Running an API 24/365

•

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How to keep a popular API up an running 24 hours a day, 365 days a year. Presentation by Federico Hernandez, Västtrafik from Nordic APIs Copenhagen in May 2013.

Technology Education

Write program that do
one thing and
do it well
Unix philosophy

Doug McIlroy

$ curl localhost:5432/cmi/status

{

"nodeTime": "2013-05-20T13:41:52",

"activeSubscriptions": 892,

"totalNumberOfSubscribers": 1019,

"totalNumberOfSubscriptions": 1801,

"sentMessagesPerMinute": 0,

"tsConnections": [

"HafasServerClient [be1/123.456.789.123:40301], managed connections: 232",

"HafasServerClient [be1/123.456.789.123:40302], managed connections: 251",

"HafasServerClient [be2/123.456.789.125:40301], managed connections: 234",

"HafasServerClient [be2/123.456.789.125:40302], managed connections: 212"

]

}

Statistik för Mon 2014-05-05
============================
!
Antal sökningar
---------------
Searches:  1203498
!
!
Klienter
--------
WEB:      100323  (8.336%)
IPHONE:   611811  (50.836%)
IPAD:     1519    (0.126%)
ANDROID:  235191  (19.542%)
REST:     251549  (20.901%) [internal usage] (external ca. 800000)
XHTML:    3105    (0.258%)
!
!
Typ av förfrågningar
--------------------
XMLCON (till/från eller till och från address):   525031   (43.625%)
XMLSTATIONBOARD (nästa tur):                      289010   (24.014%)
XMLCON-BASIC (till och från hållplats):           200035   (16.621%)
XMLLOCATING (sökning med gps från mobilen):       163346   (13.573%)
XMLJOURNEY:                                       13547    (1.126%)
XMLTARIFF (prisförfrågning):                      6091     (0.506%)
XMLGIS:                                           5778     (0.480%)
XMLSIMPLEHANDLESTRING (SMS):                      660      (0.055%)

Svarstider för beräkningar
--------------------------
0.00s:  937282   (77.880%)
0.01s:  52655    (4.375%)
0.02s:  36363    (3.021%)
0.03s:  12238    (1.017%)
0.04s:  19583    (1.627%)
0.05s:  12027    (0.999%)
0.06s:  9823     (0.816%)
0.07s:  8682     (0.721%)
0.08s:  8591     (0.714%)
0.09s:  9058     (0.753%)
---
0.0s:   1106302  (91.924%)
0.1s:   32175    (2.673%)
0.2s:   32400    (2.692%)
0.3s:   13499    (1.122%)
0.4s:   6921     (0.575%)
0.5s:   3412     (0.284%)
0.6s:   2327     (0.193%)
0.7s:   1688     (0.140%)
0.8s:   1047     (0.087%)
0.9s:   706      (0.059%)
---
0s:     1200477  (99.749%)
1s:     2481     (0.206%)
2s:     291      (0.024%)
3s:     38       (0.003%)
4s:     15       (0.001%)
5s:     166      (0.014%)
6s:     5        (0.000%)
7s:     1        (0.000%)

Eric Raymond’s 17 Unix
Rules
...!
Rule of Modularity!
Rule of Composition!
Rule of Separation!
Rule of Simplicity!
Rule of Parsimony!
Rule of Robustness!
...

Federico Hernandez!
fh@vasttraﬁk.se
f@ederi.co!
@feddeco
@vasttraﬁkapi

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Running an API 24/365

2. Federico Hernandez

4. 24/7

5. 24/7/365

6. 24/7/365

7. 24/365

8. 24/365 ! (24/7/52)

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13. WEB ??? 000 APP ??? 000 API ??? 000

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16. Write program that do one thing and do it well Unix philosophy Doug McIlroy

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41. $ curl localhost:5432/cmi/status { "nodeTime": "2013-05-20T13:41:52", "activeSubscriptions": 892, "totalNumberOfSubscribers": 1019, "totalNumberOfSubscriptions": 1801, "sentMessagesPerMinute": 0, "tsConnections": [ "HafasServerClient [be1/123.456.789.123:40301], managed connections: 232", "HafasServerClient [be1/123.456.789.123:40302], managed connections: 251", "HafasServerClient [be2/123.456.789.125:40301], managed connections: 234", "HafasServerClient [be2/123.456.789.125:40302], managed connections: 212" ] }

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45. Statistik för Mon 2014-05-05 ============================ ! Antal sökningar --------------- Searches: 1203498 ! ! Klienter -------- WEB: 100323 (8.336%) IPHONE: 611811 (50.836%) IPAD: 1519 (0.126%) ANDROID: 235191 (19.542%) REST: 251549 (20.901%) [internal usage] (external ca. 800000) XHTML: 3105 (0.258%) ! ! Typ av förfrågningar -------------------- XMLCON (till/från eller till och från address): 525031 (43.625%) XMLSTATIONBOARD (nästa tur): 289010 (24.014%) XMLCON-BASIC (till och från hållplats): 200035 (16.621%) XMLLOCATING (sökning med gps från mobilen): 163346 (13.573%) XMLJOURNEY: 13547 (1.126%) XMLTARIFF (prisförfrågning): 6091 (0.506%) XMLGIS: 5778 (0.480%) XMLSIMPLEHANDLESTRING (SMS): 660 (0.055%)

46. Svarstider för beräkningar -------------------------- 0.00s: 937282 (77.880%) 0.01s: 52655 (4.375%) 0.02s: 36363 (3.021%) 0.03s: 12238 (1.017%) 0.04s: 19583 (1.627%) 0.05s: 12027 (0.999%) 0.06s: 9823 (0.816%) 0.07s: 8682 (0.721%) 0.08s: 8591 (0.714%) 0.09s: 9058 (0.753%) --- 0.0s: 1106302 (91.924%) 0.1s: 32175 (2.673%) 0.2s: 32400 (2.692%) 0.3s: 13499 (1.122%) 0.4s: 6921 (0.575%) 0.5s: 3412 (0.284%) 0.6s: 2327 (0.193%) 0.7s: 1688 (0.140%) 0.8s: 1047 (0.087%) 0.9s: 706 (0.059%) --- 0s: 1200477 (99.749%) 1s: 2481 (0.206%) 2s: 291 (0.024%) 3s: 38 (0.003%) 4s: 15 (0.001%) 5s: 166 (0.014%) 6s: 5 (0.000%) 7s: 1 (0.000%)

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53. Eric Raymond’s 17 Unix Rules ...! Rule of Modularity! Rule of Composition! Rule of Separation! Rule of Simplicity! Rule of Parsimony! Rule of Robustness! ...

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58. Federico Hernandez! fh@vasttraﬁk.se f@ederi.co! @feddeco @vasttraﬁkapi

Running an API 24/365

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