Amazon Aurora with PostgreSQL compatibility is a relational database managed service that combines the speed and availability of high-end commercial databases with the simplicity and cost-effectiveness of open-source PostgreSQL. This session highlights Aurora with PostgreSQL compatibility’s key capabilities, including low-latency read replicas and Multi-AZ deployments; reviews the architectural enhancements that contribute to Aurora’s improved scalability, availability, and durability; and digs into the latest feature releases. Finally, this session walks through techniques to migrate to Aurora.

2. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved.
Deep dive on Amazon Aurora
with PostgreSQL compatibility
Grant McAlister
Senior Principal Engineer
AWS
D A T 3 0 1

3. Amazon RDS PostgreSQL universe
Clients
RDS
PostgreSQL
Amazon
Aurora
PostgreSQL
EBS
Amazon
Aurora
storage
Version 9.6/10/11/12 – same extensions
Backup / Recovery – PITR
High availability and durability
Secure – IAM auth
Read replicas
Cross region snapshots
Scale compute – Online scale storage
Cross region replication
Outbound logical replication
Major version upgrade

4. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved.
Base architecture

5. Aurora storage and replicas
RW
Application Application
Write log
records
Aurora
storage
Availability Zone 3
Availability Zone 2
Availability Zone 1

6. Aurora storage and replicas
RW
Application Application
Write log
records
Read
blocks
Aurora
storage
Availability Zone 3
Availability Zone 2
Availability Zone 1

7. Aurora storage and replicas
RW
Application Application
Write log
records
Read
blocks
Aurora
storage
Availability Zone 3
Availability Zone 2
Availability Zone 1

8. Aurora storage and replicas
RW
Application Application
Write log
records
Read
blocks
Aurora
storage
Availability Zone 3
Availability Zone 2
Availability Zone 1

9. Aurora storage and replicas
RW
Application Application
Write log
records
Read
blocks
Aurora
storage
Availability Zone 3
Availability Zone 2
Availability Zone 1

10. RO
Application
Aurora storage and replicas
RW
Application
RO
Application
Async
Invalidation
& Update
Async
invalidation
& update
Write log
records
Read
blocks
Aurora
storage
RO
RO
RO
RO
Availability Zone 3
Availability Zone 2
Availability Zone 1

11. RO
Application
Aurora storage and replicas
RW
Application
RO
Application
Async
Invalidation
& Update
Async
invalidation
& update
Write log
records
Read
blocks
Aurora
storage
RO
RO
RO
RO
Availability Zone 3
Availability Zone 2
Availability Zone 1

12. RO
Application
Aurora storage and replicas
RW
Application
RO
Application
Async
Invalidation
& Update
Async
invalidation
& update
Write log
records
Read
blocks
RW
Aurora
storage
RO
RO
RO
RO
Availability Zone 3
Availability Zone 2
Availability Zone 1

13. Availability Zone 2
Availability Zone 1 Availability Zone 3
RO
Application
Fast clones
RW
Application
RW
Reporting
application
Read
blocks
Aurora
storage
Primary storage
Clone storage
Clone

14. Availability Zone 2
Availability Zone 1 Availability Zone 3
RO
Application
Fast clones
RW
Application
RW
Reporting
application
Read
blocks
Aurora
storage
Primary storage
Clone storage
Clone

15. Availability Zone 2
Availability Zone 1 Availability Zone 3
RO
Application
Fast clones
RW
Application
RW
Reporting
application
Read
blocks
Aurora
storage
Primary storage
Clone storage
Clone

16. Availability Zone 2
Availability Zone 1 Availability Zone 3
RO
Application
Fast clones
RW
Application
RW
Reporting
application
Write log
records
Read
blocks
Aurora
storage
Primary storage
Clone storage
Clone

17. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved.
Log-based storage

18. Concurrency: Remove log buffer
Queued work
Log buffer
PostgreSQL Aurora PostgreSQL
Storage
Queued work
Storage
Transaction
Write

19. Concurrency: Remove log buffer
Queued work
Log buffer
PostgreSQL Aurora PostgreSQL
Storage
Queued work
Storage
Transaction
Write

20. Concurrency: Remove log buffer
Queued work
Log buffer
PostgreSQL Aurora PostgreSQL
Storage
Queued work
Storage
Transaction
Write

