๋ฐ์ดํ„ฐ ์—”์ง€๋‹ˆ์–ด๋ง

์‹ค์‹œ๊ฐ„ ๋ฐ์ดํ„ฐ ๋ถ„์„ ํ™˜๊ฒฝ ๊ตฌ์ถ• - 06. Clickhouse ํ…Œ์ด๋ธ” ์ข…๋ฅ˜์™€ ์šฉ๋„

Tempo 2025. 3. 31. 08:00

๊ฐœ์š”

ClickHouse๋Š” ์ดˆ๊ณ ์† ๋ถ„์„์„ ์œ„ํ•ด ์„ค๊ณ„๋œ ์ปฌ๋Ÿผ ์ง€ํ–ฅ ๋ฐ์ดํ„ฐ๋ฒ ์ด์Šค๋กœ, ๋‹ค์–‘ํ•œ ๋ฐ์ดํ„ฐ๋ฒ ์ด์Šค ์—”์ง„๊ณผ ํ…Œ์ด๋ธ” ์—”์ง„์„ ์ œ๊ณตํ•ฉ๋‹ˆ๋‹ค.

  • ๋ฐ์ดํ„ฐ๋ฒ ์ด์Šค ์—”์ง„์€ ๋ฐ์ดํ„ฐ๋ฒ ์ด์Šค ์ˆ˜์ค€์—์„œ ๋ฐ์ดํ„ฐ๋ฅผ ์ €์žฅํ•˜๋Š” ๋ฐฉ์‹๊ณผ ๋ฐฑ์—”๋“œ๋ฅผ ๊ฒฐ์ •ํ•ฉ๋‹ˆ๋‹ค.
  • ํ…Œ์ด๋ธ” ์—”์ง„์€ ๊ฐœ๋ณ„ ํ…Œ์ด๋ธ”์˜ ๋ฐ์ดํ„ฐ ์ €์žฅ ๋ฐฉ์‹, ์ฝ๊ธฐ/์“ฐ๊ธฐ ๋ฐฉ๋ฒ•, ๋ณต์ œ ๋ฐฉ์‹ ๋“ฑ์„ ์ •์˜ํ•ฉ๋‹ˆ๋‹ค.

์ด ๊ธ€์—์„œ๋Š” ๋ฐ์ดํ„ฐ๋ฒ ์ด์Šค ์—”์ง„๊ณผ ํ…Œ์ด๋ธ” ์—”์ง„์˜ ์ฃผ์š” ํŠน์ง•, ์ฐจ์ด์ , ์‚ฌ์šฉ ์‚ฌ๋ก€๋ฅผ ํฌํ•จํ•˜์—ฌ ์ƒ์„ธํžˆ ๋ถ„์„ํ•ฉ๋‹ˆ๋‹ค.

1. ClickHouse ๋ฐ์ดํ„ฐ๋ฒ ์ด์Šค ์—”์ง„

๋ฐ์ดํ„ฐ๋ฒ ์ด์Šค ์—”์ง„์€ ClickHouse ๋‚ด์—์„œ ๋ฐ์ดํ„ฐ๋ฒ ์ด์Šค ๋‹จ์œ„๋กœ ๋ฐ์ดํ„ฐ๊ฐ€ ์–ด๋–ป๊ฒŒ ๊ด€๋ฆฌ๋˜๋Š”์ง€ ๊ฒฐ์ •ํ•ฉ๋‹ˆ๋‹ค.

