ight Way of "filtering" a large column family by
type?
Coming from an RDBMS-ingrained mindset, it seems kind of awkward...
Thanks!
James
you may use: nodetool upgradesstables -a keyspace_name table_name
it will re-write this table's sstable files to current version, while
re-writing, will evit droppable tombstones (expired + gc_grace_seconds
(default 10 days) ), if partition cross different files, they will still be
kept, but most
Hi guys,
Can standard OSS Cassandra 3 do logging of who connects to it? We have a
cluster in 3 DCs and our devs want to see if the client is crossing across DC
(even though they have DCLOCAL set from their DS driver).
Thanks,
James
nodetool repair -pr on every node --- covered all ranges of data.
On Sun, Jul 1, 2018 at 7:03 AM, Riccardo Ferrari wrote:
> Hi list,
>
> After long time of operation we come to the need of growing our cluster.
> This cluster was born on 2.X and almos 2 years ago migrated to 3.0.6 ( I
> kno
other concerns:
there is no replication between 2.11 and 3.11, store in hints, and replay
hints when remote is same version. have to do repair if over window. if
read quorum 2/3, will get error.
in case rollback to 2.11, can not read new version 3.11 data files, but
online rolling upgrade, some
does your application really need counter ? just an option.
Thanks,
James
On Mon, Jul 23, 2018 at 10:57 AM, learner dba wrote:
> Thanks a lot Ben. This makes sense but feel bad that we don't have a
> solution yet. We can try consistency level one but that will be against
> ge
... look the largest or oldest one first
of course, other factors may be, like disk space, etc
also what are compaction_throughput_mb_per_sec in cassandra.yaml
Hope it is helpful.
Thanks,
James
On Wed, Jul 25, 2018 at 4:18 AM, Martin Mačura wrote:
> Hi,
> we have a table which is
user_detail.
Just my 2 cents. hope helpful.
Thanks,
James
On Sun, Jul 29, 2018 at 11:20 PM, onmstester onmstester wrote:
>
> How many rows in average per partition?
>
> around 10K.
>
>
> Let me get this straight : You are bifurcating your partitions on either
> email o
may not get it success.
It is similar to rdbms, alter table in a heavy transaction PROD env, may
get resource busy error.
in non-prod, we always apply new DDL without stop applications, never had
issue.
Thanks,
James
On Tue, Jul 31, 2018 at 1:37 AM, Jeff Jirsa wrote:
> This is safe (
an be reached using "JamesBTobin (at) Gmail (dot) Com".
Kind regards, James
-
To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org
For additional commands, e-mail: user-h...@cassandra.apache.org
with JBOD you end up near
100% chance of failure after 3 years or so.4) generally you will not have
enough warning of a looming failure with JBOD compared to LVM/RAID.
(Somecompanies take a week or two to replace a failed disk.)
JBOD is easy to setup, but hard to manage. Thanks, James.
From:
interesting. what are insert statement and select statement ?
Thanks,
James
On Wed, Aug 22, 2018 at 6:55 PM, Gosar M
wrote:
> CREATE TABLE user_data (
> "userid" text,
> "secondaryid" text,
> "tDate" timestamp,
> &quo
can you run this:
select writetime( associate_degree ) from user_data where
see what are writetime
On Wed, Aug 22, 2018 at 7:03 PM, James Shaw wrote:
> interesting. what are insert statement and select statement ?
>
> Thanks,
>
> James
>
> On Wed, Aug 22, 2018 at 6:55
can you run this:
select associate_degree, writetime( associate_degree ) from user_data where
Thanks,
James
On Wed, Aug 22, 2018 at 7:13 PM, James Shaw wrote:
> can you run this:
> select writetime( associate_degree ) from user_data where
> see what are writetime
>
>
you may go OS level to delete the files.That's what I did before. Truncate
action is frequently failed on some remote nodes in a heavy transactions
env.
Thanks,
James
On Thu, Aug 23, 2018 at 8:54 PM, Rahul Singh
wrote:
> David ,
>
> What CL do you set when running this comm
/ write latency, read / write time out.
