NIC: Intel I350 (10/100/1000Mbps)
Host OS: CentOS 7 64-bit
Guest OS: RHEL 6.5 64-bit
-Parameter: qemu-system-x86_64 -enable-kvm -smp 4 -m 4096
+Parameter: qemu-system-x86_64 -accel kvm -smp 4 -m 4096
/share/ia32e_rhel6u5.qcow -monitor stdio
There is no additional application is running on the guest when doing
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1. Verify both the source and destination QEMU are able
to support the multiple thread compression migration:
- {qemu} info_migrate_capabilities
+ {qemu} info migrate_capabilities
{qemu} ... compress: off ...
2. Activate compression on the source:
{qemu} migrate_set_capability compress on
3. Set the compression thread count on source:
- {qemu} migrate_set_parameter compress_threads 12
+ {qemu} migrate_set_parameter compress-threads 12
4. Set the compression level on the source:
- {qemu} migrate_set_parameter compress_level 1
+ {qemu} migrate_set_parameter compress-level 1
5. Set the decompression thread count on destination:
- {qemu} migrate_set_parameter decompress_threads 3
+ {qemu} migrate_set_parameter decompress-threads 3
6. Start outgoing migration:
{qemu} migrate -d tcp:destination.host:4444
The following are the default settings:
compress: off
- compress_threads: 8
- decompress_threads: 2
- compress_level: 1 (which means best speed)
+ compress-threads: 8
+ decompress-threads: 2
+ compress-level: 1 (which means best speed)
So, only the first two steps are required to use the multiple
thread compression in migration. You can do more if the default