๋ฐ์ดํ„ฐ๋ฒ ์ด์Šค ์—”์ง„ ์ข…๋ฅ˜ ๋ฐ ํŠน์ง•

์—”์ง„ํƒ€์ž… ์ฃผ์š” ํŠน์ง• ์žฅ์  ๋‹จ์  ์‚ฌ์šฉ ์ƒํ™ฉ
Atomic ๋…ผ๋ธ”๋กœํ‚น DDL, ์›์ž์  ํ…Œ์ด๋ธ” ๊ตํ™˜, UUID ๊ธฐ๋ฐ˜ ๊ด€๋ฆฌ ๋†’์€ ๋™์‹œ์„ฑ ์ง€์›, ๋ฐ์ดํ„ฐ ์ผ๊ด€์„ฑ ๋ณด์žฅ ํ…Œ์ด๋ธ” ์‚ญ์ œ ์ง€์—ฐ, UUID ๊ด€๋ฆฌ ๋ณต์žก์„ฑ ์ผ๋ฐ˜์ ์ธ OLAP ์›Œํฌ๋กœ๋“œ
Backup ๋ฐฑ์—… ์Šค๋ƒ…์ƒท์—์„œ ์ฝ๊ธฐ ์ „์šฉ ์—ฐ๊ฒฐ ์ง€์› ๋ฐฑ์—… ์ฆ‰์‹œ ํ™œ์šฉ ๊ฐ€๋Šฅ ์“ฐ๊ธฐ ์ž‘์—… ๋ถˆ๊ฐ€๋Šฅ ๋ฐฑ์—… ๋ฐ์ดํ„ฐ ๋ถ„์„ ์‹œ๋‚˜๋ฆฌ์˜ค
Lazy ์ง€์ • ์‹œ๊ฐ„ ๋™์•ˆ๋งŒ ๋ฉ”๋ชจ๋ฆฌ ์œ ์ง€ (Expiration Time ์„ค์ •) ๋ฉ”๋ชจ๋ฆฌ ์‚ฌ์šฉ ์ตœ์ ํ™” Log ์—”์ง„๋งŒ ์ง€์›, ์ œํ•œ๋œ ์‚ฌ์šฉ ๋ฒ”์œ„ ์ž„์‹œ ์บ์‹œ/๋กœ๊ทธ ๋ฐ์ดํ„ฐ ๋ถ„์„
Materialized*SQL ์™ธ๋ถ€ DB(PostgreSQL/MySQL ๋“ฑ)์™€ ์‹ค์‹œ๊ฐ„ ์—ฐ๋™ ์™ธ๋ถ€ ์‹œ์Šคํ…œ ํ†ตํ•ฉ ์šฉ์ด ์™ธ๋ถ€ DB ์„ฑ๋Šฅ ์˜ํ–ฅ ๊ฐ€๋Šฅ ํ•˜์ด๋ธŒ๋ฆฌ๋“œ ๋ถ„์„ ํ™˜๊ฒฝ
Replicated ZooKeeper ๊ธฐ๋ฐ˜ ๋ฉ”ํƒ€๋ฐ์ดํ„ฐ ๋ณต์ œ ๊ณ ๊ฐ€์šฉ์„ฑ ๋ณด์žฅ ZooKeeper ์˜์กด์„ฑ ์ฆ๊ฐ€ ํด๋ผ์šฐ๋“œ/๋ถ„์‚ฐ ํ™˜๊ฒฝ
*MaterializedSQL: PostgreSQL, MySQL, SQLite ๋“ฑ ๋‹ค์–‘ํ•œ ์™ธ๋ถ€ DB ์ง€์›(https://clickhouse.com/docs/engines/database-engines)

๋ฐ์ดํ„ฐ๋ฒ ์ด์Šค ์ƒ์„ฑ ์˜ˆ์ œ

1. Atomic ์—”์ง„์„ ์‚ฌ์šฉํ•œ ๋ฐ์ดํ„ฐ๋ฒ ์ด์Šค ์ƒ์„ฑ

-- Atomic ๋ฐ์ดํ„ฐ๋ฒ ์ด์Šค ์ƒ์„ฑ (๊ธฐ๋ณธ๊ฐ’์ด๋ฏ€๋กœ ENGINE ์ง€์ • ๋ถˆํ•„์š”)
CREATE DATABASE my_database;

