Hi All,

Thank you for replying. I didn’t have think about the case which multi core 
exists in the same server.
I saw SOLR-6671 and found out that helping me well! I’m looking forward to 
merge and release it.

Thank you,

Takumi

2017/05/26 7:17 に、"Erick Erickson" <erickerick...@gmail.com> を書き込みました:

    Ahhh, as usual Jan is far ahead of the curve ;)
    
    On Thu, May 25, 2017 at 2:18 PM, Jan Høydahl <jan....@cominvent.com> wrote:
    > Yea, having exact dataDir as a system property is a flawed design dating
    > back before distributed Solr…
    > See https://issues.apache.org/jira/browse/SOLR-6671 for my proposal to 
solve
    > the user requirement
    > of placing ALL data dirs on a separate volume. The patch is almost ready 
for
    > commit…
    >
    > Please review and comment :)
    >
    > --
    > Jan Høydahl, search solution architect
    > Cominvent AS - www.cominvent.com
    >
    > 25. mai 2017 kl. 22.21 skrev Shawn Heisey <apa...@elyograg.org>:
    >
    > On 5/25/2017 2:05 AM, takumi yoshida wrote:
    >
    > I wounder if we add new parameter dataDir for collection CREATE
    > command. There have been dataDir for ADDREPLICA command. So, if we add
    > dataDir for CREATE too, it would be more easy to handle data directory
    > when we make new collection with new disk or NFS, etc ...
    >
    >
    > I'm with Erick.  The danger of creating multiple cores on the same
    > server with exactly the same dataDir is simply too high.  It doesn't
    > make sense to add a dataDir parameter to the Collections API CREATE.
    >
    > By editing core.properties files on an individual server after the
    > collection is created to add the dataDir property, and restarting Solr,
    > you can move a dataDir.  The location would be relative to the place the
    > core.properties file is found.  This could be dangerous, but done
    > correctly, would work.
    >
    > Thanks,
    > Shawn
    >
    >
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