From 6cd3f9af5303c97e365faaf535e6e0931009ee4a Mon Sep 17 00:00:00 2001
From: Csaba Kiraly <csaba.kiraly@gmail.com>
Date: Tue, 5 Sep 2023 09:54:45 +0200
Subject: [PATCH] adding sampling jitter

This is one way of simulating that nodes don't start all
their sampling operations together.

Signed-off-by: Csaba Kiraly <csaba.kiraly@gmail.com>
---
 das.nim | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/das.nim b/das.nim
index 74437e9..2e3b4e4 100644
--- a/das.nim
+++ b/das.nim
@@ -102,6 +102,7 @@ when isMainModule:
       samplesize = 3
       sampling_timeout = 5.seconds
       samplethreshold = samplesize
+      sampling_jitter = 50000 # in microseconds
       delay_init = 60.minutes
       upload_timeout = 4.seconds
       sampling_delay = 4.seconds
@@ -160,7 +161,7 @@ when isMainModule:
       let sample = sample(0 ..< blocksize, samplesize)
       debug "starting sampling", by = n, sample
       for s in sample:
-        let fut = n.sampleOne(segmentIDs[s])
+        let fut = n.sampleOne(segmentIDs[s], rand(0 .. sampling_jitter).microseconds)
         futs.add(fut)
       return (sample, futs)