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marcan42's profile
Hector Martin
Hector Martin
Hector Martin
@marcan42

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Hector Martin

@marcan42

If it ain't broke, I'll fix it! I'm porting Linux to Apple Silicon Macs at @AsahiLinux. http://patreon.com/marcan  | http://github.com/sponsors/marcan 

Tokyo, Japan
marcan.st
Joined May 2009

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    1. Hector Martin‏ @marcan42 8 May 2018
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      The first 5 minutes of @euskalencounter #EE26 reservations, at 5x speed. Our servers survived with zero failed requests. Another year, another huge success for #noF5day.pic.twitter.com/wLkun03f5H

      5 replies 47 retweets 111 likes
      Show this thread
    2. Hector Martin‏ @marcan42 8 May 2018
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      The peak at 10:00 CEST is everyone hitting the "Reserve" button all at once. There's a slight lull as people go through the payment gateway, before moving on to seat selection. Seat selection is DB-heavy, hence the extended load on tohru (DB master). 5024 total seats available.pic.twitter.com/LQg1IzHto8

      4 replies 3 retweets 24 likes
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    3. Martin Sundhaug‏ @sundhaug92 8 May 2018
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      Replying to @marcan42

      What sort of machines are you running that on?

      1 reply 0 retweets 0 likes
    4. Hector Martin‏ @marcan42 8 May 2018
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      Replying to @sundhaug92

      Ancient ones. 2 hosts on the left have 2x Xeon E5420 (Harpertown) each (8c8t total per host), right side has 1x E5520 (Nehalem-EP) (4c8c total). We rewrote the entire application and optimized the critical path to make it work out. New hardware is in the pipeline.

      2 replies 0 retweets 1 like
    5. Martin Sundhaug‏ @sundhaug92 8 May 2018
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      Replying to @marcan42

      Nice. How much RAM, storage and what kind of NICs?

      2 replies 0 retweets 0 likes
    6. Martin Sundhaug‏ @sundhaug92 8 May 2018
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      Replying to @sundhaug92 @marcan42

      Sorry in re RAM, didn't get the hires vid from twitter before now. 4 gigs in a server? Ouch

      1 reply 0 retweets 0 likes
    7. Hector Martin‏ @marcan42 8 May 2018
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      Replying to @sundhaug92

      I know, right? They used to be 6+6 though I moved 2G from one to the other in order to maaybe fit in a VM or two, but never got around to it. Newer servers will have way more. The two smaller servers run an Elasticsearch cluster for debug/app logs and... yeah, that chews up RAM.

      1 reply 0 retweets 1 like
    8. Martin Sundhaug‏ @sundhaug92 8 May 2018
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      Replying to @marcan42

      ES on 4 or even 8 gigs? Damn, I almost feel sorry for it

      1 reply 0 retweets 0 likes
    9. Hector Martin‏ @marcan42 8 May 2018
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      Replying to @sundhaug92

      Last night we closed all the indices except the last two months and dropped the Java heap to 800MB or so. Otherwise I'm sure we'd have had a really bad time.

      1 reply 0 retweets 1 like
    10. Martin Sundhaug‏ @sundhaug92 8 May 2018
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      Replying to @marcan42

      Nice. Running ELK or something for logs and such or?

      1 reply 0 retweets 0 likes
      Hector Martin‏ @marcan42 8 May 2018
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      Replying to @sundhaug92

      Hector Martin Retweeted Hector Martin

      EF(ilebeat)K, but yeah. We dump rich JSON logs from the app into a file and tail that. Invaluable debugging aid (and also great for dealing with annoying users). See the third image here:https://twitter.com/marcan42/status/993753850904330240 …

      Hector Martin added,

      Hector Martin @marcan42
      All systems ready #EE26 #noF5day pic.twitter.com/3BzbnUUy1E
      2:40 AM - 8 May 2018
      • 1 Like
      • Martin Sundhaug
      1 reply 0 retweets 1 like
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        1. Martin Sundhaug‏ @sundhaug92 8 May 2018
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          Replying to @marcan42

          Nice. Use that for a dashboard too or?

          1 reply 0 retweets 0 likes
        2. Hector Martin‏ @marcan42 8 May 2018
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          Replying to @sundhaug92

          The main dashboards are Prometheus + Grafana (though we have a couple useful event metric dashboards in Kibana too)

          1 reply 0 retweets 2 likes
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