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์ด๊ทœ์žฌ ์ˆ˜์„์—ฐ๊ตฌ์› / NAVER LABS 
nBase-ARC: Redis Cluster
1. nBase-ARC ์†Œ๊ฐœ 2. ์˜คํ”ˆ ์†Œ์Šค ์ œํ’ˆ๊ณผ ๋น„๊ต 3. ๋ฐœ์ „ ๋ฐฉํ–ฅ 
CONTENTS
1. nBase-ARC ์†Œ๊ฐœ
Scale-out ํด๋Ÿฌ์Šคํ„ฐ 
๋น„์šฉ ํšจ์œจ์„ฑ 
์„œ๋น„์Šค ์—ฐ์†์„ฑ 
ํ™•์žฅ/์ถ•์†Œ 
์ผ๋ฐ˜ ์ปดํ“จํ„ฐ๋ฅผ ์ด์šฉํ•ด ์‹œ์Šคํ…œ ๊ตฌ์ถ• 
์ž‘๊ฒŒ ์‹œ์ž‘ํ•ด์„œ ํฌ๊ฒŒ ์„ฑ๊ณตํ•  ์ˆ˜ ์žˆ์–ด์•ผ โ€ฆ 
์šด์˜ ์ž‘์—…์ด ์„œ๋น„์Šค์— ์˜ํ–ฅ์„ ์ฃผ์–ด์„  ์•ˆ๋จ 
์ธํ„ฐ๋„ท ์Šค์ผ€์ผ ์„œ๋น„์Šค์— ํ•„์š”ํ•œ ๋ถ„์‚ฐ ์ €์žฅ ์‹œ์Šคํ…œ
nBase-ARC๋Š” 
Autonomous 
Redis 
Cluster 
nBase- Labs์—์„œ ๋งŒ๋“œ๋Š” Scale-out ํด๋Ÿฌ์Šคํ„ฐ ์‹œ๋ฆฌ์ฆˆ 
์šด์˜์ž์˜ ๊ฐœ์ž… ์—†์ด ๋™์ž‘ํ•˜๋Š” (์žฅ์•  ํƒ์ง€, ์žฅ์•  ์ฒ˜๋ฆฌ) 
๊ณ ์†์˜ In-Memory ์—ฐ์‚ฐ์ด ๊ฐ€๋Šฅํ•œ 
Scale-out ํด๋Ÿฌ์Šคํ„ฐ
ํƒ„์ƒ ๋ฐฐ๊ฒฝ (1/2) 
In-memory ๊ธฐ๋ฐ˜์˜ ๊ณ ์„ฑ๋Šฅ, ๊ณ ๊ฐ€์šฉ scale-out ํด๋Ÿฌ์Šคํ„ฐ DB๊ฐ€ ํ•„์š”ํ•ด์ง 
โ€ข์„ธ์…˜ ์ €์žฅ์†Œ๋กœ ๋””์Šคํฌ ๊ธฐ๋ฐ˜์˜ ํด๋Ÿฌ์Šคํ„ฐ๋ฅผ ์‚ฌ์šฉ 
โ€ข๋งŽ์€ ์“ฐ๊ธฐ ๋ถ€ํ•˜๋ฅผ ์ผ์ •ํ•œ ์‘๋‹ต ์†๋„๋กœ ์ฒ˜๋ฆฌํ•ด์•ผ ํ•˜๋Š” ์š”๊ตฌ์‚ฌํ•ญ 
โ€ข๋น„์šฉ ํšจ์œจ์ ์œผ๋กœ ํ•ด๊ฒฐ ํ•ด์•ผ ๋จ 
โ€ขCaching์ด ๋„์›€์ด ๋˜์งˆ ์•Š์Œ
ํƒ„์ƒ ๋ฐฐ๊ฒฝ (2/2) 
โ€ขSimple 
โ€ขFast 
โ€ขPersistent 
โ€ขAvailable 
์ •๋ถ€ ๊ณผ์ œ: ํŽ˜ํƒ€๋ฐ”์ดํŠธ๊ธ‰ ๋Œ€์šฉ๋Ÿ‰ ์ด๊ธฐ์ข… ํด๋Ÿฌ์Šคํ„ฐ๋“œ DBMS SW ๊ฐœ๋ฐœ 
๋ณต์ œ 
Configuration Master
Required Features 
์žฅ์•  ์ฒ˜๋ฆฌ 
โ€ข์žฅ์• ๋ฅผ ๊ฐ์ง€ํ•ด ์ž๋™์œผ๋กœ fail-over ํ•ด์•ผ ํ•œ๋‹ค 
Scale-out 
โ€ข์žฅ๋น„๋ฅผ ํˆฌ์ž…ํ•ด rebalancing ํ•  ์ˆ˜ ์žˆ๋‹ค 
API 
โ€ข๊ธฐ์กด Redis ํด๋ผ์ด์–ธํŠธ๋ฅผ ๊ทธ๋Œ€๋กœ ์‚ฌ์šฉ 
๋ถ„์‚ฐ ๋ฐฉ์‹ 
โ€ข์—ฌ๋Ÿฌ ์žฅ๋น„์— ๋ฐ์ดํ„ฐ๋ฅผ ๋‚˜๋ˆ„์–ด ์ฒ˜๋ฆฌํ•ด์•ผ ํ•œ๋‹ค 
๊ฐ€์šฉ์„ฑ 
โ€ข๋ฐ์ดํ„ฐ durability, ์„œ๋น„์Šค availability 
โ€ข์žฅ์• , ์šด์˜ ์ž‘์—… ๋“ฑ์— ์˜ํ•ด ์„œ๋น„์Šค๊ฐ€ ์˜ํ–ฅ์„ ๋ฐ›์ง€ ์•Š์•„์•ผ ํ•œ๋‹ค 
์„œ๋น„์Šค ์—ฐ์†์„ฑ
๋ถ„์‚ฐ ๋ฐฉ์‹ 
0 
1 
2 
8191 
PG 0 
PG 1 
PG N 
PGS 1 
PGS 2 
PGS 3 
PGS 4 
PGS 5 
CRC16(key) % 8192 
๋ณต์ œ ๊ทธ๋ฃน 
Partition Group 
Partition Number 
Key์— ๋Œ€ํ•œ hash ๊ฐ’์„ ๊ธฐ๋ฐ˜์œผ๋กœ ํ•˜๋Š” ๋ถ„ํ•  ๋ฐฉ์‹ ์ฑ„ํƒ
๊ฐ€์šฉ์„ฑ โ€“ Redis ๋ณต์ œ 
โ€ขRedis ๋ณต์ œ๋Š” ๋น„ ๋™๊ธฐ ๋ณต์ œ๋กœ master ์žฅ์•  ๋ฐœ์ƒํ•˜๋ฉด ๋ฐ์ดํ„ฐ ์œ ์‹ค 
โ€ขSlave์— ์ฝ๊ธฐ๋ฅผ ํ•˜๋ฉด ์ด์ „ ๋ฐ์ดํ„ฐ๋ฅผ ์ฝ์„ ์ˆ˜ ์žˆ์Œ 
โ€ข๋ณต์ œ ๋™๊ธฐํ™”๋Š” sync ๋ฐฉ์‹๊ณผ (RDB + replication buffer), psync (์ผ์‹œ์  ๋‹จ์ ˆ ๋Œ€๋น„ ๋ฒ„ํผ ์œ ์ง€) ๋ฐฉ์‹์„ ์ง€์› ๏ƒจ ์„ค์ •์ด ์–ด๋ ค์›€ 
Client 
Master 
Slave 
request 
response 
request 
๋ณต์ œ๋ฅผ ํ†ตํ•ด ์„œ๋น„์Šค ๋ฐ ๋ฐ์ดํ„ฐ ๊ฐ€์šฉ์„ฑ ํ™•๋ณด. ํ•˜์ง€๋งŒ Redis ๋ณต์ œ๋Š” ๋ฌธ์ œ
๊ฐ€์šฉ์„ฑ โ€“ ๋ณต์ œ 
โ€ขConsensus ๊ธฐ๋ฐ˜์˜ ๋ณต์ œ ๋ฐฉ์‹ ๊ตฌํ˜„ (State Machine Replicator) 
๏ƒ˜Master๊ฐ€ ๋ช…๋ น์–ด, commit ๋ฉ”์‹œ์ง€๋กœ ๊ตฌ์„ฑ๋œ ๋ณต์ œ ๋กœ๊ทธ ์ƒ์„ฑ 
โ€ข๋ช…๋ น์–ด ๋ณต์ œ์™€ ์‹คํ–‰์„ ๋ถ„๋ฆฌ. ๋ช…๋ น์–ด์˜ ๊ฐ€์šฉ์„ฑ์ด ํ™•๋ณด๋œ ๊ฒฝ์šฐ ์‹คํ–‰ 
โ€ข์–ด๋–ค Redis์— ์ฝ๊ธฐ๋ฅผ ํ•ด๋„ consistentํ•œ ๊ฒฐ๊ณผ (read offloading) 
Client 
Redis 
Redis 
request 
response 
Master SMR 
Slave SMR 
replicate 
commit 
commit 
LOG (MMAP) 
LOG (MMAP)
๊ฐ€์šฉ์„ฑ โ€“ ๋ณต์ œ (๊ณ„์†) 
โ€ข๋ช…๋ น์–ด์˜ ๊ฐ€์šฉ์„ฑ์€ ์‹คํ–‰๋˜๊ธฐ ์ „์— ์ €์žฅ๋˜๋Š” ๋กœ๊ทธ์˜ ๊ฐœ์ˆ˜๋กœ ๋ณด์žฅ๋จ 
๏ƒ˜์˜ˆ๋ฅผ ๋“ค์–ด 2์ธ ๊ฒฝ์šฐ, ๋‘ ์žฅ๋น„์˜ ๋กœ๊ทธ์— ์ €์žฅ๋œ ์ดํ›„์— ์‹คํ–‰ 
๏ƒ˜์†๋„๋ฅผ ์œ„ํ•ด ๋กœ๊ทธ ํŒŒ์ผ์— ๋Œ€ํ•œ ์—ฐ์‚ฐ์€ OS buffer ๊นŒ์ง€ ์“ฐ๊ณ  ๋ฆฌํ„ด 
๏ƒ˜๋กœ๊ทธ ํŒŒ์ผ์€ 1์ดˆ (๋˜๋Š” 10M) ์ฃผ๊ธฐ๋กœ ๋””์Šคํฌ๋กœ sync ๋จ
๊ฐ€์šฉ์„ฑ โ€“ ๋ณต์ œ ๋™๊ธฐํ™” 
โ€ข๋กœ๊ทธ์™€ ๊ฒฐํ•ฉ๋œ checkpoint (RDB)๋ฅผ ์ด์šฉํ•ด ๋กœ์ปฌ ๋ฐ์ดํ„ฐ๋ฅผ ๋ณต๊ตฌํ•จ 
Checkpoint (RDB + log seq.) 
