Adrien Grand 98815655c1 Cache number of live documents with document-level security. (elastic/x-pack-elasticsearch#4255)
Currently numDocs() is computed lazily, but this doesn't help since
BaseCompositeReader calls numDocs() on its sub readers eagerly. This may cause
performance issues since every time we wrap a reader with DocumentSubSetReader
(which means for every query when DLS is enabled) we need to recompute the
number of live documents, which runs in linear time with the number of matches
of the role query.

Not computing numDocs() eagerly in DocumentSubSetReader might help, but it
would also be fragile since callers of this method still usually assume that
it runs in constant time. So I am proposing that we add a cache of the number
of live docs in order to decrease the performance hit of document-level
security. I would expect this cache to be efficient as it will not only reuse
entries in-between refreshes, but also across refreshes for segments that
haven't received any new updates.

Original commit: elastic/x-pack-elasticsearch@5a3af1b174
2018-04-12 09:12:16 +02:00
2017-03-19 16:37:21 -04:00
2018-01-31 23:18:58 -05:00
2018-04-12 07:50:05 +02:00
2015-10-30 11:16:29 -06:00
2018-01-04 16:42:12 -05:00
2018-01-04 16:42:12 -05:00
2018-04-20 14:16:58 -07:00

= Elasticsearch X-Pack

A set of Elastic's commercial plugins for Elasticsearch:

- License
- Security
- Watcher
- Monitoring
- Machine Learning
- Graph

= Setup

You must checkout `x-pack-elasticsearch` and `elasticsearch` with a specific directory structure. The
`elasticsearch` checkout will be used when building `x-pack-elasticsearch`. The structure is:

- /path/to/elastic/elasticsearch
- /path/to/elastic/elasticsearch-extra/x-pack-elasticsearch

== Vault Secret

The build requires a Vault Secret ID. You can use a GitHub token by following these steps:

1. Go to https://github.com/settings/tokens
2. Click *Generate new token*
3. Set permissions to `read:org`
4. Copy the token into `~/.elastic/github.token`
5. Set the token's file permissions to `600`

```
$ mkdir ~/.elastic
$ vi ~/.elastic/github.token
# Add your_token exactly as it is into the file and save it
$ chmod 600 ~/.elastic/github.token
```

If you do not create the token, then you will see something along the lines of this as the failure when trying to build X-Pack:

```
* What went wrong:
Missing ~/.elastic/github.token file or VAULT_SECRET_ID environment variable, needed to authenticate with vault for secrets
```

=== Offline Mode

When running the build in offline mode (`--offline`), it will not required to have the vault secret setup.

== Native Code

**This is mandatory as tests depend on it**

Machine Learning requires platform specific binaries, built from https://github.com/elastic/ml-cpp via CI servers.

= Build

- Run unit tests:
+
[source, txt]
-----
gradle clean test
-----

- Run all tests:
+
[source, txt]
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gradle clean check
-----

- Run integration tests:
+
[source, txt]
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gradle clean integTest
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- Package X-Pack (without running tests)
+
[source, txt]
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gradle clean assemble
-----

- Install X-Pack (without running tests)
+
[source, txt]
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gradle clean install
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= Building documentation

The source files in this repository can be included in either the X-Pack
Reference or the Elasticsearch Reference.

NOTE: In 5.4 and later, the Elasticsearch Reference includes X-Pack-specific
content that is pulled from this repo.

To build the Elasticsearch Reference on your local machine, use the `docbldes` 
or `docbldesx` build commands defined in
https://github.com/elastic/docs/blob/master/doc_build_aliases.sh

== Adding Images

When you include an image in the documentation, specify the path relative to the
location of the asciidoc file. By convention, we put images in an `images`
subdirectory.

For example to insert `watcher-ui-edit-watch.png` in `watcher/limitations.asciidoc`:

. Add an `images` subdirectory to the watcher directory if it doesn't already exist.
. In `limitations.asciidoc` specify:
+
[source, txt]
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 image::images/watcher-ui-edit-watch.png["Editing a watch"]
-----

Please note that image names and anchor IDs must be unique within the book, so
do not use generic identifiers.
Description
🔎 Open source distributed and RESTful search engine.
Readme 546 MiB
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