Source)
at
javax.management.remote.rmi.RMIConnector$RemoteMBeanServerConnection.getAttribute(RMIConnector.java:901)
at
javax.management.MBeanServerInvocationHandler.invoke(MBeanServerInvocationHandler.java:280)
Any suggestions towards solving this problem would be deeply appreciated.
thanks,
rahul
--
63) for i in range(2)]'
>
> ** **
>
> which gives the following values:
>
> ['-9223372036854775808', '0']
>
> ** **
>
> *From:* Rahul [mailto:rahule...@gmail.com]
> *Sent:* Monday, April 29, 2013 7:23 PM
> *To:* user@cassan
continue.
It may be a very simple fix on their end to save from potential risks, extra
ongoing work, and bad practices. This kind of “system debt” catches up. Better
to nip it now.
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On Mar 14, 2018, 7:31 PM -0400, Madhu B , wrote:
> Thank
I think he just wants to delete the test table not the whole keyspace. Is that
correct?
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On Mar 19, 2018, 9:08 AM -0500, Chris Lohfink , wrote:
> No.
>
> Why do you want to? If you don't use tracing they will be empty, and if w
If its not on the same “cluster” and you are not using something like
OpsCenter, the snapshotted files will have a diferent schema UUID for each
entity. If you rename the files to have the matching UUID in the file names,
then you should be able to do what you are talking about.
On Mar 21, 2018
Execute ‘nodetool settraceprobability 0’ on all nodes. It does zero percentage
of he tracing.
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On Mar 22, 2018, 11:10 AM -0500, shalom sagges , wrote:
> Hi All,
>
> Is there a way to protect C* on the server side from tracing comm
which
will eventually get cleansed.
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On Mar 22, 2018, 2:19 PM -0500, Charulata Sharma (charshar)
, wrote:
> Hi,
> Wanted to know the community’s experiences and feedback on using Apache
> Spark to delete data from C* transactiona
really old data expire ..
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On Mar 23, 2018, 11:38 AM -0700, Charulata Sharma (charshar)
, wrote:
> Hi Rahul,
> Thanks for your answer. Why do you say that deleting from spark is
> not elegant?? This is the exact feedba
.
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On Mar 24, 2018, 5:38 AM -0700, Chandan Goel , wrote:
> Hi,
>
> Is the professional certification on Cassandra given by Datastax recognized ?
> Oreilly has stopped giving any certifications , it seems. Is there any other
> a
Yes you can have multiple entries from multiple disks. No guarantee as I can
see of even distribution. If you want even distribution there are better
mechanisms for this at the filesystem later.
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On Mar 27, 2018, 8:05 AM -0700, Venkata Hari
It may be that the wife partition is bombarded more than other partitions.
What’s your RF on that keyspace? If if it’s greater than 1 I’d expect other
nodes to get the same type of load.
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On Mar 27, 2018, 5:56 AM -0700, Kenneth Brotman
Is that an encryption related policy? If you can clarify — maybe able to get
better answers. There are products like Vormetrics (?) which can encrypt data
at rest.
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On Mar 29, 2018, 12:23 AM -0400, Sudhakar Ganesan ,
wrote:
> Hi,
>
Agree with Alain.
Remember that DSE is not Cassandra. It includes Cassandra, SolR, Spark, and
Graph. So if you run all of some , it’s more than just Cassandra.
OpsCenter is another thing altogether.
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On Apr 4, 2018, 5:42 AM -0400, Alain
Nothing a full repair won’t be able to fix.
On Apr 4, 2018, 7:32 AM -0400, Jürgen Albersdorfer
, wrote:
> Hi,
>
> I have an urgent Problem. - I will run out of disk space in near future.