Log 
+ 
โ€ข ๋‹ค๋ฅธ ๋ณต์ œ node๋กœ ๋ถ€ํ„ฐ ๋ณต๊ตฌ๋œ ๋ถ€๋ถ„ ์ดํ›„์˜ log๋ฅผ ๋ฐ›์•„์„œ ๋ณต์ œ ๋™๊ธฐํ™” ๊ฐ€๋Šฅ 
Master 
Slave 
Redis 
Checkpoint ๋ณต๊ตฌ 
LOGSEQ 
LOGSEQโ€™
์žฅ์•  ์ฒ˜๋ฆฌ โ€“ Failure detection 
Failure Detection 
Fail over 
+ 
โ€ขHeartbeat module(HB)์ด ์‘์šฉ ๋ ˆ๋ฒจ (L7) ping ๋ฉ”์‹œ์ง€ ์ „์†ก 
โ€ข๋‹ค์ˆ˜์˜ HB ์šด์˜ 
โ€ข๋Œ€์ƒ ์ƒํƒœ์— ๋Œ€ํ•œ ๊ฒฐ์ •์€ Zookeeper ์‚ฌ์šฉ 
๏ƒ˜๋Œ€์ƒ์˜ ์ƒํƒœ ๏ƒจ z-node 
๏ƒ˜๋Œ€์ƒ์˜ ์ƒํƒœ์— ๋Œ€ํ•œ ์˜๊ฒฌ ๏ƒจ z-node ํ•˜์œ„์˜ ephemeral z-node
์žฅ์•  ์ฒ˜๋ฆฌ โ€“ Fail over 
Failure Detection 
Fail over 
+ 
โ€ขCluster controller์— ์˜ํ•ด ์ˆ˜ํ–‰ 
๏ƒ˜๋ณต์ˆ˜์˜ instance๋ฅผ ๋‘๋ฉฐ, ์žฅ์•  ์‹œ leader election์„ ํ†ตํ•ด ์ƒˆ๋กœ์šด cluster controller๊ฐ€ ๋™์ž‘ 
โ€ข๊ฐ์‹œ ๋Œ€์ƒ z-node๋ฅผ watch 
โ€ข์ƒํƒœ ๋ณ€๊ฒฝ ๋ฐœ์ƒ์‹œ (child event) ํด๋Ÿฌ์Šคํ„ฐ์˜ ์ƒํƒœ๋ฅผ ๊ฒฐ์ •ํ•˜๊ณ  fail- over ์ž‘์—… ์ง„ํ–‰
Scale-out 
โ€ขMigration์— ์˜ํ•œ ๋ฐ์ดํ„ฐ ์ฒ˜๋ฆฌ ๋ถ€๋ถ„ ์ด๋™ 
Dump 
Load 
Log catchup 
2PC
API 
โ€ข๊ธฐ์กด Redis ํด๋ผ์ด์–ธํŠธ๋ฅผ ๊ทธ๋Œ€๋กœ ์‚ฌ์šฉํ•  ์ˆ˜ ์žˆ์–ด์•ผ ํ•œ๋‹ค 
๏ƒ˜Gateway
์„œ๋น„์Šค ์—ฐ์†์„ฑ 
โ€ข์žฅ๋น„ ์ถ”๊ฐ€, ์ œ๊ฑฐ, scale-out, ์†Œํ”„ํŠธ์›จ์–ด ์—…๊ทธ๋ ˆ์ด๋“œ 
๏ƒ˜๋ณต์ œ ์ถ”๊ฐ€, ์ œ๊ฑฐ, migration์œผ๋กœ ํ•ด๊ฒฐ๋จ 
โ€ขGateway ์—…๊ทธ๋ ˆ์ด๋“œ, ์ถ”๊ฐ€ ์‚ญ์ œ? 
๏ƒ˜Gateway์— ๋Œ€ํ•œ L4 ์Šค์œ„์น˜ ๊ตฌ์„ฑ? 
๏ƒ˜Gateway lookup ์„œ๋น„์Šค
nBase-ARC ๊ตฌ์กฐ 
HB 
HB 
HB 
Cluster Controller 
Leader 
Follower 
Follower 
Configuration Master 
Cluster 
Gateway 
Gateway 
๋ณต์ œ 
Zookeeper Ensemble 
Redis 
Redis 
Zone
2. ์˜คํ”ˆ ์†Œ์Šค ์ œํ’ˆ๊ณผ ๋น„๊ต
Redis Cluster 
Redis ๊ฐœ๋ฐœ์ž๊ฐ€ ๋งŒ๋“ค๊ณ  ์žˆ๋Š” ์ œํ’ˆ๊ณผ์˜ ์ฐจ์ด์ ์— ๋Œ€ํ•ด ์„ค๋ช… 
๏ƒ˜ARC: nBase-ARC 
๏ƒ˜RC: Redis Cluster
์ •๋ฆฌ 
RC 
ARC 
ํ‚ค ๋ถ„์‚ฐ 
๋™์ผ 
๋ณต์ œ 
Asynchronous 
Consensus 
Node ๋ณต๊ตฌ 
RDB or AOF 
RDB + LOG 
ํด๋ผ์ด์–ธํŠธ ์—ฐ๊ฒฐ 
REDIS 
Gateway 
Migration 
Key ๋‹จ์œ„ 
Key ์˜์—ญ ๋‹จ์œ„ 
Fault detection 
Node๊ฐ„์˜ gossip 
๋ณต์ˆ˜์˜ HB 
CAP ์ธก๋ฉด 
CP 
โ€ขRC: ๊ณ ์„ฑ๋Šฅ+, ์žฅ์• /๋‹จ์ ˆ ๋ฐœ์ƒ ์‹œ ๋ฐ์ดํ„ฐ ์œ ์‹ค 
โ€ขARC: ๊ณ ์„ฑ๋Šฅ, DB
ํด๋ผ์ด์–ธํŠธ ์—ฐ๊ฒฐ 
R 
R 
R 
R 
R 
Gateway 
Gateway 
Gateway 
R 
R 
R 
R 
R 
Client 
Client 
Client 
Client 
RC 
ARC 
โ€ขRedis์— ์ง์ ‘ ์—ฐ๊ฒฐ 
โ€ขSmart client 
๏ƒ˜ํ‚ค ๋ถ„์‚ฐ ์ •๋ณด 
๏ƒ˜Master/slave ์—ฌ๋ถ€ 
โ€ขํ˜•์ƒ ๋ณ€๊ฒฝ ๋ณต์žก 
โ€ขGateway๋กœ ์—ฐ๊ฒฐ 
๏ƒ˜Hop์ด ํ•˜๋‚˜ ์ถ”๊ฐ€ 
โ€ขDummy client 
โ€ขํ˜•์ƒ ๋ณ€๊ฒฝ ์‰ฌ์›€
Partition ๋ฐœ์ƒ์‹œ ๋™์ž‘ 
RC 
ARC 
โ€ขMajority ์˜์—ญ์˜ slave๋Š” master๋กœ promote ๋จ 
โ€ขNODE_TIMEOUT ๊ธฐ๋ฐ˜์œผ๋กœ ๋™์ž‘ํ•˜๊ธฐ ๋•Œ๋ฌธ์— ํŠน์ • ์‹œ๊ฐ„์— ๋‘ ๊ฐœ์˜ master ์กด์žฌ ๊ฐ€๋Šฅ 
โ€ข๋ณต์ œ ์ƒ์˜ commit์ด ์ผ์–ด๋‚˜๊ธฐ ์œ„ํ•œ quorum ์กด์žฌ. Master๊ฐ€ ๋‹จ์ ˆ ๋œ ๊ฒฝ์šฐ ๋™์ž‘ ์ค‘์ง€ 
โ€ขConfiguration master์— ์˜ํ•ด fail-over ๋จ 
M 
S 
M 
S 
Client 
Client
Migration 
RC 
ARC 
MIGRATING SLOT 
IMPORTING SLOT 
SOURCE SLOT 
TARGET SLOT 
Dump Load Log Catch-up 2PC 
WHILE true IF GETKEYSINSLOT MIGRATE key ELSE break 
โ€ขKey ๋‹จ์œ„๋กœ ์ˆ˜ํ–‰ 
โ€ข๋Š๋ฆผ 
โ€ขSlot ์˜์—ญ ๋‹จ์œ„๋กœ ์ˆ˜ํ–‰ 
โ€ข๋น ๋ฆ„
CAP Perspective 
A 
โ€ขPartition์ด ๋ฐœ์ƒํ•˜์ง€ ์•Š๋„๋ก ์†Œํ”„ํŠธ์›จ์–ด๋ฅผ ๋งŒ๋“ค ์ˆ˜ ์—†์Œ 
โ€ขCP 
๏ƒ˜๋ถ„ํ•  ๋ฐœ์ƒ์‹œ consistency ์œ ์ง€ 
โ€ขAP 
๏ƒ˜๋ถ„ํ•  ๋ฐœ์ƒ์‹œ availability ์œ ์ง€ 
๏ƒ˜์ดํ›„ merge ํ•ด์•ผ ํ•จ 
C 
P 
RC 
ARC 
โ€ขNot AP Major partition๋งŒ ์‚ด์•„ ๋‚จ์Œ 
โ€ขNot CP Write ์— ๋Œ€ํ•œ consensus๊ฐ€ ์—†์Œ 
โ€ขCP
์„ฑ๋Šฅ 
โ€ขARC๋Š” latency๊ฐ€ ๋” ํฌ๋‹ค 
๏ƒ˜Gateway์— ์˜ํ•œ hop 
๏ƒ˜๋ณต์ œ layer 
โ€ขARC์˜ ๊ฒฝ์šฐ CPU๋ฅผ ๋” ์‚ฌ์šฉํ•œ๋‹ค 
๏ƒ˜Gateway 
๏ƒ˜Replicator 
โ€ข์„ฑ๋Šฅ์ƒ์˜ ๋ณ‘๋ชฉ์€ ๋„คํŠธ์›Œํฌ์—์„œ ์ƒ๊น€ 
๏ƒ˜๋„คํŠธ์›Œํฌ๋กœ ์ „์†ก๋˜๋Š” ๋ฐ์ดํ„ฐ์˜ ์–‘ 
