Instaclustr out.
Cheers
Ben Bromhead
*Instaclustr*
On Fri, Jan 25, 2013 at 12:35 AM, Tim Dunphy bluethu...@gmail.com wrote:
Cool Thanks for the advice Aaron. I actually did get this working before I
read your reply. The trick apparently for me was to use the IP for the
first node in the seeds
Hi Marcelo
A few questions:
Have your added the priam java agent to cassandras JVM argurments (e.g.
-javaagent:$CASS_HOME/lib/priam-cass-extensions-1.1.15.jar) and does the
web container running priam have permissions to write to the cassandra
config directory? Also what do the priam logs say?
why? It's probably what is causing cassandra to die, right?
2013/2/27 Marcelo Elias Del Valle mvall...@gmail.com
Hello Ben, Thanks for the willingness to help,
2013/2/27 Ben Bromhead b...@instaclustr.com
Have your added the priam java agent to cassandras JVM argurments (e.g.
-javaagent
), I am
guessing priam use the data backed up to S3 to restore a node data in another
instance, right?
[]s
2013/2/28 Ben Bromhead b...@relational.io
Off the top of my head I would check to make sure the Autoscaling Group you
created is restricted to a single Availability Zone, also
Check out
http://techblog.netflix.com/2012/07/benchmarking-high-performance-io-with.html
Netflix used Cassandra with SSDs and were able to drop their memcache layer.
Mind you they were not using it purely as an in memory KV store.
Ben
Instaclustr | www.instaclustr.com | @instaclustr
On
Depending on your client, disable automatic client discovery and just specify a
list of all your nodes in your client configuration.
For more details check out
http://xzheng.net/blogs/problem-when-connecting-to-cassandra-with-ruby/ ,
obviously this deals specifically with a ruby client but it
On ubuntu it is: apt-get install cassandra=1.2.4
So should be similar for debian
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr | +61 415 936 359
On 05/07/2013, at 10:59 PM, Kais Ahmed k...@neteck-fr.com wrote:
Hi ben,
You can get it from http://archive.apache.org/dist
(SmartOS is based on Solaris).
Just make sure you test and benchmark all your options, a few days of testing
now will save you weeks of pain.
Good luck!
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr
On 05/08/2013, at 12:34 AM, David Schairer dschai...@humbaba.net wrote:
Of course
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr | +61 415 936 359
On 14/08/2013, at 10:42 AM, Jon Haddad j...@jonhaddad.com wrote:
I strongly recommend against EBS, even with optimized ebs provisioned. The
throughput you'll get from local drives is significantly better than what
to define its dc / rack and it will
use gossip to discover this information about other nodes.
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr | +61 415 936 359
On 10 Dec 2013, at 5:31 am, Marcelo Elias Del Valle marc...@s1mbi0se.com.br
wrote:
Hello everyone,
I have
/apidocs/com/datastax/driver/core/policies/LoadBalancingPolicy.html
… and set the distance based on which zone the node is in.
An alternate method would be to define the zones as data centres and then you
could leverage existing DC aware policies (We've never tried this though).
Ben Bromhead
in
production (after all the warnings), run most of your cluster on linux, then
run a single node or a separate DC with SmartOS, Solaris, BeOS, OS/2, Minix,
Windows 3.1 or whatever it is that you choose and let us know how it all goes!
Cheers
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr
Some imbalance is expected and considered normal:
See http://wiki.apache.org/cassandra/VirtualNodes/Balance
As well as
https://issues.apache.org/jira/browse/CASSANDRA-7032
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr | +61 415 936 359
On 29 Apr 2014, at 7:30 am, DuyHai Doan
will be the way to go
http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPN_CloudHub.html.
Additionally to access your Cassandra instances from your other VPCs you can
use VPC peering (within the same region). See
http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/vpc-peering.html
Ben
the public IPs.
If you run in a VPC without public addressing and want to connect from external
hosts you will want to look at a VPN
(http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_VPN.html).
