so very interesting !!!
best regards & we rest in contact
Gracias y buen dia
Cordialement
Victor Ibarra
Le lun. 21 janv. 2019 à 15:58, Alain RODRIGUEZ a
écrit :
> Sure, it's called "Cassandra Availability with Virtual Nodes”, by Joey
> Lynch and Josh Snyder.
>
> I fou
away from the default in this case (256 vnodes). I think
> this value is way too high by default.
>
> Also, keep in mind that to change the number of vnodes cannot be changed
> in a running cluster. The best way to change it is to add a new data center
> I think.
>
> C*heers,
&g
Hi Jean Carlo,
thank you for the link !!! I gonna read the ticket
Have a nice day
best regards
Le lun. 21 janv. 2019 à 13:52, Jean Carlo a
écrit :
> Hi Victor,
>
> Take a look to this jira
>
> https://issues.apache.org/jira/browse/CASSANDRA-13701
>
> I may answer your
vnodes.
and the principal question is what about the gain to use 256 vnodes vs 16
vnodes for example
Best regards
--
L'integrité de ce message n'étant pas assurée sur internet, VICTOR IBARRA
ne peut être tenue responsable de son contenu en ce compris les pièces
jointes. Toute util
was able to find so far is to have only trusted
certificates in truststores and do not have CA certificates there at all, but
this will require to change truststores and restart nodes for adding new
certificates.
--
Regards,
Victor Ashik
tus and parses the output, and if it
> sees a node reporting as DN it sends a message to a slack channel. Is it
> possible for a node to report as DN, but not have the message show up in th
> log?
> The system polling nodetool status is not the status that was reported as
> DN.
>
>
Hi Daniel,
In my experience when a node shows DN and then comes back up by itself that
sounds some sort of gc pause (especially if nodtool status when run from
the "DN" node itself shows it is up-- assuming there isn't a spotty network
issue). Perhaps I missed this info due to length of thread but
Arindam,
What can you share regarding the source from which you are importing data?
Is it a separate cassandra cluster? If so, how many nodes and datacenters?
What is RF (replication factor) of source cluster? How certain are you that
the rows indeed exist in the set of sstables which you are load
Along the lines of what Ben and Bryan suggested, what are you using to
verify ports are open? If you do something like:
node1$ nc -zv node2 9042
node2$ nc -zv node1 9042
does it succeed from both nodes?
Does the first node 'know' that it is a seed? i.e. do you have first node
listed in its own se
I have a 12 node cluster in prod using vnodes and C* version 2.18. I have
never used rebuild, and instead prefer bootstrapping new nodes, even if it
means there is additional shuffling of data and cleanup needed on the
initial nodes in each DC, mostly b/c you can tell when bootstrapping is
finished
To elaborate on what Robert said, I think with most things technology
related, the answer with these sorts of questions (i.e. "ideal settings")
is usually "it depends." Remember that technology is a tool that we use to
accomplish something we want. It's just a mechanism that we as humans use
to exe
Yes, you can examine the actual sstables in your cassandra data dir. That
will tell you what version sstables you have on that node.
You can refer to this link:
http://www.bajb.net/2013/03/cassandra-sstable-format-version-numbers/ which
I found via google search phrase "sstable versions" to see wh
s
the need to delete the current row or adding a new one-- you'd simply be
updating (upserting?) by the docId
Regards,
Victor
On Mon, Jul 20, 2015 at 11:59 PM, Robert Wille wrote:
> Data structures that have a recently-modified access pattern seem to be a
> poor fit for Cassandra.
Hi Dave,
Thank you for your answer.
2012/5/25 Dave Brosius
> What version are you using?
>
I am using version 1.1.0
> It might be related to
> https://issues.apache.org/jira/browse/CASSANDRA-4052
>
Indeed the Issue you suggested goes into the direction of my problem.
However, things are a
within process 2 - describe test; - fails with an error (other
query/insert methods fail as well).
I'm not sure if this is indeed a bug or just a misunderstanding from my
part.
Regards,
Victor
If I may ask Sasha, what exactly are you trying to achieve using SolR
(or Solandra, I guess it's about the same) ?
Because from what I understood of your problem you need to do statistics
on your matches, players etc... Or do you just want to retrieve
information that are already been computed ?
a search engine.
Personally for what you are asking I would use Pig and stock that in CF. I
would update those CF regularly. For simple statistics you can generate them
with your favorite language or a specialized language such as R as long as
it concerns small sets.