๏ƒ˜๋„คํŠธ์›Œํฌ๋กœ ์ „์†ก๋˜๋Š” packet์˜ ๊ฐœ์ˆ˜ (interrupt ์ฒ˜๋ฆฌ ๋Šฅ๋ ฅ) 
๏ƒ˜RPS (Receive Packet Steering)/RFS (Receive Flow Steering)๋“ฑ์˜ ๋„คํŠธ์›Œํฌ ์ตœ์ ํ™” ์„ค์ •์ด ํ•„์š”ํ•จ
์„ฑ๋Šฅ - ARC Gateway Affinity 
PG 1 Master PGS 
PG 2 Slave PGS 
PG 3 Slave PGS 
PG 1 Slave PGS 
PG 2 Master PGS 
PG 3 Master PGS 
Gateway 
Gateway 
PG 4 Master PGS 
PG 5 Slave PGS 
PG 6 Slave PGS 
PG 4 Slave PGS 
PG 5 Master PGS 
PG 6 Master PGS 
Gateway 
Gateway 
Client (affinity) 
Client (no affinity) 
๏ƒ˜ํด๋Ÿฌ์Šคํ„ฐ์˜ key mapping ์ •๋ณด๋ฅผ ํžŒํŠธ๋กœ ํ•ด์„œ ์ตœ์ ์˜ gateway๋ฅผ ์„ ํƒํ•˜๋„๋ก ํ•จ (๊ฐœ๋ฐœ ๋ฒ„์ „) 
๏ƒ˜๋„คํŠธ์›Œํฌ ์‚ฌ์šฉ๋Ÿ‰์„ ์ตœ์ ํ™”
์„ฑ๋Šฅ ํ…Œ์ŠคํŠธ ํ™˜๊ฒฝ 
Gateway 
Gateway 
Gateway 
Gateway 
Gateway 
Gateway 
M S 
S M 
M S 
S M 
M S 
S M 
M S 
S M 
M S 
S M 
M S 
S M 
YCSB 
YCSB 
YCSB 
YCSB 
YCSB 
YCSB 
โ€ขLoad generator 6์žฅ๋น„, ํด๋Ÿฌ์Šคํ„ฐ 6๋Œ€ 
โ€ข24๊ฐœ์˜ Redis instance (master 12, slave 12) 
โ€ขYCSB 
๏ƒ˜Scan ๋ช…๋ น ์ œ์™ธ (๋‹จ์ผ ํ‚ค sorted set ์‚ฌ์šฉ) 
๏ƒ˜Driver๋Š” Jedis ๊ธฐ๋ฐ˜ (nBase-ARC java client, Jedis Client)
์‹œํ—˜ ๊ฒฐ๊ณผ - 1K 100% Write 
0 
50000 
100000 
150000 
200000 
250000 
0 
200 
400 
600 
OPS (RC) 
OPS(ARC) 
0 
0.5 
1 
1.5 
2 
2.5 
0 
200 
400 
600 
Latency (RC) 
(ms) 
Latency(ARC)(m 
s) 
โ€ขClient ๊ฐœ์ˆ˜๋ฅผ ๋งŽ์ด ๋Š˜๋ฆด ์ˆ˜ ์—†๋Š” ๋ฌธ์ œ๊ฐ€ ์žˆ์—ˆ์Œ (RC์šฉ Jedis) 
โ€ขCPU ์‚ฌ์šฉ๋Ÿ‰์€ RC (10%), ARC (20%) 
โ€ขRC๋Š” ํด๋ผ์ด์–ธํŠธ ๊ฐœ์ˆ˜๊ฐ€ ๋Š˜์–ด๋‚˜๋ฉด ์„ฑ๋Šฅ์ด ์ €ํ•˜ ๋œ๋‹ค 
๏ƒ˜๊ฐ client๊ฐ€ Redis์— ์ง์ ‘ ์—ฐ๊ฒฐํ•˜๊ธฐ ๋•Œ๋ฌธ์— connection ๊ฐœ์ˆ˜๊ฐ€ ์ฆ๊ฐ€ 
โ€ขARC์˜ ์„ฑ๋Šฅ ์ตœ๋Œ€์น˜๊ฐ€ RC์˜ ์„ฑ๋Šฅ ์ตœ๋Œ€์น˜์— ๋ฏธ์น˜์ง€ ๋ชปํ•˜๋Š” ์ด์œ  
๏ƒ˜๋ณต์ œ layer์— ์˜ํ•ด์„œ ์ž‘์€ ํฌ๊ธฐ์˜ packet ์ „์†ก์ด ์ถ”๊ฐ€๋จ 
85 %
์‹œํ—˜ ๊ฒฐ๊ณผ - 1K 100% Read 
โ€ขCPU ์‚ฌ์šฉ๋Ÿ‰์€ RC (10%), ARC (20%) 
โ€ขARC์˜ ๊ฒฝ์šฐ Consistent read ๋ฅผ ์œ„ํ•œ ๋ณต์ œ ์ƒ์˜ overhead 
๏ƒ˜Operation ์ž์ฒด๋Š” ๋ณต์ œ๋กœ ์ „์†ก๋˜์ง€ ์•Š์ง€๋งŒ ์ˆœ์„œ๋ฅผ ๋งž์ถ”๊ธฐ ์œ„ํ•œ reference data๋Š” ์ „์†ก 
โ€ขRead offloading 
0 
100000 
200000 
300000 
400000 
500000 
0 
200 
400 
600 
OPS (RC) 
OPS(ARC) 
0 
0.2 
0.4 
0.6 
0.8 
1 
1.2 
0 
200 
400 
600 
Latency (RC) 
(ms) 
Latency(ARC)( 
ms) 
93 %
์‹œํ—˜ โ€“ ๊ฒฐ๋ก  
โ€ขRC: ๊ณ ์„ฑ๋Šฅ+, ์žฅ์• /๋‹จ์ ˆ ๋ฐœ์ƒ ์‹œ ๋ฐ์ดํ„ฐ ์œ ์‹ค 
โ€ขARC: ๊ณ ์„ฑ๋Šฅ, DB
3. ๋ฐœ์ „ ๋ฐฉํ–ฅ ๋ฐ ์˜คํ”ˆ ์†Œ์Šค
More Autonomous Cluster 
โ€ข๊ณ ์†์œผ๋กœ ๋™์ž‘ํ•˜๋Š” ์‹œ์Šคํ…œ์ด๊ธฐ ๋•Œ๋ฌธ์— ์‚ฌ๋žŒ์ด ์šด์˜์— ๊ฐœ์ž…ํ•ด์•ผ ํ•˜๋Š” ์ƒํ™ฉ์ด๋ฉด ์ด๋ฏธ ๋Œ€ํ˜• ์žฅ์•  ์ƒํ™ฉ 
โ€ขํ˜„์žฌ๋Š” ์žฅ์•  ๊ฐ์ง€ ๋ฐ ์ฒ˜๋ฆฌ๋งŒ ์ž๋™ํ™”๋จ. ๋”์šฑ ํ•„์š” 
โ€ข์žฅ๋น„ ๊ด€๋ฆฌ์ž (ARC0) 
๏ƒผLocal repository management 
๏ƒผProcess management 
๏ƒผHeartbeat aggregation
Resource Efficiency 
โ€ข์žฅ๋น„์˜ ํšจ์œจ์ ์ธ ์‚ฌ์šฉ์„ ์œ„ํ•ด ํ•œ ์žฅ๋น„์— ์—ฌ๋Ÿฌ process ๊ตฌ๋™ 
โ€ข์„œ๋กœ ๋‹ค๋ฅธ ํด๋Ÿฌ์Šคํ„ฐ์˜ ํ”„๋กœ์„ธ์Šค๊ฐ€ ๋Œ ์ˆ˜ ์žˆ์Œ 
โ€ขProcess (ํด๋Ÿฌ์Šคํ„ฐ) ์‚ฌ์ด์˜ ๊ฐ„์„ญ์ด ์—†๋„๋ก ์‹œ์Šคํ…œ ์ž์› ๊ด€๋ฆฌ 
๏ƒ˜๋„คํŠธ์›Œํฌ, ๋””์Šคํฌ, CPU, ๋ฉ”๋ชจ๋ฆฌ 
โ€ข์žฅ๋น„ ๊ด€๋ฆฌ์ž (ARC0) 
๏ƒผSystem resource management 
๏ƒผSystem resource monitoring
Global Management 
โ€ขGlobal ํ™˜๊ฒฝ์— ์—ฌ๋Ÿฌ zone ์ด ๊ตฌ์ถ•๋จ์— ๋”ฐ๋ผ ์ฒด๊ณ„์ ์ด๊ณ  ์ž๋™ํ™”๋œ ์šด์˜ ๋ฐฉ์‹์ด ํ•„์š”ํ•˜๋‹ค 
HUB 
-Zone registry 
-Resource (e.g. binary) repository 
-User account 
-Global management 
ZONE
์˜คํ”ˆ ์†Œ์Šค 
2015 
์ค€๋น„๋˜๋Š” ๋Œ€๋กœ ์ˆœ์ฐจ์ ์œผ๋กœ ์˜คํ”ˆ ํ•  ์˜ˆ์ •
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[135] แ„‹แ…ฉแ„‘แ…ณแ†ซแ„‰แ…ฉแ„‰แ…ณ แ„ƒแ…ฆแ„‹แ…ตแ„แ…ฅแ„‡แ…ฆแ„‹แ…ตแ„‰แ…ณ, แ„‹แ…ณแ†ซแ„’แ…ขแ†ผ แ„‰แ…ฅแ„‡แ…ตแ„‰แ…ณแ„‹แ…ฆ แ„Žแ…ฅแ†บแ„‡แ…กแ†ฏแ„‹แ…ณแ†ฏ แ„‚แ…ขแ„†แ…ตแ†ฏแ„ƒแ…ก.
