Hello!
The questions on similar issue were asked before, but I still can't find
complete answers, so I'd like to repeat it.
I'm using OrientDB 2.1.0 GA Community Edition and trying to setup
distributed configuration.
I have 2 nodes ("node1", "node2") which are perfectly connected into group.
When node2 is starting, I see in console handshake between nodes and
replication of my db scheme from node1 to node2. The issue is how to
configure distributing data inserts between nodes.
I've created class "metrics" on node1, default cluster "metrics" was
created automatically. After starting of node2 new cluster "metrics_node2"
was created. I saw in console distributed configuration for this cluster:
{
...
"clusters": {
...
"metrics" : { "servers": [ "node1", "node2", "<NEW_NODE>" ] } ,
"metrics_node2": { "servers": [ "node2", "node1", "<NEW_NODE>" ] },
...
}
which means, as far as I understand, that cluster are assigned to all
nodes, so I've changed it to
{
...
"clusters": {
...
"metrics" : { "servers": [ "node1" ] } ,
"metrics_node2": { "servers": [ "node2" ] },
...
}
Now I supposed that all record of cluster "metrics" will be located on
node1, and all records of "metrics_node2" on node2. The next question is
how to distribute inserts between clusters. Now all inserts from client are
still saved into default cluster "metrics". Client is pretty simple,
written in java, saving looks like this:
new ODocument("metrics").fromJson(jsonString).save();
I've read
docs http://orientdb.com/docs/last/Distributed-Sharding.html#limitation and
it look like I should specify cluster directly during save to get data
inserts distributed between nodes, i.e.
new ODocument("metrics").fromJson(jsonString).save("metrics_node2");
It look a bit strange to me, cause I thought that data sharding should be
transparent for application, client should know nothing about DB
configuration. Are there any ways to make auto-sharding working?
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