Any advice is welcome. I appreciate your help!
Thanks,
James
Adam:
Thanks!
Very helpful. I will take a look.
James
On Mon, Sep 24, 2018 at 6:59 PM Adam Zegelin wrote:
> Hi James,
>
> Prometheus is the most common monitoring solution for K8s-managed
> applications.
>
> There are a number of options to get Cassandra metrics into
I am trying to find 4.x SNAPSHOT builds. Are they available anywhere
handy? I'm trying to work on Java 11 compatibility for a library.
Thanks,
James
Okay, cool. So, 4.0.0-SNAPSHOT doesn’t have Java 11 support quite yet? No
big deal. Just trying to get ahead of the game and be ready once we have
it. Thanks, Jonathan!
On Sat, Sep 29, 2018 at 11:16 AM Jonathan Haddad wrote:
> Hey James, you’ll have to build it. Java 11 is out but
Are you using the Java driver? The default timestamp generator is
client-side now (since 3.0 I believe), so if you don’t change it, you need
your client clocks to be in sync also.
On Sat, Oct 13, 2018 at 1:24 PM Naik, Ninad wrote:
> Thanks Maitrayee. I should have mentioned this as one of the thi
PM Naik, Ninad wrote:
> Thanks James. Yeah, we're using the datastax java driver. But we're on
> version 2.1.10.2. And we are not using the client side timestamps.
> ------
> *From:* James Carman
> *Sent:* Saturday, October 13, 2018 1
For those relatively new to Cassandra, Riptano is the previous company name for
Datastax, back in 2011. :)
http://www.h-online.com/open/news/item/Cassandra-service-company-Riptano-changes-name-to-DataStax.html
Thanks, James Briggs.
--
Cassandra/MySQL DBA. Available in San Jose area or remote
https://docs.datastax.com/en/cassandra/3.0/cassandra/operations/opsTuneJVM.html
http://thelastpickle.com/blog/2018/04/11/gc-tuning.html
Your cluster:
Which version of Java?
How much RAM do your systems have?Is it the same on all nodes?What are your
current heap settings?Anything else?
Thanks, James B
Hi folks.
Please check out my online vnodes reliability calculator and reply with any
feedback:http://www.jebriggs.com/blog/2019/02/cassandra-vnodes-reliability-calculator/
Thanks, James Briggs.
--
Cassandra/MySQL DBA. Available in Bay Area or remote.
cass_top: https://github.com/jamesbriggs
r message to grep for. 4) Note that Datastax
recommends 8 vnodes now. See my blog for the reference.
Thanks, James Briggs.
--
Cassandra/MySQL DBA. Available in Bay area or remote.
cass_top: https://github.com/jamesbriggs/cassandra-top
From: Kenneth Brotman
To: user@cassandra.apache.org
ombstones:
> 0.883205790993204613G Mar 26 11:34 mc-254400-big-Data.db
>
>
> What is the best way to do this? This is on a production system so any
> help would be greatly appreciated.
>
> Thanks,
>
--
James Brown
Engineer
-list using "JamesBTobin (at) Gmail (dot) Com". Kind
regards, James
-
To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org
For additional commands, e-mail: user-h...@cassandra.apache.org
Some user lists allow it. Does the Cassandra community mind folks
announcing their super cool Cassandra libraries on this list? Is there a
page for us to list them?
we welcome the
feedback.
Thanks,
James Carman
You could shade it into another jar.
On Fri, Jun 3, 2016 at 9:08 PM Carolina Simoes Gomes <
carolina.go...@huawei.com> wrote:
> Hello,
>
>
>
> I am using Cassandra 3.2.1 and the 3.0.0 driver. I need to build the
> driver but with all its dependencies included in the jar (uber jar), using
> maven,
Congrats, Jeff! I'll definitely check it out.
On Tue, Aug 2, 2016 at 12:36 PM Jeff Carpenter <
jeff.carpen...@choicehotels.com> wrote:
> Hello
>
> I’m excited to announce that the 2nd edition of Cassandra: The Definitive
> Guide is now available from O’Reilly Media.
