Hello!
if we are dealing with append-only data model, so what if I disable
compaction on certain CF ?
any side effect ?
can I do it with
"update column family with compaction_strategy = null " ?
Cheers,
Ilya Shipitsin
Sorry for the confusion created. I need to store emails registered
just for a single application. So although my data model would fit
into just a single row. But is storing a hundred million columns(col
name size= 8 byte; col value size=4 byte ) in a single row a good idea
? I am very much tempted
Quorum is defined as
(replication_factor / 2) + 1
therefore quorum when rf = 2 is 2! so in your case, both nodes must be up.
Really, using Quorum only starts making sense as a 'quorum' when RF=3
On 07/26/2012 10:38 PM, Yan Chunlu wrote:
I am using Cassandra 1.0.2, have a 3 nodes clust
In general I believe wide rows (many cols ) are preferable to skinny rows
(many rows) so that you can get all the information in 1 go,
One can store 2 billion cols in a row.
However, on what basis would you store the 500 email ids in 1 row? What
can be the row key?
For e.g. If the query you want t
I used Cassandra 0.8.1 and pycasa 0.2. If I upgrade pycasa, then it have
compatibility issue. please suggest
Thanks & Regards
*Adeel**Akbar*
On 7/25/2012 10:13 PM, Tyler Hobbs wrote:
That's a pretty old version of pycassa; it was release before 0.7.0
came out. I suggest upgrading.
It's po
I am using Cassandra 1.0.2, have a 3 nodes cluster. the consistency level
of read & write are both QUORUM.
At first the RF=1, and I figured that one node down will cause the cluster
unusable. so I changed RF to 2, and run nodetool repair on every
node(actually I did it twice).
After the operatio
Dne 19.7.2012 15:07, cbert...@libero.it napsal(a):
Hi all, I have a problem with counters I'd like to solve before going in
production.
I have also similar problem with counters, but i do no think that
something can be done with it. Developers are not interested in
discovering what is wrong and
On Wed, Jul 25, 2012 at 6:16 PM, Eran Chinthaka Withana
wrote:
> Alright, lets assume I want to go on this route. I have RF=2 in the data
> center and I believe I need at least RF=3 to set the replication to
> LOCAL_QUORUM and hide the node failures. But if I increase the RF to 3 now
> then won't
What should be the value to create it with Cassandra 1.0.8
Tamar
Sent from my iPod
On Jul 26, 2012, at 7:06 PM, Joaquin Casares wrote:
> Yes, you can easily do this by using the --release switch as found
> here:
> http://www.datastax.com/docs/1.0/install/install_ami
>
> Thanks,
>
> Joaquin
http://www.anuff.com/2011/02/indexing-in-cassandra.html
On Thu, Jul 26, 2012 at 11:43 PM, Brian O'Neill wrote:
> Alon,
>
> We came to the same conclusion regarding secondary indexes, and instead of
> using them we implemented our own wide-row indexing capability and
> open-sourced it.
>
> Its av
Alon,
We came to the same conclusion regarding secondary indexes, and instead of
using them we implemented our own wide-row indexing capability and
open-sourced it.
Its available here:
https://github.com/hmsonline/cassandra-indexing
We still have challenges rebuilding indexes, etc. It doesn't
Hello,
My company is working on transition of our relational data model to
Cassandra. Naturally, one of the basic demands is to have secondary
indexes to answer queries quickly according to the application's
needs.
After looking at Cassandra's native support for secondary indexes, we
decided not to
writes:
>> restoring a counter column family. I have two questions related to
>> this:
>>
>> a) how does that setting affect C* in a non-restoring start?
renew_counter_id regenerates a new "NodeId" for the cassandra VM which
is used to keep track of the counter shards the node holds. If you
I know you specified 1.0.10, but C* 1.1 solves this problem:
http://www.datastax.com/dev/blog/the-schema-management-renaissance
On Thu, Jul 26, 2012 at 7:29 AM, Mateusz Korniak <
mateusz-li...@ant.gliwice.pl> wrote:
> Hi !
> We got into schema disagreement situation on 1.0.10 having 250GB of
> co
On Thu, Jul 26, 2012 at 1:25 AM, Nikolay Kоvshov wrote:
>
> And I have remembered that I do a lot of get_range_slices requests, each
> time on a range of 100, if this could be important.
