I am having Jmeter 5.3 and trying to generate a Report from existing CSV file, using below command

I have a regular expression that returns the below value:

I have a data file with each line representing a REST API payload message. The requirement is to send 2k messages in batches of 100 every minute. Is it possible to do this in Jmeter? If so, how can I design the test ( which timer to use)?
Thanks.

I had created a project using Jmeter and created thread group and one Http Request sampler.

I have the data in a text (.txt) file and not in CSV. Each line is a long JSON message. I need to read the file line by line and pass it to JSON body of my REST API message. I tried using a JDBC pre-processor using Groovy but it gets only ne line. Any help would be appreciated.

I had created a project using Jmeter and created thread group and one Http Request sampler.

New to JMeter and trying to make a HTTP Request. Here is an overview of my Thread Group:

I am using jMeter and I need to extract the value from variable.

My JSON message body will have an array of 1 or more objects and each object in the array will be populated with few attributes. I need to populate the value for one of the attributes called ‘ID’ by obtaining a random value from PostGresSQL Database. I have done it successfully for 1 object in the REST API Message body – by generating a random number (Jmeter random variable), passing it to DataBase using a sql query via JDBC PreProcessor sampler to get the ID. It works fine when there is only 1 object in the array but I am unsure how to pass & get more values if the array has more than 1 object. Any help/suggestion would be helpful.
Thanks,
NP

I need to pass an authentication token from one api to next. I have tried json extractor as follows. But the next api [is still giving 401 unauthorized. Tried second api with direct token and it works