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Posted to issues@kvrocks.apache.org by GitBox <gi...@apache.org> on 2022/09/25 15:46:46 UTC

[GitHub] [incubator-kvrocks] tanruixiang commented on issue #918: support Multi-disk(Multi-path)

tanruixiang commented on issue #918:
URL: https://github.com/apache/incubator-kvrocks/issues/918#issuecomment-1257221420

   > Hi @xiaobiaozhao, I have two questions:
   > 
   > 1. Why can multiple disks improve performance? Multiple paths do not seem to work in parallel.
   > 2. How do we judge hot and cold data in kvrocks? Rocksdb simply determines where to place the SST based on when the SST was generated.
   
   According to the description of the configuration, the lower level SST will be stored in the front of the `db_paths`. So we can arrange the `db_paths` according to the speed of the storage medium, and put the low-level SST in the faster storage medium, for example, put the SSD in the first of the `db_paths` to storage the low-level SST.


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