream.write(BufferedOutputStream.java:105)
at java.io.DataOutputStream.write(DataOutputStream.java:90)
at org.apache.hadoop.io.SequenceFile$BlockCompressWriter.writeBuffer(SequenceFile.java:1224)
at org.apache.hadoop.io.SequenceFile$BlockCompressWriter.sync(SequenceFile.java:1247)
at org.apache.hadoop.io.SequenceFile$BlockCompressWriter.append(SequenceFile.java:1297)
at org.altlaw.hadoop.TarToSeqFile.execute(TarToSeqFile.java:95)
at org.altlaw.hadoop.TarToSeqFile.main(TarToSeqFile.java:165)

Comment on doto Swing with Clojure by Colbert Sesanker

Colbert Sesanker — Thu, 05 Jan 2012 22:27:30 +0000

This tutorial is very helpful. The function:

(defn func-action [component event & f]
(.addActionListener component
(proxy [java.awt.event.ActionListener] []
(actionPerformed [event] (f))))))

works the same if “event” is passed in as “`event”. The problem is taking multiple functions for f (body in macro version) which works with the macro (save some exceptions). What is the advantage of using a macro, instead of a function, for cases like this?

Comment on Clojure 2011 Year in Review by Timothy Pratley

Timothy Pratley — Thu, 05 Jan 2012 17:41:29 +0000

Thanks for all the great links Stuart; some interesting projects in there.

Comment on Clojure 2011 Year in Review by Christopher Redinger

Christopher Redinger — Wed, 04 Jan 2012 01:06:49 +0000

Also, Mostly λazy (a Clojure podcast) was released.

Comment on Clojure 2011 Year in Review by ClojureScript was a good surprise.

ClojureScript was a good surprise. — Tue, 03 Jan 2012 21:30:24 +0000

[...] Clojure 2011 Year in Review | Digital Digressions by Stuart Sierra [...]

Comment on A Hacker’s Christmas Song by alain

alain — Wed, 28 Dec 2011 09:16:28 +0000

very funny!

Comment on A Hacker’s Christmas Song by Sam Aaron

Sam Aaron — Sat, 24 Dec 2011 19:17:46 +0000

Haha, nice. I’m looking forward to the Overtone rendition of this…

Merry Christmas!

Comment on A Hacker’s Christmas Song by octopusgrabbus

octopusgrabbus — Sat, 24 Dec 2011 17:52:11 +0000

A good rendition. Thanks.