GotCloud: Creating a New Pipeline

Creating a New BAM Processing Pipeline

GotCloud allows you to configure new basic BAM processing pipelines via configuration.

To define new processing pipelines, you will use Configuration sections to define both the pipeline and each of the steps. So first you need to understand how configuration sections work.

GotCloud Configuration Sections

GotCloud configuration files can be broken into sections:

• Section names are specified between square brakets ([])

  [sectionName]

  • Any configuration settings specified after the section header belong to that section
  • A section can be specified multiple times in the file and the configuration settings are accumulated
  • To access a value for a key defined in another section, use $(otherSectionName/keyName)

• If a section is not specified, the configuration settings belong to the global section
  • The global section does not need to be specified at the beginning of the file (it is the default section).
  • Additional global settings can be set later in the file after other settings, by defining the explicitly section:

    [global]

• Sections can be derived from another section
  • All sections automatically derive from [global]
  • A derived section inherits all the configuration settings from its parent sections
    • Parent settings are overridden by redefining the configuration key/value pair
  • A parent section is specified following a semicolon : on the section definition line:

    [childSectionName] : parentSectionName

• Section specific configuration settings are specified on the lines following the section definition:

  [section1]
  KEY1 = VAL1
  KEY2 = VAL2
  
  [section2]
  KEY1 = VAL1_2
  KEY3 = VAL3

Defining a New Pipeline

1. Define a new configuration section for your pipeline
   • Example:

   [pipelineName]

2. Define the steps in this pipeline using the key STEPS under that section
   • Example:

   [pipelineName]
   STEPS = stepName1 stepName2 stepName3

   • Note: each step must have its own configuration section
3. Create a section for each step
   • Example:

     [stepName1]

   1. Set required keys for each step:
      1. DEPEND - dependencies for this step
         Valid Values (separate multiple dependencies with a space):

         • BAM
         • Name of step that must complete prior to this step
      2. OUTPUT - name of output file
      3. CMD - command for running the step