21. Concurrency: Remove log buffer
Queued work
Log buffer
PostgreSQL Aurora PostgreSQL
Storage
Queued work
Storage
Transaction
Write

22. Concurrency: Remove log buffer
Queued work
Log buffer
PostgreSQL Aurora PostgreSQL
Storage
Queued work
Storage
Transaction
Write

23. Concurrency: Remove log buffer
Queued work
Log buffer
PostgreSQL Aurora PostgreSQL
Storage
Queued work
Storage
Transaction
Write

24. Concurrency: Remove log buffer
Queued work
Log buffer
PostgreSQL Aurora PostgreSQL
Storage
A Queued work
Storage
B
Transaction
Write

25. Concurrency: Remove log buffer
Queued work
Log buffer
PostgreSQL Aurora PostgreSQL
Storage
A
Queued work
Storage
B C D E
Transaction
Write

26. Concurrency: Remove log buffer
Queued work
Log buffer
PostgreSQL Aurora PostgreSQL
Storage
A
Queued work
Storage
B C D E
2 2 1 0 1
A B C D E
Durability
tracking
Transaction
Write

27. Concurrency: Remove log buffer
Queued work
Log buffer
PostgreSQL Aurora PostgreSQL
Storage
A
Queued work
Storage
B C D E
2 2 1 0 1
A B C D E
Durability
tracking
Transaction
Write
G F

28. Concurrency: Remove log buffer
Queued work
Log buffer
PostgreSQL Aurora PostgreSQL
Storage
A
Queued work
Storage
B C D E
2 2 1 0 1
A B C D E
Durability
tracking
Transaction
Write
G
F

29. Concurrency: Remove log buffer
Queued work
Log buffer
PostgreSQL Aurora PostgreSQL
Storage
A
Queued work
Storage
B C D E
2 2 1 0 1
A B C D E
Durability
tracking
Transaction
Write
G
F

30. Concurrency: Remove log buffer
Queued work
Log buffer
PostgreSQL Aurora PostgreSQL
Storage
A
Queued work
Storage
B C D E
4 3 4 2 4 1
A B C D E F
Durability
tracking
Transaction
Write
G
F

31. 6 5 6 3 5 2 0
A B C D E F G
Concurrency: Remove log buffer
Queued work
Log buffer
PostgreSQL Aurora PostgreSQL
Storage
A
Queued work
Storage
B C D E
Durability
tracking
Transaction
Write
G F

32. Aurora: Writing less
Aurora
Block in
memory
t-v1
Aurora
storage
Block in
memory
PostgreSQL
t-v1
t-v2
WAL
update t set y = 6
Amazon Simple Storage
Service (Amazon S3)

33. Aurora: Writing less
Aurora
Block in
memory
t-v1
Aurora
storage
Block in
memory
PostgreSQL
t-v1
t-v2
t-v1
t-v2
Full
block
WAL
update t set y = 6
Amazon Simple Storage
Service (Amazon S3)

34. Aurora: Writing less
Aurora
Block in
memory
t-v1
Aurora
storage
Block in
memory
PostgreSQL
t-v1
t-v2
t-v3
t-v1
t-v2
Full
block
t-v3
WAL
update t set y = 6
Amazon Simple Storage
Service (Amazon S3)

35. Aurora: Writing less
Aurora
Block in
memory
t-v1
Aurora
storage
Block in
memory
PostgreSQL
t-v1
t-v2
t-v3
Checkpoint
Datafile
t-v1
t-v2
Full
block
t-v3
WAL
Archive
update t set y = 6
Amazon Simple Storage
Service (Amazon S3)

36. Aurora: Writing less
Aurora
Block in
memory
t-v1
Aurora
storage
Block in
memory
PostgreSQL
t-v1
t-v2
t-v3
Checkpoint
Datafile
t-v1
t-v2
Full
block
t-v3
WAL
Archive
4K
4K
8K
update t set y = 6
Amazon Simple Storage
Service (Amazon S3)

37. Aurora: Writing less
Aurora
Block in
memory
t-v1
Aurora
storage
Block in
memory
PostgreSQL
t-v1
t-v2
t-v3
Checkpoint
Datafile
t-v1
t-v2
Full
block
t-v3
WAL
Archive
4K
4K
8K
update t set y = 6
Amazon Simple Storage
Service (Amazon S3)
recovery
in minutes

38. Aurora: Writing less
Aurora
update t set y = 6
Block in
memory
t-v1
Aurora
storage
Block in
memory
PostgreSQL
t-v1
t-v2
t-v3
Checkpoint
Datafile
t-v1
t-v2
Full
block
t-v3
WAL
Archive
4K
4K
8K
update t set y = 6
Amazon Simple Storage
Service (Amazon S3)
recovery
in minutes

39. Aurora: Writing less
Aurora
update t set y = 6
Block in
memory
t-v1
t-v2
Aurora
storage
t-v1
t-v2
Block in
memory
PostgreSQL
t-v1
t-v2
t-v3
Checkpoint
Datafile
t-v1
t-v2
Full
block
t-v3
WAL
Archive
4K
4K
8K
update t set y = 6
Amazon Simple Storage
Service (Amazon S3)
recovery
in minutes

40. Aurora: Writing less
Aurora
update t set y = 6
Block in
memory
t-v1
t-v2
t-v3
Aurora
storage
t-v1
t-v2
t-v3
No engine
checkpoint
=
no FPW
Block in
memory
PostgreSQL
t-v1
t-v2
t-v3
Checkpoint
Datafile
t-v1
t-v2
Full
block
t-v3
WAL
Archive
4K
4K
8K
update t set y = 6
Amazon Simple Storage
Service (Amazon S3)
recovery
in minutes

41. Aurora: Writing less
Aurora
update t set y = 6
Block in
memory
t-v1
t-v2
t-v3
Aurora
storage
t-v1
t-v2
t-v3
No engine
checkpoint
=
no FPW
Block in
memory
PostgreSQL
t-v1
t-v2
t-v3
Checkpoint
Datafile
t-v1
t-v2
Full
block
t-v3
WAL
Archive
4K
4K
8K
update t set y = 6
Amazon Simple Storage
Service (Amazon S3)
recovery
in minutes continuous
& parallel
coalesce
recovery in
seconds

42. Aurora
RW
Storage layer
Incoming queue Data
blocks
Update
queue
Hot log
Amazon S3
A

43. Aurora
RW
Storage layer
Incoming queue Data
blocks
Update
queue
Hot log
Amazon S3
A

44. Aurora
RW
Storage layer
Incoming queue Data
blocks
Update
queue
Hot log
Amazon S3
A

45. Aurora
RW
Storage layer
Incoming queue Data
blocks
Update
queue
Hot log
Amazon S3
A
C

46. Aurora
RW
Storage layer
Incoming queue Data
blocks
Update
queue
Hot log
Amazon S3
A
C

47. Aurora
RW
Storage layer
Incoming queue Data
blocks
Update
queue
Hot log
Amazon S3
A C

48. Aurora
RW
Storage layer
Incoming queue Data
blocks
Update
queue
Hot log
Peer storage
nodes
Amazon S3
A C

49. Aurora
RW
Storage layer
Incoming queue Data
blocks
Update
queue
Hot log
Peer storage
nodes
Amazon S3
A C
B

50. Aurora
RW
Storage layer
Incoming queue Data
blocks
Update
queue
Hot log
Peer storage
nodes
Amazon S3
A C
B

51. Aurora
RW
Storage layer
Incoming queue Data
blocks
Update
queue
Hot log
Peer storage
nodes
Amazon S3
A C
B
B C
A

52. Aurora
RW
Storage layer
Incoming queue Data
blocks
Update
queue
Hot log
Peer storage
nodes
Coalesce
Amazon S3
A C
B
A B C
B C
A

53. Aurora
RW
Storage layer
Incoming queue Data
blocks
Update
queue
Hot log
Peer storage
nodes
Coalesce
Amazon S3
A C
B
A B C
B C
A

54. Aurora backups
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

55. Aurora backups
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1

56. Aurora backups
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
16
15
13
12
11
10
8 8 8 8
13
2 2 2 2
4
5
6 6
7 7 7
8
2

57. Aurora backups
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
16
15
13
12
11
10
8 8 8 8
13
2 2 2 2
4
5
6 6
7 7 7
8
8
1 2 3 4 5 6 7
16
15
14
13
12
11
10
9
2

58. Aurora backups
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
16
15
13
12
11
10
8 8 8 8
13
2 2 2 2
4
5
6 6
7 7 7
8
2

59. Aurora backups
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
16
15
13
12
11
10
8 8 8 8
13
2 2 2 2
4
5
6 6
7 7 7
8
2 6
2

