Rana Aich gmail.com> writes:
>
> Yet my nodetool shows the following:
>
> 192.168.202.202Down 319.94 GB 7200044730783885730400843868815072654
|<--|
> 192.168.202.4 Up 382.39 GB 23719654286404067863958492664769598669
| ^
> 192.168.202.2 Up 106.81 GB 3
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On 27.09.2010, at 19:30, Marc Canaleta wrote:
> What do you mean by "running live"? I am also planning to use cassandra on
> EC2 using small nodes. Small nodes have 1/4 cpu of the large ones, 1/4 cost,
> but I/O is more than 1/4 (amazon does not give explicit I/O numbers.
On Mon, Sep 27, 2010 at 3:48 PM, Alaa Zubaidi wrote:
> RF=2
With RF=2, QUORUM and ALL are the same. Again, your logs show you are
attempting to insert about 180,000 columns/sec. The only way that is
possible with your hardware is if you are using CL.ZERO. The
available information does not ad
RF=2
Each process is processing 75 "rows".
So, do you think that the cause of my problems is the high rate of
inserts I am doing (coupled with the reads)?
taking into consideration that, the first errors were heap overflow and
after I disabled swapping it was stack overflow?
I will try anothe
Does that mean you are doing 600 rows/sec per process or 600/sec total
across all processes?
On Mon, Sep 27, 2010 at 3:14 PM, Alaa Zubaidi wrote:
> Its actually split to 8 different processes that are doing the insertion.
>
> Thanks
>
> On 9/27/2010 2:03 PM, Peter Schuller wrote:
>>
>> [note: i
What is your RF?
On Mon, Sep 27, 2010 at 3:13 PM, Alaa Zubaidi wrote:
> Sorry 3 means QUORUM.
>
>
> On 9/27/2010 2:55 PM, Benjamin Black wrote:
>>
>> On Mon, Sep 27, 2010 at 2:51 PM, Benjamin Black wrote:
>>>
>>> On Mon, Sep 27, 2010 at 12:59 PM, Alaa Zubaidi
>>> wrote:
Thanks for th
I can test the single node on Windows now..
On 9/27/2010 2:02 PM, Jonathan Ellis wrote:
How reproducible is this stack overflow?
If you can reproduce it at will then I would like to see if you can
also reproduce against
(a) a single node Windows machine
(b) a single node Linux machine
On
Its actually split to 8 different processes that are doing the insertion.
Thanks
On 9/27/2010 2:03 PM, Peter Schuller wrote:
[note: i put user@ back on CC but I'm not quoting the source code]
Here is the code I am using (this is only for testing Cassandra it is not
going the be used in produ
Sorry 3 means QUORUM.
On 9/27/2010 2:55 PM, Benjamin Black wrote:
On Mon, Sep 27, 2010 at 2:51 PM, Benjamin Black wrote:
On Mon, Sep 27, 2010 at 12:59 PM, Alaa Zubaidi wrote:
Thanks for the help.
we have 2 drives using basic configurations, commitlog on one drive and data
on another.
and Y
Your ring is wildly unbalanced and you are almost certainly out of I/O
on one or more nodes. You should be monitoring via JMX and common
systems tools to know when you are starting to have issues. It is
going to take you some effort to get out of this situation now.
b
On Mon, Sep 27, 2010 at 2
> We're running a cassandra cluster using 0.6.1 and we need to add a node. Id
> like to add another node with the same version so that I don't have to test a
> mixed version cluster or test (and conduct) a whole-scale upgrade to
> 0.6.5and I'd like to use the debian package to install. Doe
On Mon, Sep 27, 2010 at 2:51 PM, Benjamin Black wrote:
> On Mon, Sep 27, 2010 at 12:59 PM, Alaa Zubaidi wrote:
>> Thanks for the help.
>> we have 2 drives using basic configurations, commitlog on one drive and data
>> on another.
>> and Yes the CL for writes is 3, however, the CL for reads is 1.
Hi Peter,
Thanks for your detailed query...
I have 8 m/c cluster. KVSHIGH1,2,3,4 and KVSLOW1,2,3,4. As the name suggests
KVSLOWs have low diskspace ~ 350GB
Whereas KVSHIGHs have 1.5 terabytes.
Yet my nodetool shows the following:
192.168.202.202Down 319.94 GB
72000447307838857304008438688
On Mon, Sep 27, 2010 at 12:59 PM, Alaa Zubaidi wrote:
> Thanks for the help.
> we have 2 drives using basic configurations, commitlog on one drive and data
> on another.
> and Yes the CL for writes is 3, however, the CL for reads is 1.
>
It is simply not possible that you are inserting at CL.ALL
We're running a cassandra cluster using 0.6.1 and we need to add a node. Id
like to add another node with the same version so that I don't have to test a
mixed version cluster or test (and conduct) a whole-scale upgrade to
0.6.5and I'd like to use the debian package to install. Does anyone
> How can I handle this kind of situation?
