Neo4j version : 2.0.0-M06 .
Operating System : linux
Ram : 4GB
sir we get slow when we get 2nd degree friends for a user.Then most of
People Suggest to create more relation :
So we are creating more relation to make it faster.
Code for creating relation : Using Java API :
public void addFriend(Person otherPerson) {
if (!this.equals(otherPerson)) {
//check if already created
Relationship friendRel = getFriendRelationshipTo(otherPerson);
if (friendRel == null) {
underlyingNode.createRelationshipTo( otherPerson.getUnderlyingNode(), KNOW);
}
}
}
private Relationship getFriendRelationshipTo(Person otherPerson) {
Node otherNode = otherPerson.getUnderlyingNode();
for (Relationship rel :
underlyingNode.getRelationships(Direction.OUTGOING,KNOW)) {
if (rel.getOtherNode(underlyingNode).equals(otherNode)) {
return rel;
}
}
return null;
}
On Fri, Jan 3, 2014 at 6:57 PM, Michael Hunger <
michael.hun...@neopersistence.com> wrote:
> You have to share more details.
>
> what versions do you use
> what is your stack
> what APIs do you use
> share the code to create the relationships
> what is getting slow
> how many concurrent users do you have
>
> etc.
>
> Sometimes a slowdown is related to doing just one single update per
> transaction and having millions of those tiny transactions.
> So it makes sense to aggregate those changes into larger chunks, e.g. all
> create your knows relationships in one TX (and the other ones too).
>
> Perhaps something that might help you:
> http://maxdemarzi.com/2013/09/05/scaling-writes/
>
> Michael
> Am 03.01.2014 um 14:09 schrieb Navrattan Yadav <
> navrattan.craterz...@gmail.com>:
>
> Hi ...
> Currently we have 1.5 million node and one relation : KNOW between
> them.
>
> Basic Model is : when a user register we add KNOW relation to all his
> friends. (friends are :phone book friends)
>
> Now its getting slow as user increase. so we want to add more relation
> based on : COUNTRY, SOCIAL NETWORK, CITY, COLLEGE ETC.
>
> so we need to add these relation in existing node without blocking
> database by running a separate thread.
>
> Please suggest some way,some query . how we can do this....
>
>
>
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*Thanks and Regards*
*Navrattan Yadav*
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