60. Aurora backups
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
16
15
13
12
11
10
8 8 8 8
13
2 2 2 2
4
5
6 6
7 7 7
8
8
1 2 3 4 5 6 7
16
15
14
13
12
11
10
9
2

61. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved.
Scaling

62. RO
Application
Aurora storage scaling
RW
Application
RO
Application
Async
invalidation
& update
Async
invalidation
& update
Write log
records
Read
blocks
Aurora
storage
Availability Zone 3
Availability Zone 2
Availability Zone 1

63. RO
Application
Aurora storage scaling
RW
Application
RO
Application
Async
invalidation
& update
Async
invalidation
& update
Write log
records
Read
blocks
Aurora
storage
Availability Zone 3
Availability Zone 2
Availability Zone 1

64. RO
Application
Aurora storage scaling
RW
Application
RO
Application
Async
invalidation
& update
Async
invalidation
& update
Write log
records
Read
blocks
Aurora
storage
Availability Zone 3
Availability Zone 2
Availability Zone 1
64TB

65. RO
Application
Aurora storage scaling
RW
Application
RO
Application
Async
invalidation
& update
Async
invalidation
& update
Write log
records
Read
blocks
Aurora
storage
Availability Zone 3
Availability Zone 2
Availability Zone 1
64TB
128TB

66. Partitions in PostgreSQL 12
Partitioned table "public.door_knocks"
Column | Type | Collation | Nullable | Default | Storage | Stats target | Description
------------+-----------------------------+-----------+----------+---------+----------+--------------+-------------
id | integer | | not null | | plain | |
knock_date | timestamp without time zone | | not null | | plain | |
city | character varying(255) | | not null | | extended | |
zipcode | character(5) | | not null | | extended | |
Partition key: RANGE (knock_date)
Partitions: door_knock_date_y2020103001 FOR VALUES FROM ('2020-10-30 01:00:00') TO ('2020-10-30 02:00:00'),
door_knock_date_y2020103002 FOR VALUES FROM ('2020-10-30 02:00:00') TO ('2020-10-30 03:00:00'),
door_knock_date_y2020103003 FOR VALUES FROM ('2020-10-30 03:00:00') TO ('2020-10-30 04:00:00')

67. Storage Management – dynamic resizing
new partitions
every hour

68. Storage Management – dynamic resizing
new partitions
every hour
drop
existing
create
new

69. Storage Management – dynamic resizing
new partitions
every hour
drop
existing
create
new
2 hour
spike

70. Storage Management – dynamic resizing
new partitions
every hour
drop
existing
create
new
2 hour
spike drop
existing
create
new

71. Storage Management – dynamic resizing
new partitions
every hour
drop
existing
create
new
2 hour
spike drop
existing
create
new
drop
the
spike

72. Storage Management – dynamic resizing
new partitions
every hour
drop
existing
create
new
2 hour
spike drop
existing
create
new
drop
the
spike
used space
inside the db
used storage
space
2X extra
storage
costs

73. Storage Management – dynamic resizing
new partitions
every hour
drop
existing
create
new
2 hour
spike drop
existing
create
new
drop
the
spike
used space
inside the db
used storage
space

74. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved.
Replication / Data flow

75. Logical replication support
Amazon Aurora Amazon Kinesis
Amazon EC2

76. Logical replication support
Amazon Aurora
Amazon RDS
Amazon Redshift
Amazon Simple Storage
Service (Amazon S3)
AWS Database
Migration Service
Amazon DynamoDB

77. Logical replication support
Amazon Aurora PostgreSQL
instance

78. Logical replication support
Amazon Aurora Amazon RDS

79. Logical replication support
Amazon Aurora Amazon Aurora

80. Data flow – PostgreSQL extensions
Amazon Aurora
PostgreSQL
instance

81. Data flow – PostgreSQL extensions
Amazon Aurora Amazon RDS

82. Data flow – PostgreSQL extensions
Amazon Aurora Amazon Redshift

83. Data flow – PostgreSQL extensions
Amazon Aurora
Amazon Simple Storage
Service (Amazon S3)
Amazon Aurora
Amazon SageMaker
Amazon Comprehend
AWS Lambda

84. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved.
Global DB –
Cross region replication

85. 12–300 ms
Cross region replicas: PostgreSQL
PostgreSQL
RW
EBS
PostgreSQL
RO
EBS
Update
Region A Region B

