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From Sylvain Lebresne <sylv...@datastax.com>
Subject Re: Performance problem with large wide row inserts using CQL
Date Thu, 20 Feb 2014 17:12:57 GMT
On Thu, Feb 20, 2014 at 2:16 PM, Edward Capriolo <edlinuxguru@gmail.com>wrote:

> For what it is worth you schema is simple and uses compact storage. Thus
> you really dont need anything in cassandra 2.0 as far as i can tell. You
> might be happier with a stable release like 1.2.something and just hector
> or astyanax. You are really dealing with many issues you should not have to
> just to protoype a simple cassandra app.



Of course, if everyone was using that reasoning, no-one would ever test new
features and report problems/suggest improvement. So thanks to anyone like
Rüdiger that actually tries stuff and take the time to report problems when
they think they encounter one. Keep at it, *you* are the one helping
Cassandra to get better everyday.

And you are also right Rüdiger that it's probably not worth the trouble to
start with thrift if you're gonna use CQL later. And you definitively
should use CQL, it is Cassandra's future.

--
Sylvain



>
> On Thursday, February 20, 2014, Sylvain Lebresne <sylvain@datastax.com>
> wrote:
> >
> >
> >
> > On Wed, Feb 19, 2014 at 9:38 PM, Rüdiger Klaehn <rklaehn@gmail.com>
> wrote:
> >>
> >> I have cloned the cassandra repo, applied the patch, and built it. But
> when I want to run the bechmark I get an exception. See below. I tried with
> a non-managed dependency to
> cassandra-driver-core-2.0.0-rc3-SNAPSHOT-jar-with-dependencies.jar, which I
> compiled from source because I read that that might help. But that did not
> make a difference.
> >>
> >> So currently I don't know how to give the patch a try. Any ideas?
> >>
> >> cheers,
> >>
> >> Rüdiger
> >>
> >> Exception in thread "main" java.lang.IllegalArgumentException:
> replicate_on_write is not a column defined in this metadata
> >>     at
> com.datastax.driver.core.ColumnDefinitions.getAllIdx(ColumnDefinitions.java:273)
> >>     at
> com.datastax.driver.core.ColumnDefinitions.getFirstIdx(ColumnDefinitions.java:279)
> >>     at com.datastax.driver.core.Row.getBool(Row.java:117)
> >>     at
> com.datastax.driver.core.TableMetadata$Options.<init>(TableMetadata.java:474)
> >>     at
> com.datastax.driver.core.TableMetadata.build(TableMetadata.java:107)
> >>     at
> com.datastax.driver.core.Metadata.buildTableMetadata(Metadata.java:128)
> >>     at com.datastax.driver.core.Metadata.rebuildSchema(Metadata.java:89)
> >>     at
> com.datastax.driver.core.ControlConnection.refreshSchema(ControlConnection.java:259)
> >>     at
> com.datastax.driver.core.ControlConnection.tryConnect(ControlConnection.java:214)
> >>     at
> com.datastax.driver.core.ControlConnection.reconnectInternal(ControlConnection.java:161)
> >>     at
> com.datastax.driver.core.ControlConnection.connect(ControlConnection.java:77)
> >>     at com.datastax.driver.core.Cluster$Manager.init(Cluster.java:890)
> >>     at
> com.datastax.driver.core.Cluster$Manager.newSession(Cluster.java:910)
> >>     at
> com.datastax.driver.core.Cluster$Manager.access$200(Cluster.java:806)
> >>     at com.datastax.driver.core.Cluster.connect(Cluster.java:158)
> >>     at
> cassandra.CassandraTestMinimized$delayedInit$body.apply(CassandraTestMinimized.scala:31)
> >>     at scala.Function0$class.apply$mcV$sp(Function0.scala:40)
> >>     at
> scala.runtime.AbstractFunction0.apply$mcV$sp(AbstractFunction0.scala:12)
> >>     at scala.App$$anonfun$main$1.apply(App.scala:71)
> >>     at scala.App$$anonfun$main$1.apply(App.scala:71)
> >>     at scala.collection.immutable.List.foreach(List.scala:318)
> >>     at
> scala.collection.generic.TraversableForwarder$class.foreach(TraversableForwarder.scala:32)
> >>     at scala.App$class.main(App.scala:71)
> >>     at
> cassandra.CassandraTestMinimized$.main(CassandraTestMinimized.scala:5)
> >>     at
> cassandra.CassandraTestMinimized.main(CassandraTestMinimized.scala)
> >
> > I believe you've tried the cassandra trunk branch? trunk is basically
> the future Cassandra 2.1 and the driver is currently unhappy because the
> replicate_on_write option has been removed in that version. I'm supposed to
> have fixed that on the driver 2.0 branch like 2 days ago so maybe you're
> also using a slightly old version of the driver sources in there? Or maybe
> I've screwed up my fix, I'll double check. But anyway, it would be overall
> simpler to test with the cassandra-2.0 branch of Cassandra, with which you
> shouldn't run into that.
> > --
> > Sylvain
>
> --
> Sorry this was sent from mobile. Will do less grammar and spell check than
> usual.
>

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