Anyone who's already using Astyanax in production cluster? What C* do you
use with Astyanax ?
What version of Astyanax(thrift based impl. or beta Java driver one?) are
you using ?
With what cassandra version ?
Would you still recommend Astyanax at this point when DS Java Driver is
out?
My intentions are to use Astyanax over thrift based impl for now, & later
switch to Astyanax over Java dr
00 times" --> is it really an issue ? Even if Astyanax creates 1
> millions of column objects, as long as they die young and respect the
> generational hypothesis of the JVM, it's fine.
>
>
> On Thu, May 29, 2014 at 4:05 PM, user 01 wrote:
>
>> With Hecto
I am using Astyanax over thrift driver.
On Thu, May 29, 2014 at 7:35 PM, user 01 wrote:
> With Hector I used to create a column object once & add that to multiple
> row mutations but with Astyanax it creates a new column object for each row
> mutation in a mutation batch so if I
With Hector I used to create a column object once & add that to multiple
row mutations but with Astyanax it creates a new column object for each row
mutation in a mutation batch so if I need to add a same column to 1000
rows, it creates the column object 100 times. Isn't there a better way to
add s
why things like
> LINQ came into existence.
>
>
>
> On Wed, May 28, 2014 at 2:44 PM, Robert Coli wrote:
>
>> On Wed, May 28, 2014 at 7:19 AM, user 01 wrote:
>>
>>> 2. *What is the future of thrift based APIs *(& specifically Astyanax)
>>> ?
>
Currently I am using Hector which is no longer maintained by its
developers. So, for the past few days I have been looking at Astyanax & to
be fair, I think I'm just loving its API.
For sometime now I also had a look at CQL Java driver maintained by
Datastax but right now, I don't very much love/u
What are the advantages of static column family over a dynamic column
family? Otherwise why shouldn't I just make all my column families just
dynamic for the reasons of ease?
Do static column families save diskspace or offer better reads/writes
performance ?
Can anyone please confirm, whether output.log is completely deprecated now ?
On Mon, Mar 24, 2014 at 6:53 PM, user 01 wrote:
>
> *@Jonathan Lacefield, *
> Yes I am seeing the logs in system.log. I installed cassandra 2.0.6 using
> latest Datastax Community package on Ubuntu 1
ich the only one who supports C* v2. Also you can use Astyanax
> in order to switch to its API but having something like DS JavaDriver under
> the hood.
> It may be interesting for you http://techblog.netflix.com/
> 2013/12/astyanax-update.html
>
>
> On 03/27/2014 11:17 AM, user
Which hector version is suitable for cassandra 2.0.6 ?
I am seeing that version 1.1-4(which I believe is latest release?) has been
there around since very long time even before C* 2.x.x series wasn't out.
So is it the latest release suitable for 2.0 series?
Is Hector under active development now
output.log supposed to contain? Is it
completely a deprecated now ? I am surprised why does this page exists :
http://www.datastax.com/documentation/cassandra/2.0/cassandra/configuration/configOutputLog_t.html
On Mon, Mar 24, 2014 at 6:27 PM, Duncan Sands wrote:
> Hi user 01, in older versions of
Hints please, anyone ?
On Mon, Mar 24, 2014 at 2:13 AM, user 01 wrote:
> No output.log is ever generated by my cassandra installation(DSC20 with C*
> 2.0.6 on Ubuntu 12.04). Do I need to configure anything to enable logs to
> output.log ?
>
While installing Datastax community Cassandra I got the error:
*error: permission denied on key 'vm.max_map_count'*
>
Because I 'm running cassandra in an OpenVZ container my host does not
allow changing *vm.swapiness* or *vm.max_map_count* due to shared kernel.
Is it OK to ignore these errors ?
No output.log is ever generated by my cassandra installation(DSC20 with C*
2.0.6 on Ubuntu 12.04). Do I need to configure anything to enable logs to
output.log ?
I've verified that problem is solvable by deleting *
/var/run/cassandra*folder on my test server. Should I remove the pid
folder from my new
production server ?
