On Wed, Jun 17, 2009 at 5:22 AM, Dennis Peterson<[email protected]> wrote: > Sounds good...for your (b) I see that a traverser would easily do it, > or I may do it client-side to show stubs for hidden comments. I'll > also want (a), a global list of high-rated comments, which is why I'm > thinking I'd maintain a list of the top 1000 or so. Comment ratings > will degrade over time so nodes should drop out of this list. >
Yes, traverser for (b) and some type of list for (a). Have a look at the SortedTree and Timeline utilities in index-util component, they may help you to do (a). > I'll want to do something like give a user a sum of the points he's > accrued across his comments...assuming worst case of a couple thousand > comments, would I likely be better off updating his sum whenever a > comment of his is rated, or simply traversing his comments and summing > them up when I need to? > I think traversing will work well when you only have a couple of thousands of comments. > In the event that I'm very lucky and need more than 200 > transactions/s, would it work better to do updates in batches every > few seconds? (Of course I guess then I'd need to temporarily save the > update instructions somewhere outside the system.) > Yes. Having a single thread running a transaction that batches work together will speed things up. > Getting ahead of myself a bit: anything noteworthy about ram requirements? > There is some information about it on the wiki (http://wiki.neo4j.org/content/FAQ). Amount of RAM needed depends on how much data you have. > On 6/16/09, Johan Svensson <[email protected]> wrote: >> ... >> >> Does getting the highest rated comments mean: >> >> a) of all the latest comments since time X, give me the ones that had >> the highest rating >> >> or >> >> b) for this topic / thread, only show comments with rating higher then X _______________________________________________ Neo mailing list [email protected] https://lists.neo4j.org/mailman/listinfo/user
