dataflow with sources S1, S2, … Sn and rates λ1, λ2, … λn identify the minimum parallelism πi per operator i, such that the physical dataflow can sustain all source rates. S1 S2 λ1 λ2 S1 S2 π=2 serialization send message waiting waiting 13 ??? Vasiliki Kalavri | Boston University 2020 14 o1 src o2 back-pressure target: 40 rec/s 10 rec/s 100 rec/s Which operator is the bottleneck? What if Boston University 2020 14 o1 src o2 back-pressure target: 40 rec/s 10 rec/s 100 rec/s Which operator is the bottleneck? What if we scale ο1 x 4? How much to scale ο2? o1 cannot keep up waiting for

. . . . . . . . . . . . . . . . . 22 1.3.1.1 O1: Scala Dependency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 1.3.1.2 O2: Java gateway process exited before sending its port number . . . . . . . . . . . . . . . . . . . 24 1.3.2.1 O1: How to prepare Python Virtual Environment . . . . . . . . . . . . . . . . . . . 24 1.3.2.2 O2: How to add Python Files . . . . . . . . . . . . . . . . . . . . 25 1.3.3.1 O1: InaccessibleObjectException: Unable to make field private final byte[] java.lang.String.value accessible: module java.base does not “opens java.lang” to unnamed module @4e4aea35

. . . . . . . . . . . . . . . . . 22 1.3.1.1 O1: Scala Dependency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 1.3.1.2 O2: Java gateway process exited before sending its port number . . . . . . . . . . . . . . . . . . . 24 1.3.2.1 O1: How to prepare Python Virtual Environment . . . . . . . . . . . . . . . . . . . 24 1.3.2.2 O2: How to add Python Files . . . . . . . . . . . . . . . . . . . . 25 1.3.3.1 O1: InaccessibleObjectException: Unable to make field private final byte[] java.lang.String.value accessible: module java.base does not “opens java.lang” to unnamed module @4e4aea35

service with any language . . . . . . . . . . . . . . . . . . . 25 2.2.1 Raw web service example for Java with Axis . . . . . . . . . . . . . . . 25 2.2.2 Raw web service example for Perl . . . . . . . . . . . . . . . . . . . . . . . . 293 9 VirtualBox external authentication modules 294 10 Using Java API 296 10.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . toolkit that understands WSDL. These days, that includes most programming languages that are available: Java, C++, .NET, PHP, Python, Perl and probably many more. All of this is explained in detail in subsequent

service with any language . . . . . . . . . . . . . . . . . . . 25 2.2.1 Raw web service example for Java with Axis . . . . . . . . . . . . . . . 25 2.2.2 Raw web service example for Perl . . . . . . . . . . . . . . . . . . . . . . . . . . 293 9 VirtualBox external authentication modules 294 10 Using Java API 296 10.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . toolkit that understands WSDL. These days, that includes most programming languages that are available: Java, C++, .NET, PHP, Python, Perl and probably many more. All of this is explained in detail in subsequent

service with any language . . . . . . . . . . . . . . . . . . . 24 2.2.1 Raw web service example for Java with Axis . . . . . . . . . . . . . . . 24 2.2.2 Raw web service example for Perl . . . . . . . . . . . . . . . . . . . . . . . . 278 9 VirtualBox external authentication modules 279 10 Using Java API 281 10.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . toolkit that understands WSDL. These days, that includes most programming languages that are available: Java, C++, .NET, PHP, Python, Perl and probably many more. All of this is explained in detail in subsequent

service with any language . . . . . . . . . . . . . . . . . . . 32 2.2.1 Raw web service example for Java with Axis . . . . . . . . . . . . . . . 33 2.2.2 Raw web service example for Perl . . . . . . . . . . . . . . . . . . . . . . . 419 10 VirtualBox external authentication modules 421 11 Using Java API 423 11.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . toolkit that understands WSDL. These days, that includes most programming languages that are available: Java, C++, .NET, PHP, Python, Perl and probably many more. All of this is explained in detail in subsequent

service with any language . . . . . . . . . . . . . . . . . . . 32 2.2.1 Raw web service example for Java with Axis . . . . . . . . . . . . . . . 32 2.2.2 Raw web service example for Perl . . . . . . . . . . . . . . . . . . . . . . . 416 10 VirtualBox external authentication modules 418 11 Using Java API 420 11.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . toolkit that understands WSDL. These days, that includes most programming languages that are available: Java, C++, .NET, PHP, Python, Perl and probably many more. All of this is explained in detail in subsequent

service with any language . . . . . . . . . . . . . . . . . . . 30 2.2.1 Raw web service example for Java with Axis . . . . . . . . . . . . . . . 30 2.2.2 Raw web service example for Perl . . . . . . . . . . . . . . . . . . . . . . . 381 10 VirtualBox external authentication modules 383 11 Using Java API 385 11.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . toolkit that understands WSDL. These days, that includes most programming languages that are available: Java, C++, .NET, PHP, Python, Perl and probably many more. All of this is explained in detail in subsequent

service with any language . . . . . . . . . . . . . . . . . . . 30 2.2.1 Raw web service example for Java with Axis . . . . . . . . . . . . . . . 30 2.2.2 Raw web service example for Perl . . . . . . . . . . . . . . . . . . . . . . . 381 10 VirtualBox external authentication modules 383 11 Using Java API 385 11.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . toolkit that understands WSDL. These days, that includes most programming languages that are available: Java, C++, .NET, PHP, Python, Perl and probably many more. All of this is explained in detail in subsequent