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr | +61 415 936 359
On 13/05/2014
make range queries slower (the query has more files to visit). See
http://stackoverflow.com/questions/8917882/cassandra-sstables-and-compaction (a
little old but still relevant). Compaction also fixes up things like merging
row fragments (when you write new columns to the same row).
Ben Bromhead
Also once you've got your phi_convict_threshold sorted, if you see these again
check:
http://status.aws.amazon.com/
AWS does occasionally have the odd increased latency issue / outage.
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr | +61 415 936 359
On 19/05/2014, at 1:15 PM
nonetheless.
Datastax OpsCenter also provides capacity planning and forecasting and can
provide an easy set of metrics you can make your scaling decisions on.
http://www.datastax.com/what-we-offer/products-services/datastax-opscenter
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr
-in-cassandra
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr | +61 415 936 359
On 30 May 2014, at 8:40 am, Tupshin Harper tups...@tupshin.com wrote:
When one node or DC is down, coordinator nodes being written through will
notice this fact and store hints (hinted handoff
Java ssl sockets need to be able to build a chain of trust. So having
either a nodes public cert or the root cert in the truststore works (as you
found out).
To get cassandra to use cypher suites 128 bit you will need to install
the JCE unlimited strength jurisdiction policy files. You will know
Cassandra in a VPC solution, but
we haven’t ever used it in a production environment or with a heavy load, so
caveat emptor.
As for the snitch… the GPFS is definitely the most flexible.
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr | +61 415 936 359
On 10 Jun 2014, at 1:42 am
Yes your thinking is correct.
This article from TLP sums it all up beautifully
http://thelastpickle.com/blog/2011/06/13/Down-For-Me.html
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr | +61 415 936 359
On 18 Jun 2014, at 4:18 pm, Prabath Abeysekara prabathabeysek...@gmail.com
.
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr | +61 415 936 359
On 18 Jun 2014, at 7:18 pm, Daniel Chia danc...@coursera.org wrote:
While they guarantee IOPS, they don't really make any guarantees about
latency. Since EBS goes over the network, there's so many things
Nate you are right in that it is a function of logical separation helps for
some reason.
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr | +61 415 936 359
On 20 Jun 2014, at 8:17 am, Nate McCall n...@thelastpickle.com wrote:
Sorry - should have been clear I was speaking
Create a table with a set as one of the columns using cqlsh, populate with a
few records.
Connect using the cassandra-cli, run list on your table/cf and you'll see how
the sets work.
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr | +61 415 936 359
On 13/07/2014, at 11:19 AM
http://www.datastax.com/dev/blog/whats-new-in-cassandra-2-0-prototype-triggers-support
http://www.datastax.com/documentation/cql/3.1/cql/cql_reference/trigger_r.html
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr | +61 415 936 359
On 26 Jul 2014, at 11:32 am, Kevin Burton bur
https://github.com/mstump/cassandra_range_repair
Also very useful.
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr | +61 415 936 359
On 22/08/2014, at 6:12 AM, Robert Coli rc...@eventbrite.com wrote:
On Thu, Aug 21, 2014 at 12:32 PM, Kevin Burton bur...@spinn3r.com wrote
Ah sorry that is the original repo, see
https://github.com/BrianGallew/cassandra_range_repair for the updated version
of the script with vnode support
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr | +61 415 936 359
On 22 Aug 2014, at 2:19 pm, DuyHai Doan doanduy...@gmail.com
Make sure you have also setup the ephemeral drives as a raid device (use mdadm)
and mounted it under /mnt/cassandra otherwise your data dir is the os partition
which is usually very small.
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr | +61 415 936 359
On 27 Aug 2014, at 8:21
as an admin for the cluster isn't. If you do add more hard drives you can
also split out the commit log etc onto different disks.
I would take less problems over trying to draw every last scrap of performance
out of the available hardware any day of the year.
Ben Bromhead
Instaclustr
into different volumes
doesn’t do a whole lot of good on AWS irrespective of whether you are on
spinning disks or SSDs. Simply because the volumes presented to the vm may be
on the same disk.
Just raid the available volumes and be done with it.
