No, --id-type actual would but then you have to make sure to have globally unique incrementing id's without large holes in the distribution.
> Am 15.06.2015 um 21:31 schrieb Zongheng Yang <[email protected]>: > > I see. Would setting the `--processors 1` flag for neo4j-import make > internal ids and external ids match in my case? (I understand this is an > implementation detail and not a user-facing property.) > > On Monday, June 15, 2015 at 12:07:56 PM UTC-7, Michael Hunger wrote: >> GraphDatabaseService#getNodeById(long id) > > takes Neo4j internal ids. > > Michael > >> Am 15.06.2015 um 20:59 schrieb Zongheng Yang <zongh...@ <>gmail.com >> <http://gmail.com/>>: >> >> Hi Mattias, >> >> Thanks for looking into this. I understand the difference between Neo4j >> internal ids vs. the ids supplied in the csv. >> >> However for say GraphDatabaseService#getNodeById(long id), does this >> function take the user-supplied ids or Neo4j's internal ids? >> >> If it is the former: then the conceptual mismatch doesn't fully explain the >> problem (e.g. I queried the nodes/edges using user-supplied ids, and the >> internal ids should not mess up with the query results). If it is the >> latter, then for users programming using the Java Core API, how should they >> get these correct internal ids (they only know application-supplied ids). >> >> Best, >> Zongheng >> >> On Monday, June 15, 2015 at 5:23:24 AM UTC-7, Mattias Persson wrote: >> Hello again, I'm quite confident I know what's happening here. The problem >> is the misconception that your INTEGER ids defined in the csv files will map >> 1-to-1 to the neo4j node/relationship ids in the store. They will actually >> match in most cases, but that's merely a coincidence. >> >> What you're seeing is the result of some parallelism happening in the >> importer where batches of 10k nodes/relationships flows through different >> steps, where some steps may execute multiple batches in parallel and doesn't >> care if reordering happens. Ids are assigned at the end. >> >> You're looking at the ids and see that they mismatch, but if you look at >> their data you should see that all relationships match the csv files. So >> please disregard the seemingly close match of neo4j node/relationship ids >> with the csv input ids as they are quite different in nature. >> >> On Thursday, June 11, 2015 at 11:32:55 AM UTC+2, Mattias Persson wrote: >> Hi, I'm one of the main authors of the import tool and I find this issue >> quite interesting. >> >> Would you be able to share your dataset with me personally, for the single >> purpose of trying to find the root cause? >> >> On Friday, June 5, 2015 at 5:12:43 AM UTC+2, Zongheng Yang wrote: >> Hi all, >> >> I'm using neo4j-import to import nodes and relationships from csv files. >> Let's say node id 538398 has about 100 edges and >> >> 538398 -> 370047 >> 538398 -> 379981 >> >> are just two of them. After the import, the neo4j database actually >> >> - *loses* these two edges >> - instead *corrupts* the destination ids, as follows >> >> 538398 -> 380047 >> 538398 -> 389981 >> >> - *keeps* all other outgoing edges of 538398 correct >> >> The problem seems to be non-deterministic: doing a `rm -rf dbPath` and >> re-running neo4j-import seems to fix the issue, for this particular node -- >> but I've not done extensive tests to see whether other nodes get corrupted >> in this way. >> >> Has anyone seen this before? The graph has on the order of 1 million node, >> average degree 40. >> >> Zongheng >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Neo4j" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to neo4j+un...@ <>googlegroups.com <http://googlegroups.com/>. >> For more options, visit https://groups.google.com/d/optout >> <https://groups.google.com/d/optout>. > > > -- > You received this message because you are subscribed to the Google Groups > "Neo4j" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] > <mailto:[email protected]>. > For more options, visit https://groups.google.com/d/optout > <https://groups.google.com/d/optout>. -- You received this message because you are subscribed to the Google Groups "Neo4j" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