In terms of surviving the problem, a re-try on the client side might
help assuming the problem is temporary.
However, certainly the fact that you're seeing an issue to begin with
is interesting, and the way to avoid it would depend on what the
problem i
Hi,
I'm having great difficulty in inserting data in 8 server Cassandra cluster
(RandomPartition with RF 2). For the first one billion the data insertion
was smooth. But slowly I'm getting Unavailable Exception from the cluster.
And now I can't put not more than 30 million data at a one stretch be
[note: i put user@ back on CC but I'm not quoting the source code]
> Here is the code I am using (this is only for testing Cassandra it is not
> going the be used in production) I am new to Java, but I tested this and it
> seems to work fine when running for short amount of time:
If you mean to a
How reproducible is this stack overflow?
If you can reproduce it at will then I would like to see if you can
also reproduce against
(a) a single node Windows machine
(b) a single node Linux machine
On Fri, Sep 24, 2010 at 3:03 PM, Alaa Zubaidi wrote:
> Nothing is working, after disabling swap
> You are saying I am doing 36000 inserts per second, when I am inserting 600
> rows, I thought that every row goes into one Node, so the work is done for a
> row not a column, so my assumption is NOT true, the work is done on a column
> level? so if I reduce the number of columns I will get a "sub
Thanks for the help.
we have 2 drives using basic configurations, commitlog on one drive and
data on another.
and Yes the CL for writes is 3, however, the CL for reads is 1.
You are saying I am doing 36000 inserts per second, when I am inserting
600 rows, I thought that every _row_ goes into
> What do you mean by "running live"? I am also planning to use cassandra on
I believe live as in "in production".
> EC2 using small nodes. Small nodes have 1/4 cpu of the large ones, 1/4 cost,
> but I/O is more than 1/4 (amazon does not give explicit I/O numbers...), so
> I think 4 small instanc
What do you mean by "running live"? I am also planning to use cassandra on
EC2 using small nodes. Small nodes have 1/4 cpu of the large ones, 1/4 cost,
but I/O is more than 1/4 (amazon does not give explicit I/O numbers...), so
I think 4 small instances should perform better than 1 large one (and t
Of course, those slice based on the column name, not value.
So, you may want to consider using the date for the column name instead (in
a more usable form, like "/MM/DD", a timestamp, or a TimeUUID).
Alternatively, use a second ColumnFamily with those dates as column names
and use it as an ind
I strongly recommend not running live on Small nodes. So in your case
I would recommend starting up Large instances with raid0'd disks, shut
down cassandra on the Small ones, rsync to the Large, and start up on
Large.
On Mon, Sep 27, 2010 at 6:46 AM, Utku Can Topçu wrote:
> Hi All,
>
> We're cur
Hi All,
We're currently running a cassandra cluster with Replication Factor 3,
consisting of 4 nodes.
The current situation is:
- The nodes are all identical (AWS small instances)
- Data directory is in the partition (/mnt) which has 150G capacity and each
node has around 90 GB load, so 60 G fre
Commented your questions below.
HTH
- Lucas Nodine
On Mon, Sep 27, 2010 at 7:35 AM, sekhar kosuru wrote:
> Hi Lucas,
>
> Thanks for the reply.
>
> Please clarify me if i am wrong, this kind of filtering will work on Key
> values in ColumnFamily or any other column available in the ColumnFamily.
Hi Lucas,
Thanks for the reply.
Please clarify me if i am wrong, this kind of filtering will work on Key
values in ColumnFamily or any other column available in the ColumnFamily.
One more thing is here we are restricting the out come for 100 records, if
we are not doing also api is resticting fo
Example code using C# below:
Collections.Generic.List results;
SlicePredicate predicate;
ColumnParent cp;
// Create Slice
predicate = new SlicePredicate()
{
Slice_range = new SliceRange()
{
Start = _utf8.GetBytes(""),
Finish = _utf8.GetBytes(""),
Count = 100,
Reversed = false
Have you looked at get_slice or multiget_slice (
http://wiki.apache.org/cassandra/API) to see if those will fit your needs?
I would expect the slice_range property of the SlicePredicate might get you
started.
- Lucas Nodine
On Mon, Sep 27, 2010 at 4:43 AM, sekhar kosuru wrote:
> Hi
>
> I have a
Hi
I have a ColumnFamily with 50k rows, how can i load only say some 2k or so,
Which are satisfied some Criteria on a Single Column Values.
For Example, In the ColumnFamily normal column named CreatedDate, i need to
load the satisfied criteria like this. 1-sep-2009 to 3-july-2010.
/Regards
Sek
http://wiki.apache.org/cassandra/FAQ#iter_world
On Sun, Sep 26, 2010 at 11:51 PM, sekhar kosuru wrote:
> Hi
> I am new to Cassandra Database.
> I want to know how to Retrieve all the records from a column family, is this
> is different in the clustered servers vs single servers.
> Please suggest
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