Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
AWS DynamoDB Accelerator (DAX) 101
Search
Ken Wagatsuma
February 14, 2020
Programming
2
7.2k
AWS DynamoDB Accelerator (DAX) 101
Introduction to AWS DynamoDB Accelerator (DAX)
Ken Wagatsuma
February 14, 2020
Tweet
Share
More Decks by Ken Wagatsuma
See All by Ken Wagatsuma
Pregel Graph Compute Engines - Supersteps Exampls
kenju
0
210
Kafka on Kubernetes with Strimzi
kenju
0
160
Moden browser introduction
kenju
1
410
Cookpad summer internship 2019 - API
kenju
0
10k
Introduction to Design Patterns
kenju
0
83
GraphQL Asia 2019 "Re-architecture of a decade-old app with BFF/GraphQL"
kenju
0
9k
Introduction to TypeScript
kenju
0
730
Introduction to Programmatic Ad
kenju
0
260
社内管理システムのための技術選定
kenju
0
760
Other Decks in Programming
See All in Programming
新世界の理解
koriym
0
130
オホーツクでコミュニティを立ち上げた理由―地方出身プログラマの挑戦 / TechRAMEN 2025 Conference
lemonade_37
1
450
JetBrainsのAI機能の紹介 #jjug
yusuke
0
190
LLMは麻雀を知らなすぎるから俺が教育してやる
po3rin
3
2k
Flutterと Vibe Coding で個人開発!
hyshu
1
230
Workers を定期実行する方法は一つじゃない
rokuosan
0
140
QA x AIエコシステム段階構築作戦
osu
0
250
Flutter로 Gemini와 MCP를 활용한 Agentic App 만들기 - 박제창 2025 I/O Extended Seoul
itsmedreamwalker
0
120
あまり知られていない MCP 仕様たち / MCP specifications that aren’t widely known
ktr_0731
0
240
管你要 trace 什麼、bpftrace 用下去就對了 — COSCUP 2025
shunghsiyu
0
340
技術的負債で信頼性が限界だったWordPress運用をShifterで完全復活させた話
rvirus0817
0
760
11年かかって やっとVibe Codingに 時代が追いつきましたね
yimajo
1
250
Featured
See All Featured
JavaScript: Past, Present, and Future - NDC Porto 2020
reverentgeek
50
5.5k
Scaling GitHub
holman
461
140k
What’s in a name? Adding method to the madness
productmarketing
PRO
23
3.6k
Stop Working from a Prison Cell
hatefulcrawdad
271
21k
Code Reviewing Like a Champion
maltzj
524
40k
Building an army of robots
kneath
306
45k
The Web Performance Landscape in 2024 [PerfNow 2024]
tammyeverts
8
750
Put a Button on it: Removing Barriers to Going Fast.
kastner
60
3.9k
A better future with KSS
kneath
239
17k
Typedesign – Prime Four
hannesfritz
42
2.7k
Done Done
chrislema
185
16k
RailsConf & Balkan Ruby 2019: The Past, Present, and Future of Rails at GitHub
eileencodes
139
34k
Transcript
DAX 101 1 2020/2/15 Kenju Wagatsuma
DAX Wrap Up 2
DAX is… DynamoDB-specific in-memory cache store 3
[DAX] Glossary of Terms 4 5FSN %FTDSJQUJPO /PEFT "OPEFJTUIFNJOJNVNDPNQPOFOUGPSB%"9DMVTUFSl1SJNBSZOPEFzIBOEMFSFBE
XSJUFSFRVFTUTBOElSFQMJDBOPEFTzPOMZIBOEMFSFBESFRVFTUT $MVTUFST "DMVTUFSJTDPNQPTFEGSPN OPEFT 1BSBNFUFS(SPVQT :PVDBODIBOHF55-CZTFUUJOHDVTUPN1BSBNFUFS(SPVQT
[DAX] Comparison to other cache store 5 %"9 &MBTUJDBDIFNFNDBDIFE JONFNPSZ
.BOBHFE ✅ ✅ 4IBSFEDBDIF ✅ ✅ #BDLFOEEBUBTPVSDF %ZOBNP%#POMZ BOZUIJOH .Z42- %JTL 31$ FUD .FUSJDT ✅ ✅ 55- ⚠ HMPCBM55- ✅ ⚠ IBSEXPSLSFRVJSFE 1FSGPSNBODF ЖdNT dNT ЖdЖ
[DAX] Single-leader Replication 6 +3 nodes for different Multi-A/Z for
production Background replication (eventually consistent model) Single “primary node” handles all write requests