86. 12–300 ms
Cross region replicas: PostgreSQL
PostgreSQL
RW
EBS
PostgreSQL
RO
EBS
Update
Extra expense
Region A Region B

87. Replication
agents
Region B
Region A
Availability Zone 3
Availability Zone 1 Availability Zone 2
Availability Zone 3
Availability Zone 1 Availability Zone 2
Amazon Aurora Global Database
Aurora storage
RO
Application
RW
Application
RO
Application
Replication
servers Aurora storage

88. Replication
agents
Region B
Region A
Availability Zone 3
Availability Zone 1 Availability Zone 2
Availability Zone 3
Availability Zone 1 Availability Zone 2
Amazon Aurora Global Database
Aurora storage
RO
Application
RW
Application
RO
Application
Replication
servers Aurora storage

89. Replication
agents
Region B
Region A
Availability Zone 3
Availability Zone 1 Availability Zone 2
Availability Zone 3
Availability Zone 1 Availability Zone 2
Amazon Aurora Global Database
Aurora storage
RO
Application
RW
Application
RO
Application
Replication
servers Aurora storage

90. Replication
agents
Region B
Region A
Availability Zone 3
Availability Zone 1 Availability Zone 2
Availability Zone 3
Availability Zone 1 Availability Zone 2
Amazon Aurora Global Database
Aurora storage
RO
Application
RW
Application
RO
Application
Replication
servers Aurora storage

91. Replication
agents
Region B
Region A
Availability Zone 3
Availability Zone 1 Availability Zone 2
Availability Zone 3
Availability Zone 1 Availability Zone 2
Amazon Aurora Global Database
Aurora storage
RO
Application
RW
Application
RO
Application
Replication
servers Aurora storage

92. Replication
agents
Region B
Region A
Availability Zone 3
Availability Zone 1 Availability Zone 2
Availability Zone 3
Availability Zone 1 Availability Zone 2
Amazon Aurora Global Database
Aurora storage
RO
Application
RW
Application
RO
Application
Replication
servers Aurora storage
DR

93. Replication
agents
Region B
Region A
Availability Zone 3
Availability Zone 1 Availability Zone 2
Availability Zone 3
Availability Zone 1 Availability Zone 2
Amazon Aurora Global Database
Aurora storage
RO
Application
RW
Application
RO
Application
Replication
servers Aurora storage
RO

94. Replication
agents
Region B
Region A
Availability Zone 3
Availability Zone 1 Availability Zone 2
Availability Zone 3
Availability Zone 1 Availability Zone 2
Amazon Aurora Global Database
Aurora storage
RO
Application
RW
Application
RO
Application
Replication
servers Aurora storage
RO

95. Replication
agents
Region B
Region A
Availability Zone 3
Availability Zone 1 Availability Zone 2
Availability Zone 3
Availability Zone 1 Availability Zone 2
Amazon Aurora Global Database
Aurora storage
RO
Application
RW
Application
RO
Application
Replication
servers Aurora storage
RO
Application Application
RO
Application
RO

96. Replication
agents
Region B
Region A
Availability Zone 3
Availability Zone 1 Availability Zone 2
Availability Zone 3
Availability Zone 1 Availability Zone 2
Amazon Aurora Global Database
Aurora storage
RO
Application
RW
Application
RO
Application
Replication
servers Aurora storage
RO
Application Application
RO
Application
RO

97. Replication
agents
Region B
Region A
Availability Zone 3
Availability Zone 1 Availability Zone 2
Availability Zone 3
Availability Zone 1 Availability Zone 2
Amazon Aurora Global Database
Aurora storage
RO
Application
RW
Application
RO
Application
Replication
servers Aurora storage
RO
Application Application
RO
Application
RO

98. Replication
agents
Region B
Region A
Availability Zone 3
Availability Zone 1 Availability Zone 2
Availability Zone 3
Availability Zone 1 Availability Zone 2
Amazon Aurora Global Database
Aurora storage
RO
Application
RW
Application
RO
Application
Replication
servers Aurora storage
RO
Application Application
RO
Application
RO

99. Replication
agents
Region B
Region A
Availability Zone 3
Availability Zone 1 Availability Zone 2
Availability Zone 3
Availability Zone 1 Availability Zone 2
Amazon Aurora Global Database
Aurora storage
RO
Application
RW
Application
RO
Application
Replication
servers Aurora storage
RO
Application Application
RO
Application
RO