Hope it helps,
Victor Kabdebon
2011/6
Ok thanks for the update. I thought the query string was translated to
Thrift, then send to a server.
Victor Kabdebon
2011/6/15 Eric Evans
> On Tue, 2011-06-14 at 09:49 -0400, Victor Kabdebon wrote:
> > Actually from what I understood (please correct me if I am wrong) CQL
> &
Hello Markus,
Actually from what I understood (please correct me if I am wrong) CQL is
based on Thrift / Avro.
Victor Kabdebon
2011/6/14 Markus Wiesenbacher | Codefreun.de
>
> Hi,
>
> what is the future API for Cassandra? Thrift, Avro, CQL?
>
> I just released an early
Again I don't really know the specifics of Solandra but in Solr (so Solandra
being a cousin of Solr it should be true too) you have XML fields like this
:
Just turn indexed to false and it's not going to be indexed...
Thrift won't affect Solandra at all.
2011/6/4 Jean-Nicolas Boulay Desjardins
some fields.
Victor Kabdebon
http://www.victorkabdebon.com
2011/6/4 Jean-Nicolas Boulay Desjardins
> Hi,
>
> I am planning to use Cassandra to store my users passwords and at the same
> time data for my website that need to be accessible via search. My Question
> is should I use tw
a for long term storage. Here is an example with Redis :
http://redis.io/commands/append
The "append" command is said to be in O(1) but it is a little bit suspicious
to me...
Best regards,
Victor Kabdebon
http://www.voxnucleus.fr
2011/5/31 Jonathan Ellis
> On Tue, May 31, 2011 at 2:22
me.
Again just experiment and be ready to change your organization if you begin
with Cassandra, this is the best way to figure out what to do for your data
organization.
Victor Kabdebon
http://www.voxnucleus.fr
http://www.victorkabdebon.net
2011/5/24 Jian Fang
> Does anyone have a good sug
Thank you, I will look into that and I will probably wait until there is an
"out of the box" comparator. But it's an excellent new feature !
Regards,
Victor K.
2011/5/5 Eric Evans
> On Thu, 2011-05-05 at 10:49 -0400, Victor Kabdebon wrote:
> > Hello Eric,
> >
>
Hello Eric,
Compound columns seem to be a very interesting feature. Do you have any idea
in which Cassandra version it is going to be introduced : 0.8.X or 0.9.X ?
Thanks,
Victor
2011/5/5 Eric Evans
> On Thu, 2011-05-05 at 18:19 +0800, Guofeng Zhang wrote:
> > I read the CQL v1.0
ite needed. Now I found an
alternative I use : Cassandra (data vault) + Redis (Sessions and other
volatile data) + SolR (Search engine) + PostGreSQL ( for relational
queries).
Best regards,
Victor Kabdebon
http://www.voxnucleus.fr
2011/4/13 Edward Capriolo
> On Wed, Apr 13, 2011 at 10:39 AM, Jea
And about the production 7Gb or RAM is sufficient ? Or 11 Gb is the minimum
?
Thank you for your inputs for the JVM I'll try to tune that
2011/4/4 Peter Schuller
> > You can change VM settings and tweak things like memtable thresholds
> > and in-memory compaction limits to get it down and get a
ode to standard if you want to reduce the overall memory
> usage.
>
> Aaron
>
> On 18 Feb, 2011,at 09:34 AM, Victor Kabdebon
> wrote:
>
> Sorry I forgot to say that this is the partial result of :
> ps aux | grep cassandra
>
> Best regards
>
> 2011/2/17
Sorry I forgot to say that this is the partial result of :
ps aux | grep cassandra
Best regards
2011/2/17 Victor Kabdebon
> Oh right but Cassandra doesn't really respect that, I thought there was
> another option to set that.
>
> Just for your information, I set xms and xm
my result :
105 26115 0.2 27.3 1125328 755316 ? Sl Feb09 23:58
/usr/bin/java -ea -Xms64M -Xmx128M
2011/2/17 Aaron Morton
> bin/cassandra.in.sh
> set Xms and Xmx in the JVM_OPTS
>
> Aaron
>
>
> On 18 Feb, 2011,at 09:10 AM, Victor Kabdebon
> wrote:
>
&
Is it possible to change the maximum JVM heap memory use in 0.6.X ?
2011/2/17 Aaron Morton
> What are you using for disk_access_mode ?
> Have you tried reducing the JVM head size?
