Huge milestone!
Congratulations to everyone involved!
Cheers
Ben
From: Mick Semb Wever
Sent: 06 September 2024 07:28
To: user@cassandra.apache.org ; dev
Subject: [RELEASE] Apache Cassandra 5.0.0 GA released
EXTERNAL EMAIL - USE CAUTION when clicking links
certainly seen that be succesful. However, a really good recommendation
probably requires a bit more understand of just what kind of issues you’re
worried about with Kafka.
Cheers
Ben
From: Bowen Song via user
Date: Saturday, 17 February 2024 at 23:40
To: user@cassandra.apache.org
Cc: Bowen Song
0.9 was never a seed before.
Based on your comment, I also tried, from having all three nodes up
(following the initial bootstrap), restarting 0.7. This failed with the
same error.
On 2022/11/09 15:37:24 Jeff Jirsa wrote:
> When you say you configured them to talk to .0.31 as a seed, did you
Hi
Our LDAP Authenticator for Cassandra is open source, Apache 2.0 licenced and
free to use: https://github.com/instaclustr/cassandra-ldap
We do offer support for it as part of our Cassandra support contracts but you
don’t need to buy support to use it.
Cheers
Ben
--
Ben Slater
Chief
Thanks a lot. We are working on removing views and control the partition
size. I hope the improvements help us
Best regards
Gb
Erick Ramirez 于2020年4月16日周四 下午2:08写道：
> GC collector is G1. I ever repair the node after scale up. The JVM issue
>> reproduced. Can I increase the heap to 40 GB on
Thanks a lot for your sharing.
The node is added recently. The bootstrap failed since too many tombstone.
So we enabled the node without bootstrap enabled. Some sstables are not
created in bootstrap. So the missing files might be numerous. I have set
the repair thread number is 1. should I als
Hello experts
I have a 9 nodes cluster on AWS. Recently, some nodes were down and I want
to repair the cluster after I restarted them. But I found the repair
operation causes lots of memtable flush and then the JVM GC failed.
Consequently, the node hang.
I am using the cassandra 3.1.0.
java vers
Hi Reid,
Many thanks! Very helpful.
Will have a look at that source.
Ben
On Mon, Jan 13, 2020 at 2:08 PM Reid Pinchback
wrote:
> I can’t find it anywhere either, but I’m looking at a 3.11.4 source
> image. From the naming I’d bet that this is being used to fe
entation on
this but cannot seem to find it anywhere. Anyone know what this is
configuring and what the value implies?
Thanks in advance for your help.
Ben
h
cluster or DC?
Thanks,
Ben
On Sun, Dec 29, 2019 at 3:54 AM gloCalHelp.com
wrote:
> TO Oliver ：
>Maybe repair should be executed after all data in MEMTBL are all
> flushed into harddisk?
>
>
> Sincerely yours,
> Georgelin
> www_8ems_...@sina.com
> mobile:0086 180 598
We have some tooling that does that kind of thing using S3 rather than
attached EBS but a similar principle. There is a bit of an overview here:
https://www.instaclustr.com/advanced-node-replace/
It's become a pretty core part of our ops toolbox since we introduced it.
Cheers
Ben
---
The logs between first start and handshaking should give you a clue but my
first guess would be replaying commit logs.
Cheers
Ben
---
*Ben Slater**Chief Product Officer*
<https://www.instaclustr.com/platform/>
<https://www.facebook.com/instaclustr> <https://twitter.com/inst
ive stalls happening on either reading
> from disk or flushing dirty pages to disk.
>
>
>
>
>
> *From: *Ben Mills
> *Reply-To: *"user@cassandra.apache.org"
> *Date: *Monday, November 4, 2019 at 12:14 PM
> *To: *"user@cassandra.apache.org"
> *Subject: *Re: ***UNCHECKED*** Re: Memory Recommendations for G1GC
>
>
>
> CGroup
>
(as
I haven't shared our tuning goals), but any feedback is, again, appreciated.
On Mon, Nov 4, 2019 at 10:28 AM Reid Pinchback
wrote:
> Hi Ben, just catching up over the weekend.