> Largest Table is a Time-Series Table with TimeWindowCompactionStrategy (TWCS)
> and default_time_to_live =
That seems to be more of a network segmentation issue. Protect the other nodes
behind a firewall / security group. Each node in the different DCs would be
able to talk to each other but the user client machine can only access the
traffic only DC
--
Rahul Singh
rahul.si...@anant.us
Anant
Makes sense it takes a long time since it has to reconcile against replicas in
all DCs. I leverage commercial tools for production clusters, but I’m pretty
sure Reaper is the best open source option. Otherwise you’ll waste a lot of
time trying to figure it out own your own. No need to reinvent t
It’s good for a certification... there was a discussion in this list two weeks
ago on the same subject. Summary:
1. Yes it’s fine.
2. You need experience or talent to get hired.
3. Talent can be either proven experience or your activity on the Cassandra
project.
--
Rahul Singh
rahul.si
1. Make a new table with the same schema.
For each node
2. Shutdown node
3. Copy data from Source sstable dir to new sstable dir.
This will do what you want.
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On Apr 16, 2018, 4:21 PM -0500, Kyrylo Lebediev ,
wrote:
> Thanks, Ali.
>
It uses a “everywhere” replication strategy and its recommended to do all alter
/ create / drop statements with consistency level all — meaning it wouldn’t
make the change to the schema if the nodes are up.
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On Apr 17, 2018, 12:31 AM -0500
Did you look at the answer the guy gave?
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On Apr 17, 2018, 5:12 AM -0500, vishal1.sha...@ril.com, wrote:
> Dear Community,
>
> Can you please help in answering the question below:
>
> https://stackoverflow.com/questions/497
it
reinitialized the system.
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On Apr 17, 2018, 2:25 PM -0500, John Sanda , wrote:
> On a couple different occasions I have run into this exception at start up:
>
> Exception (org.apache.cassandra.exceptions.InvalidRequest
,
It should catch up but every now and then if the changes are too great, it’s
easier to run nodetool resetlocalschema
https://docs.datastax.com/en/cassandra/2.1/cassandra/tools/toolsResetLocalSchema.html
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On Apr 18, 2018, 1:17 AM -0500, Jinhua
data growth. What does your cfstats / tablestats day? Are you monitoring your
key tables data via cfstats metrics like SpaceUsedLive or SpaceUsedTotal. What
is your snapshottjng / backup process doing?
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On Apr 19, 2018, 7:01 AM -0500, horschi
Each table has a different Guid — doing a hard link may work as long as the
sstable dir’s guid is he same as the newly created table in the system schema.
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On Apr 19, 2018, 10:41 AM -0500, Kyrylo Lebediev ,
wrote:
> The table is too la
; and
> table_name='usr';
>
> id
> --
> ea2f6da0-f931-11e7-8224-43ca70555242
>
>
> Directory name:
> ./data/test/usr-ea2f6da0f93111e7822443ca70555242
>
> Correct?
>
> Regards,
> Kyrill
> From: Rahul Singh
&
Read repairs are one anti-entropy measure. Continuous repairs is another. If
you do repairs via Reaper or your own method it will resolve your discrepencies.
On Apr 21, 2018, 3:16 AM -0400, Grzegorz Pietrusza ,
wrote:
> Hi all
>
> I'm a bit confused with how read repair works in my case, which i
Zeppelin and Dbeaver EE are both good.
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On Apr 23, 2018, 12:53 AM -0400, Eunsu Kim , wrote:
> I am now writing dbeaver EE, but I’m waiting for TeamSQL (https://teamsql.io)
> to support cassandra.
>
> > On 23 Apr 2018, at 7:5
Schema column families is the most authoritative. You may have different data
directories.
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On Apr 27, 2018, 1:24 PM -0700, Carl Mueller ,
wrote:
> IN cases where a table was dropped and re-added, there are now two table
> directorie
and saved them
into Cassandra. I could then later get time aggregates and average times per
operation.
