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This is a last-write-wins Riak application running across five nodes. Clients are subject to a perfect global write lock: no two clients will ever change a key at the same time. "." means 100 writes, "!" means a single failed write. The string of !!!s in the middle, gradually decreasing in density, is the effect of a network partition followed b…
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user=> (run (apps (comp locking-app riak-lww-sloppy-quorum-app))) | |
.......!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!.!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.........Hit enter when ready to collect results. | |
#_=> | |
Writes completed in 178.326 seconds | |
2000 total | |
1841 acknowledged | |
1246 survivors | |
599 acknowledged writes lost! (╯°□°)╯︵ ┻━┻ | |
505 506 510 511 515 516 ... 1985 1986 1990 1991 1995 1996 | |
4 unacknowledged writes found! ヽ(´ー`)ノ | |
(242 384 419 604) | |
0.9205 ack rate | |
0.32536665 loss rate | |
0.0021727323 unacknowledged but successful rate |
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(defn riak-lww-sloppy-quorum-app | |
[opts] | |
(riak-app (merge {:read {:r Quora/QUORUM} | |
:write {:w Quora/QUORUM | |
:dw Quora/QUORUM} | |
:bucket-opts {:allow-siblings false | |
:n-val 3}} | |
opts))) |
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