I am trying to migrate data from Jira to my Salesforce. I have to import a huge amount of tickets (~6000 records), comments (~70000 records) and attachments (~50000 records). I researched and found that I can use Data Loader with Bulk Api enabled.

I split my data and process 1000 tickets (import 1000 cases, CaseComments for 1000 tickets, ContentVersions for 1000 tickets) at a time. I successfully upserted 1000 cases, then I tried to insert 10340 comments for that 1000 cases and I got all of them failed.
Check error log, I saw many errors:

CANNOT_INSERT_UPDATE_ACTIVATE_ENTITY:CaseCommentTrigger: execution of AfterInsert

caused by: ConnectApi.RateLimitException: You have reached the Connect API's hourly request limit for this user and application.  Please try again later.

Class.ConnectApi.ChatterFeeds.postFeedElement: line 1458, column 1
Class.CaseCommentHandler: line 223, column 1
Trigger.CaseCommentTrigger: line 21, column 1

This is the settings I used:

<bean id="CaseCommentInsertClosed_0-999" class="com.salesforce.dataloader.process.ProcessRunner" singleton="false">
      <description>description</description>
      <property name="name" value="csvCaseCommentInsertClosed_0-999"/>
      <property name="configOverrideMap">
         <map>
            <entry key="sfdc.timeoutSecs" value="600"/>
            <entry key="sfdc.bulkApiCheckStatusInterval" value="10000"/>
            <entry key="sfdc.debugMessages" value="true"/>
            <entry key="sfdc.debugMessagesFile" value="C:\Jira_SF_Data\DataLoader_Log\CaseCommentInsertClosed_0-999SoapTrace.log"/>
            <entry key="sfdc.endpoint" value="myenpoint"/>
            <entry key="sfdc.username" value="myuser"/>
            <entry key="sfdc.password" value="mypassword"/>
            <entry key="sfdc.entity" value="CaseComment"/>
            <entry key="process.operation" value="insert"/>
            <entry key="process.mappingFile" value="C:\Users\OPSWAT\OneDrive - OPSWAT\Jira2SF_Migration\Jira2SF\Mappings\CaseComment.sdl"/>
            <entry key="dataAccess.name" value="C:\Jira_SF_Data\CSV_Data\CaseComment_Closed_0-999.csv"/>
            <entry key="process.outputSuccess" value="C:\Jira_SF_Data\DataLoader_Log\CaseCommentInsertClosed_0-999_success.csv"/>
            <entry key="process.outputError" value="C:\Jira_SF_Data\DataLoader_Log\CaseCommentInsertClosed_0-999_error.csv"/>
            <entry key="dataAccess.type" value="csvRead"/>
            <entry key="dataAccess.readUTF8" value="true"/>
            <entry key="sfdc.externalIdField" value=""/>
            <entry key="sfdc.extractionSOQL" value=""/>
            <entry key="sfdc.useBulkApi" value="true"/>
            <entry key="sfdc.bulkApiSerialMode" value="true"/>
            <entry key="sfdc.truncateFields" value="true"/>
            <entry key="sfdc.writeBatchSize" value="1000"/>
            <entry key="sfdc.readBatchSize" value="100"/>
            <entry key="sfdc.loadBatchSize" value="200"/>
         </map>
      </property>
   </bean>

I found this document about Bulk API limit (https://developer.salesforce.com/docs/atlas.en-us.salesforce_app_limits_cheatsheet.meta/salesforce_app_limits_cheatsheet/salesforce_app_limits_platform_bulkapi.htm). I am using DataLoader with Bulk Api v1. But I don't think I exceed the limit with those settings or maybe I am misunderstanding.

Please advise how to avoid exceeding the rate limit.

Thanks in advance.