100. Region B
Region A
Availability Zone 3
Availability Zone 1 Availability Zone 2
Availability Zone 3
Availability Zone 1 Availability Zone 2
Amazon Aurora Global Database
Aurora storage
RO
Application
RW
Application
RO
Application
Aurora storage
RO
Application Application
RO
Application
RO
RW

101. Amazon Aurora Global Database
Region A
Availability Zone 3
Availability Zone 1 Availability Zone 2
Aurora storage
RO
Application
RW
Application
RO
Application
Replication
servers
Region B
Availability Zone 3
Availability Zone 1 Availability Zone 2
Replication
agents Aurora storage
R
O
Application Application
R
O
Application
R
O
Region C
Availability Zone 3
Availability Zone 1 Availability Zone 2
Replication
agents Aurora storage
R
O
Application Application
R
O
Region D
Availability Zone 3
Availability Zone 1 Availability Zone 2
Replication
agents Aurora storage

102. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved.
Performance

103. Non-uniform memory access
R5 instance
Memory
Socket 1
Memory
Socket 2
NUMA
Local access Remote access

104. Graviton2 – Uniformity
Memory
Socket 1
R6g instance
Local access

105. Graviton2 – vCPU
R5 instance
R6g instance

106. Graviton2 – vCPU
R5 instance
R6g instance

107. Graviton2 – vCPU
R5 instance
R6g instance

108. Graviton2 – vCPU
R5 instance
R6g instance

109. 0
25
50
75
100
125
1 2 4
Queries
Per
Second
(QPS)
Connections
1000 row in memory range scan with 3-level nested loop
r6g.large r5.large
Graviton2

110. Graviton2
0
5,000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
45,000
50,000
0 10 20 30 40 50 60
nopm
# virtual users
HammerDB – 16 warehouses
r6g.xlarge r5.xlarge

111. Graviton2
-
500
1,000
1,500
2,000
2,500
3,000
3,500
1 2 4 8 16 32 64 128 256
Queries
Per
Second
(QPS)
Connections
1000 row in memory range scan with 3-level nested loop
r6g.16xlarge r5.16xlarge r5.24xlarge

112. Application
Aurora – Heterogeneous clusters
Application Application
RO
Aurora
storage
Availability Zone 3
Availability Zone 2
Availability Zone 1
RO
RW

113. Application
Aurora – Heterogeneous clusters
Application Application
RO
Aurora
storage
Availability Zone 3
Availability Zone 2
Availability Zone 1
RO
RW modify

114. Application
Aurora – Heterogeneous clusters
Application Application
RO
Aurora
storage
Availability Zone 3
Availability Zone 2
Availability Zone 1
RO
RW

115. Application
Aurora – Heterogeneous clusters
Application Application
RO
Aurora
storage
Availability Zone 3
Availability Zone 2
Availability Zone 1
RO RW
failover

116. Application
Aurora – Heterogeneous clusters
Application Application
RO
Aurora
storage
Availability Zone 3
Availability Zone 2
Availability Zone 1
RO RW
modify
modify

117. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved.
Migration

118. Methods
• AWS Database Migration Service (AWS DMS)
• PostgreSQL: pg_dump/pg_restore
• PostgreSQL Logical Replication (including pglogical)
• Amazon RDS PostgreSQL: Snapshot import
• Amazon RDS PostgreSQL: Read replica
Migration to Aurora

119. Migration: Read replica
Amazon RDS
PostgreSQL instance
Service
--replication-source-identifier

120. Migration: Read replica
Snapshot Amazon Aurora
PostgreSQL instance
Amazon RDS
PostgreSQL instance
Service
--replication-source-identifier

121. Migration: Read replica
Catchup via PostgreSQL asynchronous replication
Amazon Aurora
PostgreSQL instance
Amazon RDS
PostgreSQL instance
Service

122. Migration: Read replica
Catchup via PostgreSQL asynchronous replication
Amazon Aurora
PostgreSQL instance
Amazon RDS
PostgreSQL instance
Service

123. Migration: Read replica
Amazon Aurora
PostgreSQL instance
Amazon RDS
PostgreSQL instance
Service
promote-read-replica-db-cluster
--db-cluster-identifier

124. Migration: Read replica
Amazon Aurora
PostgreSQL instance
Service

125. Thank you!
© 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved.