> ## Documentation Index
> Fetch the complete documentation index at: https://v2.spacedrive.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Locations

Locations are directories that Spacedrive tracks and monitors. When you add a location, Spacedrive indexes its contents and watches for changes in real-time.

## What is a Location?

A location is any folder on your device that you want Spacedrive to index. Once added:

* Files are indexed immediately
* Changes are detected in real-time
* Metadata syncs across your devices (if enabled)
* Content gets unique identifiers for deduplication

## Location Architecture

Locations have a sophisticated relationship with the file index:

### Root Entry

When you add a location, Spacedrive creates a **root entry** in the entries table for the location directory itself. This root entry:

* Has no parent (`parent_id = NULL`)
* Gets a self-reference in the `entry_closure` table
* Serves as the ancestor for all files/folders within the location
* Is stored in the `directory_paths` table with its full filesystem path

```rust theme={null}
// Location points to root entry
Location {
    entry_id: Some(123),  // References entries table
    // ... other fields
}

// Root entry for "/Users/alice/Documents"
Entry {
    id: 123,
    name: "Documents",
    kind: Directory,
    parent_id: None,  // Root has no parent
    // ... other fields
}
```

### Why Root Entries?

This design enables **nested locations without duplicating the file tree**. If you have:

1. Location A: `/Users/alice/Documents` (entry\_id: 123)
2. Location B: `/Users/alice/Documents/Work` (entry\_id: 124)

The entries table contains a single unified tree:

```
Entry(123): "Documents"           parent_id: NULL
  ├─ Entry(124): "Work"            parent_id: 123  ← Location B points here
  │   └─ Entry(125): "report.pdf"  parent_id: 124
  └─ Entry(126): "Photos"          parent_id: 123
      └─ Entry(127): "sunset.jpg"  parent_id: 126
```

**Benefits:**

* **No duplication** - `Work/report.pdf` exists once in the database, accessible from both locations
* **Consistent hierarchy** - Parent-child relationships are preserved regardless of location boundaries
* **Efficient storage** - Adding nested locations doesn't create redundant entry records
* **Flexible organization** - Users can create fine-grained locations within broader ones
* **Different index modes** - Apply Deep indexing to `/Photos` but Shallow to `/Photos/RAW` without duplicating entries

Without this design, overlapping locations would require duplicating all entries, leading to sync conflicts and wasted storage.

### Entry Hierarchy

All files and folders within a location form a tree structure:

```
Location (entry_id: 123)
  └─ Entry(123): "Documents"           parent_id: NULL
      ├─ Entry(124): "Work"            parent_id: 123
      │   └─ Entry(125): "report.pdf"  parent_id: 124
      └─ Entry(126): "Photos"          parent_id: 123
          └─ Entry(127): "sunset.jpg"  parent_id: 126
```

The `entry_closure` table enables efficient queries:

* "Find all files in this location" → Query where `ancestor_id = 123`
* "Get file path" → Walk up closure table following parent relationships
* "Calculate total size" → Aggregate from all descendants

### Directory Paths Table

Directory paths are stored separately for performance:

```sql theme={null}
-- directory_paths table
entry_id | path
---------|---------------------------
123      | /Users/alice/Documents
124      | /Users/alice/Documents/Work
126      | /Users/alice/Documents/Photos
```

This avoids storing redundant path information on every file entry and makes path-based lookups significantly faster. Only directories are stored in this table, not individual files.

### Device Ownership & Sync

Entries don't have a `device_id` field. Instead, **ownership is inherited from the location**:

```rust theme={null}
// Location owns all its entries
Location {
    device_id: 42,    // Device that owns this location
    entry_id: 123,    // Root of the entry tree
}

// Entries don't store device_id
Entry {
    id: 124,
    parent_id: 123,   // Part of location's tree
    // NO device_id field
}
```

**Why this matters for sync:**

1. **Efficient ownership queries** - Find all entries owned by a device via `entry_closure`:
   ```sql theme={null}
   SELECT e.* FROM entries e
   INNER JOIN entry_closure ec ON e.id = ec.descendant_id
   WHERE ec.ancestor_id IN (
       SELECT entry_id FROM locations WHERE device_id = ?
   );
   ```

2. **No redundant storage** - Avoids storing device\_id on millions of entry records

3. **Instant ownership transfer** - When you move an external drive between devices, just update the location's `device_id`. All millions of files instantly change ownership without touching the entries table. See [Library Sync - Portable Volumes](/docs/core/library-sync#portable-volumes--ownership-changes) for details.

