chore: update docs

hanxiao · hanxiao · commit fbde0622d140 · 2022-03-07T19:28:20.000+01:00
diff --git a/docs/advanced/document-store/annlite.md b/docs/advanced/document-store/annlite.md
@@ -2,6 +2,10 @@
 
 One can use [Annlite](https://github.com/jina-ai/annlite) as the document store for DocumentArray. It is useful when one wants to have faster Document retrieval on embeddings, i.e. `.match()`, `.find()`.
 
+````{tip}
+This feature requires `annlite`. You can install it via `pip install "docarray[full]".` 
+````
+
 
 ## Usage
 
diff --git a/docs/advanced/document-store/index.md b/docs/advanced/document-store/index.md
@@ -1,3 +1,4 @@
+(doc-store)=
 # Document Store
 
 ```{toctree}
diff --git a/docs/advanced/document-store/qdrant.md b/docs/advanced/document-store/qdrant.md
@@ -2,6 +2,9 @@
 
 One can use [Qdrant](https://qdrant.tech) as the document store for DocumentArray. It is useful when one wants to have faster Document retrieval on embeddings, i.e. `.match()`, `.find()`.
 
+````{tip}
+This feature requires `qdrant-client`. You can install it via `pip install "docarray[full]".` 
+````
 
 ## Usage
 
diff --git a/docs/advanced/document-store/weaviate.md b/docs/advanced/document-store/weaviate.md
@@ -2,6 +2,9 @@
 
 One can use [Weaviate](https://www.semi.technology) as the document store for DocumentArray. It is useful when one wants to have faster Document retrieval on embeddings, i.e. `.match()`, `.find()`.
 
+````{tip}
+This feature requires `weaviate-client`. You can install it via `pip install "docarray[full]".` 
+````
 
 ## Usage
 
diff --git a/docs/fundamentals/documentarray/index.md b/docs/fundamentals/documentarray/index.md
@@ -22,6 +22,8 @@ It is also powerful as Numpy `ndarray` and Pandas `DataFrame`, allowing you to e
 
 What makes it more exciting is those advanced features of DocumentArray. These features greatly accelerate data scientists work on accessing nested elements, evaluating, visualizing, parallel computing, serializing, matching etc. 
 
+Finally, if your data is too big to fit into memory, you can simply switch to an {ref}`on-disk/remote document store<doc-store>`. All API and user experiences remain the same. No need to learn anything else.
+
 ## What's next?
 
 Let's see how to construct a DocumentArray {ref}`in the next section<construct-array>`.

Original file line number	Diff line number	Diff line change
`@@ -1,3 +1,4 @@`
	`1`	`+(doc-store)=`
`1`	`2`	`# Document Store`
`2`	`3`
`3`	`4`	```{toctree}