> http://shop.oreilly.com/pro
Was the Google stuff really necessary? Couldn't you have just nicely told
them how to unsubscribe?
On Sat, Aug 13, 2016 at 7:52 PM Alain RODRIGUEZ wrote:
> Hi,
>
> You did not unsubscribe yet.
>
> 'unsubscribe cassandra' in google search:
>
> Result 1: http://www.planetcassandra.org/apache-cassa
he patronizing responses with Google links help at all.
>
>
> _
> From: James Carman
> Sent: Saturday, August 13, 2016 8:24 PM
> Subject: Re: unsubscibe
> To:
>
>
>
> Was the Google stuff really necessary? Couldn't you have just
an send
> an email to the list. The latter is the reason I am suggesting that this be
> worked in as an additional way to unsubscribe from the list.
>
>
>
>
>
> On Sat, Aug 13, 2016 at 8:39 PM -0400, "James Carman" <
> ja...@carmanconsulting.com> wrote:
On Mon, Aug 15, 2016 at 10:28 AM Eric Evans
wrote:
>
> I'm always surprised when a Google search for 'unsubscribe cassandra'
> doesn't return mailing list results from people nicely telling someone
> how to unsubscribe.
>
>
Agreed. It doesn't make for a very welcoming community to attract new
co
mentioned
>> everywhere, should work better and spam less people.
>
>
> Those are just facts. It's concise, I agree, but be sure of my good
> intentions there. I do not spend time being bad at people, this is a lost
> of time. I try to help here, as I did for the last 4+ ye
aking
snapshot so it pauses at that particular CF ??
Thanks
James.
can i debug this ??
Thanks
James
.jar:2.1.8.689]
at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:105)
[cassandra-all-2.1.8.689.jar:2.1.8.689]
at java.lang.Thread.run(Unknown Source) [na:1.8.0_92]
Thanks
James.
-2.1.8.689.jar:2.1.8.689]
at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:105)
[cassandra-all-2.1.8.689.jar:2.1.8.689]
at java.lang.Thread.run(Unknown Source) [na:1.8.0_92]
Thanks
James.
What should I grep for in the logs to see if read repair is happening on a
table?
Is there an official notification of these EOL dates somewhere?
On Wed, Nov 30, 2016 at 4:38 AM, kurt Greaves wrote:
> Latest release in 2.2. 2.1 is borderline EOL and from my experience 2.2 is
> quite stable and has some handy bugfixes that didn't actually make it into
> 2.1
>
> On 30 November
Hi. First, some details;
* Ubuntu 14.04.2 LTS.
* Oracle Java 8
* Cassandra 2.2 (from datastax repo)
* AWS VPC - two regions (Oregon, Ireland)
* A pair of 3 node DCs in a single cluster - 1 DC per region as above
* Ec2Snitch (NOT the Ec2MultiRegionSnitch - does not work in a VPC
environment)
In fo
>
>
>
> Why are you using 2.2? In general Cassandra, like most software, can lack
> stability near the bleeding edge.
>
>
I'll be honest, I didn't realise I was using the bleeding edge! I had begun
playing around with dsc21 (from the datastax apt repo) but when that failed
to install correctly due
good evening;
> On 2015-12-01, at 21:17, Steve Robenalt wrote:
>
> Hi Tony,
>
> Somebody will likely prove me wrong on this (and I'd love to see it), but I'm
> skeptical that there is much intersection between the set of things a GPU is
> good at and the set of things a database needs to do.
good morning;
> On 2015-12-01, at 21:53, Steve Robenalt <mailto:sroben...@highwire.org>> wrote:
>
> Hi James,
>
> Yup, the analytics side of database usage is ripe with possibilities, as the
> site at your link shows.
that case is not the “analytics”, but the
/72714e6d0ea3508e24cc
Should we expect this to work? Should LOCAL_QUORUM be sufficient? If so,
what type of setup issues would we look for which would cause these types
of issues?
