Dear all,

I have been attempting to use Atlas to launch traceroute measurements recently. Initially, I used ripe.atlas.cousteau to run the measurements in batches, keeping the total number under 10,000 to avoid exceeding the measurement limit. However, only 10% of the measurements returned successful results, while the other 90% showed the status "scheduling denied."

Next, I tried launching only 12 measurements in batch, where each measurement contained one traceroute from a specific probe to a designated IPv4 destination. Out of these, 4 succeeded and the other 8 showed the status "specified". Following that, I launched the 12 measurements one by one with 2-second intervals, resulting in a success rate of 6 out of 12. However, when I increased the interval to 3 seconds, the success rate dropped to 4 out of 12.

Interestingly, when I created the same measurements for the designated probes and destinations through the web interface, all of them were successful.

Below is the Python code I used to launch the measurements:

from ripe.atlas.cousteau import (
  Traceroute,
  AtlasSource,
  AtlasRequest,
  AtlasCreateRequest,
  AtlasResultsRequest,
  AtlasLatestRequest,
  ProbeRequest  
)

    traceroute = Traceroute(af=4, target=dstip, description="traceroute subpref ip {} from {} {}".format(dstip, probe_type, probe_value), protocol='ICMP')
    if probe_type == 'asn': probe_value = int(probe_value)
    source = AtlasSource(type=probe_type, value=probe_value, requested=1, tags={"include": ["system-ipv4-capable"]})
   
    _key = ATLAS_API_KEY_2
    for _ in range(2):
        atlas_request = AtlasCreateRequest(
            start_time=datetime.utcnow() + timedelta(random.randint(0, 1)),
            key=_key,
            measurements=[traceroute],
            sources=[source],
            is_oneoff=True
        )    
        (is_success, response) = atlas_request.create()
        if is_success:
            print('create_task', dstip, is_success, response)
            msm_id = response['measurements'][0]
            return

Could you kindly let me know if there might be an issue with my approach or provide any advice on how to improve this process? I would greatly appreciate any guidance.

Thank you very much!

Best regards,
Sun Letong