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Posted to solr-user@lucene.apache.org by 尚平平 <pi...@163.com> on 2016/09/20 03:35:05 UTC

solr index in hdfs perfomance

Hi, 
    I am  learning solr rencently, and I have some problems. Please help me and I will thank you very much.
    I stored indexes in HDFS directory, the update performance I got with solrmeter showed  that:
     (1)  the perfomance that storing index in local filesystem is about 7 timesbetter than the performance that storing index in HDFS (the block replication of hdfs is 3 ).
     (2) if I store index in hdfs, the preformance that setting the block replication of hdfs to 1 is worse than the performance that setting the block replication of hdfs to 3.


    Could you help me to explain the performance difference?  If the result I got is wrong, How much the performance difference should be ?
   Thank you very much.


Best regards.
Pingping Shang