Posts by Sheeri Cabral

Liveblogging: Edward Screven State of the Dolphin Keynote

Oracle invested heavily in open source even before the acquisition. Linux (Oracle Unbreakable Linux = Oracle Enterprise Linux = OEL). Clustering, data integrity, storage validation, asynchronous I/O, virtualiation technology that has been accepted back into the Linux kernel. They have enhanced Xen, in order to make a good Oracle VM server for x86. With Sun, they now have VirtualBox. In the 3 years of OEL, they have over 4,500 companies.

Achievements of Women in Technology

Today is Ada Lovelace day, a day to “draw attention to achievements of women in technology.” So here I am, drawing some attention :) All the names contain links to learn more (mostly Wikipedia links), so if you are so inclined to do so, you can learn more (you could start at Wikipedia’s article on women in computing). Perhaps you will realize that there are lots of women in technology already, more than you first thought. That being said, this is by no means a comprehensive list.

Liveblogging at Confoo: [not just] PHP Performance by Rasmus Lerdorf

Before you do anything else install an opcode cache like APC. Wordpress really likes this type of caching, see this slide for the results. Set the timezone, to make sure conversions aren’t being done all the time. Make sure you are cpu-bound, NOT I/O bound. Otherwise, speed up the I/O. Then strace your webserver processs. There are common config issues that you can spot in your strace code. grep for ENOENT which shows you “No such file or directory” errors.

Liveblogging at confoo: Can Twitter make money?

Why is social media and social networking essential to you and your business? (because it will drive sales, but there’s very few analytics for ROI on social networking and social media) Relying on advertising is no longer working for print newspapers and television. So why do we think it will work on internet media?

Liveblogging: HTML5 – Confoo Keynote

What is confoo? It is the sequel to the PHP Quebéc Conference (2003 – 2009). This year PHP Quebec decided to team up with Montreal-Python, W3Quebéc and OWASP Montréal to produce confoo. And now, on to Mark Pilgrim of Google speaking on HTML5.

International Women’s Day

Start planning your blog posts for Ada Lovelace day now (March 24th) To that end, I would like to point out all the women currently in science and tech fields that I admire and think are doing great things. I think it would be great if everyone, male or female, made a list like this

Database tuning: ratio vs. rate

If I told you that your database had a ratio of temporary tables written to disk of 20%, you might think “aha, my database is slow because of a lot of file I/O caused by writing temporary tables to disk!”. However, that 20% ratio may actually mean a rate of 2 per hour — which is most likely not causing excessive I/O. To get a sense of this concept, and also how mysqltuner works, I will show the lines from the mysqltuner default configuration that deal with temporary tables written to disk.

Applying binary logs without adding to the binary log

Applying binary logs to a MySQL instance is not particularly difficult, using the mysqlbinlog command line utility. Turning off binary logging for a session is not difficult, from the MySQL commandline, if you authenticate as a user with the SUPER privilege.sometimes you want to apply binary logs to a MySQL instance, without having those changes applied to the binary logs themselves. One option is to restart the server binary logging disabled, and after the load is finished, restart the server with binary logging re-enabled. This is not always possible nor desirable, so there’s a better way, that works in at least versions 4.1 and up

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