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On May 13, 2018, 4:14 PM -0500, Guillermo Ortiz , wrote:
> I'm using the driver from Cassandra-Spark, I would like to know if th
If the TTL actually reduces the key count , should. It’s possible to TTL a row
from a partition but not the whole partition. 1 key = 1 partition != 1 row != 1
cell
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On May 23, 2018, 6:07 AM -0500, Grzegorz Pietrusza ,
wrote:
> Hi
>
Good article about it on LI
https://www.linkedin.com/pulse/snap-cassandra-s3-tablesnap-vijaya-kumar-hosamani/
On May 25, 2018, 2:52 PM -0500, Joaquin Casares ,
wrote:
> Hello Aneesh,
>
> While this doesn't provide a GUI, tablesnap is a community tool that does a
> great job at handling backups:
Deletes create tombstones — not really something to consider. Better to add /
update or insert data and do a soft delete on old data and apply a TTL to
remove it at a future time.
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On May 27, 2018, 5:36 AM -0400, onmstester onmstester
> > My 2 cents, if you want to update some information just update it. There’s
> > no need to overthink it.
> >
> > Batches are good if they’re constrained to a single partition, not so hot
> > otherwise.
> >
> >
> > On Sun, May 27, 2018 a
DataStax services partner.
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On May 29, 2018, 4:01 AM -0400, Ben Slater , wrote:
> Hi Pranay
>
> We (Instaclustr) provide enterprise support for Cassandra
> (https://www.instaclustr.com/services/cassandra-support/) which may cover
&g
>From DS dox : "Do not use -pr with this option to repair only a local data
>center."
On Jun 8, 2018, 10:42 AM -0400, user@cassandra.apache.org, wrote:
>
> nodetool repair -pr
For no downtime and no lost data, I would make a new DC in the same cluster,
and wait for the data / MVs to stream over. Otherwise, the best way is to
snapshot everything and bring up the nodes all at once.
On Jun 14, 2018, 4:11 AM -0400, Christian Lorenz
, wrote:
> Hi,
>
> we need to move our e
How much daa do you have and what is the timeline? If you can manage with a
maintenance window the snapshot / move and restore method may be the fastest.
Streaming data can take a long time to sync two DCs if there is a lot of data.
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On Jun
application such as an event queue —
basically mitigates / hedged performance loss in doing LWT.
You can always use CQRS without LWT.
Rahul
On Jun 21, 2018, 4:38 AM -0400, Jacques-Henri Berthemet
, wrote:
> Hi,
>
> Another way would be to make your PK a clustering key with Id as PK and t
.
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On Jun 19, 2018, 12:39 PM -0400, Durity, Sean R ,
wrote:
> This sounds like a queue pattern, which is typically an anti-pattern for
> Cassandra. I would say that it is very difficult to get the access patterns,
> tombstones, and everyt
I’ve collected a bunch at http://leaves.anant.us/#!/?tag=cassandra,monitoring
I reommend Grafana / Prometheus if you don’t have DSE (which has OpsCenter)
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On Jun 19, 2018, 1:06 PM -0400, Romain Gérard , wrote:
> Hi Felipe,
>
> Yo
and at the same time add to the new one.
Rahul
On Jun 28, 2018, 9:03 AM -0500, Randy Lynn , wrote:
> I have a 6-node cluster I'm migrating to the new i3 types.
> But at the same time I want to migrate to a different AZ.
>
> What happens if I do the "running node replace method&
replicas in the
old DC. Then you can decommissioned.
This way you are hundred percent sure that you aren’t missing any new data. No
need for a DC to DC repair but a repair is always healthy.
Rahul
On Jun 28, 2018, 9:15 AM -0500, Randy Lynn , wrote:
> Already running with Ec2.
>
> My
When you run TPstats or Tablestats subcommands in nodetool you are actually
accessing data inside Cassandra via JMX.
You can start there at first.
Rahul
On Jun 28, 2018, 10:55 AM -0500, Thouraya TH , wrote:
> Hi,
>
> Please, how can check the health of my cluster / data center using
Totally agree. GPFS for the win. EC2 multi region snitch is an automation tool
like Ansible or Puppet. Unless you have two orders of magnitude more servers
than you do now, you don’t need it.
Rahul
On Jun 29, 2018, 6:18 AM -0400, kurt greaves , wrote:
> Yes. You would just end up with a r
/
This is a work in progress and I'll update this with screenshots as well as
with links from other contributors.
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
Kafka Connect.