Ben Bromhead
Instaclustr | www.instaclustr.com
On 8 Sep 2014, at 12:34 pm, Oleg Dulin oleg.du...@gmail.com wrote:
Another idea I had was taking the ec2-snitch configuration and converting it
into a Property file snitch. But I still don't understand how to perform this
move since I need my newly created VPC instances to have public IPs --
,
Mohammed
--
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr
http://twitter.com/instaclustr | +61 415 936 359
such a thing exist?
Ken
--
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr
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cluster.
What is the best way to deal with this problem? Is there a standard way
to wait for schema changes to propagate?
Best regards,
Clint
--
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr
http://twitter.com/instaclustr | +61 415 936 359
) 443-2333
dona...@audiencescience.com
[image: AudienceScience]
--
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr
http://twitter.com/instaclustr | +61 415 936 359
cassandra runtime.
Ta
Andy
The University of Dundee is a registered Scottish Charity, No: SC015096
The University of Dundee is a registered Scottish Charity, No: SC015096
--
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr
http://twitter.com/instaclustr | +61 415 936
Only recently! Moving off list (c* users bcc'd).
On 30 September 2014 19:20, Andrew Cobley a.e.cob...@dundee.ac.uk wrote:
HI Ben,
yeah, that was it, recovered from the Cassandra summit ?
Andy
On 30 Sep 2014, at 08:19, Ben Bromhead b...@instaclustr.com wrote:
check your cqlshrc
)
at
com.netflix.astyanax.thrift.ThriftSyncConnectionFactoryImpl$ThriftConnection.open(ThriftSyncConnectionFactoryImpl.java:203)
... 6 more
It looks like that my SSL settings are incorrect.
Does anyone know how to resolve this issue?
Thanks
Boying
--
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr
http
/.local/lib/python2.7/site-packages',
'/usr/local/lib/python2.7/site-packages']
Error: No module named cql
I get the same exact error. How on earth do I break out of this feeback
loop?
Thanks!
Tim
--
GPG me!!
gpg --keyserver pool.sks-keyservers.net --recv-keys F186197B
--
Ben
that is difficult to
tackle. Cassandra 2.0Java driver requires google guava 1.6. Unfortuanately,
storm 0.9.2 provides a lower version. Because of that, a topology will not
be able to contact Cassandra databases.
Thanks
Gary
--
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr
://www.datastax.com/dev/blog/anticompaction-in-cassandra-2-1
[2] Or, more sensibly, once a month with gc_grace_seconds set to 34 days.
Thank you for getting back to me so quickly. Not the answer that I was
secretly hoping for, but it is nice to have confirmation. :)
Cheers!
-Tim
--
Ben
://spinn3r.com
--
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr
http://twitter.com/instaclustr | +61 415 936 359
information that may be confidential. Unless you are the named
addressee or an authorized designee, you may not copy or use it, or
disclose it to anyone else. If you received it in error please notify us
immediately and then destroy it
--
Ben Bromhead
Instaclustr | www.instaclustr.com
, but decreases the burden placed on the
nodes, and means you have less impact on reads/writes to the system.*
On 16 March 2015 at 16:33, David Wahler dwah...@indeed.com wrote:
On Mon, Mar 16, 2015 at 6:12 PM, Ben Bromhead b...@instaclustr.com wrote:
Cassandra will by default snapshot your data directory
server, and the space taken up by these deleted files
is growing by several GB per day. For now we can work around the
problem by periodically restarting servers to close the file handles,
but that hurts our availability and seems like a hack.
--
Ben Bromhead
Instaclustr | www.instaclustr.com
wrote:
On Mon, Mar 16, 2015 at 6:51 PM, Ben Bromhead b...@instaclustr.com wrote:
If you are running a sequential repair (or have previously run a
sequential
repair that is still running) Cassandra will still have the file
descriptors
open for files in the snapshot it is using
is not removed from disk, I should
reduce the gc_grace_seconds before the drop operation.
I have to wait for 10 days, but there is not enough disk.
Could you tell me there is method to clear the data from disk quickly?
Thank you very much!
Peter
--
Ben Bromhead
Instaclustr
than the internal C* python driver, but this might be a
question for python-driver folk.