-- ๋ช…์‹œ์ ์œผ๋กœ Atomic ์—”์ง„ ์ง€์ •
CREATE DATABASE my_atomic_db ENGINE = Atomic;

-- ํ…Œ์ด๋ธ” ๊ตํ™˜ ์˜ˆ์‹œ (์›์ž์  ์ž‘์—…)
EXCHANGE TABLES table1 AND table2;

 

2. Lazy ์—”์ง„์„ ์‚ฌ์šฉํ•œ ๋ฐ์ดํ„ฐ๋ฒ ์ด์Šค ์ƒ์„ฑ

CREATE DATABASE lazy_db ENGINE = Lazy(3600); -- 1์‹œ๊ฐ„ ๋™์•ˆ ๋ฉ”๋ชจ๋ฆฌ์— ์œ ์ง€

 

3. ์™ธ๋ถ€ ๋ฐ์ดํ„ฐ๋ฒ ์ด์Šค ์‹œ์Šคํ…œ๊ณผ ์—ฐ๊ฒฐํ•˜๋Š” ๋ฐ์ดํ„ฐ๋ฒ ์ด์Šค ์ƒ์„ฑ(Postgresql, mysql ๋“ฑ)

CREATE DATABASE postgres_db ENGINE = PostgreSQL('host:port', 'database', 'user', 'password');

 

4. Replicated ์—”์ง„

CREATE DATABASE replicated_db ENGINE = Replicated('/clickhouse/databases/db_name', 'shard1', 'replica1');
๋ฐ˜์‘ํ˜•

2. ClickHouse ํ…Œ์ด๋ธ” ์—”์ง„

ํ…Œ์ด๋ธ” ์—”์ง„์€ ๊ฐœ๋ณ„ ํ…Œ์ด๋ธ”์˜ ๋ฐ์ดํ„ฐ ์ €์žฅ ๋ฐฉ์‹, ์ฝ๊ธฐ/์“ฐ๊ธฐ ์„ฑ๋Šฅ, ๋ณต์ œ ๋ฉ”์ปค๋‹ˆ์ฆ˜์„ ๊ฒฐ์ •ํ•ฉ๋‹ˆ๋‹ค.

 

์ฃผ์š” ์—”์ง„ ์„ค๋ช… ํŠน์ง•

MergeTree ๊ฐ€์žฅ ๋งŽ์ด ์‚ฌ์šฉ๋˜๋Š” ์—”์ง„, ๋Œ€๊ทœ๋ชจ ๋ฐ์ดํ„ฐ ์ฒ˜๋ฆฌ ์ตœ์ ํ™” โœ… ๋น ๋ฅธ ์ฟผ๋ฆฌ, โœ… ํŒŒํ‹ฐ์…”๋‹ ๊ฐ€๋Šฅ
ReplacingMergeTree ์ค‘๋ณต ์ œ๊ฑฐ๋ฅผ ์œ„ํ•œ MergeTree ๋ณ€ํ˜• โœ… ์ตœ์‹  ๋ฐ์ดํ„ฐ ์œ ์ง€
SummingMergeTree ์ง‘๊ณ„๋ฅผ ์ž๋™์œผ๋กœ ์ˆ˜ํ–‰ํ•˜๋Š” MergeTree ๋ณ€ํ˜• โœ… ์‚ฌ์ „ ์ง‘๊ณ„ ์ตœ์ ํ™”
Distributed ์—ฌ๋Ÿฌ ๋…ธ๋“œ์— ๊ฑธ์ณ ๋ฐ์ดํ„ฐ๋ฅผ ๋ถ„์‚ฐ ์ €์žฅ โœ… ์ƒค๋”ฉ ๋ฐ ๋กœ๋“œ ๋ฐธ๋Ÿฐ์‹ฑ
Log ๊ฐ„๋‹จํ•œ ๋กœ๊น… ๋ฐ ๋น ๋ฅธ INSERT โœ… ๋น ๋ฅธ ์“ฐ๊ธฐ, โŒ ์„ฑ๋Šฅ ์ €ํ•˜ ๊ฐ€๋Šฅ
Memory ๋ฐ์ดํ„ฐ๋ฅผ RAM์— ์ €์žฅ โœ… ์ดˆ๊ณ ์† ์ฒ˜๋ฆฌ, โŒ ์˜๊ตฌ ์ €์žฅ ๋ถˆ๊ฐ€

