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[Qemu-devel] [PATCH 0/3 v4] Live migration without shared storage
From: |
lirans |
Subject: |
[Qemu-devel] [PATCH 0/3 v4] Live migration without shared storage |
Date: |
Mon, 12 Oct 2009 18:24:45 +0200 |
This series adds support for live migration without shared storage, means
copy the storage while migrating. It was tested with KVM. Supports 2 ways
to replicate the storage during migration:
1. Complete copy of storage to destination
2. Assuming the storage is cow based, copy only the allocated
data, time of the migration will be linear with the amount of allocated
data (user responsibility to verify that the same backend file reside
on src and destination).
The code is being used by the Reservoir project: http://www.reservoir-fp7.eu/
Live migration will work as follows:
(qemu) migrate -d tcp:0:4444 # for ordinary live migration
(qemu) migrate -d blk tcp:0:4444 # for live migration with complete storage copy
(qemu) migrate -d blk inc tcp:0:4444 # for live migration with incremental
storage copy, storage is cow based.
These patches addresses all previous comments.
Signed-off-by: Liran Schour <address@hidden>
---
Makefile | 1 +
block-migration.c | 624 +++++++++++++++++++++++++++++++++++++++++++++++++++++
block-migration.h | 30 +++
block.c | 27 +++
block.h | 6 +-
block_int.h | 1 +
buffered_file.c | 10 +-
hw/hw.h | 9 +-
migration-exec.c | 9 +-
migration-fd.c | 7 +-
migration-tcp.c | 7 +-
migration-unix.c | 7 +-
migration.c | 21 ++-
migration.h | 20 ++-
monitor.c | 38 +++-
qemu-monitor.hx | 13 +-
savevm.c | 62 ++++--
sysemu.h | 2 +-
vl.c | 6 +-
19 files changed, 851 insertions(+), 49 deletions(-)