Hi all!
Our app currently moves from *hibernate* to *cassandra+solr* combination
(we use our own storage abstraction for this). We have a lot of junit
integration tests that use database. Now we've decided to use these tests
to test our *cassandra+solr* storage implementation (given that on *
hibe
> At this moment the errors started, we see that members and other data are
gone, at this moment the nodetool status return (in red color the 3 new
nodes)
> What errors?
The errors was in my side in the application, not cassandra errors
> I put for each of them seeds = A ip, and start each with tw
(we plan on running similar performance tests on cassandra but wanted to
understand the raw foot print first)…..
Someone in ops was doing a test transferring 1T of data from one node to
another. I had a huge concern I emailed him that this could end up being a
completely sequential write not t
I'll skip the prelude, but I worked myself into a bit of a jam. I'm
recovering now, but I want to double check if I'm thinking about things
correct.
Basically, I was in a state where a majority of my servers wanted to do
compactions, and rather large ones. This was impacting my site
performance.
Hi,
Several of my nodes have been compacting system.hints for over 24
hours with no progress, causing high load on otherwise idle nodes.
I'm seeing 30-50 Data.db files in system/hints/
What are the proper compaction settings for the hints CF? Mine are:
compaction={'min_threshold': '0', 'class':
You may want to set compaction threshold and not throughput. If you set
the min threshold to something very large (10), compactions will not
start until cassandra finds this many files to compact (which it should
not).
In the past I have used this to stop compactions on a node, and then run a
I hit some more errors while running repair. Repair starts streaming,
and then hangs. On 2 of the 3 nodes involved in the repair, "nodetool
netstats" show no streams. On the 3rd node there is an error in the
logs and "nodetool netstats" show several streams that appear hung --
no progress in abo
We are trudging through an options analysis for BI/DW solutions for data
stored in C*.
I'd love to hear people's experiences. Here is what we've found so far:
http://brianoneill.blogspot.com/2013/04/bianalytics-on-big-datacassandra.html
Maybe we just use Intravert with a custom handler to handle
Filed
https://issues.apache.org/jira/browse/CASSANDRA-5411
https://issues.apache.org/jira/browse/CASSANDRA-5412
However, I don't think that was our issue as we don't have nodes down for a
long period of time. The longest we had a node down was for a day, and it
was replaced within few hours. I hav
What version are you using ?
There are two tickets with similar issues fixed in 1.2.X releases.
https://issues.apache.org/jira/browse/CASSANDRA-5225
https://issues.apache.org/jira/browse/CASSANDRA-5365
Cheers
-
Aaron Morton
Freelance Cassandra Consultant
New Zealand
@aaronmor
> The problem come from that i don't put auto_boostrap to true for the new
> nodes, not in this documentation
> (http://www.datastax.com/docs/1.2/install/expand_ami)
auto_bootstrap defaults to True if not specified in the yaml.
> can i do that at any time, or when the cluster are not loaded
No
> If not, maybe I just generate the same 1,000,000 files on each machine, then
> randomly delete 1/2 the files and stream them from the other machine as
> writing those files would all be in random locations again forcing a much
> worse measurement of MB/sec I would think.
Not sure I understand
> What are the proper compaction settings for the hints CF? Mine are:
> compaction={'min_threshold': '0', 'class':
> 'SizeTieredCompactionStrategy', 'max_threshold': '0'}
Compaction is run manually by the code when it finishes delivering hints.
> Is hints compaction a common problem? What are s
> Set the min and max
> compaction thresholds for a given column family
+1 for setting the max_compaction_threshold (as well as the min) on the a CF
when you are getting behind. It can limit the size of the compactions and give
things a chance to complete in a reasonable time.
Cheers
> ERROR [Thread-232] 2013-04-01 22:22:21,760 CassandraDaemon.java (line
> 133) Exception in thread Thread[Thread-232,5,main]
> java.lang.IndexOutOfBoundsException: index (2) must be less than size (2)
>at
> com.google.common.base.Preconditions.checkElementIndex(Preconditions.java:305)
>
I have a scheme as follows:
TimeStamp
Device ID
Device Name
Device Owner
Device location
I have created this column family using CQL and defined the primary key as
(TimeStamp,Device ID, Device Name). Through a serializable object that has
fields for DeviceID, name and a field name (which s
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