Thanks,
James
On Tue, Dec 15, 2015 at 2:57 PM Paulo Motta
wrote:
> What cassandra and driver versions are you running?
>
>
We are using 2.1.7.1
> It may be that the second update is getting the same timestamp as the
> first, or even a lower timestamp if it's being processed by another server
> with unsynced
Hi all,
We’ve spent a few days running things but are in the same position. To add
some more flavour:
- We have a 3-node ring, replication factor = 3. We’ve been running in
this configuration for a few years without any real issues
- Nodes 2 & 3 are much newer than node 1. These two no
6af4-4c80-b280-e7fdd61924d3 rack1
>
>
>
> Thanks
> Anuj
>
> Sent from Yahoo Mail on Android
> <https://overview.mail.yahoo.com/mobile/?.src=Android>
>
> On Wed, 13 Jan, 2016 at 10:34 pm, James Griffin
> wrote:
> Hi all,
>
> We’ve spent a few days running t
n node 3.May be you can try investigating logs to see whats
> happening.
>
> Others on the mailing list could also share their views on the situation.
>
> Thanks
> Anuj
>
>
>
> Sent from Yahoo Mail on Android
> <https://overview.mail.yahoo.com/mobile/?.src=Android>
>
> or concurrent mode failures?
>
> If you are on CMS, you need to fine tune your heap options to address full
> gc.
>
>
>
> Thanks
> Anuj
>
> Sent from Yahoo Mail on Android
> <https://overview.mail.yahoo.com/mobile/?.src=Android>
>
> On Thu, 14 Jan, 2
0 6326
Responses n/a 0 219356
Best wishes,
Griff
[image: idioplatform] <http://idioplatform.com/>James "Griff" Griffin
CTO
Switchboard: +44 (0)20 3540 1920 | Direct: +44 (0)7763 139 206 | Twitter:
@imaginaryroots <http://twitter
[image: idioplatform] <http://idioplatform.com/>James "Griff" Griffin
CTO
Switchboard: +44 (0)20 3540 1920 | Direct: +44 (0)7763 139 206 | Twitter:
@imaginaryroots <http://twitter.com/imaginaryroots> | Skype: j.s.griffin
idio helps major brands and publishers to build closer re
. We
still don't fully understand why this kernel bug didn't affect *all *our
nodes (in the end we had three nodes with that kernel, only two of them
exhibited this issue), but there we go.
Thanks everyone for your help
Cheers,
Griff
On 14 January 2016 at 15:14, James Griffin
wrote:
Just curious here ... when did EBS become OK for C*? Didn't they always
push towards using ephemeral disks?
On Wed, Feb 3, 2016 at 12:17 PM, Ben Bromhead wrote:
> For what it's worth we've tried d2 instances and they encourage terrible
> things like super dense nodes (increases your replacement
I am trying to perform the following operation:
public Create createCreate() {
Create create =
SchemaBuilder.createTable("foo").addPartitionColumn("bar",
varchar()).addClusteringColumn("baz", varchar);
if(descending) {
create.withOptions().clusteringOrder("baz", Direction.DESC);
return c
No thoughts? Would an upgrade of the driver "fix" this?
On Wed, Mar 30, 2016 at 10:42 AM James Carman
wrote:
> I am trying to perform the following operation:
>
> public Create createCreate() {
> Create create =
> SchemaBuilder.createTable("foo").
at may be more helpful:
> https://groups.google.com/a/lists.datastax.com/forum/#!forum/java-driver-user
>
> On Thu, Mar 31, 2016 at 4:40 PM, James Carman
> wrote:
>
>> No thoughts? Would an upgrade of the driver "fix" this?
>>
>> On Wed, Mar 30, 2016 at 10
But, if there were a Java driver provided by the Apache Cassandra project
itself, then it'd be an easy choice.
