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Knowledge Engine (expert system)
While developing backend service, I hit the concept of knowledge engine, specifically PYKE. After spending a few days with it, I would like to write down what I’ve learned so far.what is knowledge engineBasically, you tell the engine a bunch of ru...…
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Increase Ubuntu Disk Space in VM
I hit an issue that sometimes, the disk size of a VM is not large enough after a few weeks development. I thought it is trivial to increase the disk size since I am using a VM. But it turns out that modify the system disk is not easy.I searched on...…
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InnoDB(MySQL) Lock Gotchas
If you are not verify familiar with InnoDB, please go to the basics first:InnoDB(MySQL) Lock TutorialLet’s start by reviewing the following sentence from MySQL Doc A locking read, a UPDATE, or a DELETE generally set record locks on every index re...…
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InnoDB(MySQL) Lock Tutorial
While I was working to solve some deadlock issues in our platform, I found some sql query we are using actually locks much more rows than we expected. I search through internet and couldn’t find any good resource to explain what’s going on. So I r...…
Step By Step
Share ideas and interesting findings in my life.I am a software engineer focus on backend service and architecture design.
Formerly works for Microsoft and now Senior Software Engineer for Skytap.