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Topics in post-mortem debugging 22 Aug 2013 | 10:00 am
A couple of weeks ago, Joyent hosted A Midsummer Night’s Systems meetup, a fun event with talks ranging from Node.js fatwas to big data for Mario Kart 64. My colleague Jeremy Jones had recently done s...
Memory Leak (and Growth) Flame Graphs 16 Aug 2013 | 08:31 pm
Memory Leak Memory Flame Graph Your application memory usage is steadily growing, and you are racing against time to fix it. This could either be memory growth due to a misconfig, or a memory l...
Kartlytics: Applying Big Data Analytics to Mario Kart 64 8 Aug 2013 | 07:28 pm
This post also appears on the Joyeur blog. If you missed it, Joyent recently launched Manta, a web-facing object store with compute as a first-class operation. Manta makes it easy to crunch on Big Da...
Serving up disaster porn with Manta 24 Jul 2013 | 05:05 am
Years ago, Ben Fried liberated me by giving me the words to describe myself: I am a disaster porn addict. The sordid specifics of my addiction would surely shock the unafflicted: there are well-thumbe...
What the Mean Really Means 12 Jul 2013 | 10:07 pm
When analyzing response time, or latency, you need much more information than an average provides. The average, commonly the arithmetic mean, shows the index of central tendency. But, as I found in ea...
Modes and Modality 9 Jul 2013 | 12:59 am
It is a truth universally acknowledged that the average is the index of central tendency. But what if the tendency isn’t central? I’ve worked many performance issues where the latency or response tim...
Fault tolerance in Manta 3 Jul 2013 | 08:04 pm
Since launching Manta last week, we’ve seen a lot of excitement. Thoughtful readers quickly got to burning questions about the system’s fault tolerance: what happens when backend Manta components go d...
Detecting Outliers 1 Jul 2013 | 10:43 pm
In computer performance, we’re especially concerned about latency outliers: very slow database queries, application requests, disk I/O, etc. The term “outlier” is subjective: there is no rigid mathema...
Manta: Unix Meets Map Reduce 25 Jun 2013 | 06:32 pm
Today Joyent launched Manta: an object store built upon ZFS and Zones, the SmartOS platform, and with a familiar Unix interface as the API. This supports compute jobs such as map reduce, and provides ...
Manta: From revelation to product 25 Jun 2013 | 06:16 pm
If you haven’t seen it, you should read Mark’s blog entry on Manta, the revolutionary new object storage service we announced today that features in situ compute. The idea for this is beautifully simp...