>
>
>
> The typical advice, per Sergio’s link reference, is an obvious starting
> point.
Hi (yet again) Sergio,
Finally, note that we use this sidecar
<https://github.com/Stackdriver/stackdriver-prometheus-sidecar> for
shipping metrics to Stackdriver. It runs as a second container within our
Prometheus stateful set.
On Mon, Nov 4, 2019 at 8:46 AM Ben Mills wrote:
>
inside the JVM (heap space).
Hope this helps.
On Mon, Nov 4, 2019 at 8:26 AM Ben Mills wrote:
> Hi Sergio,
>
> Thanks for this and sorry for the slow reply.
>
> We are indeed still running Java 8 and so it's very helpful.
>
> This Cassandra cluster has been running reliably
e-tanzu/velero> for DR.
Hope this helps.
On Fri, Nov 1, 2019 at 5:34 PM Sergio wrote:
> Hi Ben,
>
> Well, I had a similar question and Jon Haddad was preferring ParNew + CMS
> over G1GC for java 8.
> https://lists.apache.org/thread.html/283547619b1dcdcddb80947a45e2178158394e317
a stress tool any
> configuration
>
> Sergio
>
> On Fri, Nov 1, 2019, 12:31 PM Ben Mills wrote:
>
>> Greetings,
>>
>> We are planning a Cassandra upgrade from 3.7 to 3.11.5 and considering a
>> change to the GC config.
>>
>> What is the minimum amo
ke you’ll end up with your entire database in memory.
>
>
>
> *From: *Ben Mills
> *Reply-To: *"user@cassandra.apache.org"
> *Date: *Friday, November 1, 2019 at 3:31 PM
> *To: *"user@cassandra.apache.org"
> *Subject: *Memory Recommendations for G1GC
Greetings,
We are planning a Cassandra upgrade from 3.7 to 3.11.5 and considering a
change to the GC config.
What is the minimum amount of memory that needs to be allocated to heap
space when using G1GC?
For GC, we currently use CMS. Along with the version upgrade, we'll be
running the stateful
Thanks Ghiyasi.
On Sat, Oct 26, 2019 at 9:17 AM Hossein Ghiyasi Mehr
wrote:
> If the problem exist still, and all nodes are up, reboot them one by one.
> Then try to repair one node. After that repair other nodes one by one.
>
> On Fri, Oct 25, 2019 at 12:56 AM Ben Mills wrote:
&g
> cause of a problem, but in your case there's so many potential problems I
> don't think it's worth digging into, especially since the problem might be
> one of the 500 or so bugs that were fixed since this release.
>
> Once you've done those things it'll
d when
the pods are down. This is a subtlety of running Cassandra in Kubernetes.
On Thu, Oct 24, 2019 at 4:24 PM Reid Pinchback
wrote:
> Ben, you may find this helpful:
>
>
>
> https://blog.pythian.com/so-you-have-a-broken-cassandra-sstable-file/
>
>
>
>
>
ou using Cassandra reaper?
>
> On Thu, Oct 24, 2019, 12:31 PM Ben Mills wrote:
>
>> Greetings,
>>
>> Inherited a small Cassandra cluster with some repair issues and need some
>> advice on recommended next steps. Apologies in advance for a long email.
>>
>>
Greetings,
Inherited a small Cassandra cluster with some repair issues and need some
advice on recommended next steps. Apologies in advance for a long email.
Issue:
Intermittent repair failures on two non-system keyspaces.
- platform_users
- platform_management
Repair Type:
Full, parallel rep
any useful response from the community.
Cheers
Ben
---
*Ben Slater**Chief Product Officer*
<https://www.instaclustr.com/platform/>
<https://www.facebook.com/instaclustr> <https://twitter.com/instaclustr>
<https://www.linkedin.com/company/instaclustr>
Read our latest t
://www.instaclustr.com/certified-apache-cassandra/
Cheers
Ben
---
*Ben Slater**Chief Product Officer*
<https://www.instaclustr.com/platform/>
<https://www.facebook.com/instaclustr> <https://twitter.com/instaclustr>
<https://www.linkedin.com/company/instaclustr>
Read our latest technica
Is the size of the data in your “state” column variable? The higher write
latencies at the 95%+ could line up with large volumes of data for
particular rows in that column (the one column not in both tables)?
