21 Aug
2019
21 Aug
'19
2:44 p.m.
On Tue, Aug 20, 2019 at 10:04 PM Zaharo Bai (白战豪)-云数据中心集团
<baizhanhao01(a)inspur.com> wrote:
Hi jason:
I have a question I would like to ask you, Is the current image migration and
openstack adapted? according to my understanding, openstack’s previous live-migration
logic is implemented in cinder, just call librbd rbd_read/write API to do Data migration.
I believe the existing Cinder volume block live-migration is just a
wrapper around QEMU's block live-migration functionality, so indeed it
would just be a series of RBD read/write API calls between two
volumes. The built-in RBD live-migration is similar but it copies
snapshots and preserves image sparseness during the migration process.
Because Cinder is using the QEMU block live-migration functionality,
it's not tied into RBD's live-migration.
Best wishes
Zaharo
--
Jason