EFCore.BulkExtensions | Entity Framework EF Core efcore Bulk Batch Extensions | SQL Database library

I'm using EFCore.BulkExtensions to insert batches of, at most, 100,000 records into a database.

My issue is, for some reason, BulkInsertAsync does not insert any records to the DB. I understand it's an asynchronous call, but I've waited half an hour and no data was inserted. The regular, synchronous BulkInsert call works, but is extremely suboptimal since it hogs a ton of process time.

Does anyone have any idea why BulkInsertAsync doesn't work in this context, but BulkInsert does?

Here is the relevant code, which marshals binary data (transmitted from another machine) into a C struct, adds that C struct to a list, and then bulk-inserts the list into the database.

I am using BulkInsertOrUpdateAsync method to upsert the 20000 records in net-core 3.0. There is no error at all when doing this. it is upserting all the record with parent and child entity into database.

Is there way with EF Core Bulk extensions to only update first few 10000 rows? write message, update next batch, write message in loop until complete?

I know there is Batch Size, however if there is only 5 million to update, and I want only update a certain amount, write a message, in continual loop until complete, how can this be done?

Should I use Top or Take?

I want to write "Hello", every few batches.

I need to do bulk insert in ASP.NET Boilerplate and I tried to implement EFCore.BulkExtensions after reading https://github.com/aspnetboilerplate/aspnetboilerplate/issues/4397 .

I installed the latest EFCore.BulkExtensions from nuget into the project and I tried to use doContext as below so that I can use wherever required.

I'm trying to use bulkinsert from EFCore.BulkExtensions in .NET Core 2.1 with one to one relationships. I have 2 Database Entities

I'm using EFCore BulkExtensions 2.5.0 with Entity Framework Core 2.2.3 and EFCore.SQLite 2.2.6.

I have code like this:

I am getting the following error while using bulk insert from EF core bulk extensions:

Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'index') at System.Collections.Generic.List1.get_Item(Int32 index) at EFCore.BulkExtensions.TableInfo.UpdateEntitiesIdentity[T](IList1 entities, IList1 entitiesWithOutputIdentity) at EFCore.BulkExtensions.TableInfo.LoadOutputData[T](DbContext context, IList1 entities) at EFCore.BulkExtensions.SqlBulkOperation.Merge[T](DbContext context, IList1 entities, TableInfo tableInfo, OperationType operationType, Action1 progress) at EFCore.BulkExtensions.DbContextBulkExtensions.BulkInsert[T](DbContext context, IList1 entities, BulkConfig bulkConfig, Action1 progress)
at MyProject.Data.Repository.Repository1.CreateRange(List1 entities)

I have a parent entity and child entity. What I am trying to do is, first bulk insert parent and then assign Ids generated for parent to their children. Then bulk insert children.

CreateRange method: