he problem. Lower the
>> thresholds for those tables if you don't want the commit logs to go crazy.
>>
>> -Jeremiah
>>
>> On 11/28/2011 11:11 AM, Alexandru Dan Sicoe wrote:
>>
>>> Hello everyone,
>>>
>>> 4 node Cassandra 0.8.5 clu
Hi,
I am thinking of strategies to deploy my application that uses a 3 node
Cassandra cluster.
Quick recap: I have several client applications that feed in about 2
million different variables (each representing a different monitoring
value/channel) in Cassandra. The system receives updates for ea
want to store your data on. Use the sstable loader to load the
> sstables from all of the current machines into the new machine. Run major
> compaction a couple times. You will have all of the data on one machine.
>
>
> On 12/07/2011 10:17 AM, Alexandru Dan Sicoe wrote:
>
noc administrator
>
> O: +1 503.553.2554 M: 707.738.8132 TW: @tas50
>
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> *From:* Al
Hello everyone.
3 node Cassandra 0.8.5 cluster. I've left the system running in production
environment for long term testing. I've accumulated about 350GB of data
with RF=2. The machines I used for the tests are older and need to be
replaced. Because of this I need to export the data to a permanen
n Fri, Dec 2, 2011 at 8:35 AM, Alexandru Dan Sicoe <
> sicoe.alexan...@googlemail.com> wrote:
>
>> Ok, so my problem persisted. On the node that is filling up the harddisk,
>> I have a 230 GB disk. Right after I restart the node I it deletes tmp files
>> and reaches 55G
tems are
people using?
Cheers,
Alex
On Thu, Dec 1, 2011 at 10:08 PM, Jahangir Mohammed
wrote:
> Yes, mostly sounds like it. In our case failed repairs were causing
> accumulation of the tmp files.
>
> Thanks,
> Jahangir Mohammed.
>
> On Thu, Dec 1, 2011 at 2:43 PM, Alexandru
deleted at startup. You will then need to run
> repair on that node to get back any data that was missed while it was
> full. If your commit log was on a different device you may not even have
> lost much.
>
> -Jeremiah
>
>
> On 12/01/2011 04:16 AM, Alexandru Dan Sicoe wro
Hello everyone,
4 node Cassandra 0.8.5 cluster with RF =2.
One node started throwing exceptions in its log:
ERROR 10:02:46,837 Fatal exception in thread Thread[FlushWriter:1317,5,main]
java.lang.RuntimeException: java.lang.RuntimeException: Insufficient disk
space to flush 17296 bytes
at
>
> On 11/28/2011 11:11 AM, Alexandru Dan Sicoe wrote:
>
>> Hello everyone,
>>
>> 4 node Cassandra 0.8.5 cluster with RF=2, replica placement strategy =
>> SimpleStartegy, write consistency level = ANY, memtable_flush_after_mins
>> =1440; memtabl
Hello everyone,
4 node Cassandra 0.8.5 cluster with RF=2, replica placement strategy =
SimpleStartegy, write consistency level = ANY, memtable_flush_after_mins
=1440; memtable_operations_in_millions=0.1; memtable_throughput_in_mb = 40;
max_compaction_threshold =32; min_compaction_threshold =4;
I
Hi,
I'm using the community version of OpsCenter to monitor my clutster. At
the moment I'm interested in storage space. In the performance metrics
page, if I choose to see the graph of a the metric "CF: SSTable Size" for a
certain CF of interest, two things are plotted on the graph: Total disk
u
edin.com/skills
> [2] http://www.linkedin.com/in/tjake
>
>
> --
> http://twitter.com/tjake
>
--
Alexandru Dan Sicoe
MEng, CERN Marie Curie ACEOLE Fellow
g
>> but then did some more research and found out that it doesn't make sense to
>> use SSDs for sequential appends because it won't have a performance
>> advantage with respect to rotational media. So I am going to use rotational
>> disk for the commit log and a
use-case.
>
> --
> / Peter Schuller (@scode, http://worldmodscode.wordpress.com)
>
--
Alexandru Dan Sicoe
MEng, CERN Marie Curie ACEOLE Fellow
Hi guys,
It's interesting to see this thread. I recently discovered a similar
problem on my 3 node Cassandra 0.8.5 cluster. It was working fine, then I
took a node down to see how it behaves. All of a sudden I couldn't write or
read because of this exception being thrown:
Exception in thread "mai
Thanks for the detailed answers Dan, what you said makes sense. I think my
biggest worry right now is making the correct preditions of my data storage
space based on the measurements with the current cluster. Other than that I
should be fairly comfortable with the rest of the HW specs.
Thanks for
;> Aaron Morton
>> Freelance Cassandra Developer
>> @aaronmorton
>> http://www.thelastpickle.com
>>
>> On 12/10/2011, at 3:44 AM, Alexandru Dan Sicoe wrote:
>>
>> Hello everyone,
>> I was trying to get some cluster wide stat
Hello everyone,
I was trying to get some cluster wide statistics of the total insertions
performed in my 3 node Cassandra 0.8.6 cluster. So I wrote a nice little
program that gets the CompletedTasks attribute of
org.apache.cassandra.db:type=Commitlog from every node, sums up the values
and records
Hello,
I'm currently doing my masters project. I need to store lots of time series
data of any type (String, int, booleans, arrays of the previous) with a high
writing rate(20MBytes/sec -> 170TBytes/year - note not running continuously)
but less strict read requirements. This is monitoring data fr
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