ํ…Œ์ด๋ธ” ์—”์ง„ ๋น„๊ตํ‘œ

MergeTree ๊ณ„์—ด

 

์—”์ง„ ํƒ€์ž… ์ฃผ์š” ํŠน์ง• ์žฅ์  ๋‹จ์  ์‚ฌ์šฉ ์ƒํ™ฉ
MergeTree ๊ธฐ๋ณธ ๊ณ„์—ด, ํ”„๋ผ์ด๋จธ๋ฆฌ ํ‚ค ๊ธฐ๋ฐ˜ ์ •๋ ฌ ๊ณ ์„ฑ๋Šฅ ๋ฒ”์šฉ ์ฒ˜๋ฆฌ ๋ณต์žกํ•œ ์„ค์ • ํ•„์š” ๋Œ€๊ทœ๋ชจ ์‹œ๊ณ„์—ด ๋ฐ์ดํ„ฐ
ReplacingMergeTree ๋ฒ„์ „ ์ปฌ๋Ÿผ ๊ธฐ๋ฐ˜ ์ค‘๋ณต ์ œ๊ฑฐ ๋ฐ์ดํ„ฐ ์ค‘๋ณต ๋ฐฉ์ง€ ์ตœ์ข… ์ผ๊ด€์„ฑ๋งŒ ๋ณด์žฅ CDC(Change Data Capture) ์‹œ์Šคํ…œ
SummingMergeTree ๋™์ผ ํ‚ค ๊ฐ’์˜ ์ˆซ์ž ์ปฌ๋Ÿผ ํ•ฉ์‚ฐ ์ง‘๊ณ„ ์ฟผ๋ฆฌ ์„ฑ๋Šฅ ํ–ฅ์ƒ ๋น„์ง‘๊ณ„ ์ปฌ๋Ÿผ ์ฒ˜๋ฆฌ ๋ณต์žก ์‹ค์‹œ๊ฐ„ ๋ˆ„์  ํ†ต๊ณ„
AggregatingMergeTree ์‚ฌ์šฉ์ž ์ •์˜ ์ง‘๊ณ„ ํ•จ์ˆ˜ ์ ์šฉ ๋ณต์žก ์ง‘๊ณ„ ์—ฐ์‚ฐ ์ตœ์ ํ™” ์ฟผ๋ฆฌ ์ž‘์„ฑ ๋ณต์žก๋„ ์ฆ๊ฐ€ ๋กค์—… ๋ฐ์ดํ„ฐ ์ฒ˜๋ฆฌ
CollapsingMergeTree Sign ๋งˆ์ปค ๊ธฐ๋ฐ˜ ํ–‰ ์ƒํƒœ ๊ด€๋ฆฌ ๋ณ€๊ฒฝ ์ด๋ ฅ ์ถ”์  ๊ฐ€๋Šฅ ๋ฐ์ดํ„ฐ ์ž…๋ ฅ ์ˆœ์„œ ์˜ํ–ฅ ๋ฐ›์Œ ์ƒํƒœ ๋ณ€๊ฒฝ ์ถ”์  ์‹œ์Šคํ…œ
VersionedCollapsing ๋ฒ„์ „ ์ปฌ๋Ÿผ ์ถ”๊ฐ€๋กœ ์ˆœ์„œ ๋ฌธ์ œ ํ•ด๊ฒฐ ์‹ ๋ขฐ์„ฑ ์žˆ๋Š” ์ƒํƒœ ๊ด€๋ฆฌ ์Šคํ‚ค๋งˆ ์„ค๊ณ„ ๋ณต์žก ๊ธˆ์œต ๊ฑฐ๋ž˜ ์ด๋ ฅ ๊ด€๋ฆฌ
 