Theoretically you should be able to use the Smart Cat Labs CDC Kafka producer
and then use that with Kafka Connect to write to else where.
Rahul
On Jul 3, 2018, 11:48 AM -0400, Joshua Galbraith
, wrote:
> There is more info and background context on CDC here:
>
Some of my links related to Kafka and Cassandra
http://leaves.anant.us/#!/leaf/10767?tag=cassandra,kafka
Rahul
On Jul 3, 2018, 11:48 AM -0400, Joshua Galbraith
, wrote:
> There is more info and background context on CDC here:
> https://issues.apache.org/jira/browse/CASSANDRA-8844
>
&
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, 2018, 2:45 PM -0500, rajpal reddy , wrote:
>
> we have Qualys security scan running causing the cpu spike. We are seeing the
> CPU spike only
turn on the new binaries,
one node at a time.
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On Jul 9, 2018, 6:35 PM -0500, rajpal reddy , wrote:
> We have our infrastructure in cloud so opted for adding new dc with tar.gz
> then removed the old dc with package installation
>
&
Nice find, Ben. I added this to my list of c* monitoring tools.
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On Jul 9, 2018, 8:20 PM -0500, rajpal reddy , wrote:
> Thanks Ben!. will look into it
> > On Jul 9, 2018, at 10:42 AM, Ben Bromhead wrote:
> >
> > Hi Rajp
the coordinator does the write management , I am expecting that
regardless of whether I'm doing a logged or unlogged batch, the trigger on
any given table will only be triggered once per mutated partition.
Is my assumption correct?
Rahul Singh
Chief Executive Officer | Internet Architecture
It’s likely that if you have server stability issues its because of data model
or compaction strategy configurations which lead to out of memory issues or
massive GC pauses. Rebooting wouldn’t solve those issues.
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On Jul 17, 2018, 7:28 AM
What’s the goal, Abdul? Is it for security reasons or for organizational
reasons. You could try prefixing / suffixing the keyspace names if its for
organizational reasons (For now) if you don’t want to do the manual management
of mounts as Anthony suggested .
--
Rahul Singh
rahul.si
less than your
shortest GC grace seconds.
So if you have a GC of 10 days, you want to complete your repairs in 9 days…
--
Rahul Singh
rahul.si...@anant.us
Anant Corporation
On Jul 16, 2018, 5:15 PM -0400, rajasekhar kommineni ,
wrote:
> Hello All,
>
>
> I have all cluster nodes i
You can make new clusters or you can isolate with datacenters that don’t have a
keyspace replicated.
On Jul 16, 2018, 10:41 AM -0400, Durity, Sean R ,
wrote:
> In most cases, we separate clusters by application. This does help with
> isolating problems. A bad query in one application won’t affec
~ 128GB. The
lowest I’ve gone is 16GB but that’s for dev purposes only.
--
Rahul Singh
rahul.si...@anant.us
https://www.anant.us/datastax
Anant Corporation
On Jul 17, 2018, 8:26 AM -0400, Vsevolod Filaretov ,
wrote:
> What are general community and/or your personal experience viewpoints
17, 2018, at 4:45 AM, Rahul Singh
> > wrote:
> >
> > Have you considered looking into reaper project — could save you time in
> > figuring out your own strategy.
> > https://github.com/thelastpickle/cassandra-reaper
> >
> > Otherwise you can always do a
heapspace, so unncessary GC pressure
even with G1GC … which has STW pauses … eventually.
Non-response was generally due to GC pauses… (considering that Data model was
good all around)
On Jul 17, 2018, 10:39 AM -0400, Vsevolod Filaretov ,
wrote:
> @Rahul Singh thank you for the answer!
>
>
acle now has a Datastax offering
3. Mesosphere offers supported versions of Cassandra and Datastax
4. Kubernetes and related purveyors use Cassandra as prime example as a part of
a Kubernetes backed cloud agnostic orchestration framework
5. What Alain mentioned earlier.
--
Rahul Singh
rahul.si...@
Do the same nodes reboot or is it arbitrary? I’m wondering if it’s an isolated
incident related to dat / traffic skew or could happen on any coordinator
Rahul
On Jul 26, 2018, 12:31 AM -0400, Jeff Jirsa , wrote:
> It’s a warning, but probably not causing you problems
>
> A 20kB batch
Few questions
What is your maximumcompactedbytes across the cluster for this table ?
