Community Discussions

I am trying to stream data from CDF to Azure Event Hub with the Python SDK and cannot find anything related to streaming datasets. Only option so far (as I know) is dps = c.datapoints.retrieve_latest(id=184691546499795)which would need a trigger of some sort to keep running. Data from CDF are so called timeseries from different types of sensors. Is there any documentation on Streaming Data for CDF that I could look at or is Streaming really supported? 

Hi, When developing with the Cognite python SDK, a common restriction is  the API imposed restrictions on queries. Quering time-series, for example, is restricted by 100 asset-ids.  I believe the Python SDK should recognize these constraint violations and batch / concurrently dispatch requests in chunks that do not violate constraints. Optionally with a performance-warning to the developer.Is this sane, or do you think that the developer/customer should maintain a wrapper on the SDK for batching each endpoint (as we’ve currently done at Statnett)?

 If a user includes https:// or http:// in the Override Azure Tenant field the url to Azure AD will not include a correct tenant and login is prevented. This has caused login issues for at least a few users.  The request is simply that the form is modified to strip the protocol scheme, ie removing http:// or https:// automatically, if present.  

Hey, In our current workflow we’re expanding the use of Functions as a tool. We’re somewhat hampered by how “clumsy” it is to bundle and version control proprietary dependencies. Is there something in the pipe to address this issue? Kind regards,Robert

Hey!In our tooling for the power-analyst we make computations using the SyntheticTimeseries API. Results from these are used in subsequent analysis, where we have identified a problem for us.    When a synthetic timeseries is computed with a specified aggregate and resolution, that specification is returned  irrespective of there being data on the originating timeseries. In our case, we compute aggregates over long stretches of time which results in situations like the image below: In the figure, the opaque line is the comptued by addition of the two other signals. Spanning over roughly a year, the period in the middle has a linear rise in the SyntheticTimeseries while the originals are empty. These values are of course meaningless and should be omitted in the successive steps of the analysis. Have you considered implementing a density filter or the like for these types of situations? Or, do you believe this is best solved client side by identifying the holes prior to a set of Syntheti

 McKinsey Quarterly did post an interesting set of articles recently, regarding the transition and change management when looking into digital services. I believe some of the topic and views could be interesting to reflect upon. Go here to find out : https://www.mckinsey.com/business-functions/mckinsey-digital/our-insights/five-fifty-so-you-want-to-be-a-software-company?cid=other-eml-alt-mip-mck&hdpid=034603b3-3fba-4313-a963-553dca543b0f&hctky=12386931&hlkid=8635b3c5c91d439a8a47f0bf353a4968  

How a DataOps platform can boost improvement in all parts of the business! And this time is focusing on what is most important - HSE!https://www.pgs.com/investor-relations/ir-news-stock-announcements/pgs-digitalization-initiative-improves-crew-safety/https://www.cognite.com/customers_stories/dataops-in-action-improving-vessel-crew-safety One more big shout out to @Cerys James and @Sverre Olsen ! Congratulations for another amazing use case!

Hey! I’ve a problem with filling a gap from a source to a timeseries in CDF.  Problem descriptionWe’re filling a hole in a time-series from time A to  B. There are some datapoints on the edges of the interval in CDF.Data is extracted from the source, and in python prepped for the datapoints API as a list-of-tuples payload. For an arbitrary period I extract 2976 datapoints which I upload to CDF. Subsequently, I query the time-series for the same period of time and recieve 2928 datapoints. There are no NAN values in the input for either the date-time or value. The data is also hourly, and so I’m wary of it just being an edge effect of poor timestamp specifications for the retrieval. What other PEBCAK things have I missed? Simplified example included below:payload>> [{'externalId': 'ts_externalid', 'datapoints': [...]}]payload[0]["datapoints"][10]>> (1617271200000, 0.0)client.datapoints.insert_multiple(payload)meter_data = client.datapoints.retrieve( start=dates[0], end=dat

 It's been a while, but as promised, here is the follow-up post to my previous article. If you haven't read the previous article, you can find it here.In the first part, I shared the basic concepts about data integration. Today I will continue on the same theme, but the focus will be on latency and frequency. They are related concepts, but not necessarily the same. Why latency and frequency? They are crucial to defining your data pipeline, and they influence which Azure resources you use to cover your needs.What is data latency and frequency? Data latency is how fast/slow data can be retrieved or stored. Low latency means that the data is available in real-time or close to real-time and is vital in use cases where you need to respond quickly to information. Examples are alerts for critical events on machinery and equipment and online games based on real-time experiences. This leads us to the data frequency concept. Data frequency is how many times in a specific period the data should b

