https://presentations.clickhouse.com/
    https://presentations.clickhouse.com/2017-shad/index.html

2025
Otus - ClickHouse place in SystemDesign 0:00 of 1:53:23
    https://www.youtube.com/watch?v=ksoa7EmhwoA
SqlNinja - Artemiy - What Is the Truth from What is Talking about ClickHouse of 1:05:58
    https://www.youtube.com/watch?v=7ziBC_lb6TY
    ! CH is motly like LSM-tree (SS-Table), write-optimized (MergeTree engine)
    ! CH has no mem-table (data is going directly to disk)
    ! 5:00      internals (data storage)
    ! 7:00      We can't change anything in written chunks (append-only)
    !           => There are no locks in CH
    ! 8:00      Over time, this leads to huge not-needed data
    !           If we need to delete some data, then write a new chunk with thomb-stone, marking that some key is deleted
    ! 9:00      Over time we merge chunks into a bigger ones
    ! 10:00     OPTIMIZE TABLE <table-name>;
    ! 11:00     SELECT active, name, rows FROM system.parts WHERE database='test' AND table='table';
    ! 16:00     mutations (ALTER TABLE <table-name> UPDATE/DELETE WHERE ...)
    ! 18:00     mutations are faster than optimizations, but slow in general, non-consistent if dropped in the mean-time
    ! 21:00     async_insert setting is available at CH (around 1-sec buffer)
    ! 23:00     indexes consist of granulas (can represent multiple records each)
    ! 25:00     SELECT part_name, mark_number, rows_in_granule, idx FROM mergeTreeIndex('test', 'table') LIMIT 4;
    ! 32:00     SET send_logs_level='trace' SELECT ...
    ! 35:00     SELECT ... SETTINGS join_algorithm='full_sorting_merge';
    ! 38:00     CH and JOINs details
    ! 39:00     ENGINE=Dictionary !!!
    ! 40:00     Plus/Minus of CH, 
    !           Super Cool SQL Dialect, Wide range of useful functions
Otus - Integration with Kafka, PG, S3 and Superset ru of 1:27:53
    https://www.youtube.com/watch?v=GOT0kiOy-_M
    ! tg chat ???
    ! 1:07:00 !!! ... engine kafka settings ... ;
2024
Otus - ClickHouse Arch ru of 1:28:21
    https://www.youtube.com/watch?v=xpn41LXVPu4
    ! 1:25:00 - list of resources
Otus - Kafka and ClickHouse of 1:41:20
    https://www.youtube.com/watch?v=Jp1SEm4UU48
    ! 49:00 - ClickHouse Kafka Connect Sink
    ! 52:00 - REST Api for Kafka Connectors
    ! 1:00:00 - Debezium Docker image for pg
2023
Otus - ClickHouse Effective HighLoad Usage ru of 1:32:02
    https://www.youtube.com/watch?v=d_LSJvBk_NU
ClickHouse - Kita - Modern SQL in 2023 20:00 of 33:05
    https://www.youtube.com/watch?v=zhrOYQpgvkk
    ! 18:00 "explain query tree" system query
    !   ... run_passes=0/1 select id, value from test_table; 
ListenIT - What ClickHouse is and Columnt DBs ru of 14:46
    https://www.youtube.com/watch?v=2b4heaO3U8k
PostHog - In-depth: ClickHouse vs PostgreSQL of 7:32
    https://www.youtube.com/watch?v=iLXXoDaFoxs
YandexCloud - ClickHouse Naughty Advices of 32:03
    https://www.youtube.com/watch?v=UR0rmA_-KfA
    ! 17:00 !!! Do not insert by each single raw - every insert - is a separate part
2022
Altinity - High Performance, High Reliability Data Loading on ClickHouse® | Webinar for ClickHouse® of 1:00:52
    https://www.youtube.com/watch?v=rexGRyl8yuA
Altinity Quickstart for ClickHouse® — Creating Your First Application | Tutorial for ClickHouse® of 1:07:02
    https://www.youtube.com/watch?v=rawoPXXGiYY
    ! 19:02 show tables from system;
Altinity - Altinity Quickstart for ClickHouse® | Build Your First App | Training for ClickHouse® of 59:50
    https://www.youtube.com/watch?v=phTu24qCIw0
    ! 48:00 storage internals - files for blocks, idx, ...
SmartData - Shutak - Insert into ClickHouse and not to die of 1:01:45
    https://www.youtube.com/watch?v=XKBYYP5k_Uo
    ! 10:00-15:00 deduplication cfg
    ! 18:00 - insert_deduplicate (shocking default behavior)
    ! 40:00 - Kafka Engine and shards unballancing fight
    !!! https://github.com/odnoklassniki/spark-to-clickhouse-sink
2021
Percona - Robert Hodges and Alexander Zaitsev - ClickHouse Developer Tutorial, Part 2 - Lab Exercises of 26:55
    https://www.youtube.com/watch?v=j1vU43gbcd8
Percona - Robert Hodges and Alexander Zaitsev - ClickHouse Developer Tutorial, Part 1 - Intro to ClickHouse of 1:05:39
    https://www.youtube.com/watch?v=WVk5_tQ-wx8
2020
HighLoad - Krasheninnikov - ClickHouse Data Processing Patterns ru of 51:47
    https://www.youtube.com/watch?v=JSLhU_LJ5VE
    https://highload.ru/spb/2019/abstracts/4862
2018
HighLoad - Zatelepin - What Need to Know about CH Arch ru of 51:02
    https://www.youtube.com/watch?v=PLMSA_gDdyM
    https://habr.com/ru/articles/509540/
    https://temofeev.ru/info/articles/chto-nuzhno-znat-ob-arkhitekture-clickhouse-chtoby-ego-effektivno-ispolzovat-aleksey-zatelepin-2018g/
    ! 11:00 index writes stuff only for each 8192 rows
    ! 15:00 reordring via MergeTree engines (idea is like LSM-tree)
    ! 16:00 sorted data are written to disk in chunks (recommended no less than 1000 records)
    ! 17:00 background merge
    ! 18:00 if we have a lot of chunks, insert-perf will be really slow
    ! 20:00 sharding
YandexForDevelopers - Milovidov - SHAD - 005 - How ClickHouse Works ru 38:00 of 1:56:30
    https://www.youtube.com/watch?v=vbhSrZxm66E
    https://habr.com/ru/companies/yandex/articles/273305/