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openstack-manuals/doc/config-reference/source/tables/nova-livemigration.rst
Gauvain Pocentek 26510e84dd [config-ref] Publish the RST version
Change-Id: Ia9dc15869ab201a787eecd479252282f0ae9113b
Implements: blueprint config-ref-rst
2015-12-21 09:44:24 +01:00

3.0 KiB

Description of live migration configuration options
Configuration option = Default value Description
[DEFAULT]
live_migration_retry_count = 30 (IntOpt) Number of 1 second retries needed in live_migration
max_concurrent_live_migrations = 1 (IntOpt) Maximum number of live migrations to run concurrently. This limit is enforced to avoid outbound live migrations overwhelming the host/network and causing failures. It is not recommended that you change this unless you are very sure that doing so is safe and stable in your environment.
[libvirt]
live_migration_bandwidth = 0 (IntOpt) Maximum bandwidth(in MiB/s) to be used during migration. If set to 0, will choose a suitable default. Some hypervisors do not support this feature and will return an error if bandwidth is not 0. Please refer to the libvirt documentation for further details
live_migration_completion_timeout = 800 (IntOpt) Time to wait, in seconds, for migration to successfully complete transferring data before aborting the operation. Value is per GiB of guest RAM + disk to be transferred, with lower bound of a minimum of 2 GiB. Should usually be larger than downtime delay * downtime steps. Set to 0 to disable timeouts.
live_migration_downtime = 500 (IntOpt) Maximum permitted downtime, in milliseconds, for live migration switchover. Will be rounded up to a minimum of 100ms. Use a large value if guest liveness is unimportant.
live_migration_downtime_delay = 75 (IntOpt) Time to wait, in seconds, between each step increase of the migration downtime. Minimum delay is 10 seconds. Value is per GiB of guest RAM + disk to be transferred, with lower bound of a minimum of 2 GiB per device
live_migration_downtime_steps = 10 (IntOpt) Number of incremental steps to reach max downtime value. Will be rounded up to a minimum of 3 steps
live_migration_flag = VIR_MIGRATE_UNDEFINE_SOURCE, VIR_MIGRATE_PEER2PEER, VIR_MIGRATE_LIVE, VIR_MIGRATE_TUNNELLED (StrOpt) Migration flags to be set for live migration
live_migration_progress_timeout = 150 (IntOpt) Time to wait, in seconds, for migration to make forward progress in transferring data before aborting the operation. Set to 0 to disable timeouts.
live_migration_uri = qemu+tcp://%s/system (StrOpt) Migration target URI (any included "%s" is replaced with the migration target hostname)