Log ๊ณ„์—ด

์—”์ง„ ํƒ€์ž… ์ฃผ์š” ํŠน์ง• ์žฅ์  ๋‹จ์  ์‚ฌ์šฉ ์ƒํ™ฉ
TinyLog ๋‹จ์ผ ํŒŒ์ผ ์ €์žฅ, ์ตœ์†Œ ๊ธฐ๋Šฅ ์ดˆ๊ฒฝ๋Ÿ‰ ๊ตฌํ˜„ ๋™์‹œ ์ ‘๊ทผ ๋ถˆ๊ฐ€๋Šฅ ํ…Œ์ŠคํŠธ ํ™˜๊ฒฝ/์†Œ๋Ÿ‰ ์ฐธ์กฐ ๋ฐ์ดํ„ฐ
StripeLog ์ปฌ๋Ÿผ ๋‹จ์œ„ ์ €์žฅ ์ง€์› TinyLog๋ณด๋‹ค ์„ฑ๋Šฅ ํ–ฅ์ƒ ํ–‰ ๋‹จ์œ„ ์ ‘๊ทผ ๋น„ํšจ์œจ์  ์ค‘๊ฐ„ ํฌ๊ธฐ ๋กœ๊ทธ ๋ฐ์ดํ„ฐ(10๋งŒ ํ–‰ ์ดํ•˜)
Log ๋ฉ€ํ‹ฐ์Šค๋ ˆ๋“œ ์ฝ๊ธฐ ์ง€์› ๋ณ‘๋ ฌ ์ฒ˜๋ฆฌ ๊ฐ€๋Šฅ ์“ฐ๊ธฐ ์‹œ ํ…Œ์ด๋ธ” ์ž ๊ธˆ ๋ฐœ์ƒ ์†Œ๊ทœ๋ชจ ๋ฐฐ์น˜ ์ฒ˜๋ฆฌ ์ž‘์—…
 

Integration ๊ณ„์—ด

์—”์ง„ ํƒ€์ž… ์ฃผ์š” ํŠน์ง• ์žฅ์  ๋‹จ์  ์‚ฌ์šฉ ์ƒํ™ฉ
Kafka ์‹ค์‹œ๊ฐ„ ์ŠคํŠธ๋ฆผ ๋ฐ์ดํ„ฐ ์ˆ˜์‹  ์‹ค์‹œ๊ฐ„ ํŒŒ์ดํ”„๋ผ์ธ ๊ตฌ์ถ• ์˜คํ”„์…‹ ๊ด€๋ฆฌ ํ•„์š” ์ด๋ฒคํŠธ ์ŠคํŠธ๋ฆฌ๋ฐ ์ฒ˜๋ฆฌ
MySQL MySQL ํ…Œ์ด๋ธ” ๋งคํ•‘ ์‹ค์‹œ๊ฐ„ ๋ฐ์ดํ„ฐ ๋™๊ธฐํ™” ์กฐ์ธ ์„ฑ๋Šฅ ์ œํ•œ์  ํ•˜์ด๋ธŒ๋ฆฌ๋“œ ํŠธ๋žœ์žญ์…˜-๋ถ„์„ ์‹œ์Šคํ…œ
PostgreSQL PostgreSQL ์—ฐ๋™ ๋ณตํ•ฉ ์‹œ์Šคํ…œ ํ†ตํ•ฉ ๋Œ€๋Ÿ‰ ๋ฐ์ดํ„ฐ ์ฒ˜๋ฆฌ ์†๋„ ์ €ํ•˜ ํฌ๋กœ์Šคํ”Œ๋žซํผ ๋ถ„์„

