Indexes List View
All the database indexes are listed in this view.
Actions such as creating a new index, modifying an existing index, setting its desired state, and much more can be performed.
In this page:
Indexes List View
Figure-1: The indexes List View
1. Index name and type
Name - e.g. In the above example the index name is: 'NamesIndex'.
Type - This is the Index Type, which can be -
- Auto Map
- Auto Map-Reduce
- These are the collections that are defined in the Map part of the index-definition.
- Data from these collections is scanned and indexed.
- A simple
Map-index operates on a single collection while a
Multi-Map index is defined with more than one collection.
- In the above example - Index 'NamesIndex' is a Multi-Map index operating on 'Companies, Employees' collections.
3. Index State
4. Index Source
- Can be: Documents | Counters | TimeSeries
5. Index Status
Entries - The number of documents that are the result for a basic query on this index. (e.g. from index 'NamesIndex')
Status - Indicate if the index is up-to-date or if it is stale.
Indexes List View - Actions
Figure-2: Indexes List View - Actions
1. Crate a new index
Click to query the index.
Click to view the index's terms that were actually indexed.
Click to edit/view the index definition.
- Static-index: View and edit the index definition.
- Auto-Index: View only.
- Reset Index
Click to reset the index. All documents matched by the index definition will be re-indexed.
Click to delete the index.
Disable index or set as Paused. See states explanation above (under the figure-1).
Set the indexing-process thread priority as RavenDB prioritizes requests-processing over Indexing by default.
Set modifications behavior:
- Unlocked - Changes to the index definitions will be applied. See Side by Side Indexing
- Locked - Index definitions changes will not be applied! No Error will be raised.
- Locked(Error) - Index definitions changes will not be applied! An error is raised upon trying to modify.
4. Selected Indexes Options
Can apply the following for selected/checked indexes from the list:
- Set indexes state (disable/pause)
- Set lock mode
5. Pause Indexing until Restart
- Setting this will pause all indexing in the database.
- Indexing will resume only when selecting this button again (Resume Indexing) or upon a server restart.
Indexes List View - Errors
Figure-3: Indexes List View - Errors
1. Errored Index
An indexing error can occur when the indexing-function is malformed or when the document data is corrupted/missing.
Once the index errors rate exceeds a certain rate, the index state will be marked with 'Error' and queries can't be made to it.
Resetting the index will re-index all documents matching its definition and clear the previous errors.
In the above example, Index 'Cities/Details' state is 'Error' as 500 errors were encountered.
See more in Degugging Index Errors
2. Faulty Index
When an index is already defined but the server fails to open its index data file from disk, or if this file is corrupted,
then the server will mark the index as Faulty, indicating that something is wrong with this index data files.
If the issue with the index's data file is resolved, you can click 'Open Index' (label '3' in above figure),
so that the index is processed again.
A possible solution is to reset the index - restart the indexing process from scratch,
so that new data files for the index are created, replacing the corrupted ones.
Note: The detailed errors list can be found in the Index Errors view.
Indexes List View - Side by Side Indexing
Figure-4: Indexes List View - Side by Side Indexing
All index updates in RavenDB are done using the side-by-side strategy.
When an index-definition is modified, RavenDB creates a 'new index' with the new definition.
This index will start processing all relevant documents.
The 'old index' (label '1' in above figure) will answer queries and index new documents until
the 'new index' (label '2' in above figure) is caught up and has indexed everything.
Once the 'new index' has completed its work, it will automatically replace the old one.
You can also force an immediate replacement if needed, by clicking 'Swap Now' (label '3' in above figure).
The 'old index' definition can still be referenced as RavenDB keeps
history of index revisions,
allowing you to revert an index to any of its past revisions.
Indexes List View - Rolling Deployment
Figure-5: Indexes List View - Rolling Deployment
1. Rolling Deployment
- When an index that is defined
with Rolling Deployment is created or modified, the
indexing process progress is displayed per node.
2. Force Parallel
- Click to force parallel indexing deployment for the current node.
- The other nodes will continue deployment with the rolling mode.
3. Indexing in Progress
A is currently running the 'TradeVolumeByMonth' index.
- The indexing progress and the estimated time left are displayed.
- Read here about the rolling procedure.
4. Indexing Done
C are waiting for their turn to run the 'TradeVolumeByMonth' index.
- Read here about the order of deployment.