Mark's Notebook

My sketchbook, code and other things I'm working on.

Mar 20, 2010 - 1 minute read - Comments - Personal News

Snow on the Redbuds (again)

Snow on the Redbuds Here it is March, its already spring. The robins are back, every morning the birds sing. Oklahoma weather is strange, it can rain with the sun up high. But I love it when snow falls from the sky. When I got up this morning, it was cold and my window was bright. There was snow on the Redbuds. It fell through the night. Mark Grennan

Dec 1, 2009 - 1 minute read - Comments - What I learned today.

MySQL Table Caching

Too much of a good thing… I have had a lot of people asking me about MySQL lately so I thought is was time to share something I learned.� Too much caching space in MySQL can be a bad thing. You would thing the more you can stuff your entire database into memory the better off you would be and the faster your system would work.� That is not completely true.

Oct 8, 2009 - 2 minute read - Comments - Information Security

Simple Disaster Recovery Backup for VMware

Some time the simple scripts are the best. Disaster Recovery (DR) backups do not have to be made every day.  At some places I’ve worked we made DR backups as little as one a year.  

DR backups contain everything. You copy the entire envirement so you can buy new hardware and restore the operation of the needed services as quickly as posible without installing from scratch.  Backups on tape are great but how can you restore the data if you don’t have a tape server with the right OS and software in place ready to do the restore?  VMware makes this eazy because it uses files as disks and you can make point in time snapshots.

Jul 3, 2009 - 2 minute read - Comments - Information Security

Yubikey 2.0

�I have received my Yubikey 2.0 from �I have received my Yubikey 2.0 from and it is nice. �The biggest new feature is it has two internal configurations. Each can be programs with different functions.� With Version 1 of the Yubikey you could program it to be a static password or reprogram it with your own AES-128 key.� The static password is nice but much less secure and if you update the AES key you can’t use it with Yubico’s authintication server any longer.

Jul 1, 2009 - 1 minute read - Comments - Mark's Personal News

Boo

I’ve found a great service with a very bad name BOO .� Boo is a audio / Pic publishing service for the iPhone.� Think of it as a audio Twitter / TwitPic thing. I’ve been doing podcast for some time.� This will make quick podcasts simple.� Check out “Mark On The World” at http://audioboo.fm/profile/MarkOnTheWorld. Enjoy �

Apr 27, 2009 - 2 minute read - Comments - Personal News

Traci is Mad

It’s odd how you can know someone all there life and still not quite understand them. I think I have learned something about my doughter Traci. I think she is mad at me because I’m old. I never know why, but some times Traci gets in these moods and gives me a hard time, says something mean or gives me this bad, sad, bad. She did it again tonight.� We watched the movie Marley & Me this evening.