> Have you added the Jna.jar file to lib/ ? This will allow Cassandra to lock
> the JVM memory.
>
>
> Aaron
>
>
> On
Thanks robert, and do you know if there is a way to control the maximum
likely number of memtables ? (I'd like to cap it at 2)
2011/2/16 Robert Coli
> On Wed, Feb 16, 2011 at 7:12 AM, Victor Kabdebon
> wrote:
> > Someone please correct me if I am wrong, but I think the
Someone please correct me if I am wrong, but I think the overhead you can
expect is something like :
16* MemTableThroughtPutInMB
but I don't know when BinaryMemTableThroughputInMb come into account..
2011/2/16 ruslan usifov
>
>
> 2011/2/16 Victor Kabdebon
>
>
>>
Yes I didn't see there was 2 different parameters. I was personally setting
( in cassandra 0.6.6 ) MemTableThoughputInMB, but I don't know what
BinaryMemtableThroughtputInMB is.
And I take this opportunity to ask a question :
If you have a small amount of data per key so that your memtable is mayb
Looks like your wish has been granted.
2011/2/15 Chris Goffinet
> I would like to subscribe to your newsletter.
>
> On Tue, Feb 15, 2011 at 8:04 AM, A J wrote:
>
>>
>>
>
t it might give you ideas on how to deal with
that problem (I am not sure that DB are the best way to deal with that...
but it's just my opinion).
Victor Kabdebon
http://www.voxnucleus.fr
2011/2/15 Sasha Dolgy
> thanks for the response. thinking about this, this would not allow fo
Yes i have done a mistake I know ! But I hoped nobody would notice :).
It is the odds of winning 3 days in a row (standard probability fail). Still
it is totally unlikely
Sorry about this mistake,
Best regards,
Victor K.
etting rid of used memory ... I really am puzzled. (by
the way it is not a Amazon EC2 server this is a dedicated server).
Regards,
Victor K.
2011/2/8 Edward Capriolo
> On Tue, Feb 8, 2011 at 4:56 PM, Victor Kabdebon
> wrote:
> > I will do that in the future and I will post my res
non-heap memory on a 0.7 box I have is around 27M. You numbers seem
> large but it would be interesting to know what the JVM is reporting.
>
> Aaron
>
> On 09 Feb, 2011,at 05:57 AM, Victor Kabdebon
> wrote:
>
> Information on the system :
>
> *Debian 5*
> *Jvm :*
>
Information on the system :
*Debian 5*
*Jvm :*
victor@testhost:~/database/apache-cassandra-0.6.6$ java -version
java version "1.6.0_22"
Java(TM) SE Runtime Environment (build 1.6.0_22-b04)
Java HotSpot(TM) 64-Bit Server VM (build 17.1-b03, mixed mode)
*RAM :* 2Go
2011/2/8 Victo
Sorry Jonathan :
So most of these informations were taken using the command :
sudo ps aux | grep cassandra
For the nodetool information it is :
/bin/nodetool --host localhost --port 8081 info
Regars,
Victor K.
2011/2/8 Jonathan Ellis
> I missed the part where you explained where you
.jar:bin/../lib/uuid-3.1.jar
org.apache.cassandra.thrift.CassandraDaemon
It is really an annoying problem if we cannot really foresee memory
consumption.
Best regards,
Victor K
2011/2/8 Victor Kabdebon
> Dear all,
>
> Sorry to come back again to this point but I am really worried about
&g
m ? Bad garbage
collection ? Something that I ignore ?
Thank you for your help I really need to get rid of that problem.
Best regards,
Victor Kabdebon
lottery for 1e11 days in a row ( for 270 million years).
Well if you do have a collision you should play the lottery :).
Best regards,
Victor Kabdebon
http://www.voxnucleus.fr
2011/2/7 Kallin Nagelberg
> Hey,
>
> I am developing a session management system using Cassandra and need
>
ong)
Columns : {
name
other fields
update time (long [date])
...}
CF2 : "ObjectOrder"
Key : "myorderedobjects
Column:{
{ name : identifier that can be sorted
value :ObjectID},
...
}
Best regards,
Victor Kabdebon,
http://www.voxnucleus.fr
2011/2/5 Raj Bakhru
Dear Brendan,
I would really be interested by your findings too. I need a system to store
various documents, I am thinking of Cassandra (that I am already using) or
using a second type of database or any other system. Maybe like dan
suggested, using mogilefs.