On Wed, Mar 19, 2014 at 10:54 AM, user 01 wrote:
> Is it safe to remove (pid file folder)* /var/run/cassandra* if I think
Is it safe to remove (pid file folder)* /var/run/cassandra* if I think it
has got wrong permissions, will it be recreated by process as before ?
folder permissions seem to be incorrect immediately after I installed
dsc20 & due to this "sudo service cassandra start" fails saying - "*
could not acc
For others who get stuck with this in future, here is fix that worked for
me:
http://askubuntu.com/questions/435749/cant-start-an-application-as-service-but-running-as-standalone-process-simply
On Tue, Mar 11, 2014 at 9:24 PM, Michael Shuler wrote:
> On 03/11/2014 08:47 AM, Ken Hancock wrote:
>
>
>
> On 03/10/2014 12:50 PM, Sholes, Joshua wrote:
>
>> Depending on how it was installed, try making sure that the cassandra
>> user has an actual login shell defined in /etc/passwd and not something
>> like /sbin/nologin or /bin/false.
>>
>>
>> From: us
@Sholes, Joshua: It was installed using Datastax DSC20 package for
cassandra 2.0.5.
Checked out * /etc/passwd . *An entry for cassandra user does seem to
exist. Looks like this:
*cassandra:x:107:113:Cassandra database,,,:/var/lib/cassandra:/bin/false*
On Mon, Mar 10, 2014 at 11:21 PM, user 01
> You may need to do "chown -R cassandra /var/lib/cassandra
> /var/log/cassandra" .
>
>
>
> Don
>
>
>
> *From:* user 01 [mailto:user...@gmail.com]
> *Sent:* Monday, March 10, 2014 10:23 AM
> *To:* user@cassandra.apache.org
> *Subject:* Re: Cassandra
>
> $* sudo su - cassandra*
I don't know why but this isn't actually working. It does not switch me to
*cassandra* user[btw .. should this actually switch me to cassandra user??
]. This user switching on my servers does not work for users like
*tomcat7*user,
*cassandra* user but works for users t
When running as root everything works fine, however when I run your
commands a normal user, here is what happens..
> user01@server1:~$
> *sudo -iu cassandra*
user01@server1:~$
> * cassandra -f -p /var/run/cassandra/cassandra.pid*
*...*
ERROR 16:46:09,355 Exception encountered during startup
*
On Mon, Mar 10, 2014 at 7:04 PM, Duncan Sands wrote:
> Hi user 01,
>
>
> On 10/03/14 13:11, user 01 wrote:
>
>> I installed DSC 2.0.5 on ubuntu 12.04 with Oracle JRE 7 but dsc 2.0.5
>> does not
>> start after installation. When I check the running status..
>>
If it was not very clear, I could not manually start cassandra
*$ sudo service cassandra start*
** could not access pidfile for Cassandra*
On Mon, Mar 10, 2014 at 5:41 PM, user 01 wrote:
> I installed DSC 2.0.5 on ubuntu 12.04 with Oracle JRE 7 but dsc 2.0.5 does
> not start
I installed DSC 2.0.5 on ubuntu 12.04 with Oracle JRE 7 but dsc 2.0.5 does
not start after installation. When I check the running status..
*$ sudo service cassandra status*
it says
> ** could not access pidfile for Cassandra*
& no other messages or anything in logs.
This is happening with 2.
s/datastax-serves-up-free-portion-of-apach/229402129
On 2/23/14, Tupshin Harper wrote:
> You can use OpsCenter in production with DSC/Apache Cassandra clusters.
> Some features are only enabled with DSE, but the rest work fine with DSC.
>
> -Tupshin
> On Feb 22, 2014 11:20 PM, "us
e no sense that it writes data which is unused in case I don't use
Opscenter.
On 2/22/14, Michael Shuler wrote:
> On 02/22/2014 06:12 AM, user 01 wrote:
>> I'm using dsc20 (datastax community edition for cassandra 2.0) in
>> production environment. But since I am not author
I'm using dsc20 (datastax community edition for cassandra 2.0) in
production environment. But since I am not authorized to use Opscenter for
production use. So how do I disable the data recording that is being done
for opscenter consumption, as this is just a unusable for me & will put
unnecessary
emote location, isn't it ?
What directories/files needs to be copied for a remote location backup ?
On Sat, Feb 22, 2014 at 1:12 AM, Robert Coli wrote:
> On Thu, Feb 20, 2014 at 12:13 PM, user 01 wrote:
>
>> What is your strategy/tools set to backup your Cassandra nodes, apart
&
I'm wanting to back up my data to amazon S3. Can anyone please tell about
which directories should I copy to the remote location for backup so as to
restore the entire Cassandra data in the event of any failures?
On Fri, Feb 21, 2014 at 1:43 AM, user 01 wrote:
> What is your strategy/t
What is your strategy/tools set to backup your Cassandra nodes, apart from
from cluster replication/ snapshots within cluster?
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