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[142]แ„‘แ…งแ†ซแ„€แ…ชแ†ผแ„‹แ…ณแ†ฏ แ„’แ…ชแ†ฏแ„‹แ…ญแ†ผแ„’แ…กแ†ซ6 dof แ„Œแ…ฅแ†ซแ„’แ…งแ†ซแ„€แ…ต[142]แ„‘แ…งแ†ซแ„€แ…ชแ†ผแ„‹แ…ณแ†ฏ แ„’แ…ชแ†ฏแ„‹แ…ญแ†ผแ„’แ…กแ†ซ6 dof แ„Œแ…ฅแ†ซแ„’แ…งแ†ซแ„€แ…ต
[142]แ„‘แ…งแ†ซแ„€แ…ชแ†ผแ„‹แ…ณแ†ฏ แ„’แ…ชแ†ฏแ„‹แ…ญแ†ผแ„’แ…กแ†ซ6 dof แ„Œแ…ฅแ†ซแ„’แ…งแ†ซแ„€แ…ต
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[233]แ„†แ…ฅแ†ฏแ„แ…ตแ„แ…ฆแ„‚แ…ฅแ†ซแ„แ…ณแ„’แ…กแ„ƒแ…ฎแ†ธแ„แ…ณแ†ฏแ„…แ…ฅแ„‰แ…ณแ„แ…ฅ แ„‚แ…กแ†ทแ„€แ…งแ†ผแ„‹แ…ชแ†ซ
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[236] ์ŠคํŠธ๋ฆผ ์ €์žฅ์†Œ ์ตœ์ ํ™” ์ด์•ผ๊ธฐ: ์•„ํŒŒ์น˜ ๋“œ๋ฃจ์ด๋“œ๋กœ๋ถ€ํ„ฐ ์–ป์€ ๊ตํ›ˆ
[236] ์ŠคํŠธ๋ฆผ ์ €์žฅ์†Œ ์ตœ์ ํ™” ์ด์•ผ๊ธฐ: ์•„ํŒŒ์น˜ ๋“œ๋ฃจ์ด๋“œ๋กœ๋ถ€ํ„ฐ ์–ป์€ ๊ตํ›ˆ[236] ์ŠคํŠธ๋ฆผ ์ €์žฅ์†Œ ์ตœ์ ํ™” ์ด์•ผ๊ธฐ: ์•„ํŒŒ์น˜ ๋“œ๋ฃจ์ด๋“œ๋กœ๋ถ€ํ„ฐ ์–ป์€ ๊ตํ›ˆ
[236] ์ŠคํŠธ๋ฆผ ์ €์žฅ์†Œ ์ตœ์ ํ™” ์ด์•ผ๊ธฐ: ์•„ํŒŒ์น˜ ๋“œ๋ฃจ์ด๋“œ๋กœ๋ถ€ํ„ฐ ์–ป์€ ๊ตํ›ˆ
ย 
[235]Wikipedia-scale Q&A
[235]Wikipedia-scale Q&A[235]Wikipedia-scale Q&A
[235]Wikipedia-scale Q&A
ย 
[244]๋กœ๋ด‡์ด ํ˜„์‹ค ์„ธ๊ณ„์— ๋Œ€ํ•ด ํ•™์Šตํ•˜๋„๋ก ๋งŒ๋“ค๊ธฐ
[244]๋กœ๋ด‡์ด ํ˜„์‹ค ์„ธ๊ณ„์— ๋Œ€ํ•ด ํ•™์Šตํ•˜๋„๋ก ๋งŒ๋“ค๊ธฐ[244]๋กœ๋ด‡์ด ํ˜„์‹ค ์„ธ๊ณ„์— ๋Œ€ํ•ด ํ•™์Šตํ•˜๋„๋ก ๋งŒ๋“ค๊ธฐ
[244]๋กœ๋ด‡์ด ํ˜„์‹ค ์„ธ๊ณ„์— ๋Œ€ํ•ด ํ•™์Šตํ•˜๋„๋ก ๋งŒ๋“ค๊ธฐ
ย 
[243] Deep Learning to help studentโ€™s Deep Learning
[243] Deep Learning to help studentโ€™s Deep Learning[243] Deep Learning to help studentโ€™s Deep Learning
[243] Deep Learning to help studentโ€™s Deep Learning
ย 
[234]Fast & Accurate Data Annotation Pipeline for AI applications
[234]Fast & Accurate Data Annotation Pipeline for AI applications[234]Fast & Accurate Data Annotation Pipeline for AI applications
[234]Fast & Accurate Data Annotation Pipeline for AI applications
ย 
Old version: [233]๋Œ€ํ˜• ์ปจํ…Œ์ด๋„ˆ ํด๋Ÿฌ์Šคํ„ฐ์—์„œ์˜ ๊ณ ๊ฐ€์šฉ์„ฑ Network Load Balancing
Old version: [233]๋Œ€ํ˜• ์ปจํ…Œ์ด๋„ˆ ํด๋Ÿฌ์Šคํ„ฐ์—์„œ์˜ ๊ณ ๊ฐ€์šฉ์„ฑ Network Load BalancingOld version: [233]๋Œ€ํ˜• ์ปจํ…Œ์ด๋„ˆ ํด๋Ÿฌ์Šคํ„ฐ์—์„œ์˜ ๊ณ ๊ฐ€์šฉ์„ฑ Network Load Balancing
Old version: [233]๋Œ€ํ˜• ์ปจํ…Œ์ด๋„ˆ ํด๋Ÿฌ์Šคํ„ฐ์—์„œ์˜ ๊ณ ๊ฐ€์šฉ์„ฑ Network Load Balancing
ย 
[226]NAVER ๊ด‘๊ณ  deep click prediction: ๋ชจ๋ธ๋ง๋ถ€ํ„ฐ ์„œ๋น™๊นŒ์ง€
[226]NAVER ๊ด‘๊ณ  deep click prediction: ๋ชจ๋ธ๋ง๋ถ€ํ„ฐ ์„œ๋น™๊นŒ์ง€[226]NAVER ๊ด‘๊ณ  deep click prediction: ๋ชจ๋ธ๋ง๋ถ€ํ„ฐ ์„œ๋น™๊นŒ์ง€
[226]NAVER ๊ด‘๊ณ  deep click prediction: ๋ชจ๋ธ๋ง๋ถ€ํ„ฐ ์„œ๋น™๊นŒ์ง€
ย 
[225]NSML: ๋จธ์‹ ๋Ÿฌ๋‹ ํ”Œ๋žซํผ ์„œ๋น„์Šคํ•˜๊ธฐ & ๋ชจ๋ธ ํŠœ๋‹ ์ž๋™ํ™”ํ•˜๊ธฐ
