For any library storing MARC Bibliographic records in Source Record Storage (SRS), FOLIO contains a default MARC-to-Instance map. FOLIO uses that map when creating or updating Inventory Instances with Source = MARC. The map identifies the Instance fields that are controlled by the underlying MARC Bibliographic record, and which fields and subfields of MARC data populate into which Instance fields. Occasionally libraries may adjust their default map, either because of 1) updated default mappings delivered in a new FOLIO release or 2) local fields or mapping decisions that differ from the default map. When a library's default map is updated, those updated mappings will affect any Instances created or updated after the map change. However, some libraries would like to update all of their existing Instances to reflect the updated mappings. This script allows for that to happen. 

Based on testing in Lotus environment, refreshing Inventory Instances takes approximately 1/2 to 1 second per record, depending on the amount of other load on the tenant. Thus, for 1 million Instances, the time to refresh 1 million Instances would be approximately 6-12 days. Developers will continue to review to see if the timing can be decreased.

NOTE

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!!! This Instance update script may affect performance of other imports, so it needs to be used during non-working hours or during off-peak hours!!!

NOTE!!! This script will only work for Kiwi and later releases.

Before launching Script, you need to download jq library to allow script work:

https://stedolan.github.io/jq/download/

In order to run the script, you need:

1. Open terminal (Mac OS or UNIX Systems) or Power shell (Windows) 
2. Go to the folder where the script is located.
3. Run Script with or without parameters:
   
   • e.g. for launch without parameters - sh UpdateMarcToInstanceMapping.sh
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   • e.g. for launch with parameters - sh UpdateMarcToInstanceMapping.sh url tenant username password limit release
     Where:
     • url (your library okapi url) - can be seen in the app settings → software versions → okapi services → okapi
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     • tenant (admin tenant)
     • username (admin user name)
     • password (admin user name password)
     • limit (number of instances to parse where all sources are counted - FOLIO/MARC)
     • release (release version: 0 is for Kiwi, 1 is for Lotus and future releases)

After the script completes its work, it shows how long the script has been running and number of processed instances:

Total count: 1, Total succeeded count: 1, Total error count: 0
0 hours, 0 minutes and 4 seconds elapsed.

Also, as a result you will get 2 files: offset.txt and results.txt

offset file only will contain OFFSET value (the position in the dataset to start from, where all sources are counted - FOLIO/MARC). Script starts with the offset value from file.

results file will contain all processed instance ids with update status in format (if the results are presented):

   instanceId - status (e.g. 708979eb-c732-4dfa-8f51-8176c9dea6bf - ok)

NOTE!!! This Instance update Postman collection may affect performance of other imports, so it needs to be used during non-working hours or during off-peak hours!!!

NOTE!!! This Postman collection will only work for Kiwi and later releases.

NOTE!!! Postman collection can handle only about 1500 requests.

Before launching Postman collection, set up the environment:

• Click on "eye" button and press "Edit/Add" on "Environment" variables
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• Name the environment and configure these mandatory variables:
  
  • protocol (http/https)
  • url (your library okapi url) - can be seen in the app settings → software versions → okapi services → okapi
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  • username (admin user name)
  • password (admin user name password)
  • xokapitenant (admin tenant).
• There is also an optional parameter "limit" to limit number of instances to parse. Both sources are counted (FOLIO/MARC), but only MARC source types will be processed. Aivar Iusupov If the user sets a limit, does the script start with instance HRID=1 and go until the limit is reached, or can the user specify the start instance HRID or UUID? Ann-Marie Breaux (Deactivated) - No, it will start from UUID (ordering is based only on UUIDs, like in mod_inventory_storage.instance table). And there are also 1 more problem with that: e.g. if we run our script with limit = 10000 and then during the day we import 1000 instances, we can face a problem that between processed entries could be unprocessed UUID because of ordering.
• After setting up all the environment variables press "Reset all" and then "Save"
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1. Import collection by pressing "Import" button 
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2. Select collection file (Update MARC to Instance map.postman_collection.json) file from folder or drag it into open window and then press "Import" button.
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3. Go to the "Collections" tab and select "Update MARC to Instance map"
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4. Then select environment you'd set up
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5. To launch collection press "Run" button below environment selection and in the opened window press "Run Update MARC to Instance map" Aivar Iusupov Just to confirm - this is updating the Instances, not the MARC-to-Instance map. Is that correct? Ann-Marie Breaux (Deactivated) This will apply all the MARC-to-Instance mapping rules on SRS Record and will update Instance.
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