s a Cassandra cluster. This was a personal reason why I chose
>> Cassandra instead of HBase for a project.
>>
>> Cheers,
>> Jens
>>
>> Den ons 29 juni 2016 13:01jean paul skrev:
>>
>>>
>>>
>>> 2016-06-28 22:29 GMT+01:00 jean pau
n, Dec 18, 2016 at 7:47 PM, jean paul wrote:
>
>> Hi,
>>
>> Please, if we choose a replication factor =2 (simple strategy), so, we
>> have two replicas of data on the ring.
>>
>> What happen in the case of all nodes containing replicas are down ?
>>
>>
>> Thank you so much for help.
>>
>> Kind regards.
>>
>
>
Hi,
Please, if we choose a replication factor =2 (simple strategy), so, we have
two replicas of data on the ring.
What happen in the case of all nodes containing replicas are down ?
Thank you so much for help.
Kind regards.
t;
>
> One of the sub-tickets there is https://issues.apache.org/
> jira/browse/CASSANDRA-12347
>
>
>
> That ticket links to a relevant paper on the subject (and an alternative
> to the existing approach): http://www.gsd.inesc-id.pt/~
> jleitao/pdf/srds10-mario.pdf
>
&
Hi,
The distributed replicas take space. Is there a scenario when a new
replicas cannot be stored on a node due to lack of space? If we choose a
replication factor =3, and we can find a space for the third replicas, how
cassandra treats this case. Please, where can i find the algorithm ?
Thank
Hi all;
Please is there a scientific study that evaluates the scalability of Gossip
protocol ?
Thank you so much for help
Kind regards.
seconds (using gossip protocol), it's therefore
marked 'DN: down' ?
That's it?
2016-08-11 13:51 GMT+01:00 Romain Hardouin :
> Hi Jean Paul,
>
> Yes, the gossiper is used. Example with down nodes:
> 1. The status command retrieve unreachable nodes from a
Hi all,
*$nodetool status*Datacenter: datacenter1
===
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
-- AddressLoad Tokens Owns (effective) Host
ID Rack
*UN 127.0.0.1 83.05 KB 256 100.0%
460ddcd9-1ee8-48b8-a618-c0760
As i find in cassandra Documentation, the gossip process runs every second.
Please, why you have chosen 'running it *every second'* ?
Thanks a lot.
2016-07-25 13:12 GMT+01:00 jean paul :
> Hi all;
>
> I have used Apache Cassandra version 2.1.6 for my experiments.
>
> P
Hi all;
I have used Apache Cassandra version 2.1.6 for my experiments.
Please, what is the gossip delay or threshold ? The gossip process is
running every . seconds ?
Thank you so much for help.
Kind regards.
2016-06-28 22:29 GMT+01:00 jean paul :
> Hi all,
>
> Please, What is the motivation for choosing a DHT ring in cassandra? Why
> not use a normal parallel or distributed file system that supports
> replication?
>
> Thank you so much for clarification.
>
> Kind regards.
>
Hi all,
Please, What is the motivation for choosing a DHT ring in cassandra? Why
not use a normal parallel or distributed file system that supports
replication?
Thank you so much for clarification.
Kind regards.
> storing the filenames, not the actual contents of the files).
>
> On Fri, Mar 20, 2015 at 8:54 PM, Ali Akhtar wrote:
>
>> It has been decided that the file cannot be allowed to be stored, sorry.
>> However, if a sacrifice to the gods is prepared, it may be possible to
>>
>
> Please, can you explain details in this two links:
>
> https://wiki.apache.org/cassandra/FAQ#large_file_and_blob_storage
>
http://stackoverflow.com/questions/9219222/how-to-store-small-files-in-cassandra
r wrote:
>
>> It has been decided that the file cannot be allowed to be stored, sorry.
>> However, if a sacrifice to the gods is prepared, it may be possible to
>> change things.
>>
>> On Fri, Mar 20, 2015 at 8:49 PM, jean paul
>> wrote:
>>
>>> i&#x
nally be vetted by the cassandra
> community. Only if they're found to not contain anything inappropriate,
> does cassandra let you store them. (A 3/4 majority vote is necessary).
>
> Please send your files for approval to j...@reallycereal.com
>
> On Fri, Mar 20, 20
ot manage files, it manages data in a highly distributed
> cluster. If you are attempting to manage files, you are quite simply using
> the wrong tool and Cassandra is not for you.
>
> On Fri, Mar 20, 2015 at 9:10 AM, jean paul wrote:
>
>> I have used this tutoriel
/demo/users# ls
:/var/lib/cassandra/data/demo/users#
i find nothing in /var/lib/cassandra/data/demo/users!
2015-03-20 13:06 GMT+01:00 jean paul :
> Hello All;
> Please,
> i have created this table.
>
> lastname | age | city | email
Hello All;
Please,
i have created this table.
lastname | age | city | email | firstname
--+-+---+-+---
Doe | 36 | Beverly Hills | jane...@email.com | Jane Byrne | 24
| San Diego | robby...@email.com |
Hello All,
Please,i have a question a bout the seed node.. as i read it is the
bootstrap node, each new node joins the seed node that's it?
if it leaves the cluster, how can a new node joins the rest of the group ?
Thanks a lot for answer.
Best Regards.
Hello,
Finally, i have created my ring using cassandra.
