cinder/backup_max_operations-27753c748ba1dc1a.yaml at 0fc4e39227b21cf26cbe3eb8fdc40d2213c8b019 - cinder - OpenDev: Free Software Needs Free Tools

openstack/cinder

Gorka Eguileor 30c2289c9b Backup: Limit number of concurent operations

This patch adds the backup_max_operations configuration option that
limits the number of concurrent backup and restore operations.

These operations can consume large amounts of RAM, so we should limit
them according to our system resources to avoid processes being killed
because we run out of memory.

The default is 15 concurrent operations, which could use up to 85GB
of RAM(in case of ceph which uses the maximum memory for this operation).
More details are added in the document.

Closes-Bug: #1865011
Co-authored-by: Rajat Dhasmana <rajatdhasmana@gmail.com>
Change-Id: Ica4e0cea67bc894f61a57c7898977951ce3a3633

2020-06-19 09:30:43 +02:00

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 features:
   - |
     We can now limit the number of concurrent backup/restore operations that a
     Cinder backup service can perform using the ``backup_max_operations``
     configuration option.