[225]NSML: ๋จธ์‹ ๋Ÿฌ๋‹ ํ”Œ๋žซํผ ์„œ๋น„์Šคํ•˜๊ธฐ & ๋ชจ๋ธ ํŠœ๋‹ ์ž๋™ํ™”ํ•˜๊ธฐ[225]NSML: ๋จธ์‹ ๋Ÿฌ๋‹ ํ”Œ๋žซํผ ์„œ๋น„์Šคํ•˜๊ธฐ & ๋ชจ๋ธ ํŠœ๋‹ ์ž๋™ํ™”ํ•˜๊ธฐ
[225]NSML: ๋จธ์‹ ๋Ÿฌ๋‹ ํ”Œ๋žซํผ ์„œ๋น„์Šคํ•˜๊ธฐ & ๋ชจ๋ธ ํŠœ๋‹ ์ž๋™ํ™”ํ•˜๊ธฐ
ย 
[224]๋„ค์ด๋ฒ„ ๊ฒ€์ƒ‰๊ณผ ๊ฐœ์ธํ™”
[224]๋„ค์ด๋ฒ„ ๊ฒ€์ƒ‰๊ณผ ๊ฐœ์ธํ™”[224]๋„ค์ด๋ฒ„ ๊ฒ€์ƒ‰๊ณผ ๊ฐœ์ธํ™”
[224]๋„ค์ด๋ฒ„ ๊ฒ€์ƒ‰๊ณผ ๊ฐœ์ธํ™”
ย 
[216]Search Reliability Engineering (๋ถ€์ œ: ์ง€์ง„์—๋„ ํ”๋“ค๋ฆฌ์ง€ ์•Š๋Š” ๋„ค์ด๋ฒ„ ๊ฒ€์ƒ‰์‹œ์Šคํ…œ)
[216]Search Reliability Engineering (๋ถ€์ œ: ์ง€์ง„์—๋„ ํ”๋“ค๋ฆฌ์ง€ ์•Š๋Š” ๋„ค์ด๋ฒ„ ๊ฒ€์ƒ‰์‹œ์Šคํ…œ)[216]Search Reliability Engineering (๋ถ€์ œ: ์ง€์ง„์—๋„ ํ”๋“ค๋ฆฌ์ง€ ์•Š๋Š” ๋„ค์ด๋ฒ„ ๊ฒ€์ƒ‰์‹œ์Šคํ…œ)
[216]Search Reliability Engineering (๋ถ€์ œ: ์ง€์ง„์—๋„ ํ”๋“ค๋ฆฌ์ง€ ์•Š๋Š” ๋„ค์ด๋ฒ„ ๊ฒ€์ƒ‰์‹œ์Šคํ…œ)
ย 
[214] Ai Serving Platform: ํ•˜๋ฃจ ์ˆ˜ ์–ต ๊ฑด์˜ ์ธํผ๋Ÿฐ์Šค๋ฅผ ์ฒ˜๋ฆฌํ•˜๊ธฐ ์œ„ํ•œ ๊ณ ๊ตฐ๋ถ„ํˆฌ๊ธฐ
[214] Ai Serving Platform: ํ•˜๋ฃจ ์ˆ˜ ์–ต ๊ฑด์˜ ์ธํผ๋Ÿฐ์Šค๋ฅผ ์ฒ˜๋ฆฌํ•˜๊ธฐ ์œ„ํ•œ ๊ณ ๊ตฐ๋ถ„ํˆฌ๊ธฐ[214] Ai Serving Platform: ํ•˜๋ฃจ ์ˆ˜ ์–ต ๊ฑด์˜ ์ธํผ๋Ÿฐ์Šค๋ฅผ ์ฒ˜๋ฆฌํ•˜๊ธฐ ์œ„ํ•œ ๊ณ ๊ตฐ๋ถ„ํˆฌ๊ธฐ
[214] Ai Serving Platform: ํ•˜๋ฃจ ์ˆ˜ ์–ต ๊ฑด์˜ ์ธํผ๋Ÿฐ์Šค๋ฅผ ์ฒ˜๋ฆฌํ•˜๊ธฐ ์œ„ํ•œ ๊ณ ๊ตฐ๋ถ„ํˆฌ๊ธฐ
ย 
[213] Fashion Visual Search
[213] Fashion Visual Search[213] Fashion Visual Search
[213] Fashion Visual Search
ย 
[232] TensorRT๋ฅผ ํ™œ์šฉํ•œ ๋”ฅ๋Ÿฌ๋‹ Inference ์ตœ์ ํ™”
[232] TensorRT๋ฅผ ํ™œ์šฉํ•œ ๋”ฅ๋Ÿฌ๋‹ Inference ์ตœ์ ํ™”[232] TensorRT๋ฅผ ํ™œ์šฉํ•œ ๋”ฅ๋Ÿฌ๋‹ Inference ์ตœ์ ํ™”
[232] TensorRT๋ฅผ ํ™œ์šฉํ•œ ๋”ฅ๋Ÿฌ๋‹ Inference ์ตœ์ ํ™”
ย 
[242]์ปดํ“จํ„ฐ ๋น„์ „์„ ์ด์šฉํ•œ ์‹ค๋‚ด ์ง€๋„ ์ž๋™ ์—…๋ฐ์ดํŠธ ๋ฐฉ๋ฒ•: ๋”ฅ๋Ÿฌ๋‹์„ ํ†ตํ•œ POI ๋ณ€ํ™” ํƒ์ง€
[242]์ปดํ“จํ„ฐ ๋น„์ „์„ ์ด์šฉํ•œ ์‹ค๋‚ด ์ง€๋„ ์ž๋™ ์—…๋ฐ์ดํŠธ ๋ฐฉ๋ฒ•: ๋”ฅ๋Ÿฌ๋‹์„ ํ†ตํ•œ POI ๋ณ€ํ™” ํƒ์ง€[242]์ปดํ“จํ„ฐ ๋น„์ „์„ ์ด์šฉํ•œ ์‹ค๋‚ด ์ง€๋„ ์ž๋™ ์—…๋ฐ์ดํŠธ ๋ฐฉ๋ฒ•: ๋”ฅ๋Ÿฌ๋‹์„ ํ†ตํ•œ POI ๋ณ€ํ™” ํƒ์ง€
[242]์ปดํ“จํ„ฐ ๋น„์ „์„ ์ด์šฉํ•œ ์‹ค๋‚ด ์ง€๋„ ์ž๋™ ์—…๋ฐ์ดํŠธ ๋ฐฉ๋ฒ•: ๋”ฅ๋Ÿฌ๋‹์„ ํ†ตํ•œ POI ๋ณ€ํ™” ํƒ์ง€
ย 
[212]C3, ๋ฐ์ดํ„ฐ ์ฒ˜๋ฆฌ์—์„œ ์„œ๋น™๊นŒ์ง€ ๊ฐ€๋Šฅํ•œ ํ•˜๋‘ก ํด๋Ÿฌ์Šคํ„ฐ
[212]C3, ๋ฐ์ดํ„ฐ ์ฒ˜๋ฆฌ์—์„œ ์„œ๋น™๊นŒ์ง€ ๊ฐ€๋Šฅํ•œ ํ•˜๋‘ก ํด๋Ÿฌ์Šคํ„ฐ[212]C3, ๋ฐ์ดํ„ฐ ์ฒ˜๋ฆฌ์—์„œ ์„œ๋น™๊นŒ์ง€ ๊ฐ€๋Šฅํ•œ ํ•˜๋‘ก ํด๋Ÿฌ์Šคํ„ฐ
[212]C3, ๋ฐ์ดํ„ฐ ์ฒ˜๋ฆฌ์—์„œ ์„œ๋น™๊นŒ์ง€ ๊ฐ€๋Šฅํ•œ ํ•˜๋‘ก ํด๋Ÿฌ์Šคํ„ฐ
ย 
[223]๊ธฐ๊ณ„๋…ํ•ด QA: ๊ฒ€์ƒ‰์ธ๊ฐ€, NLP์ธ๊ฐ€?
[223]๊ธฐ๊ณ„๋…ํ•ด QA: ๊ฒ€์ƒ‰์ธ๊ฐ€, NLP์ธ๊ฐ€?[223]๊ธฐ๊ณ„๋…ํ•ด QA: ๊ฒ€์ƒ‰์ธ๊ฐ€, NLP์ธ๊ฐ€?
[223]๊ธฐ๊ณ„๋…ํ•ด QA: ๊ฒ€์ƒ‰์ธ๊ฐ€, NLP์ธ๊ฐ€?
ย 

[2B5]nBase-ARC Redis Cluster

  • 1.