What’s your TTL ?
What does your data model look like as in what’s your PK?
Rahul
On Jul 25, 2018, 1:07 PM -0400, James Shaw , wrote:
> nodetool compactionstats --- see compacting which table
> no
computing (e.g. Kafka, Spark, Akka, Kubernetes, etc.) .
I've got about ~120 or so resources organized in this Readme, and I have a
queue of another 100 or so. Please feel free to send me any focused Cassandra
blogs related to development, architecture, or devops.
Thanks,
Rahul Singh
Chi
What does “hash” Data look like?
Rahul
On Jul 24, 2018, 11:30 AM -0400, Arpan Khandelwal , wrote:
> I need to clone data from one keyspace to another keyspace.
> We do it by taking snapshot of keyspace1 and restoring in keyspace2 using
> sstableloader.
>
> Suppose we have follo
-spark-solr-performance/
I assembled that list recently — I would even add that getting system logs into
ELK or Splunk could also show some patterns otherwise not detected tailing and
gripping.
Rahul
On Jul 26, 2018, 10:20 AM -0400, R1 J1 , wrote:
> Thanks for your prompt replies. No the same n
://product.hubspot.com/blog/g1gc-fundamentals-lessons-from-taming-garbage-collection
Rahul
On Jul 26, 2018, 1:27 PM -0400, R1 J1 , wrote:
> Any one has tried to optimize or change cassandra-env.sh in an server
> installation to make it use more heap size for garbage collection ?
> Any ideas
a storage optimization problem - it’s a data architecture problem.
Rahul
On Jul 28, 2018, 3:11 AM -0400, onmstester onmstester ,
wrote:
> The current data model described as table name:
> ((partition_key),cluster_key),other_column1,other_column2,...
>
> user_by_name: ((time_bucket, u
Hello,
I'm trying to find a good document on to enable encryption for Apache
Cassandra (not on dse) tables and commilogs and store the keystore in kms
or vault. If any of you already configured please direct me to
documentation for it.
Hello,
Any one tried aws ec2 volume encryption for Cassandra instances?
On Tue, Jul 31, 2018, 12:25 PM Rahul Reddy wrote:
> Hello,
>
> I'm trying to find a good document on to enable encryption for Apache
> Cassandra (not on dse) tables and commilogs and store the keystore
;>
>>> On Wed, Aug 1, 2018 at 12:36 PM Jeff Jirsa wrote:
>>>
>>>> EBS encryption worked well on gp2 volumes (never tried it on any others)
>>>>
>>>> --
>>>> Jeff Jirsa
>>>>
>>>>
>>>> On Aug 1, 2018, at
Are you sure you don’t have an outside process that is doing an export , Spark
job, non AWS managed backup process ?
Is this network out from Cassandra or from the network?
Rahul
On Aug 7, 2018, 4:09 AM -0400, Behnam B.Marandi , wrote:
> Hi,
> I have a 3 node Cassandra cluster (version
need for multi-dc
global replication and redundancy not quite available at the same level of
uptime as in dist. Coaches like REDIS.
Rahul
On Aug 7, 2018, 1:19 AM -0400, kurt greaves , wrote:
> > Does Cassandra TTL out the hints after max_hint_window_in_ms? From my
> > understandin
think about leveraging Kafka as
the transport layer and using Kafka Connect. It brings other tooling to get
data into Cassandra from a variety of sources.
Rahul
On Aug 6, 2018, 3:16 PM -0400, srimugunthan dhandapani
, wrote:
> Hi all,
> We have data that gets filled into Hive/ presto eve
Are you loading using a batch process? What’s the frequency of the data Ingest
and does it have to very fast. If not too frequent and can be a little slower,
you may consider a higher consistency to ensure data is on replicas.