If you have large rows, try lowering the number of rows you fetch at once
from 100 to 25. Pulling in a larg
On Thu, Jul 26, 2012 at 7:35 AM, Michael Cherkasov <
michael.cherka...@gmail.com> wrote:
> Hi all, if my clusters have PropertyFileSnitch and I'm going to add nee
> node, does that mean that new node must be added to ALL
> cassandra-topology.properties files
>
Yes, unless that node's dc and rack
Yes, you can easily do this by using the --release switch as
found here:
http://www.datastax.com/docs/1.0/install/install_ami
Thanks,
Joaquin Casares
DataStax
Software Engineer/Support
On Thu, Jul 26, 2012 at 12:44 AM, Tamar Fraenkel wrote:
> Hi!
> Is there a way to launch EC2 cluster from D
Hello!
is "upgradesstables" required upon "update column family with
compression_options" (or "compaction_strategy") ?
Cheers,
Ilya Shipitsin
De : mdione@orange.com [mailto:mdione@orange.com]
> restoring a counter column family. I have two questions related to
> this:
>
> a) how does that setting affect C* in a non-restoring start?
>
> b) if it's < bad > (for some value of that), should I stop C*+remove
> the setting+start
According to this post[1], one's supposed to start C* with
-Dcassandra.renew_counter_id=true as one of the steps of
restoring a counter column family. I have two questions related to this:
a) how does that setting affect C* in a non-restoring start?
b) if it's < bad > (for some value of th
Hi Thomas
On a modern 64bit server, I recommend you pay little attention to the virtual
size. It's made up of almost everything within the process's address space,
including on-disk files mmap()ed in for zero-copy access. It's not
unreasonable for a machine with N amount RAM to have a proces
Check out Kundera for Counter column support. Here is the link for Counter
column tests:
https://github.com/impetus-opensource/Kundera/tree/kundera-2.0.7/kundera-cassandra/src/test/java/com/impetus/client/crud/countercolumns
-Vivek
On Thu, Jul 26, 2012 at 12:27 PM, Abhijit Chanda
wrote:
> You
I saw this.
All works fine upto version 1.1.0
the 0.8.x takes 5GB of memory of an 8GB machine
the 1.0.x takes between 6 and 7 GB on a 8GB machine
and
the 1.1.0 takes all
and it is a problem
for me it is no solution to wait of the OOM-Killer from the linux kernel
and restart the cassandraprocess
Hi!
Is there a way to launch EC2 cluster from DataStax latest community AMI
that will run Cassandra 1.0.8 and not 1.1.2?
Thanks
*Tamar Fraenkel *
Senior Software Engineer, TOK Media
[image: Inline image 1]
ta...@tok-media.com
Tel: +972 2 6409736
Mob: +972 54 8356490
Fax: +972 2 5612956
<>
Hi !
We got into schema disagreement situation on 1.0.10 having 250GB of compressed
data per node.
Following
http://wiki.apache.org/cassandra/FAQ#schema_disagreement
after node restart looks like it is replaying all schema changes one be one ,
right ?
As we did a lot of them during cluster life
You can check Astyanax API
https://github.com/Netflix/astyanax/blob/5c05d118e22eef541a7a201adf7c1c610da13f5b/src/test/java/com/netflix/astyanax/thrift/ThrifeKeyspaceImplTest.java
There are some counter column example which will surely help you.
Hi
To create:
ColumnFamilyDefinition counters = createBasicCfDef(
KEYSPACE, Consts.COUNTERS, ComparatorType.UTF8TYPE,
null, "CounterColumnType", "CompositeType(UTF8Type,UUIDType)");
counters.setReplicateOnWrite(true);
cluster.addColumnFamily(counters, true);
to inc
Sun Java 6 didn't help it at all
Sar shows no special activity on the long GC times
And I have remembered that I do a lot of get_range_slices requests, each time
on a range of 100, if this could be important.
Still my GC times are growing incredible
INFO [ScheduledTasks:1] 2012-07-25 12:17:04
Sun Java 6 didn't help it at all
Sar shows no special activity on the long GC times
And I have remembered that I do a lot of get_range_slices requests, each time
on a range of 100, if this could be important.
Still my GC times are growing incredible
INFO [ScheduledTasks:1] 2012-07-25 12:17:04
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