On 28 March 2015 at 00:34, Artur Siekielski a...@vhex.net wrote:
On 03/28/2015 12:13 AM, Ben Bromhead wrote:
One other thing to keep in mind / check is that doing these tests
locally the cassandra driver
with a 6th monitoring server for light to moderate local
testing in 16g of laptop ram. YMMV but it is possible.
--
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gpg --keyserver pool.sks-keyservers.net --recv-keys F186197B
--
GPG me!!
gpg --keyserver pool.sks-keyservers.net --recv-keys F186197B
--
Ben Bromhead
of Cassandra compared to Postgresql is different, but for some
scenarios this difference can matter.
The question is: is it normal for Cassandra to have a minimum latency of
1 millisecond?
I'm using Cassandra 2.1.2, python-driver.
--
Tyler Hobbs
DataStax http://datastax.com/
--
Ben
that allows us to display the
entire tree quickly, as well as see the entire path to a leaf when
selecting that leaf. If anyone has some suggestions/experience on how to
model such a tree heirarchy we would greatly appreciate your input.
--
Ben Bromhead
Instaclustr | www.instaclustr.com
%3Aprimary
Twitter https://twitter.com/tink
--
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr
http://twitter.com/instaclustr | (650) 284 9692
plans to support Java 8 for Cassandra 2.0, now that Java 7
is EOL?
Currently Java 7 is also recommended for 2.1. Are there any reasons not
to recommend Java 8 for 2.1?
Thanks,
Stefan
--
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr
http://twitter.com/instaclustr | (650
please suggest some tool?
--
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr
http://twitter.com/instaclustr | (650) 284 9692
organizations are using this
combination. If you do use DSE + Spark SQL JDBC server, it would be great
if you could share your experience. For example, what kind of issues you
have run into? How is the performance? What reporting tools you are using?
Thank you!
Mohammed
--
Ben
--
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr
http://twitter.com/instaclustr | (650) 284 9692
community.
Regards,
--
Andrés de la Peña
http://www.stratio.com/
Avenida de Europa, 26. Ática 5. 3ª Planta
28224 Pozuelo de Alarcón, Madrid
Tel: +34 91 352 59 42 // *@stratiobd https://twitter.com/StratioBD*
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Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr
http
on cassandra ?
You can get a count of them with :
https://issues.apache.org/jira/browse/CASSANDRA-5084
=Rob
--
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr
http://twitter.com/instaclustr | (650) 284 9692
Austin, TX
@zznate
Co-Founder Sr. Technical Consultant
Apache Cassandra Consulting
http://www.thelastpickle.com
--
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr
http://twitter.com/instaclustr | (650) 284 9692
le_flush_writers as I was
>> writing this--so I'll get on that. Aside from that, I'm not sure what to
>> do. (Thanks, again, for reading.)
>>
>> * They were batched for consistency--I'm hoping to return to using them
>> when I'm back at normal load, which is tiny compared to backloading, but
>> the impact on performance was eye-opening.
>> ___
>> Will Hayworth
>> Developer, Engagement Engine
>> Atlassian
>>
>> My pronoun is "they". <http://pronoun.is/they>
>>
>>
>>
> --
Ben Bromhead
CTO | Instaclustr <https://www.instaclustr.com/>
+1 650 284 9692
Managed Cassandra / Spark on AWS, Azure and Softlayer
=Rob
>> PS - To answer your actual question... one "can" use different snitches
>> on a per node basis, but ONE REALLY REALLY SHOULDN'T CONSIDER THIS A VALID
>> APPROACH AND IF ONE TRIES AND FAILS I WILL POINT AND LAUGH AND NOT HELP
>> THEM :D
>>
>
> --
Ben Bromhead
CTO | Instaclustr
+1 650 284 9692
ght trigger this problem? I'm
> not receiving any exceptions.
