Introduction

StackOverflow is an amazing site for coding questions. It was created by Joel Spolsky of joelonsoftware.com, Jeff Atwood of codinghorror.com, and some other incredibly smart guys who truly care about user experience. I have been a total fan of SO since it went mainstream and it's now a borderline addiction (you can see my StackOverflow badge on the right sidebar).

The Story

Update 6/21/09: This server is currently under very heavy load (10-200), even with caching plugins enabled. Please bear with me as I try to resolve the situation.

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During my day-to-day activities, I use the Bash shell a lot. My #1 policy is to optimize the most frequently used activities as much as possible, so Iâ€ve compiled these handy bash shortcuts and hints (tested in SecureCRT on Windows and Konsole on Linux). The article only touches on the default bash mode – emacs, not vi. If you havenâ€t specifically assigned your shell mode to vi (set –o vi), youâ€re almost certainly using the emacs mode. Learn these and your shell productivity will skyrocket, I guarantee it.

Update #1: In response to a few people saying this list is too short and “[he] could've added something to it, to atleast make it look longer†(quote from one of Stumbleupon reviewers), I want to clarify something. I deliberately did not include …

Slave delay can be a nightmare. I battle it every day and know plenty of people who curse the serialization problem of replication. For those who are not familiar with it, replication on MySQL slaves runs commands in series – one by one, while the master may run them in parallel. This fact usually causes bottlenecks. Consider these 2 examples:

• Between 1 and 100 UPDATE queries are constantly running on the master in parallel. If the slave IO is only fast enough to handle 50 of them without lagging, as soon as 51 start running, the slaves starts to lag.
• A more common problem is when one query takes an hour to run (let's say, it's an UPDATE with a big WHERE clause that doesn't use an index). In this case, the query runs on the master for an hour, which isn't a big problem because it doesn't block other queries. However, when the query moves over to the slaves, all of them start to lag because it plugs up the single …

I want to get opinions from outside of my daily circle of people on the best server hardware to use for MySQL. I remember from the conference somebody (Pipes?) mentioning a particular Dell server with multiple disk RAID10 that could supposedly be had for about $6k but I completely misplaced the model number (Frank, did you get my email?).

I know that a multi-disk RAID array with a bunch of fast disks (15k RPM?) is probably the most important method of improving performance, followed by the amount of RAM, so I'm trying to find the best combination/balance of the two. However, server prices on the Internet range so much that I don't even know where to begin to tell a good deal from a bad one. I don't think SSDs can play a role here, because we …

Over the last few years there has been a lot of fanfare around open source companies and their liquidation events. Most of the news has been around Sun’s billion dollar acquisition of MySQL or the Citrix acquisition of Xen and even Yahoo’s acquisition of Zimbra. In contrast there was little attention paid to the SourceFire. Actually if you ask most open source users about SourceFire they would probably answer “SourceWho?” If you ask open source users if they have heard of ClamAV or Snort they probably would be able to tell you that they are the leading open source software for virus protection and intrusion detection respectively. Recently, SourceFire has been in the news a …

It seems that open source maven, Matt Asay along with well-known Microsoft blogger Mary Jo Foley have come to the conclusion that Microsoft doesn’t need open source. Asay contends that Microsoft’s open source activity has more to do with regulators than best practices and user collaboration.

Microsoft’s open-source charade is not about customers. It’s about regulators. Until Microsoft can convince U.S. and European regulators that its market power is not as bad as it once was, the company will need to hide behind expressions of openness.

Hence, Microsoft “opens” up its protocols (i.e., lets everyone read but not touch…without forking over cash). It inks “open” interoperability agreements with Novell …

Last year open source analyst Michael Coté of Redmonk coined the term Little Four to describe four up-and-coming open source management vendors and as a foil to the Big Four of systems management.

In the open source space, the 4 names that come up each time ? usually from people I?m talking with even before I say anything ? are: Zenoss, Hyperic, GroundWorks, and openQRM.

…

This week’s Open Source Business Conference was a strange meeting of Enterprise IT users, venture capitalists, and free software entrepreneurs. The opening keynote was delivered by Red Hat’s freshly minted CEO Jim Whitehurst who gave a very modest speech noting that while Red Hat has been a leading open source company they have not necessarily been an open source leader. Whitehurst’s presentation lacked anything especially insightful or noteworthy and he has the advantage of being the new guy so he’s off the hook for anything that might have happened before he took the job.

What is apparent Red Hat’s no longer exciting. They’ve crossed over to …

And on goes my fascination with open source companies and their valuations…

I was reading Stephen O’Grady’s commentary on open source companies and their valuations prompted by the recent acquisition of MySQL by Sun for $1 billion. He quotes Jeff Gould who logically questions whether Sun can make the acquisition pay-off.

Stephen also quotes a piece from Knowledge@Wharton on the myth of market share.

It is a common practice of many companies to focus their attention on grabbing market share from their competitors. But such efforts can actually be detrimental to the firm’s profitability, according to Wharton marketing professor J. Scott …

Released today, administrators of the Alfresco Enterprise Content Management System now have access to a fully supported, enterprise-ready systems management solution with Hyperic HQ for Alfresco. The new Hyperic HQ plugin instantly enables HQ and Alfresco administrators to take full advantage of Hyperic?s powerful management capabilities, including auto-discovery, monitoring, complex alerting and remediation. With today’s release of the Hyperic HQ for Alfresco plugin, Hyperic HQ becomes the only monitoring system to natively support Alfresco deployments on every platform and architecture.

Enterprise Content Management ensures the quick and reliable delivery, accessibility and long-term control of the most important information assets in an enterprise. These all require a strong, reliable architecture,? said John Newton, CTO and co-founder of Alfresco Software Inc. ?Hyperic HQ?s plug …