  • 3. 1. nBase-ARC ์†Œ๊ฐœ 2. ์˜คํ”ˆ ์†Œ์Šค ์ œํ’ˆ๊ณผ ๋น„๊ต 3. ๋ฐœ์ „ ๋ฐฉํ–ฅ CONTENTS
  • 5. Scale-out ํด๋Ÿฌ์Šคํ„ฐ ๋น„์šฉ ํšจ์œจ์„ฑ ์„œ๋น„์Šค ์—ฐ์†์„ฑ ํ™•์žฅ/์ถ•์†Œ ์ผ๋ฐ˜ ์ปดํ“จํ„ฐ๋ฅผ ์ด์šฉํ•ด ์‹œ์Šคํ…œ ๊ตฌ์ถ• ์ž‘๊ฒŒ ์‹œ์ž‘ํ•ด์„œ ํฌ๊ฒŒ ์„ฑ๊ณตํ•  ์ˆ˜ ์žˆ์–ด์•ผ โ€ฆ ์šด์˜ ์ž‘์—…์ด ์„œ๋น„์Šค์— ์˜ํ–ฅ์„ ์ฃผ์–ด์„  ์•ˆ๋จ ์ธํ„ฐ๋„ท ์Šค์ผ€์ผ ์„œ๋น„์Šค์— ํ•„์š”ํ•œ ๋ถ„์‚ฐ ์ €์žฅ ์‹œ์Šคํ…œ
  • 6. nBase-ARC๋Š” Autonomous Redis Cluster nBase- Labs์—์„œ ๋งŒ๋“œ๋Š” Scale-out ํด๋Ÿฌ์Šคํ„ฐ ์‹œ๋ฆฌ์ฆˆ ์šด์˜์ž์˜ ๊ฐœ์ž… ์—†์ด ๋™์ž‘ํ•˜๋Š” (์žฅ์•  ํƒ์ง€, ์žฅ์•  ์ฒ˜๋ฆฌ) ๊ณ ์†์˜ In-Memory ์—ฐ์‚ฐ์ด ๊ฐ€๋Šฅํ•œ Scale-out ํด๋Ÿฌ์Šคํ„ฐ
  • 7. ํƒ„์ƒ ๋ฐฐ๊ฒฝ (1/2) In-memory ๊ธฐ๋ฐ˜์˜ ๊ณ ์„ฑ๋Šฅ, ๊ณ ๊ฐ€์šฉ scale-out ํด๋Ÿฌ์Šคํ„ฐ DB๊ฐ€ ํ•„์š”ํ•ด์ง โ€ข์„ธ์…˜ ์ €์žฅ์†Œ๋กœ ๋””์Šคํฌ ๊ธฐ๋ฐ˜์˜ ํด๋Ÿฌ์Šคํ„ฐ๋ฅผ ์‚ฌ์šฉ โ€ข๋งŽ์€ ์“ฐ๊ธฐ ๋ถ€ํ•˜๋ฅผ ์ผ์ •ํ•œ ์‘๋‹ต ์†๋„๋กœ ์ฒ˜๋ฆฌํ•ด์•ผ ํ•˜๋Š” ์š”๊ตฌ์‚ฌํ•ญ โ€ข๋น„์šฉ ํšจ์œจ์ ์œผ๋กœ ํ•ด๊ฒฐ ํ•ด์•ผ ๋จ โ€ขCaching์ด ๋„์›€์ด ๋˜์งˆ ์•Š์Œ
  • 8. ํƒ„์ƒ ๋ฐฐ๊ฒฝ (2/2) โ€ขSimple โ€ขFast โ€ขPersistent โ€ขAvailable ์ •๋ถ€ ๊ณผ์ œ: ํŽ˜ํƒ€๋ฐ”์ดํŠธ๊ธ‰ ๋Œ€์šฉ๋Ÿ‰ ์ด๊ธฐ์ข… ํด๋Ÿฌ์Šคํ„ฐ๋“œ DBMS SW ๊ฐœ๋ฐœ ๋ณต์ œ Configuration Master
  • 9. Required Features ์žฅ์•  ์ฒ˜๋ฆฌ โ€ข์žฅ์• ๋ฅผ ๊ฐ์ง€ํ•ด ์ž๋™์œผ๋กœ fail-over ํ•ด์•ผ ํ•œ๋‹ค Scale-out โ€ข์žฅ๋น„๋ฅผ ํˆฌ์ž…ํ•ด rebalancing ํ•  ์ˆ˜ ์žˆ๋‹ค API โ€ข๊ธฐ์กด Redis ํด๋ผ์ด์–ธํŠธ๋ฅผ ๊ทธ๋Œ€๋กœ ์‚ฌ์šฉ ๋ถ„์‚ฐ ๋ฐฉ์‹ โ€ข์—ฌ๋Ÿฌ ์žฅ๋น„์— ๋ฐ์ดํ„ฐ๋ฅผ ๋‚˜๋ˆ„์–ด ์ฒ˜๋ฆฌํ•ด์•ผ ํ•œ๋‹ค ๊ฐ€์šฉ์„ฑ โ€ข๋ฐ์ดํ„ฐ durability, ์„œ๋น„์Šค availability โ€ข์žฅ์• , ์šด์˜ ์ž‘์—… ๋“ฑ์— ์˜ํ•ด ์„œ๋น„์Šค๊ฐ€ ์˜ํ–ฅ์„ ๋ฐ›์ง€ ์•Š์•„์•ผ ํ•œ๋‹ค ์„œ๋น„์Šค ์—ฐ์†์„ฑ
  • 10. ๋ถ„์‚ฐ ๋ฐฉ์‹ 0 1 2 8191 PG 0 PG 1 PG N PGS 1 PGS 2 PGS 3 PGS 4 PGS 5 CRC16(key) % 8192 ๋ณต์ œ ๊ทธ๋ฃน Partition Group Partition Number Key์— ๋Œ€ํ•œ hash ๊ฐ’์„ ๊ธฐ๋ฐ˜์œผ๋กœ ํ•˜๋Š” ๋ถ„ํ•  ๋ฐฉ์‹ ์ฑ„ํƒ
  • 11. ๊ฐ€์šฉ์„ฑ โ€“ Redis ๋ณต์ œ โ€ขRedis ๋ณต์ œ๋Š” ๋น„ ๋™๊ธฐ ๋ณต์ œ๋กœ master ์žฅ์•  ๋ฐœ์ƒํ•˜๋ฉด ๋ฐ์ดํ„ฐ ์œ ์‹ค โ€ขSlave์— ์ฝ๊ธฐ๋ฅผ ํ•˜๋ฉด ์ด์ „ ๋ฐ์ดํ„ฐ๋ฅผ ์ฝ์„ ์ˆ˜ ์žˆ์Œ โ€ข๋ณต์ œ ๋™๊ธฐํ™”๋Š” sync ๋ฐฉ์‹๊ณผ (RDB + replication buffer), psync (์ผ์‹œ์  ๋‹จ์ ˆ ๋Œ€๋น„ ๋ฒ„ํผ ์œ ์ง€) ๋ฐฉ์‹์„ ์ง€์› ๏ƒจ ์„ค์ •์ด ์–ด๋ ค์›€ Client Master Slave request response request ๋ณต์ œ๋ฅผ ํ†ตํ•ด ์„œ๋น„์Šค ๋ฐ ๋ฐ์ดํ„ฐ ๊ฐ€์šฉ์„ฑ ํ™•๋ณด. ํ•˜์ง€๋งŒ Redis ๋ณต์ œ๋Š” ๋ฌธ์ œ
  • 12. ๊ฐ€์šฉ์„ฑ โ€“ ๋ณต์ œ โ€ขConsensus ๊ธฐ๋ฐ˜์˜ ๋ณต์ œ ๋ฐฉ์‹ ๊ตฌํ˜„ (State Machine Replicator) ๏ƒ˜Master๊ฐ€ ๋ช…๋ น์–ด, commit ๋ฉ”์‹œ์ง€๋กœ ๊ตฌ์„ฑ๋œ ๋ณต์ œ ๋กœ๊ทธ ์ƒ์„ฑ โ€ข๋ช…๋ น์–ด ๋ณต์ œ์™€ ์‹คํ–‰์„ ๋ถ„๋ฆฌ. ๋ช…๋ น์–ด์˜ ๊ฐ€์šฉ์„ฑ์ด ํ™•๋ณด๋œ ๊ฒฝ์šฐ ์‹คํ–‰ โ€ข์–ด๋–ค Redis์— ์ฝ๊ธฐ๋ฅผ ํ•ด๋„ consistentํ•œ ๊ฒฐ๊ณผ (read offloading) Client Redis Redis request response Master SMR Slave SMR replicate commit commit LOG (MMAP) LOG (MMAP)
  • 13. ๊ฐ€์šฉ์„ฑ โ€“ ๋ณต์ œ (๊ณ„์†) โ€ข๋ช…๋ น์–ด์˜ ๊ฐ€์šฉ์„ฑ์€ ์‹คํ–‰๋˜๊ธฐ ์ „์— ์ €์žฅ๋˜๋Š” ๋กœ๊ทธ์˜ ๊ฐœ์ˆ˜๋กœ ๋ณด์žฅ๋จ ๏ƒ˜์˜ˆ๋ฅผ ๋“ค์–ด 2์ธ ๊ฒฝ์šฐ, ๋‘ ์žฅ๋น„์˜ ๋กœ๊ทธ์— ์ €์žฅ๋œ ์ดํ›„์— ์‹คํ–‰ ๏ƒ˜์†๋„๋ฅผ ์œ„ํ•ด ๋กœ๊ทธ ํŒŒ์ผ์— ๋Œ€ํ•œ ์—ฐ์‚ฐ์€ OS buffer ๊นŒ์ง€ ์“ฐ๊ณ  ๋ฆฌํ„ด ๏ƒ˜๋กœ๊ทธ ํŒŒ์ผ์€ 1์ดˆ (๋˜๋Š” 10M) ์ฃผ๊ธฐ๋กœ ๋””์Šคํฌ๋กœ sync ๋จ
  • 14. ๊ฐ€์šฉ์„ฑ โ€“ ๋ณต์ œ ๋™๊ธฐํ™” โ€ข๋กœ๊ทธ์™€ ๊ฒฐํ•ฉ๋œ checkpoint (RDB)๋ฅผ ์ด์šฉํ•ด ๋กœ์ปฌ ๋ฐ์ดํ„ฐ๋ฅผ ๋ณต๊ตฌํ•จ Checkpoint (RDB + log seq.) Log + โ€ข ๋‹ค๋ฅธ ๋ณต์ œ node๋กœ ๋ถ€ํ„ฐ ๋ณต๊ตฌ๋œ ๋ถ€๋ถ„ ์ดํ›„์˜ log๋ฅผ ๋ฐ›์•„์„œ ๋ณต์ œ ๋™๊ธฐํ™” ๊ฐ€๋Šฅ Master Slave Redis Checkpoint ๋ณต๊ตฌ LOGSEQ LOGSEQโ€™
