# Update through a massive update job

Metadata update job creation is accessible from the _Active preservation_ section and later on, by selecting _Object metadata update jobs_. Through this type of update jobs, LIBSAFE allows for massive object metadata updates, and this is particularly advisable when we want to update metadata in a large collection of objects.

![](https://1027461619-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MjAMV2uTheGBDHeGhtb%2F-MjZk-DW-XI8u2Ghhm9m%2F-MjZkE-nGMLHVLKUBaG1%2Fimage.png?alt=media\&token=bb7b9e2d-f51c-42c3-af4a-228440910b37)

In the main screen of metadata update jobs, all the metadata update jobs are shown classified by status, to provide more clarity in their organization. At the beginning of the page/screen we can also see the _Create new metadata update job_ link. It will create a metadata update job, waiting for the user to initiate it.

When we create a metadata update job, we also create a folder in the directory configured for that purpose. In said folder, we must deposit the file(s) containing all operations related to the object descriptors.

Once the metadata operation files have been added to the metadata update job, we can initiate the job by accessing the main screen of update jobs and clicking _initiate_ on the update job we want to initiate; thus we will access the job start screen. The system will check if the folder created for this job contains files for the update job, and will allow starting the job.

![](https://1027461619-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MjAMV2uTheGBDHeGhtb%2F-MjZk-DW-XI8u2Ghhm9m%2F-MjZkPXHZ02DVPaLQfUl%2Fimage.png?alt=media\&token=530c5a2c-39e3-47fa-a4e4-fe00b00c4366)

Once the update job is finished, its detail can be accessed; the differences, regardless of whether the result of the job is correct or incorrect, will only appear in the information shown.
