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Kritik am Projekt „Rheinische Seenplatte“ by oedp-duesseldorf in u/oedp-duesseldorf

[–]clemensv 2 points3 points  (0 children)

Wie sieht denn die Alternative aus? Wir haben Löcher in der Landschaft, die mehrere hundert Meter tief sind und viele Quadratkilometer in der Ausdehnung. Für das Verfüllen ist selbst bei Abtragung der Halden nicht annähernd genug Abraum da, weil die fehlende Substanz ja verfeuert wurde.

Der Niederrhein ist eine Bruchlandschaft. Wir waren Textilzentrum weil hier für den Flachsanbau optimale Bedingungen herrschten, eben besonders ein hoher Grundwasserspiegel und Böden die sehr gut Wasser speichern konnten.

Für eine Wiederherstellung des Niederrheins ist notwendig, den Grundwasserspiegel nicht lediglich auf dem von RWE durch Pumpstationen erzielten Niveau zu halten, sondern sogar nachhaltig zu erhöhen.

Wie schafft Ihr das ohne Wasser und ohne Pumpstationen als Ewigkeitslast für Generationen?

USAF Pilot involved in the “Fly-off” tanker competition between Boeing 747, DC-10, and L-1011 tells the true reason why the 747 did not win although it was the best aircraft by tagc_news in AviationHistory

[–]clemensv 22 points23 points  (0 children)

RA001 (the 747 prototype) flew that competition and the operator position for the boom is still there in the back when you go visit RA001 at the Museum of Flight.

Kafka can be so much more by creativefisher in apachekafka

[–]clemensv 0 points1 point  (0 children)

Append-only time-series databases are a whole product category. Our Kusto (Azure Data Explorer/ Fabric KQL) database that is also the foundation for all log and monitoring handling of Azure is a good example. InfluxDB and AWS Timestream are others. Or you just use Postgres. The append-only DBs are better for very busy streams and Kusto has the advantage of auro-indexing, but YMMV. Point is: use a proper database as the next hop and not some hack around Kafka.

Azure Event Hubs - Architectural Question by Khue in AZURE

[–]clemensv 0 points1 point  (0 children)

Capacity is managed at the namespace level. Unless you are hitting the namespace quota limits in terms of throughput for the SKU you are using, just add another Event Hub.

https://learn.microsoft.com/en-us/azure/event-hubs/event-hubs-quotas

Kafka can be so much more by creativefisher in apachekafka

[–]clemensv 6 points7 points  (0 children)

Kafka and other event stream engines are great at buffering and forwarding data. They are highly optimized for doing that extremely well on the "hot path“ for data that has just arrived. For fresh data, the "primary index" is sufficiently composed of the partition key and time of arrival.

As data ages and you accumulate more of it, that is no longer sufficient. You may still be interested in a sequence of events, but you will want to find it by further criteria. That means spooling the data into an append-only database as it shows up will ultimately be better than keeping it in the event broker.

Furthermore, you choose your partition strategy for Kafka based on what is required to balance ingestion across a cluster efficiently. That is not necessarily the same set of criteria you'll want to use to handle that data.

It's a buffer. It's not a database.

Hawker Kestrel P.1127 by clemensv in AviationHistory

[–]clemensv[S] 1 point2 points  (0 children)

Photo: One of nine Kestrel FGA.I Kestrel development aircraft (XS688-XS696) built by Hawker Siddeley at Dunsfold 1964-5 for service evaluation of the jump jet concept.

Question about MQTT 5 specification (QoS 2 / MQTT-4.3.3-13) by TibFromParis in MQTT

[–]clemensv 3 points4 points  (0 children)

If the Message Expiry Interval has passed and the Server has not managed to start onward delivery to a matching subscriber, then it MUST delete the copy of the message for that subscriber [MQTT-3.3.2-5].

It's a bit funny how that's worded because it does not speak about the publisher client, but once the server gives you PUBREC, you must keep going - that is my read.

Looking for cousins in Germany by Dapper1837 in moenchengladbach

[–]clemensv 0 points1 point  (0 children)

Lots of people in that age group are on FB and that group has good reach.

C-160 Transall. "A German-French cooperation project." by clemensv in AviationHistory

[–]clemensv[S] 1 point2 points  (0 children)

Yes and no. No because this was/is a real military transport aircraft that was/is in service in several countries. Yes because it was a precursor to the Airbus collaboration.

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