kbastani opened a new pull request #8024:
URL: https://github.com/apache/pinot/pull/8024
## Description
Created a new Pinot quickstart command called `EmptyQuickstart`.
The entire point of this command is that we previously had no quickstart
that would save your data after a restart. This will be used to update the
Homebrew formula so that users can run Pinot as a single component local
service that will save your data/tables/schemas/segments after a restart. It
can also be used for Docker when specifying a host volume data directory.
See the Documentation section below for usage notes.
## Upgrade Notes
Does this PR prevent a zero down-time upgrade? (Assume upgrade order:
Controller, Broker, Server, Minion)
* [ ] Yes (Please label as **<code>backward-incompat</code>**, and complete
the section below on Release Notes)
Does this PR fix a zero-downtime upgrade introduced earlier?
* [ ] Yes (Please label this as **<code>backward-incompat</code>**, and
complete the section below on Release Notes)
Does this PR otherwise need attention when creating release notes? Things to
consider:
- New configuration options
- Deprecation of configurations
- Signature changes to public methods/interfaces
- New plugins added or old plugins removed
* [ ] Yes (Please label this PR as **<code>release-notes</code>** and
complete the section on Release Notes)
## Documentation
To launch a single component installation of Pinot that saves data after a
restart, you can use the `EmptyQuickstart` command.
- Allows a user to use an external or embedded Zookeeper instance
(`-zkAddress`).
-- If no argument is provided, an embedded Zookeeper instance will be
launched.
-- When an argument is provided, no embedded Zookeeper instance will be
launched and controller/broker/server will use the provided ZK URL.
- Allows a user to specify a non-temporary data directory (`-dataDir`).
-- If no argument is provided, a temporary data directory will be generated.
-- When an argument is provided, embedded Zookeeper files are stored and
reused on restart.
-- When an argument is provided, Pinot controller/broker/server data files
are stored and reused on restart.
To start the quickstart command, run the following in your terminal.
```
# Reuses the provided dataDir on restart but launches an embedded ZK instance
$ bin/pinot-admin.sh QuickStart -type EMPTY -dataDir
"/usr/local/var/lib/pinot/data"
# Reuses the provided dataDir on restart and uses an external ZK instance
$ bin/pinot-admin.sh QuickStart -type EMPTY -dataDir
"/usr/local/var/lib/pinot/data" -zkAddress "localhost:2181"
```
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