Update meg docs

pages/meg/99-support/migration-to-merlin7.md

@@ -111,18 +111,21 @@ This script is primarily a **wrapper** around `fpsync`, providing additional log
 
 ```bash
 [root@meg-s-001 ~]# experiment_migration.bash --help
-Usage: ./experiment_migration.bash [options] -p <project_name>
+Usage: /usr/local/bin/experiment_migration.bash [options] -p <project_name>
 
 Options:
   -t | --threads N                   Number of parallel threads (default: 10). Recommended 12 as max.
-  -b | --experiment-src-basedir DIR  Experiment base directory (default: /data/experiment/meg)
-  -B | --experiment-dst-basedir DIR  Experiment base directory (default: /data/experiment/meg)
+  -b | --experiment-src-basedir DIR  Experiment base directory (default: /meg)
   -S | --space-source SPACE          Source project space name (default: data1)
+  -B | --experiment-dst-basedir DIR  Experiment base directory (default: /data/project/meg)
   -D | --space-destination SPACE     Destination project space name (default: data1)
   -p | --project-name PRJ_NAME       Mantadory field. MeG project name. Examples:
                                      - 'online'
                                      - 'offline'
-                                     - 'shared'
+                                     - 'shared
+  -F | --force-destination-mkdir     Create the destination parent directory (default: false)
+                                     Example: mkdir -p $(dirname /data/project/meg/data1/PROJECT_NAME)
+                                     Result:  mkdir -p /data/project/meg/data1
   -s | --split N                     Number of files per split (default: 20000)
   -f | --filesize SIZE               File size threshold (default: 100G)
   -r | --runid ID                    Reuse an existing runid session
@@ -154,14 +157,14 @@ However, migrating full directories is generally <b>simpler</b> and <b>less erro
 {{site.data.alerts.end}}
 
 ```bash
-[root@meg-s-001 bin]# experiment_migration.bash -b /meg -B /data/project/meg -S data1 -D data1 -p "online"
+[root@meg-s-001 ~]# experiment_migration.bash -S data1 -D data1 -p "online"
 🔄 Transferring project:
    From: /meg/data1/online
-   To:   login002.merlin7.psi.ch:/data/project/meg/data1/online
+   To:   login001.merlin7.psi.ch:/data/project/meg/data1/online
    Threads: 10 | Split: 20000 files | Max size: 100G
    RunID: 
 
-Please confirm to start (y/N): N
+Please confirm to start (y/N): 
 ❌ Transfer cancelled by user.
 ```
 
@@ -174,7 +177,7 @@ The following example demonstrates how to migrate **only a subdirectory**.
 - For example, avoid running migrations with `-p "shared"` while simultaneously migrating `-p "shared/subprojects"`.
 
 ```bash
-[root@meg-s-001 bin]# experiment_migration.bash -b /meg -B /data/project/meg -S data1 -D data1 -p "shared/subprojects/meg1"
+[root@meg-s-001 ~]#  experiment_migration.bash -p "shared/subprojects/meg1" -F
 🔄 Transferring project:
    From: /meg/data1/shared/subprojects/meg1
    To:   login002.merlin7.psi.ch:/data/project/meg/data1/shared/subprojects/meg1
@@ -182,6 +185,15 @@ The following example demonstrates how to migrate **only a subdirectory**.
    RunID: 
 
 Please confirm to start (y/N): N
+❌ Transfer cancelled by user.
 ```
 
-This command initiates the migration of the directory: `/meg/data1/shared/subprojects/meg1` →  `login002.merlin7.psi.ch:/data/project/meg/data1/shared/subprojects/meg1`
+This command initiates the migration of the directory, by creating the destination parant directory (`-F` option): 
+* Creates the destination directory as follows:
+
+  ```bash
+  ssh login002.merlin.psi.ch mkdir -p /data/project/meg/data1/shared/subprojects
+  ```
+* Runs FPSYNC with 10 threads and N parts of max 20000 files or 100G files:
+  * Source: `/meg/data1/shared/subprojects/meg1` 
+  * Destination: `login002.merlin7.psi.ch:/data/project/meg/data1/shared/subprojects/meg1`