>
>
> --
> -Richard L. Burton III
> @rburton
>
--
Ben Bromhead
CTO | Instaclustr
+1 650 284 9692
;>
>>>>>>>>
>>>>>>>> --
>>>>>>>> Jeff Jirsa
>>>>>>>>
>>>>>>>>
>>>>>>>> On Jan 31, 2016, at 9:52 AM, Jack Krupansky <
>>>>>>>> jack.krupan...@gmail.com> wrote:
>>>>>>&g
> update statement (works with 'insert'). Is there a good reason for this, or
>> is it a bug?
>>
>
> The "USING TIMESTAMP" goes in a different place in update statements. It
> should be something like:
>
> UPDATE mytable USING TIMESTAMP ? SET col = ? WHERE key =
and have the unusual property of
> growing larger over time. This is because they are hard links of data files
> and do not take up disk space of their own until the files they link to are
> compacted into new files.
>
> =Rob
>
>
--
Ben Bromhead
CTO | Instaclustr <https:/
>> the relevant cassandra home location folders, change the cassanda.yaml
>>> configuration and restart the node. before starting i will shutdown the
>>> cluster.
>>>
>>
>> Yes.
>>
>> =Rob
>>
>>
>
> --
Ben Bromhead
CTO | Instaclustr <https://www.instaclustr.com/>
+1 650 284 9692
Managed Cassandra / Spark on AWS, Azure and Softlayer
13/08/31/building-the-perfect-cassandra-test-environment/
>
> Has some good discussion of how to run Cassandra in a low memory
> environment. Maybe someone should tell John that his 64MB of JVM heap for a
> test node is 62x too small to be "supported"? :D
>
> =Rob
>
> --
Ben Bromhead
CTO | Instaclustr <https://www.instaclustr.com/>
+1 650 284 9692
Managed Cassandra / Spark on AWS, Azure and Softlayer
gement connections but not for same
> datacenter usage (since the build/up tear down cost is too high for things
> that don't use pools).
>
> Right now it appears if we enable encryption it requires it for all
> connections, which definitely is not what we want.
>
> -J
>
ts for the data it does not own
> (meaning data will never “disappear”) ?
>
>
>
> I’d appreciate some details on this topic from experts !
>
>
>
> Thanks !
>
--
Ben Bromhead
CTO | Instaclustr <https://www.instaclustr.com/>
+1 650 284 9692
Managed Cassandra / Spark on AWS, Azure and Softlayer
n I ask is I am working on a solution for backup / restore and I
> need to be sure if I boot a node, start copying over backed up files then
> those files won’t get overwritten by something coming from other nodes.
>
>
>
> Thanks !
>
> --
Ben Bromhead
CTO | Instaclustr <https://www.instaclustr.com/>
+1 650 284 9692
Managed Cassandra / Spark on AWS, Azure and Softlayer
Note that incremental repair strategies (2.1+) run anti-compaction against
sstables in the range being repaired, so this will prevent overstreaming
based on the ranges in the repair session.
On Mon, 9 May 2016 at 10:31 Ben Bromhead <b...@instaclustr.com> wrote:
> Yup, wi
the application process.
I would not rely on Cassandra auth to authenticate downstream actors, not
because it's bad, just its generally inefficient to create lots of session
objects. The session object maintains a connection pool, pipelines
requests, is thread safe and generally pretty solid.
and is
welcoming of foreign students.
We are also open to sponsoring a PhD project with a more in depth focus for
the right candidate.
For more details please don't hesitate to get in touch with myself or reach
out to i...@instaclustr.com.
Cheers
Ben
--
Ben Bromhead
CTO | Instaclustr <ht
ng keyspace, String user, String password) {
> > if (cluster == null) {
> > builder = Cluster.builder();
> > ...
> > builder = builder.withCredentials(user, password);
> > cluster = builder.build();
> > }
> > session = sessio
not be the most reliable thing to use.
>
>
>
> - John
>
--
Ben Bromhead
CTO | Instaclustr <https://www.instaclustr.com/>
+1 650 284 9692
Managed Cassandra / Spark on AWS, Azure and Softlayer
> So, we aren't sure that the application works when a lot of
> cluster/session objects are created.
> Is it correct?
