Hi Rajat

Which version of OpenStack are you running?
I'm running on version Yoga.

Also have you configured the config options in the [DEFAULT] section?
Yes

Can you confirm from the logs by restarting the cinder backup service and checking if the right value is assigned to the config options.
I have try to change backup_workers this value is applied right value.

How to check backup_max_operations is assigned the right value ?

Thanks 
From: Rajat Dhasmana <rdhasman@redhat.com>
Sent: Friday, November 10, 2023 5:18 PM
To: Pureewat Kaewpoi <pureewat.k@bangmod.co.th>
Cc: OpenStack Discuss <openstack-discuss@lists.openstack.org>
Subject: Re: [cinder][backup] backup_max_operations configuration is not working
 
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Hi Pureewat,

Which version of OpenStack are you running? There could be a case where the code doesn't support these config options.
This support was added in Victoria upstream.

Also have you configured the config options in the [DEFAULT] section?
Can you confirm from the logs by restarting the cinder backup service and checking if the right value is assigned to the config options.

Thanks
Rajat Dhasmana


On Fri, Nov 10, 2023 at 3:02 PM Pureewat Kaewpoi <pureewat.k@bangmod.co.th> wrote:
Hi communities

I have set cinder backup with these configurations
backup_max_operations = 4
backup_workers = 4

When I create 20 backups simultaneously
According to logs It still creating backups at the same time.

