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Data Apps Design

Data Apps Design

@data_apps

В этом блоге я публикую свои выводы и мнения на работу в Data:

— Data Integration
— Database engines
— Data Modeling
— Business Intelligence
— Semantic Layer
— DataOps and DevOps
— Orchestrating jobs & DAGs
— Business Impact and Value
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Post #122 332
✅ A joy for an eye
Post #120 384
A nice remark from Dmitry Anoshin @rockyourdata

How one can visualize its own DWH ER (Entity-Relationship) model?

I would use these two ways (applicable to my DWH @ Wheely):

- DBeaver's feature ER diagram
- Looker's LookML Diagram

Both ways require relationships to be modeled in advance i.e. defining FOREIGN KEY / REFERENCES constraints or JOIN conditions.

Can anybody suggest more options?
Post #117 350
Data Apps Design Привет! Сегодня 18 ноября в 15.00 приглашаю на вебинар. Полуструктурированные данные в Аналитических Хранилищах: Nested JSON + Arrays - Источники полуструктурированных данных: Events, Webhooks, Logs - Подходы: JSON functions, special data types, External…
So the process of Amazon Redshift cluster migration is almost completed.
New cluster is way more powerful. Now seeking ways to fully utilize its resources 😄

I can state that not everything has gone as expected.
The most painful parts turned out to be:

– Migrating S3 bucket with 1M+ files to a new region (took ~4-5 hours) – really challenging
– Not losing data events while switching between clusters
– VPC and network issues (connecting from BI tool)
– Hotfixing several Python UDFs suddenly not working on a new environment

In some time I will publish a detailed reflection on this process.
Post #116 331
Data Apps Design Привет! Сегодня 18 ноября в 15.00 приглашаю на вебинар. Полуструктурированные данные в Аналитических Хранилищах: Nested JSON + Arrays - Источники полуструктурированных данных: Events, Webhooks, Logs - Подходы: JSON functions, special data types, External…
[RU] Вебинар Полуструктурированные данные в Аналитических Хранилищах: Nested JSON + Arrays

Слайды вебинара: https://docs.google.com/presentation/d/1dUxzGkBgXAp6s-VrFKT8Qw8UF6eZVQywpeQT4-ZohPM/edit?usp=sharing
Запись вебинара: https://youtu.be/dtu0yeFdxvY?t=276
Опрос о вебинаре: https://forms.gle/JPFqoDYhJJjvnMj7A
Google Docs DWH Analyst – Полуструктурированные данные в Аналитических Хранилищах 1 Онлайн-образование
Post #114 324
Привет! Сегодня 18 ноября в 15.00 приглашаю на вебинар.

Полуструктурированные данные в Аналитических Хранилищах: Nested JSON + Arrays

- Источники полуструктурированных данных: Events, Webhooks, Logs
- Подходы: JSON functions, special data types, External tables (Lakehouse)
- Оптимизация производительности

Смотрим на примерах Amazon Redshift, Clickhouse.

Ссылка на регистрацию: https://otus.ru/lessons/dwh/#event-1661
Ссылка на youtube-трансляцию будет опубликована здесь за 5 минут до начала.
Post #112 317
We are in the middle of migration from Amazon Redshift DC2 nodes (2nd gen) to RA3 nodes (3rd gen) at Wheely.

What this means for us:
– Almost unlimited Disk Space (RA3 separate compute and storage)
– Speeding up Data Marts to 2hrs delay from real-time
– Blue/green deployments

I will follow up as soon as we are finished.

Attached simplified checklist plan.

Any questions welcomed.
Post #110 305
I just tried to upgrade onto 21.10 from 21.08.

After 30 minutes this cluster is never coming back.

I hope I can create a new one and restore backup onto it.
Post #109 312
Who knows what the heck is this?
Telegram sold out?
Post #108 460
Post #106 487
Prior to diving deep into complex analytics modeling topics like Sessionization, Attribution, RFM, one has to understand the motivation behind it.

It is the questions that drive business decisions first, then instruments and practices to find reliable answers to these questions.

Which questions does your business ask?

#analytics #modeling
Post #102 403
17 days. The end 😅
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