**Sync implications:**

* Only the owning device can modify entries in a location
* Other devices have read-only views of remote locations
* Location ownership change is a single-row update (not a bulk migration)

### Core Properties

```rust theme={null}
pub struct Location {
    pub id: i32,                     // Database primary key
    pub uuid: Uuid,                  // Unique identifier
    pub device_id: i32,              // Device that owns this location
    pub entry_id: Option<i32>,       // Root entry for this location's tree
    pub name: Option<String>,        // Display name
    pub index_mode: String,          // "shallow" | "content" | "deep"
    pub scan_state: String,          // "pending" | "scanning" | "completed" | "error"
    pub last_scan_at: Option<DateTime<Utc>>,
    pub error_message: Option<String>,
    pub total_file_count: i64,
    pub total_byte_size: i64,
    pub job_policies: Option<String>, // JSON-serialized policies
    pub created_at: DateTime<Utc>,
    pub updated_at: DateTime<Utc>,
}
```

<Note>
  See [Data Model - Location](/docs/core/data-model#location) for the complete database schema.
</Note>

### Index Modes

Choose how deeply Spacedrive analyzes your files:

* **Shallow**: Basic metadata only (name, size, dates)
* **Content**: Includes content hashing for deduplication
* **Deep**: Full media processing with thumbnails and metadata

### Scan States

Locations track their scanning status:

```rust theme={null}
pub enum ScanState {
    Idle,                    // Not scanning
    Scanning { progress: u8 }, // Currently scanning (0-100%)
    Completed,               // Scan finished successfully
    Failed,                  // Scan encountered errors
    Paused,                  // Scan was paused
}
```

## Adding Locations

### Using the CLI

```bash theme={null}
# Add a location
spacedrive location add ~/Documents --name "Documents"

# Add with deep indexing
spacedrive location add ~/Photos --name "Photos" --mode deep

# List all locations
spacedrive location list
```

### Using the API

```rust theme={null}
let (location_id, job_id) = location_manager
    .add_location(
        library,
        PathBuf::from("/Users/alice/Desktop"),
        Some("Desktop".to_string()),
        device_id,
        IndexMode::Content,
    )
    .await?;
```

### What Happens When You Add a Location

The location creation process is atomic (uses database transactions):

1. **Path validation** - Ensures the directory exists and is accessible
2. **Create root entry** - Creates an entry for the location directory
   * Assigns a UUID for sync compatibility
   * Sets `parent_id = NULL` (this is a root)
   * Sets `indexed_at` to enable sync emission
3. **Create closure record** - Adds self-reference to `entry_closure` table
4. **Create directory path** - Adds full path to `directory_paths` table
5. **Duplicate check** - Verifies no location already exists for this entry
6. **Create location record** - Stores location metadata
   * Links to root entry via `entry_id`
   * Sets initial `scan_state = "pending"`
7. **Commit transaction** - All or nothing (prevents partial state)
8. **Emit sync event** - Broadcasts root entry StateChange for sync
9. **Start indexing job** - Begins scanning child files/folders
10. **Watcher setup** - Begins monitoring changes
11. **Event broadcast** - Notifies other services

If any step fails, the entire transaction rolls back.

## File System Watching

The watcher service provides real-time monitoring across all platforms.