  • 15. ์žฅ์•  ์ฒ˜๋ฆฌ โ€“ Failure detection Failure Detection Fail over + โ€ขHeartbeat module(HB)์ด ์‘์šฉ ๋ ˆ๋ฒจ (L7) ping ๋ฉ”์‹œ์ง€ ์ „์†ก โ€ข๋‹ค์ˆ˜์˜ HB ์šด์˜ โ€ข๋Œ€์ƒ ์ƒํƒœ์— ๋Œ€ํ•œ ๊ฒฐ์ •์€ Zookeeper ์‚ฌ์šฉ ๏ƒ˜๋Œ€์ƒ์˜ ์ƒํƒœ ๏ƒจ z-node ๏ƒ˜๋Œ€์ƒ์˜ ์ƒํƒœ์— ๋Œ€ํ•œ ์˜๊ฒฌ ๏ƒจ z-node ํ•˜์œ„์˜ ephemeral z-node
  • 16. ์žฅ์•  ์ฒ˜๋ฆฌ โ€“ Fail over Failure Detection Fail over + โ€ขCluster controller์— ์˜ํ•ด ์ˆ˜ํ–‰ ๏ƒ˜๋ณต์ˆ˜์˜ instance๋ฅผ ๋‘๋ฉฐ, ์žฅ์•  ์‹œ leader election์„ ํ†ตํ•ด ์ƒˆ๋กœ์šด cluster controller๊ฐ€ ๋™์ž‘ โ€ข๊ฐ์‹œ ๋Œ€์ƒ z-node๋ฅผ watch โ€ข์ƒํƒœ ๋ณ€๊ฒฝ ๋ฐœ์ƒ์‹œ (child event) ํด๋Ÿฌ์Šคํ„ฐ์˜ ์ƒํƒœ๋ฅผ ๊ฒฐ์ •ํ•˜๊ณ  fail- over ์ž‘์—… ์ง„ํ–‰
  • 17. Scale-out โ€ขMigration์— ์˜ํ•œ ๋ฐ์ดํ„ฐ ์ฒ˜๋ฆฌ ๋ถ€๋ถ„ ์ด๋™ Dump Load Log catchup 2PC
  • 18. API โ€ข๊ธฐ์กด Redis ํด๋ผ์ด์–ธํŠธ๋ฅผ ๊ทธ๋Œ€๋กœ ์‚ฌ์šฉํ•  ์ˆ˜ ์žˆ์–ด์•ผ ํ•œ๋‹ค ๏ƒ˜Gateway
  • 19. ์„œ๋น„์Šค ์—ฐ์†์„ฑ โ€ข์žฅ๋น„ ์ถ”๊ฐ€, ์ œ๊ฑฐ, scale-out, ์†Œํ”„ํŠธ์›จ์–ด ์—…๊ทธ๋ ˆ์ด๋“œ ๏ƒ˜๋ณต์ œ ์ถ”๊ฐ€, ์ œ๊ฑฐ, migration์œผ๋กœ ํ•ด๊ฒฐ๋จ โ€ขGateway ์—…๊ทธ๋ ˆ์ด๋“œ, ์ถ”๊ฐ€ ์‚ญ์ œ? ๏ƒ˜Gateway์— ๋Œ€ํ•œ L4 ์Šค์œ„์น˜ ๊ตฌ์„ฑ? ๏ƒ˜Gateway lookup ์„œ๋น„์Šค
  • 20. nBase-ARC ๊ตฌ์กฐ HB HB HB Cluster Controller Leader Follower Follower Configuration Master Cluster Gateway Gateway ๋ณต์ œ Zookeeper Ensemble Redis Redis Zone
  • 21. 2. ์˜คํ”ˆ ์†Œ์Šค ์ œํ’ˆ๊ณผ ๋น„๊ต
  • 22. Redis Cluster Redis ๊ฐœ๋ฐœ์ž๊ฐ€ ๋งŒ๋“ค๊ณ  ์žˆ๋Š” ์ œํ’ˆ๊ณผ์˜ ์ฐจ์ด์ ์— ๋Œ€ํ•ด ์„ค๋ช… ๏ƒ˜ARC: nBase-ARC ๏ƒ˜RC: Redis Cluster
  • 23. ์ •๋ฆฌ RC ARC ํ‚ค ๋ถ„์‚ฐ ๋™์ผ ๋ณต์ œ Asynchronous Consensus Node ๋ณต๊ตฌ RDB or AOF RDB + LOG ํด๋ผ์ด์–ธํŠธ ์—ฐ๊ฒฐ REDIS Gateway Migration Key ๋‹จ์œ„ Key ์˜์—ญ ๋‹จ์œ„ Fault detection Node๊ฐ„์˜ gossip ๋ณต์ˆ˜์˜ HB CAP ์ธก๋ฉด CP โ€ขRC: ๊ณ ์„ฑ๋Šฅ+, ์žฅ์• /๋‹จ์ ˆ ๋ฐœ์ƒ ์‹œ ๋ฐ์ดํ„ฐ ์œ ์‹ค โ€ขARC: ๊ณ ์„ฑ๋Šฅ, DB
  • 24. ํด๋ผ์ด์–ธํŠธ ์—ฐ๊ฒฐ R R R R R Gateway Gateway Gateway R R R R R Client Client Client Client RC ARC โ€ขRedis์— ์ง์ ‘ ์—ฐ๊ฒฐ โ€ขSmart client ๏ƒ˜ํ‚ค ๋ถ„์‚ฐ ์ •๋ณด ๏ƒ˜Master/slave ์—ฌ๋ถ€ โ€ขํ˜•์ƒ ๋ณ€๊ฒฝ ๋ณต์žก โ€ขGateway๋กœ ์—ฐ๊ฒฐ ๏ƒ˜Hop์ด ํ•˜๋‚˜ ์ถ”๊ฐ€ โ€ขDummy client โ€ขํ˜•์ƒ ๋ณ€๊ฒฝ ์‰ฌ์›€
  • 25. Partition ๋ฐœ์ƒ์‹œ ๋™์ž‘ RC ARC โ€ขMajority ์˜์—ญ์˜ slave๋Š” master๋กœ promote ๋จ โ€ขNODE_TIMEOUT ๊ธฐ๋ฐ˜์œผ๋กœ ๋™์ž‘ํ•˜๊ธฐ ๋•Œ๋ฌธ์— ํŠน์ • ์‹œ๊ฐ„์— ๋‘ ๊ฐœ์˜ master ์กด์žฌ ๊ฐ€๋Šฅ โ€ข๋ณต์ œ ์ƒ์˜ commit์ด ์ผ์–ด๋‚˜๊ธฐ ์œ„ํ•œ quorum ์กด์žฌ. Master๊ฐ€ ๋‹จ์ ˆ ๋œ ๊ฒฝ์šฐ ๋™์ž‘ ์ค‘์ง€ โ€ขConfiguration master์— ์˜ํ•ด fail-over ๋จ M S M S Client Client
  • 26. Migration RC ARC MIGRATING SLOT IMPORTING SLOT SOURCE SLOT TARGET SLOT Dump Load Log Catch-up 2PC WHILE true IF GETKEYSINSLOT MIGRATE key ELSE break โ€ขKey ๋‹จ์œ„๋กœ ์ˆ˜ํ–‰ โ€ข๋Š๋ฆผ โ€ขSlot ์˜์—ญ ๋‹จ์œ„๋กœ ์ˆ˜ํ–‰ โ€ข๋น ๋ฆ„
  • 27. CAP Perspective A โ€ขPartition์ด ๋ฐœ์ƒํ•˜์ง€ ์•Š๋„๋ก ์†Œํ”„ํŠธ์›จ์–ด๋ฅผ ๋งŒ๋“ค ์ˆ˜ ์—†์Œ โ€ขCP ๏ƒ˜๋ถ„ํ•  ๋ฐœ์ƒ์‹œ consistency ์œ ์ง€ โ€ขAP ๏ƒ˜๋ถ„ํ•  ๋ฐœ์ƒ์‹œ availability ์œ ์ง€ ๏ƒ˜์ดํ›„ merge ํ•ด์•ผ ํ•จ C P RC ARC โ€ขNot AP Major partition๋งŒ ์‚ด์•„ ๋‚จ์Œ โ€ขNot CP Write ์— ๋Œ€ํ•œ consensus๊ฐ€ ์—†์Œ โ€ขCP
