Cbtransfer --single-node does not seem to work

Couchbase Server
1

I am running the following code:

/opt/couchbase/bin/cbtransfer -x data_only=1,batch_max_size=200 -t 2 -v --single-node --destination-operation=add -b mybucket -B mybucket -u administrator -p ‘mypassword’
couchbase://127.0.0.1:8091
couchbase://couchbase.destination.io:8091

But it does not do anything, giving me the following message:

mt cbtransfer…
mt source : couchbase://127.0.0.1:8091
mt sink : couchbase://couchbase.destination.io:8091
mt opts : {‘username’: ‘’, ‘source_vbucket_state’: ‘active’, ‘destination_vbucket_state’: ‘active’, ‘verbose’: 1, ‘dry_run’: False, ‘extra’: {‘max_retry’: 10.0, ‘rehash’: 0.0, ‘data_only’: 1.0, ‘uncompress’: 0.0, ‘nmv_retry’: 1.0, ‘conflict_resolve’: 1.0, ‘cbb_max_mb’: 100000.0, ‘mcd_compatible’: 1.0, ‘try_xwm’: 1.0, ‘backoff_cap’: 10.0, ‘batch_max_bytes’: 400000.0, ‘report_full’: 2000.0, ‘seqno’: 0.0, ‘batch_max_size’: 200.0, ‘report’: 5.0, ‘design_doc_only’: 0.0, ‘recv_min_bytes’: 4096.0}, ‘single_node’: True, ‘bucket_destination’: ‘mybucket’, ‘destination_operation’: ‘add’, ‘vbucket_list’: None, ‘threads’: 2, ‘key’: None, ‘password’: ‘’, ‘id’: None, ‘bucket_source’: ‘mybucket’}
2015-06-14 17:01:21,522: mt bucket: mybucket
.
bucket: mybucket, msgs transferred…
: total | last | per sec
transfer data only. bucket design docs will be skipped.
done

0 msgs transferred… however, mybucket has ~20000000 item counts.

If I do this without --single-node option, it seems work fine.
What would be the reason for this?

2

Hi Dynamicscope,
How many nodes is there in the cluster?

This could happen if there are no documents in the specific node, perhaps due to an uncompleted rebalance operation?

3

@martinesmann Thank you for the reply.

I have 3 nodes. (I performed the script after rebalancing completed.)

(Active / Replica)
Node1: 6.74M / 5.72M
Node2: 5.71M / 6.73M
Node3: 6.75M / 6.75M

I ran the script on every node, resulting the same.
FYI, I am using Couchbase Server 3.0.1 CE. And I don’t have any design docs in source cluster.

4

There’s no node named 127.0.0.1 in your cluster so that’s why you get 0 msg with --single-node.
Do not use 127.0.0.1 as the node source, use the real node name as you see it in the GUI or from “/opt/couchbase/bin/couchbase-cli server-list -c 127.0.0.1”.

5

@robert_hamon_

Awesome~! Problem solved.
So I needed to use the real node name for --single-node option.
Thank you a lot~!