### Platform Support

**macOS**: Uses FSEvents for efficient volume-level monitoring
**Linux**: Uses inotify for precise file-level events
**Windows**: Uses ReadDirectoryChangesW for real-time updates

### Event Types

The watcher detects these file system changes:

```rust theme={null}
pub enum WatcherEvent {
    Create,     // New file or directory
    Modify,     // Content or metadata changed
    Remove,     // File or directory deleted
    Rename {    // Move or rename operation
        from: PathBuf,
        to: PathBuf,
    },
}
```

### Automatic Filtering

The watcher respects the **indexer rules** configured for each location. These rules determine which files and directories are tracked:

**Available Indexer Rules:**

* `no_system_files` - Ignores `.DS_Store`, `Thumbs.db`, and other OS-generated files
* `no_hidden` - Ignores hidden files (dotfiles) except important ones like `.gitignore`
* `no_git` - Ignores `.git` directories
* `gitignore` - Respects `.gitignore` patterns in the directory tree
* `only_images` - Only processes image files
* `no_dev_dirs` - Ignores `node_modules/`, `target/`, `.cache/`, and other build directories

**Default Configuration:**

```rust theme={null}
RuleToggles {
    no_system_files: true,   // Skip OS junk
    no_hidden: false,        // Include dotfiles
    no_git: true,            // Skip .git
    gitignore: true,         // Respect .gitignore
    only_images: false,      // Index all file types
    no_dev_dirs: true,       // Skip build artifacts
}
```

<Note type="warning">
  Currently, the watcher uses hardcoded filtering instead of per-location indexer rules. Integration with the indexer rules engine is planned, which will allow each location to have custom filtering rules configured through the UI.
</Note>

When indexer rules integration is complete, the watcher will automatically filter events based on each location's configured rules, ensuring consistency between initial indexing and real-time change detection.

## Configuration

### Watcher Settings

Configure the watcher for your needs:

```rust theme={null}
LocationWatcherConfig {
    debounce_duration: Duration::from_millis(100),  // Event consolidation
    event_buffer_size: 1000,                        // Queue size
    debug_mode: false,                              // Detailed logging
}
```

### Performance Tuning

**For large directories** (>100k files):

* Increase buffer size to prevent event loss
* Use longer debounce periods
* Consider excluding cache directories

**For network drives**:

* Enable polling fallback
* Increase debounce duration
* Monitor connection stability

**For SSDs vs HDDs**:

* SSDs: Shorter debounce, larger buffers
* HDDs: Longer debounce for mechanical latency

## Watching Events

Subscribe to location events in your code:

```rust theme={null}
let mut events = event_bus.subscribe();

while let Ok(event) = events.recv().await {
    match event {
        Event::EntryCreated { path, .. } => {
            println!("New file: {}", path);
        }
        Event::EntryModified { path, .. } => {
            println!("File changed: {}", path);
        }
        _ => {}
    }
}
```

### Event Flow

When a file changes:

1. Operating system detects change
2. Watcher receives raw event
3. Event is filtered and debounced
4. Structured event is created
5. Event bus broadcasts to subscribers
6. Services react (indexer, sync, UI)

## Managing Locations

### Pause Watching

Temporarily stop monitoring without removing:

```bash theme={null}
spacedrive location pause <location-id>
```

### Update Settings

Change location configuration:

```bash theme={null}
# Disable watching
spacedrive location update <location-id> --watch false

# Change index mode
spacedrive location update <location-id> --mode shallow
```

### Remove Location

Stop tracking a directory:

```bash theme={null}
spacedrive location remove <location-id>
```

<Warning>
  Removing a location doesn't delete files. It only stops Spacedrive from
  tracking them.
</Warning>

## Troubleshooting

### High CPU Usage

If watching causes high CPU:

1. Check for directories with rapid changes
2. Increase debounce duration
3. Exclude problematic subdirectories
4. Temporarily disable watching

```bash theme={null}
# Find active locations
spacedrive location list --verbose

# Disable problematic location
spacedrive location update <id> --watch false
```

### Missing Changes

If file changes aren't detected:

1. Verify location has watching enabled
2. Check file system permissions
3. Ensure platform limits aren't exceeded
4. Try restarting the watcher

### Duplicate Events

If you see the same change multiple times:

1. Increase debounce duration
2. Check for symlink loops
3. Verify you're not watching overlapping paths

### Debug Mode

Enable detailed logging:

```bash theme={null}
# Set debug mode
export SPACEDRIVE_WATCHER_DEBUG=1

# Run with verbose logging
spacedrive --log-level debug
```

## Platform Limits

### macOS

* FSEvents may coalesce rapid changes
* Volume-level monitoring affects all locations on a drive

### Linux

* inotify has a watch descriptor limit (usually 8192)
* Increase with: `echo 524288 | sudo tee /proc/sys/fs/inotify/max_user_watches`

### Windows

* Long paths require special handling
* Network drives may fall back to polling

## Best Practices

### Location Organization

1. **Nested locations are supported** - You can add both `/Documents` and `/Documents/Work` as separate locations
   * The file tree is shared, not duplicated
   * Each location provides a different "view" into the same hierarchy
   * Useful for applying different index modes or policies to subdirectories
2. **Group related content** - One location per project or media type
3. **Consider performance** - Separate frequently-changing directories

### Exclusion Patterns

Create `.spacedriveignore` files to exclude:

```
# Build artifacts
node_modules/
target/
dist/

# Cache directories
.cache/
*.tmp

# Large generated files
*.log
*.dump
```

### Network Locations

For network-attached storage:

1. Use Content index mode (avoid Deep)
2. Increase debounce to 500ms+
3. Monitor connection stability
4. Consider scheduled indexing instead

## Integration

### Services Using Location Events

* **Indexer**: Re-analyzes modified files
* **Search**: Updates search index
* **Sync**: Propagates changes to other devices
* **Thumbnails**: Regenerates previews
* **Frontend**: Updates UI in real-time

### Event Priority

Critical events are processed first:

1. User-initiated changes
2. Create/delete operations
3. Modifications
4. Metadata updates

## Implementation Details

### Database Schema

Locations utilize three main tables:

**locations** - Location metadata

```sql theme={null}
CREATE TABLE locations (
    id INTEGER PRIMARY KEY,
    uuid BLOB NOT NULL UNIQUE,
    device_id INTEGER NOT NULL,
    entry_id INTEGER,  -- References entries(id)
    name TEXT,
    index_mode TEXT NOT NULL,
    scan_state TEXT NOT NULL,
    -- ... other fields
    FOREIGN KEY (device_id) REFERENCES devices(id),
    FOREIGN KEY (entry_id) REFERENCES entries(id)
);
```

**entries** - All files and directories (see [Data Model](/docs/core/data-model#entry))

**entry\_closure** - Transitive closure table for hierarchy (see [Data Model](/docs/core/data-model#hierarchical-queries))

**directory\_paths** - Directory path cache

```sql theme={null}
CREATE TABLE directory_paths (
    entry_id INTEGER PRIMARY KEY,  -- References entries(id)
    path TEXT NOT NULL,
    FOREIGN KEY (entry_id) REFERENCES entries(id)
);
```

### Query Patterns

**Find all entries in a location:**

```sql theme={null}
SELECT e.* FROM entries e
INNER JOIN entry_closure ec ON e.id = ec.descendant_id
WHERE ec.ancestor_id = (
    SELECT entry_id FROM locations WHERE uuid = ?
);
```

**Get full path for a directory:**

```sql theme={null}
SELECT path FROM directory_paths
WHERE entry_id = ?;
```

**Get full path for a file:**

```sql theme={null}
-- Walk up parent chain and concatenate with directory path
SELECT dp.path || '/' || e.name as full_path
FROM entries e
LEFT JOIN entries parent ON e.parent_id = parent.id
LEFT JOIN directory_paths dp ON parent.id = dp.entry_id
WHERE e.id = ?;
```

## Related Documentation

* [Data Model](/docs/core/data-model) - Complete database schema
* [Indexing](/docs/core/indexing) - How files are analyzed
* [Sync](/docs/core/sync) - Cross-device synchronization
* [Events](/docs/core/events) - Event system architecture