Subnet C Subnet B DAX Cluster Subnet A [DAX] Single-leader
Replication - Write 7 Primary Replica Replica
DAX Cluster [DAX] Single-leader Replication - Write 8 Primary Replica
Replica Application DynamoDB Table DynamoDB Table Write Read
DAX Cluster [DAX] Single-leader Replication - Replicate 9 Primary Replica
Replica Application DynamoDB Table DynamoDB Table Write Read
DAX Cluster [DAX] Single-leader Replication - Read 10 Primary Replica
Replica Application DynamoDB Table DynamoDB Table Write Read
[DAX] Cache Algorithm 11 Least Recently Used (LRU) cache Negative
cache also implemented Eviction happens when items are taken & cache is full Global Time-To-Live (TTL)
[DAX] Item Cache / Query Cache 12 Item Cache Query
Cache Operation GetItem / BatchGetItem Query / Scan Metrics ItemCacheHits/ItemCacheMisses QueryCacheHits/QueryCacheMisses ScanCacheHits/ScanCacheMisses
[DAX] Write Strategy - Write-Through 13 #write #read Application DAX
DynamoDB Application DAX DynamoDB
[DAX] Write Strategy - Write-Around 14 #write #read Application DynamoDB
Application DAX DynamoDB
[DAX] Write Strategy 15 8SJUF5ISPVHI 8SJUF"SPVOE 1SPT 4ZODISPOJ[FEJUFNTCFUXFFO%"9 BOE%ZOBNP%# 8SJUFDBOTDBMF
FHCVMLVQEBUF $POT ☹8SJUFPQFSBUJPOIBTPWFSIFBE ☹*UFNTDBOCFJODPOTJTUFOU JGPUIFS BQQXSJUFUP%ZOBNP%#EJSFDUMZ ☹&WFOUVBMMZ$POTJTUFOU JUFNTJO%"9 OPEFTDBOCFPVUEBUFE
[DAX] Within VPC + Multi-A/Z 16
[DAX] Limitation 17 Maximum nodes is 10 (1 primary node
+ ~9 replica nodes) Maximum nodes is 50 per Region. Maximum Parameter Groups is 20 per Region Maximum DAX Subnet Groups is 50 per Region. Maximum subnets per groups is 20.
Monitoring 18
[Monitoring] CloudWatch Metrics 19 NFUSJDT EFTDSJQUJPO $166UJMJ[BUJPO PG$16VUJMJ[BUJPOUTNBMMVTFW$16 ⚠:PVOFFEUPTDBMFVQJGUIJTNFUSJDTJTTBUVSBUFE *UFN$BDIF)JUT
*UFN$BDIF.JTTFT $BMDVMBUF$BDIF)JU3BUJP GSPNUIFTFNFUSJDT ⚠*UFN$BDIF2VFSZ$BDIF
[Monitoring] CloudWatch Metrics 20 NFUSJDT EFTDSJQUJPO 5ISPUUMJOH3FRVFTU$PVOU PGSFRVFTUTUISPUUMFECZUIFOPEFPSDMVTUFS ⚠5ISPUUMFEBU%"95ISPUUMFEBU%ZOBNP%# 'BJMFE3FRVFTU$PVOU
PGSFRVFTUTUIBUSFTVMUFEJOBOFSSPSSFQPSUFE ⚠&SSPS3FR$PVOU5ISPUUMFE 'BJMFE
[Monitoring] CloudWatch Metrics 21 NFUSJDT EFTDSJQUJPO &WJDUFE4J[F ⚠*G$BDIF)JU3BUJP&WJDUFE4J[FJTHSPXJOH UIF XPSLJOHTFUNJHIUJODSFBTF4IPVMEDPOTJEFSTDBMFVQ
$MJFOU$POOFDUJPOT PGTJNVMUBOFPVTDPOOFDUJPOTGSPNDMJFOUT ⚠$MJFOU$PO$PVOU㲈PG3VOOJOH5BTLT
[Monitoring] Grafana 22
[Monitoring] SLI/SLO 23
Alerting 24
[Alerting] CW Alarm - Infrastructure 25 CW Alarm SNS Topic
Lambda Slack
[Alerting] CW Alarm - CPUUtilization 26
[Alerting] CW Alarm - Cache Hit Ratio 27 ItemCacheHitRatio =
ItemCacheHits / ( ItemCacheHits + ItemCacheMisses )
[Alerting] CW Alarm - Cache Hit Ratio 28
[Alerting] DAX Events - Infrastructure 29 DAX Event SNS Topic
Lambda Slack
[Alerting] DAX Events - Infrastructure 30 failure/success in adding a
node changes to the security groups