I believe you should roll out more nodes as a temporary fix to your problem,
400GB on all nodes means (as correctly mentioned in other mails of this thread)
you are spending more time on GC. Check out the second comment in this link by
Aaron Morton, he says the more than 300GB can be problematic
thanks a lot for the explanation. if I understand it correctly it basically
back pressure from C*, it's telling me that it's overloaded and that I need
to back off.
I better start a few more nodes, I guess.
T#
On Thu, May 30, 2013 at 10:47 PM, Robert Coli wrote:
> On Thu, May 30, 2013 at 8:24
Hi,
I have created a 2 node test cluster in Cassandra version 1.2.3
with Simple Strategy and Replication Factor 2. The Java version is
"1.6.0_27" The seed node is working fine but when I am starting the
second node it is showing the following error:
ERROR 10:16:55,603 Exception in thread
One or more of these might be effective depending on your particular usage
- remove data (rows especially)
- add nodes
- add ram (has limitations)
- reduce bloom filter space used by increasing fp chance
- reduce row and key cache sizes
- increase index sample ratio
- reduce compaction concurrency
Hi Chistophe,
I noticed your email just now. Do you still need some feedback for your
thesis on NoSQL?
Cheers,
Julien
2013/4/8 Christophe Caron
> Hi all,
>
> I'm currently preparing my master's thesis in IT sciences at Itescia
> school and UPMC university in France. This thesis focuses on NoS
StringSerializer and CompositeSerializer are actually from Astyanax for what's
it worth. I would recommend you change your table definition so that only val1
is part of the primary key. There is no reason to include val2. Perhaps
sending the IndexOutOfBoundsException would help.
All the Stri
On Wed, May 29, 2013 at 2:38 PM, Darren Smythe wrote:
> Were using the latest JNA and separate ephemeral drives for commit log and
> data directories.
(as a note..)
Per nickmbailey, testing shows that there is little/no benefit to
separating commit log and data dirs on virtualized disk (or SSD),
You are right, it looks like I am doing a lot of GC. Is there any
short-term solution for this other than bumping up the heap ? because, even
if I increase the heap I will run into the same issue. Only the time before
I hit OOM will be lengthened.
It will be while before we go to latest and greate
On Thu, May 30, 2013 at 8:24 AM, Theo Hultberg wrote:
> I'm using Cassandra 1.2.4 on EC2 (3 x m1.large, this is a test cluster), and
> my application is talking to it over the binary protocol (I'm using JRuby
> and the cql-rb driver). I get this error quite frequently: "Too many in
> flight hints:
Hi Edward... Thanks for the pointer. I will use that going forward.
Daniel Morton
On Thu, May 30, 2013 at 4:09 PM, Edward Capriolo wrote:
> You should probably be using system.nanoTime() not
> system.currentTimeInMillis(). The user is free to set the timestamp to
> whatever they like but nano-
Hi Keith... Thanks for the help.
I'm presently not importing the Hector library (Which is where classes like
CompositeSerializer and StringSerializer come from, yes?), only the
cassandra-all maven artifact. Is the behaviour of the CompositeSerializer
much different than using a Builder from a Com
You should probably be using system.nanoTime() not
system.currentTimeInMillis(). The user is free to set the timestamp to
whatever they like but nano-time is the standard (it is what the cli uses,
and what cql will use)
On Thu, May 30, 2013 at 3:33 PM, Keith Wright wrote:
> Sorry, typo in code
Sorry, typo in code sample, should be:
ssTableWriter.newRow(StringSerializer.get().toByteBuffer("20101201"));
Composite columnComposite = new Composite();
columnComposite.setComponent(0,5,IntegerSerializer.get());
columnComposite.setComponent(1,10,IntegerSerializer.get());
ssTableWriter.addColumn(
You do not want to repeat the first item of your primary key again. If you
recall, in CQL3 a primary key as defined below indicates that the row key is
the first item (key) and then the column names are composites of val1,val2.
Although I don't see why you need val2 as part of the primary key
In thrift an empty ByteBuffer (in some cases an empty string "") can mean
both start and end
Thus:
start: "", end "" is the entire slice
start: "c", end "" start at c inclusive rest of slice
On Thu, May 30, 2013 at 2:37 PM, Kanwar Sangha wrote:
> Hi – We gave a dynamic CF which has a key and
Hi - We gave a dynamic CF which has a key and multiple columns which get added
dynamically. For example -
Key_1 , Column1, Column2, Column3,...
Key_2 , Column1, Column2, Column3,.
Now I want to get all columns after Column3...how do we query that ? The
ColumnSliceIterator in hector al
Hi,
we had some hard-disk issues this week, which caused some datafiles to get
corrupt, which was reported by the compaction. My approach to fix this was
to delete the corrupted files and run repair. That sounded easy at first,
but unfortunetaly C* 1.1.11 sometimes does not show which datafile is
Hi Tyler... Thank you very much for the response. It is nice to know that
there is some possibility this might work. :)
Regards,
Daniel Morton
On Wed, May 29, 2013 at 2:03 PM, Tyler Hobbs wrote:
> You can get away with a 1 to 2GB heap if you don't put too much pressure
> on it. I commonly
Hi All. I am trying to bulk load some data into a CQL3 table using the
sstableloader utility and I am having some difficulty figuring out how to
use the SSTableSimpleUnsortedWriter with composite columns.
I have created this simple contrived table for testing:
create table test (key varchar, val
Hi,
I'm using Cassandra 1.2.4 on EC2 (3 x m1.large, this is a test cluster),
and my application is talking to it over the binary protocol (I'm using
JRuby and the cql-rb driver). I get this error quite frequently: "Too many
in flight hints: 2411" (the exact number varies)
Has anyone any idea of w
> I have a slow query that is making me think I don't understand the data
model for
> time series:
> select asset, returns from marketData where date >= 20130101 and date <=
20130110
> allow filtering;
>
> create table marketData {
> asset varchar,
> returns double,
> date timestamp,
> PRIMARY KEY(
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