Anyone who's already using Astyanax in production cluster? What C* do you
use with Astyanax ?
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
I am using Astyanax over thrift driver.
On Thu, May 29, 2014 at 7:35 PM, user 01 user...@gmail.com 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
100 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 user...@gmail.com wrote:
With Hector I used to create a column object
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
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 ?
Currently I am using Hector which is no longer maintained by its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
:
On Wed, May 28, 2014 at 7:19 AM, user 01 user...@gmail.com wrote:
2. *What is the future of thrift based APIs *( specifically Astyanax)
?
Logic suggests that the thrift based API will ultimately be removed, at
the time in the future when the cost of working around its moribund area
Can anyone please confirm, whether output.log is completely deprecated now ?
On Mon, Mar 24, 2014 at 6:53 PM, user 01 user...@gmail.com 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 12.04
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 01 wrote:
Which hector version is suitable
Hints please, anyone ?
On Mon, Mar 24, 2014 at 2:13 AM, user 01 user...@gmail.com 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 ?
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 duncan.sa...@gmail.comwrote:
Hi user 01, in older versions
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 ?
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 mich...@pbandjelly.orgwrote:
On 03/11/2014 08:47
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 access
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 user...@gmail.com wrote:
Is it safe to remove (pid file folder)* /var/run/cassandra* if I
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
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 user...@gmail.com wrote:
I installed DSC 2.0.5 on ubuntu 12.04 with Oracle JRE 7 but dsc 2.0.5 does
*
On Mon, Mar 10, 2014 at 7:04 PM, Duncan Sands duncan.sa...@gmail.comwrote:
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..
*$ sudo service cassandra
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
$* 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
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 DSC 2.0.5 not starting - * could not access
pidfile for Cassandra
$* sudo su
@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
-serves-up-free-portion-of-apach/229402129
On 2/23/14, Tupshin Harper tups...@tupshin.com 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, user 01 user
that it writes data which is unused in case I don't use
Opscenter.
On 2/22/14, Michael Shuler mich...@pbandjelly.org 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 authorized to use Opscenter
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 user...@gmail.com wrote:
What is your
directories/files needs to be copied for a remote location backup ?
On Sat, Feb 22, 2014 at 1:12 AM, Robert Coli rc...@eventbrite.com wrote:
On Thu, Feb 20, 2014 at 12:13 PM, user 01 user...@gmail.com wrote:
What is your strategy/tools set to backup your Cassandra nodes, apart
from from cluster
What is your strategy/tools set to backup your Cassandra nodes, apart from
from cluster replication/ snapshots within cluster?
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