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Displaying posts with tag: sun (reset)

451 CAOS Links 2010.06.29
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Elephants on parade: Hadoop goes mainstream. And more.

Follow 451 CAOS Links live @caostheory on Twitter and Identi.ca
“Tracking the open source news wires, so you don’t have to.”

Elephants on parade
# Cloudera launched v3 of its Distribution for Hadoop and released v1 of Cloudera Enterprise.

# Karmasphere released new Professional and Analyst Editions of its Hadoop development and deployment studio.

# Talend announced that its Integration Suite now offers native support for Hadoop.

# Yahoo announced the beta release of Hadoop with Security



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"Alternate methods for finding problem query.": chapter 5 of "Methods for searching errors in SQL application" just published
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Translation of chapter 5 which describes alternate methods for searching problem query just published. It starts like:



Chapter 5. Alternate methods for finding problem query.


I already wrote about using of general query log requires resources.
Part of the problem can be solved if use new feature of MySQL 5.1:
online logging which allows to turn general query log to on or to off
without stopping the MySQL server.


Unfortunately this doesn't always work: you can have old
version of MySQL server which has not such a feature, general query log
can contain very large amount of information, so you can just miss the
problem in thousands of correct queries, you can have some other own
reason.



But what to do if you can not use general query log?


One of




















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Translation of Chapter 4. Miscellaneous. of "Methods for searching errors in SQL application" just published
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This chapter starts as:



Chapter 4. Miscellaneous.


There are cases when wrong output is just symptom of wrong input made before.



For example, you start to receive wrong data at particular step of the
scenario. After analysis of the SELECT query (or queries) is clear what
queries are correct and return exactly same data which exists in the
table (or tables).



This means wrong data was inserted at the earlier step.



How to know when it happened?


Start from the step of the scenario which exists just before
step which does output, check every query as was described in earlier
chapters. If everything works correctly, examine earlier step, repeat
until you find the error.



We can examine example with

























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MySQL University: Securich - Security Plugin for MySQL (rerun)
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This Thursday (June 10th, 14:00 UTC), Darren Cassar will rerun his February 25 presentation of Securich - Security Plugin for MySQL. (Recording of the session failed in February; hopefully it will succeed this time.) According to Darren, the author of the plugin, Securich is an incredibly handy and versatile tool for managing user privileges on MySQL through the use of roles. It basically makes granting and revoking rights a piece of cake, not to mention added security it provides through password expiry and password history, the customization level it permits, the fact that it runs on any MySQL 5.0 or later and it's easily deployable on any official

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MySQL University: Securich - Security Plugin for MySQL (rerun)
Employee +0 Vote Up -0Vote Down

This Thursday (June 10th, 14:00 UTC), Darren Cassar will rerun his February 25 presentation of Securich - Security Plugin for MySQL. (Recording of the session failed in February; hopefully it will succeed this time.) According to Darren, the author of the plugin, Securich is an incredibly handy and versatile tool for managing user privileges on MySQL through the use of roles. It basically makes granting and revoking rights a piece of cake, not to mention added security it provides through password expiry and password history, the customization level it permits, the fact that it runs on any MySQL 5.0 or later and it's easily deployable on any

  [Read more...]
MySQL University: Securich - Security Plugin for MySQL (rerun)
Employee +0 Vote Up -0Vote Down

This Thursday (June 10th, 14:00 UTC), Darren Cassar will rerun his February 25 presentation of Securich - Security Plugin for MySQL. (Recording of the session failed in February; hopefully it will succeed this time.) According to Darren, the author of the plugin, Securich is an incredibly handy and versatile tool for managing user privileges on MySQL through the use of roles. It basically makes granting and revoking rights a piece of cake, not to mention added security it provides through password expiry and password history, the customization level it permits, the fact that it runs on any MySQL 5.0 or later and it's easily deployable on any

  [Read more...]
Chapter 3 of "Methods for searching errors in SQL application" has been published
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Translation of "Chapter 3. Wrong data in database or what to do with problem DML query." of  "Methods for searching errors in SQL application" just published.


 This is short chapter which discuss single method of dealing with mysterious DML query.


Chapter 3. Wrong data in database or what to do with problem DML query.



Problems with wrong data happens not only with SELECT queries like
cases we discussed in chapter 2, but in cases of querires which modify
data: DML queries.



Lets discuss example below




mysql> create table t1(f1 int);



Query OK, 0 rows affected (0.01 sec)























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Software patents are a bad legacy to leave behind
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Glyn Moody has an interesting piece on Why Patents are Like Black Holes where he looks at the situation when a large patent holder goes bankrupt - or is about to. His point is that even if a company otherwise can go out of business cleanly, the patents often remain as a piece of "IPR" that can come back and haunt us like a zombie.

Also Matt Asay recently weighed in on the subject:

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MySQL University: New Features in Connector/NET 6.3
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This Thursday (June 3rd, 14:00 UTC), Reggie Burnett, head of Connector/NET development, will present the New Features in Connector/NET 6.3.

For MySQL University sessions, point your browser to this page. You need a browser with a working Flash plugin. You may register for a Dimdim account, but you don't have to. (Dimdim is the conferencing system we're using for MySQL University sessions. It provides integrated voice streaming, chat, whiteboard, session recording, and more.)

MySQL University is a free educational online program for

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MySQL University: New Features in Connector/NET 6.3
Employee +0 Vote Up -0Vote Down

This Thursday (June 3rd, 14:00 UTC), Reggie Burnett, head of Connector/NET development, will present the New Features in Connector/NET 6.3.

For MySQL University sessions, point your browser to this page. You need a browser with a working Flash plugin. You may register for a Dimdim account, but you don't have to. (Dimdim is the conferencing system we're using for MySQL University sessions. It provides integrated voice streaming, chat, whiteboard, session recording, and more.)

MySQL University is a free educational online program for

  [Read more...]
10 Newer Entries Showing entries 61 to 70 of 930 10 Older Entries

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