Cheers
Ben
---
*Ben Slater**Chief Product Officer*
<https://www.instaclustr.
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 Apac
the two nodes dieing (although it’s very likely there will be three
replicas from the start if the cluster is in a healthy state at the time of
the write).
Cheers
Ben
---
*Ben Slater**Chief Product Officer*
<https://www.instaclustr.com/platform/>
<https://www.facebook.com/instaclustr&
many not have made its way to the third node by the time the first
two replicas are lost. If there is a replica on the third node it can be
recovered to the other two nodes by either rebuild (actually replace) or
repair.
Cheers
Ben
---
*Ben Slater**Chief Product Officer*
<ht
In scenario 2, if the row has been written to node 3 it will be replaced on
the other nodes via rebuild or repair.
---
*Ben Slater**Chief Product Officer*
<https://www.instaclustr.com/platform/>
<https://www.facebook.com/instaclustr> <https://twitter.com/inst
monitor the dropped mutations metrics.
Cheers
Ben
---
*Ben Slater**Chief Product Officer*
<https://www.instaclustr.com/platform/>
<https://www.facebook.com/instaclustr> <https://twitter.com/instaclustr>
<https://www.linkedin.com/company/instaclustr>
Read our latest t
, changes in topology
without following proper procedure, etc.
Cheers
Ben
---
*Ben Slater**Chief Product Officer*
<https://www.instaclustr.com/platform/>
<https://www.facebook.com/instaclustr> <https://twitter.com/instaclustr>
<https://www.linkedin.com/company/instaclu
inserted (relative to your attempt to
query it)?
Cheers
Ben
---
*Ben Slater**Chief Product Officer*
<https://www.instaclustr.com/platform/>
<https://www.facebook.com/instaclustr> <https://twitter.com/instaclustr>
<https://www.linkedin.com/company/instaclustr>
Read our lat
Ben
---
*Ben Slater**Chief Product Officer*
<https://www.instaclustr.com/platform/>
<https://www.facebook.com/instaclustr> <https://twitter.com/instaclustr>
<https://www.linkedin.com/company/instaclustr>
Read our latest technical blog posts here
<https://www.in
Is it possible that stress is overloading node 1 so it’s not recovering
state properly when node 2 comes up? Have you tried running with a lower
load (say 2 or 3 threads)?
Cheers
Ben
---
*Ben Slater*
*Chief Product Officer*
<https://www.facebook.com/instaclustr> <https://tw
Maybe stabledump can help you?
https://cassandra.apache.org/doc/4.0/tools/sstable/sstabledump.html
---
*Ben Slater*
*Chief Product Officer*
<https://www.facebook.com/instaclustr> <https://twitter.com/instaclustr>
<https://www.linkedin.com/company/instaclustr>
Read our lat
Not in the logs but I think you should be able to use the WRITETIME
function to view via CQL (see
https://cassandra.apache.org/doc/latest/cql/dml.html#select)
Cheers
Ben
---
*Ben Slater*
*Chief Product Officer*
<https://www.facebook.com/instaclustr> <https://twitter.com/instaclust
unsubscribe
–Ben Standefer
Sent via Superhuman ( https://sprh.mn/?vip=benstande...@gmail.com )
They don’t do exactly what you want but depending on why you are trying to
get this info you might find our sstable-tools useful:
https://github.com/instaclustr/cassandra-sstable-tools
---
*Ben Slater*
*Chief Product Officer*
<https://www.facebook.com/instaclustr> <https://tw
Yep, cassandra-stress doesn’t attempt to use the cqlshrc file. Seems to me
it could be convenient so might make a nice contribution to the project.
Cheers
Ben
---
*Ben Slater*
*Chief Product Officer*
<https://www.facebook.com/instaclustr> <https://twitter.com/instaclust
(in which case I don’t think there is one but stress has a hell of a lot of
options so I could be wrong).