On Fri, Apr 1, 2016 at 2:16 PM Robert Coli wrote:
> On Fri, Apr 1, 2016 at 10:43 AM, James Carman
> wrote:
>
>> A, my bad. One might wonder why the hec
Since when did this become a DataStax support email list? If folks have
questions about DataStax products, shouldn't they be contacting the company
directly?
On Sun, Apr 10, 2016 at 1:13 PM Jeff Jirsa
wrote:
> It is possible to use OpsCenter for open source / community versions up to
> 2.2.x.
Why does the text need to be the key?
On Mon, Apr 11, 2016 at 6:04 PM Robert Wille wrote:
> I have a need to be able to use the text of a document as the primary key
> in a table. These texts are usually less than 1K, but can sometimes be 10’s
> of K’s in size. Would it be better to use a digest
S3 maybe?
On Mon, Apr 11, 2016 at 7:05 PM Robert Wille wrote:
> I do realize its kind of a weird use case, but it is legitimate. I have a
> collection of documents that I need to index, and I want to perform entity
> extraction on them and give the extracted entities special treatment in my
> ful
When trying to run the example-script.pig, I get the following error, null
error.
tsunami:pig schappetj$ bin/pig_cassandra -x local example-script.pig
Using /Library/pig-0.10.0/pig-0.10.0.jar.
2012-12-12 11:02:54,079 [main] INFO org.apache.pig.Main - Apache Pig
version 0.10.0 (r1328203) compil
per.java:176)
>
> This line does not match the source code for the 1.2.0-beta3 tag.
>
> Can you try it with the 1.1.7 bin distro ?
>
> Cheers
>
> -
> Aaron Morton
> Freelance Cassandra Developer
> New Zealand
>
> @aaronmorton
> http://www.thelastpi
me, cassandra hasn't had a
chance to cache this data, but it's likely in the Linux disk cache,
given the sizing of the node/data/jvm.
thanks
James M
Hi,
thanks for the reply
On 21/12/12 14:36, Yiming Sun wrote:
I have a few questions for you, James,
1. how many nodes are in your Cassandra ring?
2 or 3 - depending on environment - it doesn't seem to make a difference
to throughput very much. What is a 30 minute task on a 2
On 21/12/12 16:27, Yiming Sun wrote:
James, using RandomPartitioner, the order of the rows is random, so when
you request these rows in "Sequential" order (sort by the date?),
Cassandra is not reading them sequentially.
Yes, I understand the "next" row to be retrieved i
if
the volume is 'local' or not, everything goes through the same caching
strategy. Again, because this is VMware, it appears as a 'local' disk
anyway.
In short, disk isn't the limiting factor here.
thanks
James M
On 21/12/12 17:56, Yiming Sun wrote:
James, you could experiment with Row cache, with off-heap JNA cache, and
see if it helps. My own experience with row cache was not good, and the
OS cache seemed to be most useful, but in my case, our data space was
big, over 10TB. Your sequential access
500 key-value pairs per second is pretty poor performance
compared to Cassandra's competitors, no? I'd rather understand why
performance is bad, rather than throw hardware into a black hole!
Also is it possible to batch the writes together?
I'll ask.
thanks for persevering!
James M
left on my list for investigation are memtable sizes /
eviction and JNA - and trying to capture some of the requests that are
causing the spikes for further investigation.
James M
On 31/12/12 10:05, James Masson wrote:
Hi Yiming,
I've had the chance to observe what happens to cassandr
On 31/12/12 18:45, Tyler Hobbs wrote:
On Mon, Dec 31, 2012 at 11:24 AM, James Masson mailto:james.mas...@opigram.com>> wrote:
Well, it turns out the Read-Request Latency graph in Ops-Center is
highly misleading.
Using jconsole, the read-latency for the column family in qu
On 02/01/13 16:18, Tyler Hobbs wrote:
On Wed, Jan 2, 2013 at 5:28 AM, James Masson mailto:james.mas...@opigram.com>> wrote:
>
1) Hector sends a request to some node in the cluster, which will act as
the coordinator.
2) The coordinator then sends the actual read requests out to ea
I also saw this while testing the
https://github.com/boneill42/naughty-or-nice example project.
