[Linux-cluster] gfs+nfs+lucene, anyone had tried?

[Steven Whitehouse]

Hi,

Did you set fsid= on the export? Which NFS version are you using?

Steve.

On Wed, 2010-04-21 at 17:00 +0200, ESGLinux wrote:
> HI, 
> 
> 
> look at the error that happens when two nodes are writing to the
> index:
> 
> 
>  java.io.IOException: Stale NFS file handle
>         at java.io.RandomAccessFile.writeBytes(Native Method)
>         at java.io.RandomAccessFile.write(RandomAccessFile.java:466)
>         at
> org.apache.lucene.store.FSIndexOutput.flushBuffer(FSDirectory.java:503)
>         at
> org.apache.lucene.store.BufferedIndexOutput.flush(BufferedIndexOutput.java:84)
>         at
> org.apache.lucene.store.BufferedIndexOutput.close(BufferedIndexOutput.java:98)
>         at
> org.apache.lucene.store.FSIndexOutput.close(FSDirectory.java:506)
>         at
> org.apache.lucene.index.FieldsWriter.close(FieldsWriter.java:48)
>         at
> org.apache.lucene.index.SegmentMerger.mergeFields(SegmentMerger.java:191)
>         at
> org.apache.lucene.index.SegmentMerger.merge(SegmentMerger.java:88)
>         at
> org.apache.lucene.index.IndexWriter.mergeSegments(IndexWriter.java:709)
>         at
> org.apache.lucene.index.IndexWriter.mergeSegments(IndexWriter.java:686)
>         at
> org.apache.lucene.index.IndexWriter.optimize(IndexWriter.java:543)
>      
> I think in this case one node has writen to the index and the other
> don´t. Could it be a problem? does GFS anything with this situation?
> 
> 
> Thanks, 
> 
> 
> ESG
> 
> 
> 
> 2010/4/21 Jeff Sturm <jeff.sturm at eprize.com>
>         We use Lucene over GFS (no NFS), but the design of our
>         application updates Lucene from only one node at a time.
>         
>          
>         
>         In general applications that utilize POSIX locking can handle
>         concurrent updates safely on GFS even with multiple nodes.  It
>         wasn't clear to us whether Lucene supports this, however, and
>         in your case NFS adds a layer to the mix.
>         
>          
>         
>         From:linux-cluster-bounces at redhat.com
>         [mailto:linux-cluster-bounces at redhat.com] On Behalf Of
>         ESGLinux
>         Sent: Wednesday, April 21, 2010 8:22 AM
>         To: linux clustering
>         Subject: [Linux-cluster] gfs+nfs+lucene, anyone had tried?
>         
>         
>         
>          
>         
>         Hi All, 
>         
>          
>         
>         
>         I´m mounting a cluster using NFS over GFS and I´m going to
>         store a lucene index on it. 
>         
>         
>          
>         
>         
>         There are two nodes that write in this index, and I´m worried
>         about the index corruption.
>         
>         
>          
>         
>         
>         So anyone have implemented something like this? any problem I
>         can find?
>         
>         
>          
>         
>         
>         Thanks in advance, 
>         
>         
>          
>         
>         
>         ESG
>         
>         
>          
>         
>         
>          
>         
>         
>         
>         --
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>         Linux-cluster at redhat.com
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> 
> 
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