Thank you,
Victor Kabdebon
http
Buddasystem is right.
A count returns columns to the client which count it. My advice : do not
count big columns / supercolumns. People in the dev team are trying to
develop distributed counters but I don't know the state of this research.
Best regards,
Victor Kabdebon
http://www.voxnucle
ouble column.
That's what I am doing right now for my applications and making it simpler
and more consistent would be great.
Remember : I don't know the details of the implementation, I take this
principle as if it was perfectly working.
But I am interested in experiences.
gards,
Victor K.
2011/1/16 Peter Schuller
> > bigger and bigger) that cassandra ram memory consumption is going through
> > the roof.
>
> mmap():ed memory will be counted as virtual address space.
>
> Disable mmap() and use standard I/O if you want to see how it behaves
>
Thank you very much,
Best Regards,
Victor Kabdebon
PS : memory consumption :
root 19093 0.1 35.8 *1362108 722312* ? Sl Jan11 14:01
/usr/bin/java -ea -Xms128M -Xmx512M -XX:+UseParNewGC -XX:+UseConcMarkSweepGC
-XX:+CMSParallelRemarkEnabled -XX:SurvivorRatio=8 -XX:MaxTenuringT
Comparator comparates only the column inside a Key.
Key sorting is done by your partitionner.
Best regards,
Victor Kabdebon
2011/1/16 kh jo
> I am having some problems with creating column families and sorting them,
>
> I want to create a countries column family where I can get a so
?
Edward : I am not sure, I will try to see that tomorrow but my disk access
mode is standard, not mmap.
Anyway thank you very much,
Victor K.
PS : here is some hours after the result of ps aux | grep cassandra
root 19093 0.1 30.0 1243940 *605060* ? Sl Jan11 10:15
/usr/bin/java -ea
ory usage...
By the way it's a call to other cassandra users, am I the only one to
encounter this problem ?
Best regards,
Victor K.
2011/1/14 Rajat Chopra
> Hello.
>
>
>
> According to JVM heap size topic at
> http://wiki.apache.org/cassandra/MemtableThresholds , Cassand
Same here Hector + java
Best Regards,
Victor K
2011/1/14 Ran Tavory
> Java
> On Jan 14, 2011 8:25 PM, "Ertio Lew" wrote:
> > what is the technology stack do you use?
> >
> > On 1/14/11, Ran Tavory wrote:
> >> I use Hector, if that counts. ..
>
gosh, sorry for the mistakes I am tired !
Victor K.
2011/1/14 Victor Kabdebon
> I personnally did it the other way around : from Cassandra to PostGreSQL, I
> needed an hybrid system : Cassandra solidly holds all data while PostGreSQL
> holds fewer data but request are simple and
Cassandra and
their hold a lot of data.
Best Regards,
Victor K.
http://www.voxnucleus.fr
2011/1/14 Edward Capriolo
> On Fri, Jan 14, 2011 at 10:40 AM, ruslan usifov
> wrote:
> > Hello
> >
> > Dear community please share your experience, home you make live(without
>
Ok thank you very much for these information !
If somebody has more insights on this matter I am still interested !
Victor K.
2011/1/13 Ryan King
> On Thu, Jan 13, 2011 at 2:44 PM, Victor Kabdebon
> wrote:
> > Is there any recommanded maximum size for a Column ? (not the very upp
Is there any recommanded maximum size for a Column ? (not the very upper
limit which is 2Gb)
Why is it useful to chunk the content into multiple columns ?
Thank you,
Victor K.
2011/1/13 Ryan King
> On Thu, Jan 13, 2011 at 2:38 PM, Victor Kabdebon
> wrote:
> > Dear all,
> &
acks using this method ?
Thank you,
Victor K.
t (a few insert and reads).
Thank you,
Victor
2010/12/19 Peter Schuller
> > vic...@:~$ sudo ps aux | grep "cassandra"
> > cassandra 11034 0.2 22.9 1107772 462764 ? Sl Dec17 6:13
> > /usr/bin/java -ea -Xms128M -Xmx512M -XX:+UseParNewGC
> -
hes,
due to oom errors.
Is there an explanation for this ?
Thank you all,
Victor
2010/12/18 Zhu Han
> Here is a typo, sorry...
>
> best regards,
> hanzhu
>
>
> On Sun, Dec 19, 2010 at 10:29 AM, Zhu Han wrote:
>
>> The problem seems still like the C-heap of JV
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