Cheers
Ben
---
*Ben Slater*
*Chief Product Officer*
<https://www.facebook.com/instaclustr> <https://twitter.com/instaclustr>
<https://www.linkedin.com/company/instaclustr>
In what way does the cluster become unstable (ie more specifically what are
the symptoms)? My first thought would be the loss of the node causing the
other nodes to become overloaded but that doesn’t seem to fit with your
point 2.
Cheers
Ben
---
*Ben Slater*
*Chief Product Officer*
<ht
I wrote a blog post a while ago on the pros and cons of encrypting in your
application for use with Cassandra that you might find useful background on
this subject:
https://www.instaclustr.com/securing-apache-cassandra-with-application-level-encryption/
Cheers
Ben
On Wed, 14 Nov 2018 at 13:47
management environment but if you app functionality allows your to split
into multiple clusters (ie all your data is not all in one giant table)
then I would generally look to split. Splitting also gives you the
advantage of making it harder to have an outage that brings everything down.
Cheers
Ben
On
rn e-mail. 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
For anyone who is interested, we’ve published a blog with some more
background on this and some more detail of our ongoing plans:
https://www.instaclustr.com/instaclustr-support-cassandra-lucene-index/
Cheers
Ben
On Fri, 19 Oct 2018 at 09:42 kurt greaves wrote:
> Hi all,
>
>
een solved before.
- The Cassandra examples in the official Kubernetes documentation is not
something you want to take into production.
Cheers
Ben
On Thu, Oct 11, 2018 at 6:50 PM Goutham reddy
wrote:
> Hi,
> We are in the process of setting up Cassandra cluster with high
> availabilit
o PDF e-mail accounts will be archived and may
> be scanned by us and/or by external service providers to detect and prevent
> threats to our systems, investigate illegal or inappropriate behavior,
> and/or eliminate unsolicited promotional e-mails (“spam”). If you have any
> concerns
-application-level-encryption/
We also use encrypted GP2 EBS pretty widely without issue.
Cheers
Ben
On Thu, 2 Aug 2018 at 05:38 Jonathan Haddad wrote:
> You can also get full disk encryption with LUKS, which I've used before.
>
> On Wed, Aug 1, 2018 at 12:36 PM Jeff Jirsa w
We (Instaclustr) will be submitting a PR for 3.11.3 support for
cassandra-lucene-index once 3.11.3 is officially released as we offer it as
part of our service and have customers using it.
Cheers
Ben
On Wed, 1 Aug 2018 at 14:06 onmstester onmstester
wrote:
> It seems to be an interest
Note that that writetimeout exception can be C*s way of telling you when
there is contention on a LWT (rather than actually timing out). See
https://issues.apache.org/jira/browse/CASSANDRA-9328
Cheers
Ben
On Sun, 22 Jul 2018 at 11:20 Goutham reddy
wrote:
> Hi,
> As it is a single partiti
like GC etc, but feel
free to submit a PR!
Ben
On Mon, Jul 9, 2018 at 12:03 AM Rahul Singh
wrote:
> How often are you polling the JMX? How much of a spike are you seeing in
> CPU?
>
> --
> Rahul Singh
> rahul.si...@anant.us
>
> Anant Corporation
> On Jul 5, 2
Hi Pranay
We (Instaclustr) provide enterprise support for Cassandra (
https://www.instaclustr.com/services/cassandra-support/) which may cover
what you are looking for.
Please get in touch direct if you would like to discuss.
Cheers
Ben
On Tue, 29 May 2018 at 10:11 Pranay akula
wrote:
>
r...
>
> 2018-05-23 17:17 GMT+02:00 Ben Bromhead :
>
>> 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.
>>
>> A f
ent gromakowski <
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 :
>
>> You can get a good way wit
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 case.
>
>
>
> *Questions?*
>
> Is K8s a reasonable choice for managing a production C* cluster?
>
> Are there documented use cases for this?
>
>
>
> Any help would be greatly appreciated.
