[DOCS] Information on minimum requirements for building (open-edge-platform#630)

* [DOCS] Add information on Minimum Hardware Requirements

* Update docs/developer-guide/emt-system-requirements.md

Author: sgolebiewski-intel

docs/developer-guide/emt-system-requirements.md

@@ -35,7 +35,6 @@ and workloads. It has been validated on the following platforms:
 | Intel® Arc™ B580      | NVIDIA® Tesla® P100           |
 |                       | GeForce RTX™ 3090             |
 
-
 ## Recommended Hardware Configuration
 
 ### Edge Microvisor Toolkit Developer Node
@@ -54,11 +53,16 @@ and workloads. It has been validated on the following platforms:
 | Storage (SSD/NVMe or eMMC) | 64 GB           | 512 GB            | 1 TB            |
 | Networking (Ethernet)      | 1 GbE or higher | 1 GbE or higher   | 1 GbE or higher |
 
-
 ## Software Requirements
 
 | Component        | Edge Microvisor Toolkit Developer Node | Edge Microvisor Toolkit (Edge Manageability Framework or Standalone Node) |
 |------------------|-------------------------|-------------------------|
 | Kernel Version   | Intel® Kernel 6.12      | Intel® Kernel 6.12      |
 | Bootloader       | GRUB                    | Systemd-boot            |
 | Update Mechanism | RPM-based with TDNF     | Image-based A/B updates |
+
+## Minimum Hardware Configuration for Building OS Image
+
+| CPU | RAM | Storage |
+|---|---|---|
+| 13th, 14th Generation Intel® Core™ (Raptor Lake), <br> 4 cores | 32 GB <br> (25 GB free) | 250 GB (200 GB free) |

docs/developer-guide/get-started/emt-build-and-deploy.md

@@ -18,6 +18,11 @@ meet specific edge deployment needs. You can choose between:
 3. [Install the toolkit on an edge device.](#3-install-the-toolkit-on-an-edge-device)
 4. [Deploy AI solution.](#4-deploy-ai-solution)
 
+
+## Requirements
+
+Make sure your machine meets the [minimum hardware configuration](../emt-system-requirements.md#minimum-hardware-configuration-for-building-os-image).
+
 ## 1. Build the microvisor
 
 If you want to create your own custom standalone node, follow the instructions below to build
@@ -109,7 +114,11 @@ For example, to build a RAW image without real-time extensions, use `edge-image.
 > release, make sure to build it **without** the `REBUILD_PACKAGES=n` option to
 > perform a full local rebuild.
 >
-> Keep in mind, that it will take time (~18 hours on a machine with a 20+ core CPU).
+> Keep in mind, that it will take time
+>
+> - ~18 hours on a machine with a 20+ core CPU,
+> - ~24-36 hours on a machine meeting the
+>   [minimum hardware requirements](../emt-system-requirements.md#minimum-hardware-configuration-for-building-os-image).
 
 1. Clone the release branch of edge-microvisor-toolkit repository:
 
@@ -175,6 +184,13 @@ For example, to build a RAW image without real-time extensions, use `edge-image.
 
 7. Rebuild RPM packages.
 
+   **Important**: On a machine with limited resources, meeting
+   [minimum hardware configuration](../emt-system-requirements.md#minimum-hardware-configuration-for-building-os-image),
+   make sure to add `-j2  CONCURRENT_PACKAGE_BUILDS=4` parameters to avoid crashes.
+   You can increase them to `-j4 CONCURRENT_PACKAGE_BUILDS=6`
+   or even not include them at all when rebuilding the packages on a machine
+   that greatly exceeds the minimum requirements.
+
    ```bash
    # Rebuild packages/RPMs local toolchain
    sudo make build-packages REBUILD_TOOLS=y VALIDATE_TOOLCHAIN_GPG=n

docs/developer-guide/get-started/emt-building-howto.md

@@ -44,7 +44,7 @@ git clone https://github.com/open-edge-platform/edge-microvisor-toolkit --branch
 
    > **Note:**
    >
-   > - Building the **entire toolchain** may take a lot of time. Adding the
+   > - Building the **entire toolchain** may take time. Adding the
    >   `REBUILD_TOOLCHAIN=y` parameter to the `make` command rebuilds
    >   the entire toolchain.
    > - It is recommended to start from a clean build directory and remove
@@ -71,6 +71,13 @@ git clone https://github.com/open-edge-platform/edge-microvisor-toolkit --branch
 
 3. Rebuild RPM packages.
 
+   **Important**: On a machine with limited resources, meeting
+   [minimum hardware configuration](../emt-system-requirements.md#minimum-hardware-configuration-for-building-os-image),
+   make sure to add `-j2  CONCURRENT_PACKAGE_BUILDS=4` parameters to avoid crashes.
+   You can increase them to `-j4 CONCURRENT_PACKAGE_BUILDS=6`
+   or even not include them at all when rebuilding the packages on a machine
+   that greatly exceeds the minimum requirements.
+
    ```bash
    # Rebuild packages/RPMs
    sudo make build-packages REBUILD_TOOLS=y VALIDATE_TOOLCHAIN_GPG=n
@@ -104,13 +111,20 @@ You can find more information about specific parameters in the [build variables]
 
 **IMPORTANT**: To create an image from an older tag, for example the
 [3.0.20250718](https://github.com/open-edge-platform/edge-microvisor-toolkit/releases/tag/3.0.20250718)
-release tag, make sure to build it **without** the `REBUILD_PACKAGES=n` option.
+release tag, make sure to build it **without** the `REBUILD_PACKAGES=n` option
+to perform a full rebuild.
 Otherwise, the build process will download the latest available RPMs,
 which do not match those included in the older tag. It will cause a mismatch
 between versions of installed RPMS in the image and the available SPECs in
 Edge Microvisor Toolkit code.
 
-To build an ISO image, run the following command:
+> **Note**: Keep in mind that performing a full rebuild will take time:
+>
+> - ~18 hours on a machine with a 20+ core CPU,
+> - ~24-36 hours on a machine meeting the
+>   [minimum hardware requirements](../emt-system-requirements.md#minimum-hardware-configuration-for-building-os-image).
+
+To build an ISO image, you can run the following command:
 
 ```bash
 sudo make iso -j8 REBUILD_TOOLS=y CONFIG_FILE=./imageconfigs/full.json
@@ -129,10 +143,6 @@ To build a RAW image with real-time extensions, use the following command:
 sudo make image -j8 REBUILD_TOOLS=y CONFIG_FILE=./imageconfigs/edge-image-rt.json
 ```
 
-Keep in mind, that building without `REBUILD_PACKAGES=n` will perform a full
-rebuild based on the tag and take time (~18 hours on a machine with
-a 20+ core CPU).
-
 ## Customize Your Edge Microvisor Toolkit Image
 
 To add packages to the default image, you can define your own `packagelist.json` file, pointing to RPMs that should be included in the image.