2023-11-07 06:17:42.029 555360 INFO cinder.backup.manager [] Create backup started, backup: <BACKUP-ID> volume: <VOLUME-ID>
2023-11-07 06:17:42.038 555360 INFO cinder.backup.manager [] Call Volume Manager to get_backup_device for Backup(*TRUNCRATED*)
2023-11-07 06:17:44.328 555360 INFO cinder.backup.manager [] Create backup started, backup: <BACKUP-ID> volume: <VOLUME-ID>
2023-11-07 06:17:44.334 555360 INFO cinder.backup.manager [] Call Volume Manager to get_backup_device for Backup(*TRUNCRATED*)
2023-11-07 06:17:46.665 555360 INFO cinder.backup.manager [] Create backup started, backup: <BACKUP-ID> volume: <VOLUME-ID>
2023-11-07 06:17:46.672 555360 INFO cinder.backup.manager [] Call Volume Manager to get_backup_device for Backup(*TRUNCRATED*)
2023-11-07 06:17:49.005 555360 INFO cinder.backup.manager [] Create backup started, backup: <BACKUP-ID> volume: <VOLUME-ID>
2023-11-07 06:17:49.018 555360 INFO cinder.backup.manager [] Call Volume Manager to get_backup_device for Backup(*TRUNCRATED*)
2023-11-07 06:17:51.378 555360 INFO cinder.backup.manager [] Create backup started, backup: <BACKUP-ID> volume: <VOLUME-ID>
2023-11-07 06:17:51.389 555360 INFO cinder.backup.manager [] Call Volume Manager to get_backup_device for Backup(*TRUNCRATED*)
2023-11-07 06:17:54.004 555360 INFO cinder.backup.manager [] Create backup started, backup: <BACKUP-ID> volume: <VOLUME-ID>
2023-11-07 06:17:54.017 555360 INFO cinder.backup.manager [] Call Volume Manager to get_backup_device for Backup(*TRUNCRATED*)
2023-11-07 06:17:56.094 555360 INFO cinder.backup.manager [] Create backup started, backup: <BACKUP-ID> volume: <VOLUME-ID>
2023-11-07 06:17:56.113 555360 INFO cinder.backup.manager [] Call Volume Manager to get_backup_device for Backup(*TRUNCRATED*)
2023-11-07 06:17:58.523 555360 INFO cinder.backup.manager [] Create backup started, backup: <BACKUP-ID> volume: <VOLUME-ID>
2023-11-07 06:17:58.536 555360 INFO cinder.backup.manager [] Call Volume Manager to get_backup_device for Backup(*TRUNCRATED*)
2023-11-07 06:18:01.017 555360 INFO cinder.backup.manager [] Create backup started, backup: <BACKUP-ID> volume: <VOLUME-ID>
2023-11-07 06:18:01.027 555360 INFO cinder.backup.manager [] Call Volume Manager to get_backup_device for Backup(*TRUNCRATED*)
2023-11-07 06:18:03.146 555360 INFO cinder.backup.manager [] Create backup started, backup: <BACKUP-ID> volume: <VOLUME-ID>
2023-11-07 06:18:03.162 555360 INFO cinder.backup.manager [] Call Volume Manager to get_backup_device for Backup(*TRUNCRATED*)
2023-11-07 06:18:05.622 555360 INFO cinder.backup.manager [] Create backup started, backup: <BACKUP-ID> volume: <VOLUME-ID>
2023-11-07 06:18:05.649 555360 INFO cinder.backup.manager [] Call Volume Manager to get_backup_device for Backup(*TRUNCRATED*)
2023-11-07 06:18:07.800 555360 INFO cinder.backup.manager [] Create backup started, backup: <BACKUP-ID> volume: <VOLUME-ID>
2023-11-07 06:18:07.818 555360 INFO cinder.backup.manager [] Call Volume Manager to get_backup_device for Backup(*TRUNCRATED*)
2023-11-07 06:18:10.129 555360 INFO cinder.backup.manager [] Create backup started, backup: <BACKUP-ID> volume: <VOLUME-ID>
2023-11-07 06:18:10.148 555360 INFO cinder.backup.manager [] Call Volume Manager to get_backup_device for Backup(*TRUNCRATED*)
2023-11-07 06:18:12.684 555360 INFO cinder.backup.manager [] Create backup started, backup: <BACKUP-ID> volume: <VOLUME-ID>
2023-11-07 06:18:12.775 555360 INFO cinder.backup.manager [] Call Volume Manager to get_backup_device for Backup(*TRUNCRATED*)
2023-11-07 06:18:16.356 555360 INFO cinder.backup.manager [] Create backup started, backup: <BACKUP-ID> volume: <VOLUME-ID>
2023-11-07 06:18:16.400 555360 INFO cinder.backup.manager [] Call Volume Manager to get_backup_device for Backup(*TRUNCRATED*)
2023-11-07 06:18:17.480 555360 INFO cinder.backup.manager [] Create backup started, backup: <BACKUP-ID> volume: <VOLUME-ID>
2023-11-07 06:18:17.575 555360 INFO cinder.backup.manager [] Call Volume Manager to get_backup_device for Backup(*TRUNCRATED*)
2023-11-07 06:18:20.227 555360 INFO cinder.backup.manager [] Create backup started, backup: <BACKUP-ID> volume: <VOLUME-ID>
2023-11-07 06:18:20.249 555360 INFO cinder.backup.manager [] Call Volume Manager to get_backup_device for Backup(*TRUNCRATED*)
2023-11-07 06:18:22.115 555360 INFO cinder.backup.manager [] Create backup started, backup: <BACKUP-ID> volume: <VOLUME-ID>
2023-11-07 06:18:22.165 555360 INFO cinder.backup.manager [] Call Volume Manager to get_backup_device for Backup(*TRUNCRATED*)
2023-11-07 06:18:24.379 555360 INFO cinder.backup.manager [] Create backup started, backup: <BACKUP-ID> volume: <VOLUME-ID>
2023-11-07 06:18:24.435 555360 INFO cinder.backup.manager [] Call Volume Manager to get_backup_device for Backup(*TRUNCRATED*)
2023-11-07 06:18:27.681 555360 INFO cinder.backup.manager [] Create backup started, backup: <BACKUP-ID> volume: <VOLUME-ID>
2023-11-07 06:18:28.074 555360 INFO cinder.backup.manager [] Call Volume Manager to get_backup_device for Backup(*TRUNCRATED*)
2023-11-07 06:18:29.440 555360 INFO cinder.backup.manager [] Create backup started, backup: <BACKUP-ID> volume: <VOLUME-ID>
2023-11-07 06:18:30.324 555360 INFO cinder.backup.manager [] Call Volume Manager to get_backup_device for Backup(*TRUNCRATED*)
2023-11-07 06:18:31.846 555360 INFO cinder.backup.manager [] Create backup started, backup: <BACKUP-ID> volume: <VOLUME-ID>
2023-11-07 06:18:31.874 555360 INFO cinder.backup.manager [] Call Volume Manager to get_backup_device for Backup(*TRUNCRATED*)

The expected result is creating 4  backups simultaneously
Have anyone face this issue ? or Do I config a wrong configuration ?

Thanks
Pureewat Kaewpoi