>
>
>
> --
>
> Regards,
>
>
>
> *Hassaan Pasha*
>
> --
>
> Regrads,
>
> Pavel Sapezhko
>
>
>
--
Ben Bromhead
CTO | Instaclustr <https://www.instaclustr.com/>
+1 650 284 9692
Reliability at Scale
Cassandra, Spark, Elasticsearch on AWS, Azure, GCP and Softlayer
but you might also find relevant:
https://www.instaclustr.com/cassandra-connector-for-spark-5-tips-for-success/
Cheers
Ben
On Thu, 17 May 2018 at 18:06 Arbab Khalil wrote:
> We have been exploring IoT specific C* schema design over the past few
> months. We wanted to share the benchmarkin
The snapshot gives you a complete set of your sstables at a point in time.
If you were copying sstables directly from a live node you would have to
deal with files coming and going due to compactions.
Cheers
Ben
On Thu, 10 May 2018 at 16:45 wrote:
> Dear Community,
>
>
>
> Is th
8 (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
then a single write to
hotel_enabled. hotel_enabled could also be something like hotel_details so
the other tables really are just indexes. You need to do more reads but
whatever you do consistency doesn’t come for free.
Cheers
Ben
On Thu, 26 Apr 2018 at 12:44 Rajesh Kishore wrote:
> Correct
find inconsistencies.
- If read_repair_chance or dc_local_read_repair_chance are >0 then extra
replicas are checked as part of the query for the % of queries specified by
the chance setting. Again, if inconsistencies are found, they are repaired.
I expect this mechanism would still apply for CL=ONE.
Ch
level (eg in the catch block delete the records that were
inserted). That, however, does not provide you the isolation part of ACID.
You also tend to find that if you have properly denormalised your data
model for Cassandra there is less requirement for these type of batched
updates.
Cheers
Ben
O
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.instaclustr.com/>
+1
Thanks Jeff.
On Thu, Apr 12, 2018, 21:37 Jeff Jirsa wrote:
> Pretty sure Ben meant that datastax produces DSE, not Cassandra, and since
> the questions specifically mentions DSE in the subject (implying that the
> user is going to be running either solr or spark within DSE t
On Thu, Apr 12, 2018, 21:23 Niclas Hedhman wrote:
> Ben,
>
> 1. I don't see anything in this thread that is DSE specific, so I think it
> belongs here.
>
DSE is literally in the title.
> 2. Careful when you say that Datastax produces Cassandra. Cassandra is a
>
. Spark is notorious for causing
>>>> latency spikes in Cassandra which is not great if you are are sensitive to
>>>> that.
>>>>
>>>> Regards,
>>>> Evelyn.
>>>>
>>>> On 12 Apr 2018, at 6:55 am, kooljava2
>>>> wrote:
>>>>
>>>> Hello,
>>>>
>>>> We are exploring on configuring Sorl/Spark. Wanted to get input on
>>>> this.
>>>> 1) How do we decide which one to use?
>>>> 2) Do we run this on a DC where there is less workload?
>>>>
>>>> Any other suggestion or comments are appreciated.
>>>>
>>>> Thank you.
>>>>
>>>>
>>>>
>>> --
Ben Bromhead
CTO | Instaclustr <https://www.instaclustr.com/>
+1 650 284 9692
Reliability at Scale
Cassandra, Spark, Elasticsearch on AWS, Azure, GCP and Softlayer
> http://www.thelastpickle.com
>>
>> 2018-04-04 9:44 GMT+01:00 sujeet jog :
>>
>>> 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
erson working on it
(or are offering to work on it instead) and can get it ready for review in
a timely fashion. That way we can build a more realistic working target.
For major breaking changes, there is always 5.0 or 4.1 or whatever we end
up doing :)
Cheers
Ben
On Thu, Feb 15, 2018 at 9:39 PM
Sent using Zoho Mail <https://www.zoho.com/mail/>
>
>
> ---- On Sun, 18 Mar 2018 13:14:54 +0330 *Ben Slater
> >* wrote
>
> When you say batch was worth than async in terms of throughput are you
> comparing throughput with the same number of threads or something? I w
oughput but much less
> CPU usage at client side.