Please, i'd like to store a file replicated 2 times in my cluster.
is that possible ? can you please send me a link for a tutorial ?
Thanks a lot.
Best Regards.
In my case,i have:
UN *127.0.0.1* 83.05 KB 256 100.0%
460ddcd9-1ee8-48b8-a618-c076056aad07 rack1
i'd like to change the ip address like:
UN *192.168.1.4*
so i have to modify the file cassandra.yam
# Setting this to 0.0.0.0 is always wrong.
*listen_address: localhost*
-->
*listen_ad
with links that describe the
> installation process. I would suggest reading those links.
>
> On Tue, Mar 17, 2015 at 3:42 PM, jean paul wrote:
>
>> Hello All,
>>
>> I launched the script (./cassandra-install.sh) without making any changes
>> and it works.
>&
Hello All,
I launched the script (./cassandra-install.sh) without making any changes
and it works.
Then:
*First Terminal:*
$cassandra
...
INFO 10:52:26,655 Node /127.0.0.1 state jump to normal
INFO 10:52:26,791 Starting listening for CQL clients on
localhost/127.0.0.1:9042...
ou please
> elaborate a bit more on the problem you are trying to solve. Would nodetool
> status help (
> http://www.datastax.com/documentation/cassandra/2.0/cassandra/tools/toolsStatus.html
> )
>
> Not sure why you trying to dig into the code?
>
> Cheers,
> Akhil
>
156cbb
>>>
>>> Best run from a fresh ubuntu server.
>>>
>>> On Tue, Mar 17, 2015 at 12:50 AM, jean paul
>>> wrote:
>>>
>>>> i find this solution:
>>>>
>>>> http://www.liquidweb.com/kb/error-failed-to-connect-to-
d the paquet et used the command inside the bin directory! that's
it ?
i can't find a file install.sh for example...
2015-03-16 20:11 GMT+01:00 jean paul :
> i can test './cqlsh' command but not with nodetool !
>
> /Bureau/apache-cassandra-2.0.13/bin# ./cqlsh
> Connec
he-cassandra-2.0.13/bin# .
*/nodetool infoFailed to connect to '127.0.0.1:7199
<http://127.0.0.1:7199>': Connexion refusée*
2015-03-16 19:50 GMT+01:00 jean paul :
> ./nodetool help gossipinfo
> NAME
> nodetool gossipinfo - Shows the gossip information for the
restart
cassandra ...
2015-03-16 18:59 GMT+01:00 jean paul :
> I have done the same test again but i have errors with the two versions
> 2.1.3 and 2.0.13
>
> :~/Bureau/apache-cassandra-*2.1.3*/bin$ ./cassandra -f
> CompilerOracle: inline
> org/apache/cassandra/db/AbstractNa
./nodetool help gossipinfo
NAME
nodetool gossipinfo - Shows the gossip information for the cluster
SYNOPSIS
nodetool [(-h | --host )] [(-p | --port )]
[(-pw | --password )]
[(-pwf | --password-file
)]
[(-u | --username )] gossipi
t
> for a new Cassandra release.
>
> On Mon, Mar 16, 2015 at 10:34 AM, jean paul
> wrote:
>
>> OK.
>> I have tens of nodes in my cluster. i'd like to get the states of these
>> nodes(alive, not etc ..). (it is just a first step to test cassandra)
>> So, i
and 2.1.4 is under development.
>
> This is all listed on http://cassandra.apache.org/download/ and this
> question may be best suited for the user mailing list :)
>
> --
> Michael
>
> On 03/16/2015 11:34 AM, jean paul wrote:
>
>> Hello,
>>
>> Please, i have a
Hello,
Please, i have a cluster of 10 nodes, so i have to download the last
version of cassandra and install it on each node, that's it ?
Thanks a lot.
Best Regards.
2015-03-16 16:39 GMT+01:00 Jake Luciani :
> Apache Cassandra is a fully distributed database. It is the right choice
> when you
this helps.
>
> Cheers,
> Akhil
>
>
> On 16/03/2015, at 10:43 am, jean paul wrote:
>
> Ok i will read all documents :) thanks a lot for help :)
> Please, can i you send me some details (url of source code) about the
> implementation of gossip protocol used in cassandra
http://www.datastax.com/resources/tutorials
>
> I hope this helps.
>
> Cheers,
> Akhil
>
> On 16/03/2015, at 8:13 am, jean paul wrote:
>
> Hello All,
>
> Please, i'm newer with cassandra Apache. i'm sooo interested. i know some
> details about its archite
Hello All,
Please, i'm newer with cassandra Apache. i'm sooo interested. i know some
details about its architecture, some details also about gossip protocol.
I'd like to test it, to more understand :) i ask if there is a howto
tutorial that can help me ?
Thanks a lot for help.
Best Regards.
imitations of 2 billions cells per partitioner,
will the CF limited to 2 billions entries?
Thanks!
note: my english is not so good, feel free to ask me questions if needed
--
-----
Jean Paul Adant - Créative-Ingénierie
jean.paul.ad...@gmail.com
Hi,
I did have the same problem with cassandra 1.1.1 on Ubuntu 11.10
I had to reboot all nodes
I'm interested in any information about this.
Thanks
Jean Paul
2012/7/2 Filippo Diotalevi
> Hi,
> we had some really weird issues during the weekend, with our cassandra
> nodes start
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