--Jimmy
From: Kuldeep Mishra
Reply-To:
Date: Tuesday, January 15, 2013 10:29 AM
To:
Subject: error when creating column family using cql3 and persisting data
using thrift
Hi,
I am facing f
Here are a few examples I have worked on, reading from xml.gz files then
writing to cassandara.
https://github.com/jschappet/medline
You will also need:
https://github.com/jschappet/medline-base
These examples are Hadoop Jobs using Cassandra as the Data Store.
This one is a good place to st
er, but I just want to use Hadoop Jobs (Pig and Hive) to read
>data from it. I would like to use the same configuration as
>http://www.datastax.com/dev/blog/hadoop-mapreduce-in-the-cassandra-cluster
> but I want to know if there are alternatives to DataStax Enterprise
>package.
>
>
CFS is Cassandra File System:
http://www.datastax.com/dev/blog/cassandra-file-system-design
But you don't need CFS to connect from PIG to Cassandra. The latest
versions of Cassandra Source ship with examples of connecting from pig to
cassandra.
apache-cassandra-1.2.0-src/examples/pig --
http
--
Cyril Scetbon
On Jan 17, 2013, at 2:42 PM, James Schappet wrote:
> CFS is Cassandra File System:
> http://www.datastax.com/dev/blog/cassandra-file-system-design
>
>
> But you don't need CFS to connect from PIG to Cassandra. The latest versions
> of Cassandra Source
I just want to know if there is a limitation here or not,
as I have no idea when 1.2 support will exist in astyanax.
That said, are there other java (scala) libraries that people use to
connect to cassandra that support 1.2?
-James-
On Thu, Jan 17, 2013 at 8:30 AM, wrote:
> Ok, I underst
On Feb 17, 2013 10:27 AM, "puneet loya" wrote:
>
> unsubscribe me please.
>
> Thank you
Does all of this Scylla talk really even belong on the Cassandra user
mailing list in the first place?
On Sun, Mar 12, 2017 at 4:07 PM Jeff Jirsa wrote:
On 2017-03-11 22:33 (-0700), Dor Laor wrote:
> On Sat, Mar 11, 2017 at 10:02 PM, Jeff Jirsa wrote:
> > On 2017-03-10 09:57 (-0800), Rake
Cassandra) isn't cool, IMHO.
On Sun, Mar 12, 2017 at 5:04 PM Kant Kodali wrote:
yes.
On Sun, Mar 12, 2017 at 2:01 PM, James Carman
wrote:
Does all of this Scylla talk really even belong on the Cassandra user
mailing list in the first place?
On Sun, Mar 12, 2017 at 4:07 PM Jeff Jirsa wr
Have you tried using PreparedStatements?
On Sat, Mar 18, 2017 at 9:47 PM S G wrote:
> ok, I gave the executeAsync() a try.
> Good part is that it was really easy to write the code for that.
> Bad part is that it did not had a huge effect on my throughput - I gained
> about 5% increase in through
I've heard about this ... how did the problem present itself?
Sent from my iPhone
> On May 5, 2017, at 3:17 PM, Jeff Jirsa wrote:
>
>
>
>> On 2017-05-05 11:00 (-0700), Nitan Kainth wrote:
>> Hi Experts,
>>
>> We found schema version mismatch in our cluster. We fixed it by bouncing C*
>> o
Hello, I'm working with an employer that is looking to hire someone to
become their lead on Apache Cassandra in the Netherlands.
Consequently I had hoped that some members of this mailing list may
like to discuss further off-list using "JamesBTobin (at) Gmail (dot)
com". Kind
networking in 2017.
128 GB is commonly used, but I would use 256+ GB in new servers.
I don't recommend the Cassandra JBOD configuration since losingone drive means
rebuilding the node immediately, which manyorganizations aren't responsive
enough to do.
Thanks, James.
--
Cassandra/MySQ
Nandan: The original Datastax training classes (when it was still called
Riptano)
used 3 virtualbox Debian instances to setup a Cassandra cluster. Thanks, James
Briggs.