>
> Sent using Zoho Mail <https://www.zoho.com/mail/>
>
>
> On Sun, 18 Mar 2018 12:46:02 +0330 *Ben Slater
> >* wrote
>
> You will probably find grouping writes into small batches improves overall
>
You will probably find grouping writes into small batches improves overall
performance (if you are not doing it already). See the following
presentation for some more info:
https://www.slideshare.net/Instaclustr/microbatching-highperformance-writes
Cheers
Ben
On Sun, 18 Mar 2018 at 19:23
I think that is probably a question for the Spark Connector forum:
https://groups.google.com/a/lists.datastax.com/forum/#!forum/spark-connector-user
as
it’s much more related to the function of the connector than functionality
of Cassandra itself.
Cheers
Ben
On Sat, 17 Mar 2018 at 21:18
server. Since the last write wins, the data generator should be the
> one setting its timestamp.
>
> On Thu, Mar 8, 2018 at 2:12 PM, Ben Slater
> wrote:
>
>> It is important to make sure you are using the same NTP servers across
>> your cluster - we used to see relatively fr
-synchronization/ which
references some really good and detailed posts from logentries.com on the
potential issues).
Cheers
Ben
On Fri, 9 Mar 2018 at 02:07 Michael Shuler wrote:
> As long as your nodes are syncing time using the same method, that
> should be good. Don't mix daemons, however, sin
You should be able to follow the same approach(s) as restoring from a
backup as outlined here:
https://docs.datastax.com/en/cassandra/2.1/cassandra/operations/ops_backup_snapshot_restore_t.html#ops_backup_snapshot_restore_t
Cheers
Ben
On Thu, 8 Mar 2018 at 17:07 onmstester onmstester
wrote
want to check
out deleting compaction strategy to see if it works for your use case:
https://github.com/protectwise/cassandra-util/tree/master/deleting-compaction-strategy
Cheers
Ben
On Wed, 7 Mar 2018 at 17:19 Charulata Sharma (charshar)
wrote:
> Well it’s not like that. We don’t just pu
issues.
Cheers
Ben
On Tue, 6 Mar 2018 at 22:18 Faraz Mateen wrote:
> Thanks a lot for the response.
>
> Setting consistency to ALL/TWO started giving me consistent count results
> on both cqlsh and spark. As expected, my query time has increased by 1.5x (
> Before, it was taking ~1.6
but requires all replicas to be available for the query
to succeed. If you are using QUORUM for your writes then querying at QUORUM
or LOCAL_QUORUM as appropriate should give you consistent results.
Cheers
Ben
On Sun, 4 Mar 2018 at 00:59 Kant Kodali wrote:
> The fact that cqlsh itself gi
of this issues you have raised is just the same way that Microsoft does
with CosmosDB (ie hiding them behind our managed service tooling).
Cheers
Ben
On Wed, 21 Feb 2018 at 19:22 DuyHai Doan wrote:
> For UI and interactive data exploration there is already the Cassandra
> interpreter for
ess object pointer.
> (Of course talking about ES)
>
> But if this is a general theory about the JVM, does that apply to
> Cassandra as well?
>
> I am using a 64 GB physical memory server and I am concerned about heap
> size allocation.
>
> Thank you.
>
--
Ben Wood
Software Engineer - Data Agility
Mesosphere
rce-applied it before actually reading the new
value
On Sun, Feb 11, 2018 at 5:36 PM, Mahdi Ben Hamida <mailto:ma...@signalfx.com>> wrote:
Totally understood that it's not worth (or it's rather incorrect)
to mix serial and non serial operations for LWT tables. It woul
Haddad wrote:
If you want consistent reads you have to use the CL that enforces it.
There’s no way around it.
On Fri, Feb 9, 2018 at 2:35 PM Mahdi Ben Hamida <mailto:ma...@signalfx.com>> wrote:
In this case, we only write using CAS (code guarantees that). We
also never update, just inser
33 PM, Mahdi Ben Hamida <mailto:ma...@signalfx.com>> wrote:
Under what circumstances would we be reading inconsistent results
? Is there a case where we end up reading a value that actually
end up not being written ?
