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From Jonathan Colby <>
Subject Re: unrepairable sstable data rows
Date Mon, 11 Apr 2011 10:08:05 GMT
Thanks for the answer Aaron. 

There are Data, Index, Filter, and Statistics files associated with SSTables.   What files
must be physically moved/deleted? 

I tried just moving the Data file and Cassandra would not start. I see this exception:

 WARN [WrapperSimpleAppMain] 2011-04-11 12:04:23,239 (line 493) Removing
orphans for /var/lib/cassandra/data/DFS/main-f-5: [Data.db]
ERROR [WrapperSimpleAppMain] 2011-04-11 12:04:23,240 (line 333)
Exception encountered during startup.
java.lang.AssertionError: attempted to delete non-existing file main-f-5-Data.db
    at org.apache.cassandra.db.ColumnFamilyStore.scrubDataDirectories(
        at org.apache.cassandra.service.AbstractCassandraDaemon.setup(

On Apr 11, 2011, at 2:14 AM, aaron morton wrote:

> But if you wanted to get fresh data on the node, a simple approach is to delete/move
just the SSTable that is causing problems then run a repair. That should reduce the amount
of data that needs to be moved. 

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