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Improve incremental send speed

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This commit is contained in:
Joshua Boniface
2024-09-30 04:15:17 -04:00
parent 7fac7a62cf
commit 5f7aa0b2d6
1 changed files with 32 additions and 17 deletions
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49
daemon-common/vm.py
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@@ -3467,7 +3467,7 @@ def vm_worker_send_snapshot(
if incremental_parent is not None:
# Diff between incremental_parent and snapshot
celery_message = (
f"Sending diff {incremental_parent}>{snapshot_name} for {rbd_name}"
f"Sending diff {incremental_parent} -> {snapshot_name} for {rbd_name}"
)
else:
# Full image transfer
@@ -3488,6 +3488,10 @@ def vm_worker_send_snapshot(
}
if incremental_parent is not None:
# Createa single session to reuse connections
session = requests.Session()
executor = ThreadPoolExecutor(max_workers=8)
send_params = {
"pool": pool,
"volume": volume,
@@ -3495,36 +3499,47 @@ def vm_worker_send_snapshot(
"source_snapshot": incremental_parent,
}
last_chunk_time = time.time()
total_chunks = 0
def diff_cb_count(offset, length, exists):
nonlocal total_chunks
if exists:
total_chunks += 1
current_chunk = 0
def send_block(block):
response = session.put(
f"{destination_api_uri}/vm/{vm_name}/snapshot/receive/block",
timeout=destination_api_timeout,
headers=send_headers,
params=send_params,
data=block,
verify=destination_api_verify_ssl,
)
response.raise_for_status()
def diff_cb_send(offset, length, exists):
nonlocal last_chunk_time
nonlocal current_chunk
if exists:
data = image.read(offset, length)
block = offset.to_bytes(8, "big") + length.to_bytes(8, "big") + data
response = requests.put(
f"{destination_api_uri}/vm/{vm_name}/snapshot/receive/block",
timeout=destination_api_timeout,
headers=send_headers,
params=send_params,
data=block,
verify=destination_api_verify_ssl,
)
response.raise_for_status()
current_chunk_time = time.time()
chunk_time = current_chunk_time - last_chunk_time
last_chunk_time = current_chunk_time
chunk_speed = round(4 / chunk_time, 1)
executor.submit(send_block, block)
current_chunk += 1
update(
celery,
celery_message + f" ({chunk_speed} MB/s)",
celery_message + f" ({current_chunk}/{total_chunks} objects)",
current=current_stage,
total=total_stages,
)
try:
image.set_snap(snapshot_name)
image.diff_iterate(
0, size, incremental_parent, diff_cb_count, whole_object=True
)
image.diff_iterate(
0, size, incremental_parent, diff_cb_send, whole_object=True
)