--
Cassandra/MySQL DBA. Available in San Jose area or remote.
cass_top: https://github.com/jamesbriggs/cassandra-top
tException:
'Connection timed out (Connection timed out)'.
Any thoughts or how to log nodetool’s actions? Or see why it’s not accepting
the request? Telnet to the port from localhost as well as another node work
fine.
Thanks,
James
t thought is restart cassandra and monitor its log to make sure it
starts up.
On Thu, Jan 25, 2018 at 9:15 AM Jeff Jirsa
mailto:jji...@gmail.com>> wrote:
Can you telnet to the 7199 port?
--
Jeff Jirsa
On Jan 25, 2018, at 8:00 AM, James Lovato
mailto:james.lov...@iacapps.com>> wrote:
I h
exist.
Thanks for looking!
James
From: James Lovato
Reply-To: "user@cassandra.apache.org"
Date: Thursday, January 25, 2018 at 10:44 AM
To: "user@cassandra.apache.org"
Subject: Re: Nodetool hanging - Cassandra 3.10, Oracle Java 1.8.0_131
It starts up, I can telnet to the
i see leveled compaction used, if it's last, it will have to stay until
next level compaction happens, then will be gone, right ?
On Thu, Feb 1, 2018 at 2:33 AM, Bo Finnerup Madsen
wrote:
> Hi,
>
> We are running a small 9 node Cassandra v2.1.17 cluster. The cluster
> generally runs fine, but we
, in application coding, put timestamp >
expired time in where condition, so will not touch tombstones, in table
side, timestamp column in cluster key, with desc order, so better
performance.
James
On Thu, Feb 1, 2018 at 3:16 AM, Marcus Haarmann
wrote:
> Hi experts,
>
> I have a
Wow, an 84GB heap! Would you mind disclosing the kind of data requirements
behind this choice? And what kind of STW GC pauses do you see?
On Tue, Feb 13, 2018 at 10:06 AM, Thakrar, Jayesh <
jthak...@conversantmedia.com> wrote:
> In most cases, Cassandra is pretty efficient about memory usage.
Kenneth:
What you said is not wrong.
Vertica and Riak are examples of distributed databases that don't require
hand-holding.
Cassandra is for Java-programmer DIYers, or more often Datastax clients, at
this point.
Thanks, James.
From: Kenneth Brotman
To: user@cassandra.apache.or
wait long time for next compaction.
You may test ( sorry, not in my case, so I am not 100% sure)
1) if new cassandra 3.0, you may try nodetool compact -s ( it will split )
2) if old cassandra version, stop cassandra, use sstbalesplit
Hope it helps
Thanks,
James
On Fri, Mar 9, 2018 at 7:14
per my testing, repair not help.
repair build Merkle tree to compare data, it only write to a new file while
have difference, very very small file at the end (of course, means most
data are synced)
On Fri, Mar 9, 2018 at 10:31 PM, Madhu B wrote:
> Yasir,
> I think you need to run full repair in
de), read latency is 0.4 ms/op.
Of course, if cassandra used for reporting, that is different.
Thanks,
James
On Sat, Mar 10, 2018 at 7:55 AM, Rahul Singh
wrote:
> My 1.5T bound is for high throughput for read and write with hundreds of
> nodes — specifically with needs for quick bootstra
can try the Datastax Cassandra connector:
https://github.com/datastax/spark-cassandra-connector. This should let you run
Spark jobs using data to/from Cassandra.
Cheers,
James
Web: http://ferry.opencore.io
Twitter: @open_core_io
On Aug 30, 2014, at 4:02 PM, Adaryl Bob Wakefield, MBA
wrote
r data size is small compared to the disk size,
then it might be ok for you.
Thanks, James Briggs.
From: Chris Lohfink
To: user@cassandra.apache.org
Sent: Tuesday, September 9, 2014 12:14 PM
Subject: Re: Cassandra JBOD disk configuration
It can get really
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