*์ด ์™ธ์—๋„ s3, iceberg, hudi ๋“ฑ ๋‹ค์–‘ํ•œ ์„œ๋น„์Šค์™€ ์—ฐ๋™์ด ๊ฐ€๋Šฅํ•จ

 

Special ๊ณ„์—ด

์—”์ง„ ํƒ€์ž… ์ฃผ์š” ํŠน์ง• ์žฅ์  ๋‹จ์  ์‚ฌ์šฉ ์ƒํ™ฉ
Memory ์ „์ฒด ๋ฐ์ดํ„ฐ RAM ์ €์žฅ ์ดˆ๊ณ ์† ์ ‘๊ทผ ๋ฐ์ดํ„ฐ ํœ˜๋ฐœ์„ฑ ์ž„์‹œ ๊ณ„์‚ฐ์šฉ ๋ฒ„ํผ
Distributed ํด๋Ÿฌ์Šคํ„ฐ ๋…ธ๋“œ ๋ถ„์‚ฐ ์ฒ˜๋ฆฌ ์ˆ˜ํ‰์  ํ™•์žฅ ๊ฐ€๋Šฅ ๋„คํŠธ์›Œํฌ ์ง€์—ฐ ๋ฐœ์ƒ ๊ฐ€๋Šฅ ๋Œ€๊ทœ๋ชจ ๋ถ„์‚ฐ ์‹œ์Šคํ…œ
Dictionary ์™ธ๋ถ€ ์‚ฌ์ „ ๋ฐ์ดํ„ฐ ๋งคํ•‘ ์กฐ์ธ ์„ฑ๋Šฅ ํ–ฅ์ƒ ์‚ฌ์ „ ๊ฐฑ์‹  ๊ด€๋ฆฌ ํ•„์š” ๊ณตํ†ต ์ฝ”๋“œ ๊ด€๋ฆฌ ์‹œ์Šคํ…œ

ํ…Œ์ด๋ธ” ์—”์ง„ ์„ ํƒ ๊ฐ€์ด๋“œ

1. ๋ฐ์ดํ„ฐ ๊ทœ๋ชจ:

  • 1M(1,000,000) ํ–‰ ๋ฏธ๋งŒ -> Log ๊ณ„์—ด
  • 1M ~ 1B(1,000,000,000) ํ–‰ -> MergeTree ๊ณ„์—ด
  • 1B ํ–‰ ์ด์ƒ -> Distributed + ReplicatedMergeTree

2. ๋ฐ์ดํ„ฐ ํŠน์„ฑ:

  • ์‹œ๊ณ„์—ด -> MergeTree with TTL
  • ์ŠคํŠธ๋ฆฌ๋ฐ -> Kafka Engine + Materialized View
  • ์ž„์‹œ ๋ฐ์ดํ„ฐ -> Memory Engine

3. ์‹œ์Šคํ…œ ์š”๊ตฌ์‚ฌํ•ญ:

  • ๊ณ ๊ฐ€์šฉ์„ฑ -> ReplicatedMergeTree
  • ์™ธ๋ถ€ ์—ฐ๋™ -> Integration ๊ณ„์—ด
  • ์‹ค์‹œ๊ฐ„ ์ง‘๊ณ„ -> SummingMergeTree

ํ…Œ์ด๋ธ” ์ƒ์„ฑ ์˜ˆ์ œ - MergeTree ์—”์ง„

-- MergeTree ์—”์ง„ ํ…Œ์ด๋ธ” (ํŒŒํ‹ฐ์…”๋‹ ๋ฐ ์ •๋ ฌ ํฌํ•จ)
CREATE TABLE logs (
    timestamp DateTime,
    user_id UInt32,
    event_type String
) ENGINE = MergeTree()
ORDER BY timestamp
PARTITION BY toYYYYMM(timestamp);

-- Distributed ํ…Œ์ด๋ธ” ์ƒ์„ฑ (๋‹ค์ค‘ ๋…ธ๋“œ ๋ถ„์‚ฐ)
CREATE TABLE distributed_logs AS logs
ENGINE = Distributed(cluster_name, default, logs, rand());

