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https://issues.apache.org/jira/browse/CASSANDRA-7463?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14185028#comment-14185028
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Benjamin Lerer edited comment on CASSANDRA-7463 at 10/27/14 10:23 AM:
----------------------------------------------------------------------
Only one nit:
In {{AbstractSSTableSimpleWriter.makeFilename}} I think that
{code}int maxGen = generation.getAndIncrement();
for (Descriptor desc : existing)
{
while (desc.generation > maxGen)
{
if (!generation.compareAndSet(maxGen, desc.generation + 1))
{
maxGen = generation.getAndIncrement();
}
else
{
maxGen = desc.generation;
}
}
maxGen = Math.max(maxGen, desc.generation);
}{code}
could be replaced by
{code}int maxGen = generation.getAndIncrement();
for (Descriptor desc : existing)
{
while (desc.generation > maxGen)
{
maxGen = generation.getAndIncrement();
}
}{code}
was (Author: blerer):
Only one nit:
In {{AbstractSSTableSimpleWriter.makeFilename} I think that
{code}int maxGen = generation.getAndIncrement();
for (Descriptor desc : existing)
{
while (desc.generation > maxGen)
{
maxGen = generation.getAndIncrement();
}
}{code} could be replaced by
> Update CQLSSTableWriter to allow parallel writing of SSTables on the same
> table within the same JVM
> ---------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-7463
> URL: https://issues.apache.org/jira/browse/CASSANDRA-7463
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Johnny Miller
> Assignee: Carl Yeksigian
> Fix For: 2.0.12
>
> Attachments: 7463-v2.txt, 7463.patch
>
>
> Currently it is not possible to programatically write multiple SSTables for
> the same table in parallel using the CQLSSTableWriter. This is quite a
> limitation and the workaround of attempting to do this in a separate JVM is
> not a great solution.
> See:
> http://stackoverflow.com/questions/24396902/using-cqlsstablewriter-concurrently
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