Thanks Erick, I got it from TestHashPartitioner.java
https://github.com/apache/lucene-solr/blob/1d85cd783863f75cea133fb9c452302214165a4d/solr/core/src/test/org/apache/solr/cloud/TestHashPartitioner.java Here is a sample code router = DocRouter.getDocRouter(CompositeIdRouter.NAME); int shardsCount = 12; solrCollection = createCollection(shardsCount, router); SolrInputDocument document = getSolrDocument(item); //need to implement this method to get SolrInputDocument String id = "1874f9aa-4cad-4839-a282-d624fe2c40c6" Slice slice = router.getTargetSlice(id, document, null, null, solrCollection ); String shardName = slice.getName(); // shard1, shard2, ... etc //Helper methods from DocCollection createCollection(int nSlices, DocRouter router) { List<DocRouter.Range> ranges = router.partitionRange(nSlices, router.fullRange()); Map<String,Slice> slices = new HashMap<>(); for (int i=0; i<ranges.size(); i++) { DocRouter.Range range = ranges.get(i); Slice slice = new Slice("shard"+(i+1), null, map("range",range)); slices.put(slice.getName(), slice); } DocCollection coll = new DocCollection("collection1", slices, null, router); return coll; } public static Map map(Object... params) { LinkedHashMap ret = new LinkedHashMap(); for (int i=0; i<params.length; i+=2) { Object o = ret.put(params[i], params[i+1]); // TODO: handle multi-valued map? } return ret; } Mahmoud On Fri, Dec 14, 2018 at 7:06 PM Mahmoud Almokadem <prog.mahm...@gmail.com> wrote: > Thanks Erick, > > You know how to use this method. Or I need to dive into the code? > > I've the document_id as string uniqueKey and have 12 shards. > > On Fri, Dec 14, 2018 at 5:58 PM Erick Erickson <erickerick...@gmail.com> > wrote: > >> Sure. Of course you have to make sure you use the exact same hashing >> algorithm on the <uniqueKey>. >> >> See CompositeIdRouter.sliceHash >> >> Best, >> Erick >> On Fri, Dec 14, 2018 at 3:36 AM Mahmoud Almokadem >> <prog.mahm...@gmail.com> wrote: >> > >> > Hello, >> > >> > I've a corruption on some of the shards on my collection and I've a full >> > dataset on my database, and I'm using CompositeId for routing documents. >> > >> > Can I traverse the whole dataset and do something like hashing the >> > document_id to identify that this document belongs to a specific shard >> to >> > send the desired documents only instead of reindex the whole dataset? >> > >> > Sincerely, >> > Mahmoud >> >
