Files
doris/docs
Mingyu Chen 45df6aae08 Fix some routine load bugs (#2093)
Mainly fix the following issues:

1. A null pointer exception is raised when a database or table is dropped. The expected behavior is that the routine load job is stopped.

2. Memory leaks. Batch routine load task submissions are no longer performed, and modifications are submitted separately for each task.

3. Unreasonable task timeout.
    Routine load tasks should not be queued in the BE thread pool for execution. The task sent to the BE should be executed immediately, otherwise the task in the FE will be timeout first. Eventually leads to constant timeout for all subsequent tasks.

4. All routine load job should be scheduled once it being submitted. Not waiting the available BE slot. Otherwise, all later submitted jobs may not be scheduled forever.
2019-10-31 21:53:03 +08:00
..

Philosophy

write once, use everywhere

Documentations will be written once, and will be converted to other format according to different application scenarios.

Implementation

         +---------------+
         | Documentation |
         +-------+-------+
                 |
         +-------+-------+
         |  Doc Builder  |
         +-------+-------+
                 |
    +--------------------------------+
    |            |                   |
+---+---+    +---+----+        +-----+----+
|  PDF  |    |  HTML  |  ....  | Help Doc |
+-------+    +--------+        +----------+

Documentation:Text contents which is written by human. And this is the only place for documentation. Doc Builder: Tools that convert documentations to other format, such as PDF, HTML. There could be many tools, and we can use different tools to convert documentation to different formats.

Organization

docs/documentation: Root directory for documentation. And for different languages, there is a root directory for it. For example, docs/documentation/cn is the Chinese documentation's root directory. docs/scripts: Place of Doc Builder. docs/resources: Resources that are referenced in documentation, such as pictures. docs/website: A website for documentations built with Sphinx using a theme provided by Read-the-Docs.

Constraints

  1. All documents are written in Markdown format, and file name is end with ".md".
  2. All documents are started with level 1 title # Title, and should have only one level 1 title.
  3. Names of file and directory are in lowercase letters, and use dashes as separator.
  4. Documentation can be constructed as a directory or a single Markdown file, these two formats equal with each other in logical. Relationship is represented by parent-child directory in directory format, and by title level in file format. It is recommended to use directory format to manage a large documentation, because it is easy to maintain.
  5. A directory corresponds to a title, and readme.md in this directory is its content. Other documents in this directory is its sub-sections.
  6. For manual like section, such as function description, there should be Description, Syntax, Examples section in documents.

Level Directories

  1. doris-concepts
  2. installing
  3. getting-started
  4. administrator-guide
  5. sql-references
  6. best-practices
  7. internals
  8. community

Each directory, or its sub directories should contain a file index.rst, for constructing the navibar of the website. For example:

documentation/
└── cn
    ├── administrator-guide
    │   ├── index.rst
    │   ├── http-actions
    │   │   └── index.rst
    │   ├── load-data
    │   │   ├── index.rst
    │   ├── operation
    │   │   ├── index.rst
    ├── extending-doris
    │   ├── index.rst
    └── sql-reference
        ├── index.rst
        │   ├── date-time-functions
        │   │   ├── index.rst

Docs Styles

There are some styles need to be followed.

SQL-Statement

Docs under documentation/cn/sql-reference/sql-statements/ must obey the following style

# TITLE(capital)

## description

    The description of this doc. The "## description" must be reserved, with a following empty line.

## keyword

    The keyword of this doc. Usually, this can be the title of this doc.
    The "## keyword" must  be reserved, with a following empty line.