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From Mck <>
Subject Re: IOException: Unable to create hard link ... /snapshots/ ... (errno 17)
Date Tue, 03 May 2011 18:38:59 GMT
On Tue, 2011-05-03 at 16:52 +0200, Mck wrote:
> Running a 3 node cluster with cassandra-0.8.0-beta1 
> I'm seeing the first node logging many (thousands) times 

Only "special" thing about this first node is it receives all the writes
from our sybase->cassandra import job.
This process migrates an existing 60million rows into cassandra (before
the cluster is /turned on/ for normal operations). The import job runs
over ~20minutes.

I wiped everything and started from scratch, this time running the
import job with cassandra configured instead with:

incremental_backups: false
snapshot_before_compaction: false

This created the problem then on another node.
So changing to these settings on all nodes and running the import again
fixed it: no more "Unable to create hard link ..."

After the import i could turn both incremental_backups and
snapshot_before_compaction to true again without problems so far.

To me this says something is broken with incremental_backups and
snapshot_before_compaction under heavy writing?


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