Blog

News and views from the Clarksys crew on all things cloud, cybersecurity, and scale.

How big is your mysql server?

This is from one of my customer's mysql server: Number of rows inserted 8669554, updated 286107, deleted 46900, read 116812522 While that is impressive on the surface what if I told you that was for less than two hours? Yes that's right 10 million inserts in two hours, or 1,400…

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Utility Error Blamed for L.A. Blackout

See: Utility Error Blamed for L.A. Blackout – Yahoo! News Hundreds of thousands of people were affected by the resulting power surge and outages, which were reported from downtown west to the Pacific Coast and north into the San Fernando Valley.

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What’s Your Uptime?

My friend sent this to me before he rebooted the server. We installed FreeBSD 4.2 and Postfix on this computer ~4 years ago to use as an SMTP gateway for the application servers. The box was receintly rebooted after an online upgrade to FreeBSD 4.11. smtp01# uptime 3:43PM up…

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Safely Copy Directories in Unix

I use this a lot when I need/want to mount a new partition into a directory location that I have been previously been using (i.e. Vinum configuration in FreeBSD). What’s great for me is that it will copy file permissions over properly – and better yet, if it fails partway…

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Four Boy Scout Leaders Die in Va. Accident

Four adult Boy Scout leaders from Alaska were killed Monday afternoon in an electrical accident during the opening day of the organization’s 2005 Jamboree. Going to the National Jamboree when I was a young Scout was one of the most amazing, memorable experiances that I have ever had in life.

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Finally Migrating to PowerDNS

After plenty of procrastinating I am finally putting the final touches on a migration to PowerDNS. Over the past years I have experimented and run a wide variety of name servers. First BIND (I still have my BIND book on the bookshelf), then djbdns (aka tinydns),…

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Microsoft Exchange 500 Syntax Error

If you are reading this post then chances are you have received an error message that looks like this There was a SMTP communication problem with the recipient’s email server. Please contact your system administrator. from an email user that tried to email a message to your organization. More specifically,…

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Upgrading Perl on FreeBSD

I discovered that I needed to upgrade my perl installation on my FreeBSD boxes from 5.6.2 to 5.8.2 for an application that I was interested in running. However there are two issues with this: Perl 5.6 is in ports as lang/perl and Perl 5.8 is lang/perl5.8, so a portupgrade on…

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Backup/download IOS image

Here is an easy example of how to backup/download an IOS image from a Cisco router. Need to make backup image? Or need to download image? Try the following: 1) Backup image to TFTP server Router>enable Router#copy flash:{your IOS image filename} tftp://{TFTP server IP address} 2)…

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Build vs. Buy

A couple of years ago I was involved in a fairly large CRM deployment for a company I worked for. My step-brother was working for Siebel at the time and had some very wise words of wisdom for me… The failure rate for CRM deployments increases proportional to the amount…

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