 

3. ๊ฒฐ๋ก 

ClickHouse๋Š” ๋ฐ์ดํ„ฐ๋ฒ ์ด์Šค ์—”์ง„๊ณผ ํ…Œ์ด๋ธ” ์—”์ง„์„ ์กฐํ•ฉํ•˜์—ฌ ์ตœ์ ์˜ ์„ฑ๋Šฅ์„ ๊ตฌํ˜„ํ•  ์ˆ˜ ์žˆ๋„๋ก ์„ค๊ณ„๋˜์—ˆ์Šต๋‹ˆ๋‹ค.

  • ๋ฐ์ดํ„ฐ๋ฒ ์ด์Šค ์—”์ง„: Atomic์ด ๊ธฐ๋ณธ์ด๋ฉฐ, MySQL ์—ฐ๋™ ๋ฐ ๋ณต์ œ๊ฐ€ ํ•„์š”ํ•œ ๊ฒฝ์šฐ ํŠน์ˆ˜ ์—”์ง„ ์‚ฌ์šฉ
  • ํ…Œ์ด๋ธ” ์—”์ง„: MergeTree ๊ณ„์—ด์ด ๊ธฐ๋ณธ์ด๋ฉฐ, ๋ถ„์‚ฐ, ์‹ค์‹œ๊ฐ„ ๋ถ„์„, ์ง‘๊ณ„ ์ตœ์ ํ™” ๋“ฑ ๋‹ค์–‘ํ•œ ๋ณ€ํ˜• ์—”์ง„ ์กด์žฌ

์ถ”์ฒœ ์กฐํ•ฉ ์˜ˆ์‹œ

  • ๋‹จ์ผ ์„œ๋ฒ„: Atomic + MergeTree
  • ๊ณ ๊ฐ€์šฉ์„ฑ (ํด๋Ÿฌ์Šคํ„ฐ ํ™˜๊ฒฝ): Replicated + Distributed
  • ์‹ค์‹œ๊ฐ„ ๋ถ„์„ (Kafka ์—ฐ๋™): Atomic + Kafka + MergeTree
  • ๋ฉ”๋ชจ๋ฆฌ ๊ธฐ๋ฐ˜ ๋น ๋ฅธ ์ฟผ๋ฆฌ: Memory

๐Ÿš€ ๋‹ค์Œ ๊ธ€์—์„œ๋Š” ๊ฐ๊ฐ์˜ ์—”์ง„ ํ…Œ์ด๋ธ”์„ ์ƒ์„ฑํ•˜๊ณ  ๋ฐ์ดํ„ฐ๋ฅผ ์ถ”๊ฐ€ํ•˜๋Š” ์‹ค์Šต์„ ์ง„ํ–‰ํ•˜๊ฒ ์Šต๋‹ˆ๋‹ค.

  • ํŠนํžˆ ๋ถ„์‚ฐ ํด๋Ÿฌ์Šคํ„ฐ ํ™˜๊ฒฝ์—์„œ ํ…Œ์ด๋ธ” ์ƒ์„ฑ ํ›„ ์ฃผ์š” ์—”์ง„๋ณ„ ๋ฐ์ดํ„ฐ ์กฐํšŒ ๋ฐฉ๋ฒ•๊ณผ ์ด์ „ ๊ธ€(https://jongwho.tistory.com/26)์—์„œ ๋‹ค๋ค˜๋˜ ์‹ค์‹œ๊ฐ„ ๋ถ„์„ ๋ฐ์ดํ„ฐ ์ฒ˜๋ฆฌ ๋ฐฉ๋ฒ•์— ์ค‘์ ์„ ๋‘์–ด ์„ค๋ช…ํ•˜๊ฒ ์Šต๋‹ˆ๋‹ค.
๋ฐ˜์‘ํ˜•

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