This all looks really awesome, while i wish there wasn't as much duplicated
effort across the different projects it's great to see how different teams
are solving this very real problem!
Also Attila we do have our cloud offering as you mentioned, but we also
have our own k8s operator which is
Regardless of
>> content, this e-mail shall not operate to bind DXC Technology Company or
>> any of its affiliates to any order or other contract unless pursuant to
>> explicit written agreement or government initiative expressly permitting
>> the use of e-mail for such purpose. --.
>>
> --
Ben Bromhead
CTO | Instaclustr <https://www.instaclustr.com/>
+1 650 284 9692
Reliability at Scale
Cassandra, Spark, Elasticsearch on AWS, Azure, GCP and Softlayer
he debate is installing Cassandra in Kubernetes cluster.
> Can someone throw some light, what advantages can I get when created
> Cassandra cluster inside Kubernetes cluster. Any comments are highly
> appreciated:)
>
> Thanks and Regards,
> Goutham Reddy Aenugu.
> --
> Regards
&
’t see any cpu spike. is there any thing we have to tune to
> make work with Jmx_exporter?
>
>
> -
> To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org
> For additional commands, e-mail: user-h...
> 2018-05-23 17:17 GMT+02:00 Ben Bromhead <b...@instaclustr.com>:
>
>> The official Kubernetes Java driver is actually pretty feature complete,
>> if not exactly idiomatic Java... it's only missing full examples to get it
>> to GOLD compatibility levels iirc
<
vincent.gromakow...@gmail.com> wrote:
> Why did you choose java for the operator implementation when everybody
> seems to use the go client (probably for greater functionalities) ?
>
> 2018-05-23 15:39 GMT+02:00 Ben Bromhead <b...@instaclustr.com>:
>
>> You can
can be a
> recipe for disaster, especially if you aren't well versed with the
> intricacies of a scale-up/down event. I know use cases where people are
> using Mesos or a custom tool built with terraform/chef etc to run their
> production clusters but have yet to find a real K8s use ca
t 2019 or Cassandra Summit
> 2018 (probably too late)?
>
>
>
> Is there a planning committee?
>
>
>
> Who wants there to be a Cassandra Summit 2019 and who thinks there is a
> better way?
>
>
>
> We could try a Cassandra Distributed Summit 2019 where we meet virtually
> and perhaps asynchronously, but there would be a lot more energy and
> bonding if it’s not virtual. I’m up for any of these.
>
>
>
> Kenneth Brotman
>
>
>
>
>
>
>
>
>
> --
>
>
>
> --
Ben Bromhead
CTO | Instaclustr <https://www.instaclustr.com/>
+1 650 284 9692
Reliability at Scale
Cassandra, Spark, Elasticsearch on AWS, Azure, GCP and Softlayer
; knwledge ds201 and 220 should be enough for cerrification and also i am
> reading definitive guide on cassandra ..any other material required ? Any
> practise test websites? As certification is costly and wanna clear in one
> go ...
>
--
Ben Bromhead
CTO | Instaclustr <https://www
.
>
> Cheers
> Niclas Hedhman
> Member of ASF
>
> On Thu, Apr 12, 2018 at 9:57 PM, Ben Bromhead <b...@instaclustr.com> wrote:
>
>> Folks this is the user list for Apache Cassandra. I would suggest
>> redirecting the question to Datastax the commercial
s email caused more trademark issues
with Datastax.
> Cheers
> Niclas Hedhman
> Member of ASF
>
> On Thu, Apr 12, 2018 at 9:57 PM, Ben Bromhead <b...@instaclustr.com> wrote:
>
>> Folks this is the user list for Apache Cassandra. I would suggest
>>
unctionality that’s seperate from your operations
>>>> functionality I’d build it in it’s own DC. Spark is notorious for causing
>>>> latency spikes in Cassandra which is not great if you are are sensitive to
>>>> that.
>>>>
>>>> Regards,
he Cassandra Consulting
>> http://www.thelastpickle.com
>>
>> 2018-04-04 9:44 GMT+01:00 sujeet jog <sujeet@gmail.com>:
>>
>>> the datastax site has a hardware recommendation of 16CPU / 32G RAM for
>>> DSE Enterprise, Any idea what is the minimum hardware recommendation
>>> supported, can each node be 8CPU and the support covering it ?..
>>>
>>
>>
> --
Ben Bromhead
CTO | Instaclustr <https://www.instaclustr.com/>
+1 650 284 9692
Reliability at Scale
Cassandra, Spark, Elasticsearch on AWS, Azure, GCP and Softlayer
ft support
>>> <https://issues.apache.org/jira/browse/CASSANDRA-5> - Committed
>>> CASSANDRA-10857 dropping compact storage
>>> <https://issues.apache.org/jira/browse/CASSANDRA-10857> - Committed
>>>
>>> To start us off...
