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From aaron morton <>
Subject Re: How to use Write Consistency 'ANY' with SSTABLELOADER - DSE Cassandra 1.1.9
Date Mon, 29 Apr 2013 20:17:09 GMT
Is this a once off data load or something you need to do regularly?

One option you have with RF3 and 3 Nodes is to place a copy of all the SSTables on each node
and use nodetool refresh to directly load the sstables into the node without any streaming.

> 1. Please can anyone suggest how we can enforce Write Consistency level when using SSTABLELOADER?
Bulk Loader does not use CL, it's more like a repair / bootstrap. 
If you have to skip a node then use repair. 


Aaron Morton
Freelance Cassandra Consultant
New Zealand


On 30/04/2013, at 1:05 AM, wrote:

> Hi All, 
> We have a requirement to load approximately 10 million records, each record with approximately
100 columns. We are planning to use the Bulk-loader program to convert the data into SSTables
and then load them using SSTABLELOADER. 
> Everything is working fine when all nodes are up and running and the performance is very
good. However, when a node is down, the streaming fails and the operation stops. We have to
run the SSTABLELOADER with option 'I' to exclude the node that is down. I was wondering if
we can enforce Consistency level of 'ANY' with SSTABLELOADER as well. 
> We tried specifying the consistency level 'ANY' at Keyspace level. However, this is not
being used by the SSTABLELOADER. It is still looking for all the nodes to be available.
> 1. Please can anyone suggest how we can enforce Write Consistency level when using SSTABLELOADER?
> 2. Will Sqoop be a good option in these scenarios? Do we have any performance stats generated
while loading data into Cassandra with Sqoop?
> Environment: 
> Cassandra 1.1.9 provided as part of DSE 3.0
> 3 Nodes
> Replication Factor – 3
> Consistency Level – ANY
> Regards, 
> Praveen
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