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Gian Merlino de5a4bafcb
Zero-copy local deep storage. (#13394) 
* Zero-copy local deep storage.

This is useful for local deep storage, since it reduces disk usage and
makes Historicals able to load segments instantaneously.

Two changes:

1) Introduce "druid.storage.zip" parameter for local storage, which defaults
   to false. This changes default behavior from writing an index.zip to writing
   a regular directory. This is safe to do even during a rolling update, because
   the older code actually already handled unzipped directories being present
   on local deep storage.

2) In LocalDataSegmentPuller and LocalDataSegmentPusher, use hard links
   instead of copies when possible. (Generally this is possible when the
   source and destination directory are on the same filesystem.)
 		2022-12-12 17:28:24 -08:00
..
core fix: update footer copyright year (#12594) 2022-06-13 16:29:58 -07:00
i18n Various documentation updates. (#13107) 2022-09-16 21:58:11 -07:00
pages/en Docusaurus build framework + ingestion doc refresh. (#8311) 2019-08-20 21:48:59 -07:00
script Docs: fix doc search (#13164) 2022-10-03 16:48:13 -07:00
scss Docs: fix doc search (#13164) 2022-10-03 16:48:13 -07:00
static Docs: fix doc search (#13164) 2022-10-03 16:48:13 -07:00
.gitignore Docusaurus build framework + ingestion doc refresh. (#8311) 2019-08-20 21:48:59 -07:00
.spelling Zero-copy local deep storage. (#13394) 2022-12-12 17:28:24 -08:00
README.md Updates to source and doc build pages (#11464) 2021-07-20 18:07:34 -07:00
package-lock.json Docs: fix doc search (#13164) 2022-10-03 16:48:13 -07:00
package.json Docs: fix doc search (#13164) 2022-10-03 16:48:13 -07:00
pom.xml Prepare master branch for next release, 26.0.0 (#13401) 2022-11-22 15:31:01 +05:30
redirects.json Various documentation updates. (#13107) 2022-09-16 21:58:11 -07:00
sidebars.json doc: add a basic JDBC tutorial (#13343) 2022-11-30 16:25:35 -08:00
siteConfig.js Docs: fix doc search (#13164) 2022-10-03 16:48:13 -07:00

README.md

Druid doc builder

This website was created with Docusaurus.

To view documentation run:

npm install

Then run:

npm start

The current version of the web site appears in your browser. Edit pages with your favorite editor. Refresh the web page after each edit to review your changes.

Dependencies

  • NodeJS. Use the version Docusaurus specifies, not a newer one. (For example, if 12.x is requested, don't install 16.x.) Docusaurus may require a version newer than that available in your Linux package repository, but older than the latest version. See this page to find the version required by Docusaurus.
  • The Yarn dependency from Docusaurus is optional. (This Yarn is not the Hadoop resource manager, it is a package manager for Node.js).
  • Docusaurus. Installed automatically as part of the the above npm commands.

Variables

Documentation pages can refer to a number of special variables using the {{var}} syntax:

  • DRUIDVERSION - the version of Druid in which the page appears. Allows creating links to files of the same version on GitHub.

The variables are not replaced when running the web site locally using the start command above.

Spellcheck

Please run a spellcheck before issuing a pull request to avoid a build failure due to spelling issues. Run:

npm run link-lint
npm run spellcheck

If you introduce new (correctly spelled) project names or technical terms, add them to the dictionary in the .spelling file in this directory. Also, terms enclosed in backticks are not spell checked. Example: `symbolName`