Hi, my name is Kine Årdal, and I have the privilege of being the Customer success manager for Neptune Energy. I’d like to share experiences from our latest project, and hoping to get feedback and hear about similar experiences from you in the community. The project kicked off in April, as a12-weeks proof of concept, where we enabled a collaborative environment with seamless data flow of key well data for well planning.Current workflow: In the current well planning workflow, it is challenging to share data efficiently and reliably across disciplines and collaboration partners. There is no central storage of drilling and well data ready for a digital way of working, and data is often stored in silos. In addition, the collaboration with vendors often relies on manual exports/imports, sharing data on e-mails/ftp, which leads to e.g. unnecessary time spent waiting for data, duplication of data and a challenge to keep track of versions.Result: In this project, the initial Neptune well data m

We are looking into cloud-optimized storage formats such as GeoTIFF, Parquet, etc. One of the things we are trying to determine is whether we could fully utilize such cloud optimized formats with CDF Files.Will the download-link returned by CDF Files allow us to do seek-operations and only download parts of the file?

Hi. I’m currently working on an application where we need to check if a node (PLC/PC) have updated any timeseries within x amounts of hours. The way we do it now is to get all timeseries recorded values in a time range, and check if any timeseries have any values. If there is an value on one timeserie, then we consider the node alive. This can be time consuming, since each node can several hundreds/thousands of timeseries. So my question is if there is a way to get the latest recorded value in a collection of timeseries within a timerange? Or just a recorded value in a timerange for a collection of timeseries. In Cognite, we have an asset hierarchy, which preferably would look like this:RigNode 1 TimeSerie1 TimeSerie2 ... Node 2 TimeSerie1 TimeSerie2 ... Node ... TimeSerie1 TimeSerie2 … But the hierarchy could also be completely flat, where all the timeseries are connected to the Rig. Our externalIds for the timeseries are:rigNumber.NodeNumber.SignalNumber So all timeseries wit

Hi all,take a look at https://properate.com/, the landing page for Properate. This is the solution Energima have built on CDF. Remember to watch the landing page embedded video :-)Energima is taking full advantage of several CDF services and Properate includes a stack of cool features!  

The happiest moment in a CSM day/week/month/ YEAR is when we see our customers sharing success cases! Thank you PGS for allowing us to be part of your digital journey! Contratualizations for another fantastic achievement @Cerys James @Sverre Olsen !! 

Database migrations - assets and filesCognite plans to migrate data from Cloud SQL databases in our Google Cloud-based CDF clusters in a two-week period starting June 25, 2021. We plan to migrate the databases containing data for the assets and files resource types. The migration for the two resource types will occur on different days.  We will email customers the exact time of the maintenance window for their cluster, CDF project, and resource type.  Why is this database migration needed?Cognite has recently made CDF available on Azure in addition to Google Cloud. The code running on Google Cloud is currently dependent on database options only available in Google’s public cloud.  Migrating these databases enables us to run the same code base in Google Cloud and Azure, allowing us to bring recent improvements in our Azure implementation to customers on CDF projects hosted on Google Cloud.   APIs in read-only  modeWe will set the API for the impacted resource types in read-only mode dur

For many operators, power trading remains more of an art than a science that still relies heavily on heuristics and trader intuition. But as markets evolve and deviate from historical patterns, the tools and methods to make smarter trades must adapt in order to maintain or grow profitability and become a sustainable source of competitive advantage.In this webinar, we talk about our experience of integrating data science into forecasting and trading analysis, and how we used Cognite Data Fusion to enable analysts and traders to work iteratively in a data science process across a range of analytical topics within the trading domain. Check it out and leave your comments below! What do you see as the biggest opportunities and challenges within power trading analytics?  

I use RAW as a cache system for sensors that come from BACnet (BAS systems) Since it extremly slow.This have worked for some time now, But now CDF would give me a internal server error.. When this error accure, there is no help what so ever on what the problem is.After debugging, It seems i have reached a size cap on a row (5 MB)  but the table have a size cap of about 5 GB (Unconfirmed)So after i included a size check of my data, I chunk it up and spread it out in the rowsAs fare i can see, this limitiations is not mentioned in the docs so here you go, Liberate your data!

If there is one thing we at Cognite get a lot of questions on, it’s contextualization. Not so much what is contextualization (luckily we are getting past that phase now), but specifically on two subsequent topics:How does your contextualization engine actually work? How does contextualization make use case scaling order of magnitude (or two!) more efficient?In this article, we will address both the above questions. We will also offer an ‘executive summary’ on data contextualization and its role in modern data management towards the end for completeness. Dive in!