>
> Thank you,
> Yuji
>
>
>
> On Wed, Feb 8, 2017 at 12:01 PM, Ben Bromhead <b...@instaclustr.com> wrote:
>
> On Tue, 7 Feb 2017 at 17:
3.1/cql/cql_using/update_ks_rf_t.html)?
> or can I live with RF of 3 in each DC (other KS are using 3)
>
> If it has to be equal to the number of nodes then, every time adding or
> removing a node requires update of RF.
>
> Thanks in advance.
>
--
Ben Bromhead
CTO | Instaclustr <ht
eem...@gmail.com> wrote:
> Thanks Ben,
>
> RF 3 isn't sufficient for system_auth? as we are using 3 RF for other
> production KS, do you see any challenges?
>
> On Wed, Jan 18, 2017 at 2:39 PM, Ben Bromhead <b...@instaclustr.com> wrote:
>
> We have a process that syncs a
e upper bound for most clusters? Too high, too low?
>>
>>
>> Thanks,
>>
>> Jerome
>>
> --
>
> Jens Rantil
> Backend Developer @ Tink
>
> Tink AB, Wallingatan 5, 111 60 Stockholm, Sweden
> For urgent matters you can reach me at +46-708-84 18 32.
>
--
Ben Bromhead
CTO | Instaclustr <https://www.instaclustr.com/>
+1 650 284 9692
Managed Cassandra / Spark on AWS, Azure and Softlayer
oo Mail on Android
> <https://overview.mail.yahoo.com/mobile/?.src=Android>
>
> On Thu, 20 Oct, 2016 at 11:25 PM, Ben Bromhead
>
> <b...@instaclustr.com> wrote:
> http://www.datastax.com/dev/blog/preparing-for-the-leap-second gives a
> pretty good overview
>
>
ound that reducing the batch size below 20 also increases the
> writing speed and reduction in memory usage(especially for Python driver).
>
> Kind regards,
> Rajesh R
>
> ------
> *From:* Ben Bromhead [b...@instaclustr.com]
> *Sent:* 07 November 20
Check out https://wiki.apache.org/cassandra/WritePathForUsers for the full
gory details.
On Sun, 6 Nov 2016 at 21:09 Ali Akhtar <ali.rac...@gmail.com> wrote:
> How long does it take for updates to get merged / compacted into the main
> data file?
>
> On Mon, Nov 7, 2016 at 5:3
They can be and it depends on your compaction strategy :)
On Sun, 6 Nov 2016 at 21:24 Ali Akhtar <ali.rac...@gmail.com> wrote:
> tl;dr? I just want to know if updates are bad for performance, and if so,
> for how long.
>
> On Mon, Nov 7, 2016 at 10:23 AM, Ben Bromhead <
6, 2016 at 12:42 PM
> *To: *"user@cassandra.apache.org" <user@cassandra.apache.org>
> *Subject: *Are Cassandra writes are faster than reads?
>
>
>
> Hi all,
>
>
>
> Are Cassandra writes are faster than reads ?? If yes, why is this so? I am
&g
ng question:
>
> How do you handle wrong ordering of multiple writes (on same row and
> column) during the leap second? You may overwrite the new value with old
> one (disaster).
>
> And Downtime is no option :)
>
> I can see that CASSANDRA-9131 is still open..
>
> FYI..we ar
; it seems safe to say it will change. There hasn't been any official
> announcement yet, however.
>
> Kurt Greaves
> k...@instaclustr.com
> www.instaclustr.com
>
>
> --
Ben Bromhead
CTO | Instaclustr <https://www.instaclustr.com/>
+1 650 284 9692
Managed Cassandra / Spark on AWS, Azure and Softlayer
Instaclustr runs in production for Cassandra 3.7
and this is our way of helping the community get a similar level of
stability as what you would get from our managed service.
Cheers
Ben
--
Ben Bromhead
CTO | Instaclustr <https://www.instaclustr.com/>
+1 650 284 9692
Managed Cassandra / Spark
eng) [566347]
{CVE-2010-0623}
Can some who has faced and resolved this issue help us here.