If you ever write the same value with CAS and without
level but serial for reading
tables updated by LWT operations. Otherwise you might end up reading
inconsistent results.
On 09.02.18 08:06, Mahdi Ben Hamida wrote:
Hello,
I'm running a 2.0.17 cluster (I know, I know, need to upgrade) with
46 nodes across 3 racks (& RF=3). I'
Hello,
I'm running a 2.0.17 cluster (I know, I know, need to upgrade) with 46
nodes across 3 racks (& RF=3). I'm seeing that under high contention,
LWT may actually not guarantee uniqueness. With a total of 16 million
LWT transactions (with peak LWT concurrency around 5k/sec), I found 38
conf
wrote:
> Hi All,
>
> What kind of Automation you have for Cassandra related operations on AWS
> like restacking, restart of the cluster , changing cassandra.yaml
> parameters etc ?
>
> Thanks
>
>
--
Ben Wood
Software Engineer - Data Agility
Mesosphere
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Ben Wood
Software Engineer - Data Agility
Mesosphere
We’re seeing evidence across our fleet that AWS has rolled something out in
the last 24 hours that has significantly reduce the performance impacts -
back pretty close to pre-patch levels. Yet to see if the impacts come back
with o/s patching on top of the improved hypervisor.
Cheers
Ben
On
generic
enough to work in any virtualised environment. You can find more detail
here if interested:
https://www.instaclustr.com/instaclustr-dynamic-resizing-for-apache-cassandra/
Cheers
Ben
On Sat, 18 Nov 2017 at 05:02 Anshu Vajpayee
wrote:
> Cassandra supports elastic scalability - meaning
transaction in AWS West as local dc)*.
>>
>>
>> 2. Utilize the https://github.com/gitaroktato/cassandra-replication-
>> latency-tools open source project where a Python Cassandra clients
>> writes in one Data Center and other client reads in other data center.
>>
>>
>> Can you please suggest if my strategies above will help in finding the
>> Inter DC latency or there are other ways I need to follow.
>>
>>
>> Thank You,
>> Bill Walters.
>>
>>
>>
>
--
Ben Wood
Software Engineer - Data Agility
Mesosphere
.
> >>>
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> >>
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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: +7.921.915.06.28 <+7%20921%20915-06-2
t.
>
> 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 just happen to meet.
For minimum disruption to your production cluster, restoring from backups
is probably the best option. However, there is no reason adding a DC,
building and then splitting shouldn’t work if done correct.
Cheers
Ben
On Tue, 8 Aug 2017 at 07:11 Robert Wille wrote:
> We need to make a copy o
I’m not sure it’s going to help you a lot as the issue is still open and
there is not a lot of info in the ticket but your issue looks a lot like
this JIRA to me:
https://issues.apache.org/jira/browse/CASSANDRA-13363
Cheers
Ben
On Tue, 18 Jul 2017 at 17:46 Shashikant Kulkarni (शशिकांत कुलकर्णी
functionality in most circumstances.
Cheers
Ben
On Thu, 22 Jun 2017 at 08:27 Mark Furlong wrote:
> Can a repair be paused, and if paused can it be restarted from the point
> of the pause, or does it start over?
>
>
>
> *Mark Furlong*
>
> Sr. Database Administrator
>
>
with Cassandra and
next to impossible to achieve with RDBMS.
Cheers
Ben
On Thu, 15 Jun 2017 at 18:17 Ali Akhtar wrote:
> A client recently inquired about the costs of running Cassandra vs a
> traditional RDBMS like Postgres or Mysql, in the cloud.
>
> They are releasing a b2b pro
meet
your needs.
Cheers
Ben
On Sun, 21 May 2017 at 21:47 varun saluja wrote:
> Hi All,
>
> Can someone Please suggest any recommendations for write intensive jobs
>
> Regards,
> Varun Saluja
> Sent from my iPhone
>
> On 17-May-2017, at 3:52 PM, varun saluja wrote:
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