124 lines
5.5 KiB
Markdown
124 lines
5.5 KiB
Markdown
# Configuring search
|
|
|
|
{! backend/administration/CLI_tasks/general_cli_task_info.include !}
|
|
|
|
## Built-in search
|
|
|
|
To use built-in search that has no external dependencies, set the search module to `Pleroma.Activity`:
|
|
|
|
> config :pleroma, Pleroma.Search, module: Pleroma.Search.DatabaseSearch
|
|
|
|
While it has no external dependencies, it has problems with performance and relevancy.
|
|
|
|
## Meilisearch
|
|
|
|
Note that it's quite a bit more memory hungry than PostgreSQL (around 4-5G for ~1.2 million
|
|
posts while idle and up to 7G while indexing initially). The disk usage for this additional index is also
|
|
around 4 gigabytes. Like [RUM](./cheatsheet.md#rum-indexing-for-full-text-search) indexes, it offers considerably
|
|
higher performance and ordering by timestamp in a reasonable amount of time.
|
|
Additionally, the search results seem to be more accurate.
|
|
|
|
Due to high memory usage, it may be best to set it up on a different machine, if running pleroma on a low-resource
|
|
computer, and use private key authentication to secure the remote search instance.
|
|
|
|
To use [meilisearch](https://www.meilisearch.com/), set the search module to `Pleroma.Search.Meilisearch`:
|
|
|
|
> config :pleroma, Pleroma.Search, module: Pleroma.Search.Meilisearch
|
|
|
|
You then need to set the address of the meilisearch instance, and optionally the private key for authentication. You might
|
|
also want to change the `initial_indexing_chunk_size` to be smaller if you're server is not very powerful, but not higher than `100_000`,
|
|
because meilisearch will refuse to process it if it's too big. However, in general you want this to be as big as possible, because meilisearch
|
|
indexes faster when it can process many posts in a single batch.
|
|
|
|
> config :pleroma, Pleroma.Search.Meilisearch,
|
|
> url: "http://127.0.0.1:7700/",
|
|
> private_key: "private key",
|
|
> initial_indexing_chunk_size: 100_000
|
|
|
|
Information about setting up meilisearch can be found in the
|
|
[official documentation](https://docs.meilisearch.com/learn/getting_started/installation.html).
|
|
You probably want to start it with `MEILI_NO_ANALYTICS=true` environment variable to disable analytics.
|
|
At least version 0.25.0 is required, but you are strongly adviced to use at least 0.26.0, as it introduces
|
|
the `--enable-auto-batching` option which drastically improves performance. Without this option, the search
|
|
is hardly usable on a somewhat big instance.
|
|
|
|
### Private key authentication (optional)
|
|
|
|
To set the private key, use the `MEILI_MASTER_KEY` environment variable when starting. After setting the _master key_,
|
|
you have to get the _private key_, which is actually used for authentication.
|
|
|
|
=== "OTP"
|
|
```sh
|
|
./bin/pleroma_ctl search.meilisearch show-keys <your master key here>
|
|
```
|
|
|
|
=== "From Source"
|
|
```sh
|
|
mix pleroma.search.meilisearch show-keys <your master key here>
|
|
```
|
|
|
|
You will see a "Default Admin API Key", this is the key you actually put into your configuration file.
|
|
|
|
### Initial indexing
|
|
|
|
After setting up the configuration, you'll want to index all of your already existsing posts. Only public posts are indexed. You'll only
|
|
have to do it one time, but it might take a while, depending on the amount of posts your instance has seen. This is also a fairly RAM
|
|
consuming process for `meilisearch`, and it will take a lot of RAM when running if you have a lot of posts (seems to be around 5G for ~1.2
|
|
million posts while idle and up to 7G while indexing initially, but your experience may be different).
|
|
|
|
The sequence of actions is as follows:
|
|
|
|
1. First, change the configuration to use `Pleroma.Search.Meilisearch` as the search backend
|
|
2. Restart your instance, at this point it can be used while the search indexing is running, though search won't return anything
|
|
3. Start the initial indexing process (as described below with `index`),
|
|
and wait until the task says it sent everything from the database to index
|
|
4. Wait until everything is actually indexed (by checking with `stats` as described below),
|
|
at this point you don't have to do anything, just wait a while.
|
|
|
|
To start the initial indexing, run the `index` command:
|
|
|
|
=== "OTP"
|
|
```sh
|
|
./bin/pleroma_ctl search.meilisearch index
|
|
```
|
|
|
|
=== "From Source"
|
|
```sh
|
|
mix pleroma.search.meilisearch index
|
|
```
|
|
|
|
This will show you the total amount of posts to index, and then show you the amount of posts indexed currently, until the numbers eventually
|
|
become the same. The posts are indexed in big batches and meilisearch will take some time to actually index them, even after you have
|
|
inserted all the posts into it. Depending on the amount of posts, this may be as long as several hours. To get information about the status
|
|
of indexing and how many posts have actually been indexed, use the `stats` command:
|
|
|
|
=== "OTP"
|
|
```sh
|
|
./bin/pleroma_ctl search.meilisearch stats
|
|
```
|
|
|
|
=== "From Source"
|
|
```sh
|
|
mix pleroma.search.meilisearch stats
|
|
```
|
|
|
|
### Clearing the index
|
|
|
|
In case you need to clear the index (for example, to re-index from scratch, if that needs to happen for some reason), you can
|
|
use the `clear` command:
|
|
|
|
=== "OTP"
|
|
```sh
|
|
./bin/pleroma_ctl search.meilisearch clear
|
|
```
|
|
|
|
=== "From Source"
|
|
```sh
|
|
mix pleroma.search.meilisearch clear
|
|
```
|
|
|
|
This will clear **all** the posts from the search index. Note, that deleted posts are also removed from index by the instance itself, so
|
|
there is no need to actually clear the whole index, unless you want **all** of it gone. That said, the index does not hold any information
|
|
that cannot be re-created from the database, it should also generally be a lot smaller than the size of your database. Still, the size
|
|
depends on the amount of text in posts.
|