Thanks,
Abhishek
--
Ben Bromhead
CTO | Instaclustr <https://www.instaclustr.com/>
+1 650 284 9692
Managed Cassandra / Spark on AWS, Azure and Softlayer
need to replace multiple hosts in the same rack, is it safe
> to replace them in parallel, using the replace-node command?
>
> Will it cause any data inconsistency if we do so?
>
> Thanks
> Dikang.
>
> --
> Dikang
>
> --
Ben Bromhead
CTO | Instaclustr <ht
, md5
>
> <http://www.apache.org/dist/cassandra/2.1.16/apache-cassandra-2.1.16-bin.tar.gz.md5>
> and sha1
>
> <http://www.apache.org/dist/cassandra/2.1.16/apache-cassandra-2.1.16-bin.tar.gz.sha1>),
>released on 2016-10-10.
>
>
> What would be the best approach to help get this changed?
>
> -Derek
>
--
Ben Bromhead
CTO | Instaclustr <https://www.instaclustr.com/>
+1 650 284 9692
Managed Cassandra / Spark on AWS, Azure and Softlayer
s to all nodes simultaneously? Should I be doing any kind of sorting
> by the partition key?
>
> This is a lot of data, so I figured I'd ask before I pulled the trigger.
> Thanks in advance!
>
>
> --
Ben Bromhead
CTO | Instaclustr <https://www.instaclustr.com/>
+1 650 284 9692
Managed Cassandra / Spark on AWS, Azure and Softlayer
to provide weightage or priority to the nodes in cluster.
>
> Eg., We want more more records to be written to first 2 nodes and less to
> the 3rd node. We are thinking of this approach because we want to install
> other IO intensive messaging server in the 3rd node, in order to reduce the
&
Kai Wang <dep...@gmail.com> wrote:
>
> This is awesome! Stability is the king.
>
> Thank you so much!
>
> On Oct 19, 2016 2:56 PM, "Ben Bromhead" <b...@instaclustr.com> wrote:
>
> Hi All
>
> I am proud to announce we are making available our production b
So, we want to be proactive with things.
>
> I agree that you should avoid such scebaruos with design (if possible).
>
> Good to know that you guys have setup your own NTP servers as per the
> recommendation. Curious..Do you also do some monitoring around NTP?
>
>
>
>
c: batch
> - commitlog_sync_batch_window_in_ms: 2
> (Using default value for the other configurations)
>
>
> Regards,
> Satoshi
>
> --
Ben Bromhead
CTO | Instaclustr <https://www.instaclustr.com/>
+1 650 284 9692
Managed Cassandra / Spark on AWS, Azure and Softlayer
most
> cases, I will increment 1 column by positive integer and the others by 0.
>
> Makes sense ?
>
--
Ben Bromhead
CTO | Instaclustr <https://www.instaclustr.com/>
+1 650 284 9692
Managed Cassandra / Spark on AWS, Azure and Softlayer
to the list of data directories. My
> question, is, will Cassandra use the new disk for compactions on sstables
> that already exist in the primary directory?
>
>
>
>
>
>
>
> Thanks!
>
>
>
>
>
>
>
> CONFIDENTIALITY NOTE: This e-mail and any attachments are confidential and
> may be legally privileged. If you are not the intended recipient, do not
> disclose, copy, distribute, or use this email or any attachments. If you
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>
--
Ben Bromhead
CTO | Instaclustr <https://www.instaclustr.com/>
+1 650 284 9692
Managed Cassandra / Spark on AWS, Azure and Softlayer
d to do some manual copying of files? such as
>
> mv /mnt/path/to/large/sstable.sd /mnt/newebs ?
>
> Thanks!
>
> On Mon, Oct 17, 2016 at 12:59 PM, Ben Bromhead <b...@instaclustr.com>
> wrote:
>
> Yup as everyone has mentioned ephemeral are fine if you run in multiple
> timeuuid spec (or as close to it as we can make it).
>
Maybe formally defined is the wrong term... Formally documented?
>
> On Thu, Dec 1, 2016 at 7:25 AM, Benjamin Roth <benjamin.r...@jaumo.com>
> wrote:
>
> Great comment. +1
>
> Am 01.12.2016 06:29 sch
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