>>> And here
e-mail: user-h...@cassandra.apache.org
>>>
>>> --
>>
>>
>> *Ben Slater*
>>
>> *Chief Product Officer <https://www.instaclustr.com/>*
>>
>> <https://www.facebook.com/instaclustr>
>> <https://twitter.com/instaclustr>
>&g
..@cassandra.apache.org
> >>
> >
> >
> > -
> > To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org
> > For additional commands, e-mail: user-h...@cassandra.apache.org
> >
>
> -
> To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org
> For additional commands, e-mail: user-h...@cassandra.apache.org
>
> --
Ben Bromhead
CTO | Instaclustr <https://www.instaclustr.com/>
+1 650 284 9692
Managed Cassandra / Spark on AWS, Azure and Softlayer
;sequential" scan will take 200x more time, equals ~30 minutes.
>
> May be we are totally wrong trying to use Cassandra this way?
>
> --
>
> Best Regards,
>
>
> *Alexander Kotelnikov*
>
> *Team Lead*
>
> DIGINETICA
> Retail Technology Company
>
> m:
say it’s no small effort.
>
> There it is. Fire away with your questions, comments. All I ask is keep it
> respectful because this is a community of amazing people. You have changed
> the world over these years and I know it won’t stop. You know I got a hug
> for you wherever we ju
cies added by DSE?
>
> Or
>
> Has anybody made Java driver version 3.2 work with DSE 5.0 or 5.1?
>
> 4. For AWS, what is prod recommended AMI with CentOS and for DSE 5.x
> versions?
>
> --
Ben Bromhead
CTO | Instaclustr <https://www.instaclustr.com/>
+1 650 284 9692
Managed Cassandra / Spark on AWS, Azure and Softlayer
ctions table
>> not found
>>
>> 2017-05-09 20:45:25,081 [DEBUG] cassandra.metadata: user aggregates table
>> not found
>>
>> 2017-05-09 20:45:25,098 [DEBUG] cassandra.cluster: Control connection
>> created
>>
>> 2017-05-09 20:45:25,099 [DEBUG] cassandra.pool: Initializing connection
>> for host 10.80.10.125
>>
>> 2017-05-09 20:45:25,099 [DEBUG] cassandra.pool: Initializing connection
>> for host 10.80.10.126
>>
>>
>>
>
>
>
> --
> Dikang
>
> --
Ben Bromhead
CTO | Instaclustr <https://www.instaclustr.com/>
+1 650 284 9692
Managed Cassandra / Spark on AWS, Azure and Softlayer
not to implement SOLR directly.
>
> Please suggest on above.
> Thanks.
>
--
Ben Bromhead
CTO | Instaclustr <https://www.instaclustr.com/>
+1 650 284 9692
Managed Cassandra / Spark on AWS, Azure and Softlayer
with SSH+nodetool sessions.
>
> I was wondering if somebody here wants to share his experiences about this
> task, and what do you think about JMX approach instead of the SSH one.
>
> Thank you.
>
> --
> Luigi
> ---
> “The only way to get smarter is by playing a
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:
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
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.
ng keyspace, String user, String password) {
> > if (cluster == null) {
> > builder = Cluster.builder();
> > ...
> > builder = builder.withCredentials(user, password);
> > cluster = builder.build();
> > }
> > session = sessio
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
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
> Apache Cassandra. BigGraphite is leveraging latest features as SASI index &
> Back Pressure.
>
> More info here:
>
> https://github.com/criteo/biggraphite/wiki/BigGraphite-Announcement
> http://labs.criteo.com/blog/
>
> Regards
>
> Duy Hai DOAN
>
--
Ben Bromhe
> 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
y that calls Cassandra's `now()` time
> function may actually cause a query to write or return different times.
>
> Is this the expected or defined behavior, and if so, why does it behave
> like this rather than evaluating `now()` once across an entire statement?
>
> This really affects
, 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
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
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
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
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
&
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
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 <
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
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
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?
>
>
>
>
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
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
>
>
; 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
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
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
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
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
> have received this in error please let the sender know and then delete the
> email and all attachments.
>
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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
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
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
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
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
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
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
>
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
> 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 =
>> 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
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:/
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
--
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*
--
Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr
http
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
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
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?
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Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr
http://twitter.com/instaclustr | (650) 284 9692
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
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
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
, 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
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
with a 6th monitoring server for light to moderate local
testing in 16g of laptop ram. YMMV but it is possible.
--
GPG me!!
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://spinn3r.com
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Ben Bromhead
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information that may be confidential. Unless you are the named
addressee or an authorized designee, you may not copy or use it, or
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://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
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
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Ben Bromhead
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/.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
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)
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
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Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr
http
such a thing exist?
Ken
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Ben Bromhead
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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
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Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr
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) 443-2333
dona...@audiencescience.com
[image: AudienceScience]
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Ben Bromhead
Instaclustr | www.instaclustr.com | @instaclustr
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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
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Ben Bromhead
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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
,
Mohammed
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Ben Bromhead
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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 --
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
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
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
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
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
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
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