Rahul
On Aug 18, 2018, 2:29 AM -0700, Maxim Parkachov , wrote:
>
deleting and then loading? That’s the
only way you should see tombstones — or maybe you are setting nulls?
Rahul
On Aug 18, 2018, 11:16 PM -0700, Maxim Parkachov , wrote:
> Hi Rahul,
>
> I'm already using LOCAL_QUORUM in batch process and it runs every day. As far
> as I unders
se.
Thanks for the suggestion!
Rahul
On Aug 9, 2018, 3:55 AM -0500, Horia Mocioi , wrote:
> Hello Rahul,
>
> Great compilation of resources.
>
> Maybe add this one on the Blogs category? https://lostechies.com/ryansv
> ihla/tags
>
> This one is also quite
collocates with
C*) or DataStax (index in Solr collocated with C*)
I personally haven’t used SnappyData but that’s another Spark based DB that
could be leveraged for performance real-time queries on the OLTP side.
Rahul
On Aug 23, 2018, 2:48 AM -0500, Affan Syed , wrote:
> Hi,
>
> w
tombstones all the time because they don’t know
better.
Rahul
On Aug 23, 2018, 11:50 AM -0500, DuyHai Doan , wrote:
> As I used to tell some people, the day we make :
>
> 1. partition size unlimited, or at least huge partition easily manageable
> (compaction, repair, streaming, partitio
Agreed. If your data model is good and no major read latencies due to little or
no data skew, wide partitions, or tombstones, you can literally scale linearly.
You could also consider having a plan in which you ramp up as the traffic
increases.
Rahul Singh
Chief Executive Officer
m
David ,
What CL do you set when running this command?
Rahul Singh
Chief Executive Officer
m 202.905.2818
Anant Corporation
1010 Wisconsin Ave NW, Suite 250
Washington, D.C. 20007
We build and manage digital business technology platforms.
On Aug 14, 2018, 11:49 AM -0500, David Payne , wrote
What’s your goal? Just output the results and save as JSON?
There may be a better way to do what you want.
https://github.com/tenmax/cqlkit/blob/master/README.md
Rahul Singh
Chief Executive Officer
m 202.905.2818
Anant Corporation
1010 Wisconsin Ave NW, Suite 250
Washington, D.C. 20007
We
static column, since you cannot use a static column in
the table's primary key.
Rahul Singh
Chief Executive Officer
m 202.905.2818
Anant Corporation
1010 Wisconsin Ave NW, Suite 250
Washington, D.C. 20007
We build and manage digital business technology platforms.
On Aug 13, 2018, 7:42 AM
set a short TTL that you would have deleted and that will eventually clear our
data depending on the value you set. My suggestion for those cases where you
must do business rules deletions, use a continuous spark job / Spark streaming
on another DC to maintain data hygiene.
Rahul Singh
Chief
YugaByte is also another new dancer in the Cassandra dance. The data store is
based on RocksDB — and it’s written in C++. Although they ar wire compliant
with c* I’m pretty are everything under the hood is NOT a port like Scylla was
initially.
Rahul Singh
Chief Executive Officer
m 202.905.2818
one level deeper. Maybe it’s another compaction
strategy that evenly distributes data by either threshold of size or maintain a
certain number of sstables.
Don’t have any ideas yet on anything better than Merkle trees. Will get back to
you with ideas or code.
Good stuff.
Rahul
On Aug 24, 2018
Hello,
Has anyone done the dse cassandra stable/ commitlog tde encryption saving
the keys in kms or vault instead of kmip. If it's possible please do let me
know
This is a Cassandra user group — consider joining the Datastax Academy Slack
group and asking there.
Rahul Singh
Chief Executive Officer
m 202.905.2818
Anant Corporation
1010 Wisconsin Ave NW, Suite 250
Washington, D.C. 20007
We build and manage digital business technology platforms.
On Sep 4
providing.
Rahul Singh
Chief Executive Officer
m 202.905.2818
Anant Corporation
1010 Wisconsin Ave NW, Suite 250
Washington, D.C. 20007
We build and manage digital business technology platforms.
