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Amazon DynamoDBYuko MoriSolutions ArchitectAmazon Data Services
Japan K.K.
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SierPLPM
AWS
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Agenda
DyanamoDB Table, API, Data Type Indexes Scaring & DynamoDB
Streams
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DyanamoDB
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Amazon DynamoDB Amazon.comRDBMS
RDBMSDynamo
HW
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Amazon DynamoDB NoSQL
3x API
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Tables, API, Data Types
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Table tableitems
attributes
HashKey
RangeKey
1:NQuery
==, , >=,
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CreateTable UpdateTable DeleteTable DescribeTable ListTables
GetItem PutItem UpdateItem DeleteItem
Query Scan
BatchGetItem BatchWriteItem
Liststreams DescribeStream GetShardIterator GetRecords
Table API
Streams API
DynamoDB
In preview
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AWS SDKs and CLI
SDKCLI
Java Python PHP .NET Ruby nodeJS
iOS AndroidJavascriptin the Browser AWS CLI
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Data Types
String (S) Number (N) Binary (B)
String Set (SS) Number Set (NS) Binary Set (BS)
Boolean (BOOL) Null (NULL) List (L) Map (M)
JSON
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Document (JSON)
(M, L, BOOL, NULL) JSON
Document SDKs JSONJSON Java, JavaScript, Ruby, .NET
Javascript DynamoDBstring Snumber Nboolean BOOLnull NULLarray
Lobject M
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00 55 A954 AA FF
Hash Table Hash key ()
00 FF
Id = 1Name = Jim
Hash (1) = 7B
Id = 2Name = AndyDept = EnggHash (2) = 48
Id = 3Name = KimDept = Ops
Hash (3) = CD
Key Space
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3
Id = 2Name = AndyDept = Engg
Id = 3Name = KimDept = Ops
Id = 1Name = Jim
Id = 2Name = AndyDept = Engg
Id = 3Name = KimDept = Ops
Id = 1Name = Jim
Id = 2Name = AndyDept = Engg
Id = 3Name = KimDept = Ops
Id = 1Name = Jim
Replica 1
Replica 2
Replica 3
Partition 1 Partition 2 Partition N
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Hash-Range Table Hash + Range Hash keyRange key
Hash KeyLocal Secondary Indexes
00:0 FF:
Hash (2) = 48
Customer# = 2Order# = 10Item = Pen
Customer# = 2Order# = 11Item = Shoes
Customer# = 1Order# = 10Item = Toy
Customer# = 1Order# = 11Item = Boots
Hash (1) = 7B
Customer# = 3Order# = 10Item = Book
Customer# = 3Order# = 11Item = Paper
Hash (3) = CD
55 A9:54: AAPartition 1 Partition 2 Partition 3
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DynamoDB
Write Ack
Read
Consistent Read ReadWrite
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Indexes
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Local Secondary Index (LSI) Range keykey Hash key 10 GB
A1(hash)
A3(range)
A2(table key)
A1(hash)
A2(range)
A3 A4 A5
LSIs A1(hash)
A4(range)
A2(table key)
A3(projected)
Table
KEYS_ONLY
INCLUDE A3
A1(hash)
A5(range)
A2(table key)
A3(projected)
A4(projected) ALL
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Global Secondary Index (GSI) Hash Key Hash Key
A1(hash)
A2 A3 A4 A5
GSIs A5(hash)
A4(range)
A1(table key)
A3(projected)
Table
INCLUDE A3
A4(hash)
A5(range)
A1(table key)
A2(projected)
A3(projected) ALL
A2(hash)
A1(table key) KEYS_ONLY
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GSI
Table
Primary tablePrimary tablePrimary tablePrimary table
Global Secondary Index
Client
2. Update(in progress)
GSI
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Scaling
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Scaling
DynamoDB
1 400 KB local secondary index 10GB
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Read Capacity Units (RCU) 1 x (4 KB ) 2
11.2KB(1.2/ 4 = 0.3 1 )1000/1000 1 = 1000 RCU
2:4.5KB (4.5 / 41.1 2 ) 1000/1000 2 = 2000 RCU1000 2 = 1000
RCU
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Write Capacity Units (WCU)
1 x (1 KB ) 1KB
1512B(0.512/ 1 0.5 1 ) 1000/1000 1 = 1000 WCU
2:2.5KB (2.5 / 1 = 2.5 3 ) 1000/1000 3 = 3000 WCU
RCU WCU
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CloudWatch
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DynamoDB
partition 1 ..N
partitions1 .. N
table
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# ( )
= 678 89:;
