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[ez-toc] Introduction Summary Now that we talked about happened before events, we can talk about lamport clocks Lamport’s Logical Clock Summary A logical clock that each process has and that clock monotonically increases as events unfold. For example, if event A happens before event B, then the event A’s clock (or counter value) must be…
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Graduate School Wrote up my analysis on the various barrier synchronization algorithms that I implemented. I had to describe the various algorithms (e.g. dissemination barrier, tournament barrier, centralized sense reversal barrier) for the documentation that will accompany our code and experiments as part of Project 2 for advanced operating systems. Finished watching lectures on Active…
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Before starting project 2 (for my advanced operating systems course), I took a snapshot of my understanding of synchronization barriers. In retrospect, I’m glad I took 10 minutes out of my day to jot down what I did (and did not) know because now, I get a clearer pictur eof what I learned. Overall, I…
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I’m thrilled to be “off call” in about 4.5 hours, no longer tied to my pager and no longer anxious from possibility of waking up to the sound of nasty alarm. Really, the anxiety revolves around the randomness and the unknown of being paged. What’s also variable is the length of these engagements: sometimes the…
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I’m shattered. This past week really broke me, the numerous 3:30 AM wake ups and the long operational issues running until 09:30 PM (past the time I’d like to be asleep). To recover from this taxing work week, I’m taking next Thursday and Friday off. Despite the rough week, I’m relieved that my wife and…
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This week, my cumulative “write every day” streak has been broken (almost 2 months of consistent writing every day), thanks to one of the roughest weeks at work. I normally start every day off with some light blogging — even if its for 5 or 10 minutes — but almost every day this week I…
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In yesterday’s post, I had mentioned that I was paged out of bed at around 03:30 AM because of an operational issue. And for the rest of the day, my mind was fried and I practically looked like a zombie the rest of the day, my word constantly slurred. On top of all that, a…
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Sadly I didn’t get to start the day off with writing, my morning routine, since my phone paged me out of bed at 3 AM due to an operational issue from work that lasted about about three hours. Because of this, I know that I’ll feel “off” the rest of the day given that I’ve…
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In the conclusion of Time, Clocks, and the Ordering of Events in a Distributed System, Leslie Lamport states that: the concept of “happening before” defines an invariant partial ordering of the events in a distributed multiprocess system. According to a stackoverflow post, Jacob Baskin states that an invariant is a property of the program state…
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Below are a couple photos of farm house doors that I think have good taste. I’m thinking of adding one of these type of doors to my new home office and wanted to share a couple of styles that I thought were both warm and aesthetically pleasing, two qualities I’m aiming to bring out of…