On Sep 5, 2018, 10:47 AM -0500, Jeff Jirsa , wrote:
> All of Sean's points are good, a
Look here for some “migration” or data modeling articles.
https://anant.github.io/awesome-cassandra/
Rahul Singh
Chief Executive Officer
m 202.905.2818
Anant Corporation
1010 Wisconsin Ave NW, Suite 250
Washington, D.C. 20007
We build and manage digital business technology platforms.
On Sep 5
you’ll want to do what Jon suggested and source the event from Kafka
for all subsequent processes rather than process in Cassandra and the create
the event in Kafka.
Rahul Singh
Chief Executive Officer
m 202.905.2818
Anant Corporation
1010 Wisconsin Ave NW, Suite 250
Washington, D.C. 20007
We
on both clusters / DBS.
All that means is that I need to sequence the change before it happens so I can
predictably ensure it’s Scheduled for write / Mutation. So I’m
Back to square one: having a definitive queue / ledger separate from the
individual commit log of the cluster.
Rahul Singh
Look into Kafka Connect. It does tracking internally in a topic. Works better
going from relational to Cassandra.
Still won’t fix your potential data model issue related to skew and wide
partitions.
Rahul Singh
Chief Executive Officer
m 202.905.2818
Anant Corporation
1010 Wisconsin Ave NW
. Have used it several times.
Cassandra is a great place to store data in transport.
Rahul
On Sep 10, 2018, 5:21 PM -0400, DuyHai Doan , wrote:
> Also using Calvin means having to implement a distributed monotonic sequence
> as a primitive, not trivial at all ...
>
> > On Mon, Se
What’s the RF for that data ? If you can manage downtime one node I’d recommend
just bringing it down, and then repairing after you delete the bad file and
bring it back up.
Rahul Singh
Chief Executive Officer
m 202.905.2818
Anant Corporation
1010 Wisconsin Ave NW, Suite 250
Washington, D.C
I think his question was related specifically to the system tables. KDM is a
good tool for designing the tables but not necessarily for viewing the system
tables.
Abdul, try out a tool called DB Schema Visualizer. It supports Cassandra
Rahul Singh
Chief Executive Officer
m 202.905.2818
Anant
Is there a reason why these versions are so different ? I would recommend
bringing 3.0.6 to 3.0.13 before doing cluster wise commands.
Rahul Singh
Chief Executive Officer
m 202.905.2818
Anant Corporation
1010 Wisconsin Ave NW, Suite 250
Washington, D.C. 20007
We build and manage digital
See inline
Rahul Singh
Chief Executive Officer
m 202.905.2818
Anant Corporation
1010 Wisconsin Ave NW, Suite 250
Washington, D.C. 20007
We build and manage digital business technology platforms.
On Dec 9, 2018, 2:02 PM -0500, Devaki, Srinivas , wrote:
> Hi Guys,
>
> Have a couple of
If you use collections such as a map you could get by with just
upserts. A collection in a column gives you the ability to have “flexible”
schema for your “documents” as in mongo while the regular fields can act as
“records” as in a more
Traditional table.
Rahul Singh
Chief Executive Officer
m
Agree with JEFF in twcs. Also look
At https://github.com/paradoxical-io/cassieq for reference. Good ideas for a
queue on Cassandra.
Rahul Singh
Chief Executive Officer
m 202.905.2818
Anant Corporation
1010 Wisconsin Ave NW, Suite 250
Washington, D.C. 20007
We build and manage digital business
Hello,
Is it possible to find subrange needed for repair in Apache Cassandra like
dse which uses dsetool list_subranges like below doc
https://docs.datastax.com/en/archived/datastax_enterprise/4.8/datastax_enterprise/srch/srchRepair.html?hl=repair
Hello,
I see maximum memory usage alerts in my system.log couple of times in a day
as INFO. So far I haven't seen any issue with db. Why those messages are
logged in system.log do we have any impact for reads/writes with those
warnings? And what nerd to be looked
INFO [RMI TCP Connection(170917)
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