  • 28. ์„ฑ๋Šฅ โ€ขARC๋Š” latency๊ฐ€ ๋” ํฌ๋‹ค ๏ƒ˜Gateway์— ์˜ํ•œ hop ๏ƒ˜๋ณต์ œ layer โ€ขARC์˜ ๊ฒฝ์šฐ CPU๋ฅผ ๋” ์‚ฌ์šฉํ•œ๋‹ค ๏ƒ˜Gateway ๏ƒ˜Replicator โ€ข์„ฑ๋Šฅ์ƒ์˜ ๋ณ‘๋ชฉ์€ ๋„คํŠธ์›Œํฌ์—์„œ ์ƒ๊น€ ๏ƒ˜๋„คํŠธ์›Œํฌ๋กœ ์ „์†ก๋˜๋Š” ๋ฐ์ดํ„ฐ์˜ ์–‘ ๏ƒ˜๋„คํŠธ์›Œํฌ๋กœ ์ „์†ก๋˜๋Š” packet์˜ ๊ฐœ์ˆ˜ (interrupt ์ฒ˜๋ฆฌ ๋Šฅ๋ ฅ) ๏ƒ˜RPS (Receive Packet Steering)/RFS (Receive Flow Steering)๋“ฑ์˜ ๋„คํŠธ์›Œํฌ ์ตœ์ ํ™” ์„ค์ •์ด ํ•„์š”ํ•จ
  • 29. ์„ฑ๋Šฅ - ARC Gateway Affinity PG 1 Master PGS PG 2 Slave PGS PG 3 Slave PGS PG 1 Slave PGS PG 2 Master PGS PG 3 Master PGS Gateway Gateway PG 4 Master PGS PG 5 Slave PGS PG 6 Slave PGS PG 4 Slave PGS PG 5 Master PGS PG 6 Master PGS Gateway Gateway Client (affinity) Client (no affinity) ๏ƒ˜ํด๋Ÿฌ์Šคํ„ฐ์˜ key mapping ์ •๋ณด๋ฅผ ํžŒํŠธ๋กœ ํ•ด์„œ ์ตœ์ ์˜ gateway๋ฅผ ์„ ํƒํ•˜๋„๋ก ํ•จ (๊ฐœ๋ฐœ ๋ฒ„์ „) ๏ƒ˜๋„คํŠธ์›Œํฌ ์‚ฌ์šฉ๋Ÿ‰์„ ์ตœ์ ํ™”
  • 30. ์„ฑ๋Šฅ ํ…Œ์ŠคํŠธ ํ™˜๊ฒฝ Gateway Gateway Gateway Gateway Gateway Gateway M S S M M S S M M S S M M S S M M S S M M S S M YCSB YCSB YCSB YCSB YCSB YCSB โ€ขLoad generator 6์žฅ๋น„, ํด๋Ÿฌ์Šคํ„ฐ 6๋Œ€ โ€ข24๊ฐœ์˜ Redis instance (master 12, slave 12) โ€ขYCSB ๏ƒ˜Scan ๋ช…๋ น ์ œ์™ธ (๋‹จ์ผ ํ‚ค sorted set ์‚ฌ์šฉ) ๏ƒ˜Driver๋Š” Jedis ๊ธฐ๋ฐ˜ (nBase-ARC java client, Jedis Client)
  • 31. ์‹œํ—˜ ๊ฒฐ๊ณผ - 1K 100% Write 0 50000 100000 150000 200000 250000 0 200 400 600 OPS (RC) OPS(ARC) 0 0.5 1 1.5 2 2.5 0 200 400 600 Latency (RC) (ms) Latency(ARC)(m s) โ€ขClient ๊ฐœ์ˆ˜๋ฅผ ๋งŽ์ด ๋Š˜๋ฆด ์ˆ˜ ์—†๋Š” ๋ฌธ์ œ๊ฐ€ ์žˆ์—ˆ์Œ (RC์šฉ Jedis) โ€ขCPU ์‚ฌ์šฉ๋Ÿ‰์€ RC (10%), ARC (20%) โ€ขRC๋Š” ํด๋ผ์ด์–ธํŠธ ๊ฐœ์ˆ˜๊ฐ€ ๋Š˜์–ด๋‚˜๋ฉด ์„ฑ๋Šฅ์ด ์ €ํ•˜ ๋œ๋‹ค ๏ƒ˜๊ฐ client๊ฐ€ Redis์— ์ง์ ‘ ์—ฐ๊ฒฐํ•˜๊ธฐ ๋•Œ๋ฌธ์— connection ๊ฐœ์ˆ˜๊ฐ€ ์ฆ๊ฐ€ โ€ขARC์˜ ์„ฑ๋Šฅ ์ตœ๋Œ€์น˜๊ฐ€ RC์˜ ์„ฑ๋Šฅ ์ตœ๋Œ€์น˜์— ๋ฏธ์น˜์ง€ ๋ชปํ•˜๋Š” ์ด์œ  ๏ƒ˜๋ณต์ œ layer์— ์˜ํ•ด์„œ ์ž‘์€ ํฌ๊ธฐ์˜ packet ์ „์†ก์ด ์ถ”๊ฐ€๋จ 85 %
  • 32. ์‹œํ—˜ ๊ฒฐ๊ณผ - 1K 100% Read โ€ขCPU ์‚ฌ์šฉ๋Ÿ‰์€ RC (10%), ARC (20%) โ€ขARC์˜ ๊ฒฝ์šฐ Consistent read ๋ฅผ ์œ„ํ•œ ๋ณต์ œ ์ƒ์˜ overhead ๏ƒ˜Operation ์ž์ฒด๋Š” ๋ณต์ œ๋กœ ์ „์†ก๋˜์ง€ ์•Š์ง€๋งŒ ์ˆœ์„œ๋ฅผ ๋งž์ถ”๊ธฐ ์œ„ํ•œ reference data๋Š” ์ „์†ก โ€ขRead offloading 0 100000 200000 300000 400000 500000 0 200 400 600 OPS (RC) OPS(ARC) 0 0.2 0.4 0.6 0.8 1 1.2 0 200 400 600 Latency (RC) (ms) Latency(ARC)( ms) 93 %
  • 33. ์‹œํ—˜ โ€“ ๊ฒฐ๋ก  โ€ขRC: ๊ณ ์„ฑ๋Šฅ+, ์žฅ์• /๋‹จ์ ˆ ๋ฐœ์ƒ ์‹œ ๋ฐ์ดํ„ฐ ์œ ์‹ค โ€ขARC: ๊ณ ์„ฑ๋Šฅ, DB
  • 34. 3. ๋ฐœ์ „ ๋ฐฉํ–ฅ ๋ฐ ์˜คํ”ˆ ์†Œ์Šค
  • 35. More Autonomous Cluster โ€ข๊ณ ์†์œผ๋กœ ๋™์ž‘ํ•˜๋Š” ์‹œ์Šคํ…œ์ด๊ธฐ ๋•Œ๋ฌธ์— ์‚ฌ๋žŒ์ด ์šด์˜์— ๊ฐœ์ž…ํ•ด์•ผ ํ•˜๋Š” ์ƒํ™ฉ์ด๋ฉด ์ด๋ฏธ ๋Œ€ํ˜• ์žฅ์•  ์ƒํ™ฉ โ€ขํ˜„์žฌ๋Š” ์žฅ์•  ๊ฐ์ง€ ๋ฐ ์ฒ˜๋ฆฌ๋งŒ ์ž๋™ํ™”๋จ. ๋”์šฑ ํ•„์š” โ€ข์žฅ๋น„ ๊ด€๋ฆฌ์ž (ARC0) ๏ƒผLocal repository management ๏ƒผProcess management ๏ƒผHeartbeat aggregation
  • 36. Resource Efficiency โ€ข์žฅ๋น„์˜ ํšจ์œจ์ ์ธ ์‚ฌ์šฉ์„ ์œ„ํ•ด ํ•œ ์žฅ๋น„์— ์—ฌ๋Ÿฌ process ๊ตฌ๋™ โ€ข์„œ๋กœ ๋‹ค๋ฅธ ํด๋Ÿฌ์Šคํ„ฐ์˜ ํ”„๋กœ์„ธ์Šค๊ฐ€ ๋Œ ์ˆ˜ ์žˆ์Œ โ€ขProcess (ํด๋Ÿฌ์Šคํ„ฐ) ์‚ฌ์ด์˜ ๊ฐ„์„ญ์ด ์—†๋„๋ก ์‹œ์Šคํ…œ ์ž์› ๊ด€๋ฆฌ ๏ƒ˜๋„คํŠธ์›Œํฌ, ๋””์Šคํฌ, CPU, ๋ฉ”๋ชจ๋ฆฌ โ€ข์žฅ๋น„ ๊ด€๋ฆฌ์ž (ARC0) ๏ƒผSystem resource management ๏ƒผSystem resource monitoring
  • 37. Global Management โ€ขGlobal ํ™˜๊ฒฝ์— ์—ฌ๋Ÿฌ zone ์ด ๊ตฌ์ถ•๋จ์— ๋”ฐ๋ผ ์ฒด๊ณ„์ ์ด๊ณ  ์ž๋™ํ™”๋œ ์šด์˜ ๋ฐฉ์‹์ด ํ•„์š”ํ•˜๋‹ค HUB -Zone registry -Resource (e.g. binary) repository -User account -Global management ZONE
  • 38. ์˜คํ”ˆ ์†Œ์Šค 2015 ์ค€๋น„๋˜๋Š” ๋Œ€๋กœ ์ˆœ์ฐจ์ ์œผ๋กœ ์˜คํ”ˆ ํ•  ์˜ˆ์ •