Application would send request to one of the node(called as coordinating
node) & this coordinating node is aware of where your result
lies(considering you have modelled your DB correctly, it should not result
in scatter& gather kind of stuff) and thus delegate the query to respective
node, so it do
Hi,
I think LWT feature is introduced for your kind of usecases only - you
don't want other requests to be updating the same data at the same time
using Paxos algo(2 Phase commit).
So, IMO your usecase makes perfect sense to use LWT to avoid concurrent
updates.
If your issue is not the concurren
you have
> multiple concurrent requests across replicas last timestamp will win. You
> can get better isolation using LWT which uses paxos under the hood.
>
> On 16 May 2018 at 08:55, Rajesh Kishore wrote:
>
>> Hi,
>>
>> I am just curious to know when Cassandra doc sa
Hi,
I am just curious to know when Cassandra doc says the atomicity and
isolation is guaranteed for a row.
Does it mean, two requests updating a row- "R1" at different replica will
be candidate for atomicity and isolation?
For instance , I have a setup where RF is 2
I have a client application wh
e my
assumption is these operations would need to be atomic( and may be
supporting other ACID properties) . How these kind of operations/usecases
being handled in Cassandra/NoSQL world?
Appreciate your response.
Thanks,
Rajesh
On Thu, Apr 26, 2018 at 8:05 AM, Rajesh Kishore
wrote:
> Thanks Ben
pdates.
>
> Cheers
> Ben
>
> On Fri, 20 Apr 2018 at 15:21 Rajesh Kishore
> wrote:
>
>> Re-framing my question:
>>
>> So, it means that having different tables will not result into same
>> partition even though you have same partition key.
>> Ex.
&g
Yes that's also the way.
On Fri, 20 Apr 2018, 15:55 Ashutosh Kumar, wrote:
> Hi ,
> I am using python. Is capturing traffic using wireshark right way to know
> this?
> Thanks
> Ashutosh
>
> On Fri, Apr 20, 2018 at 11:11 AM Rajesh Kishore
> wrote:
>
>> If
If you are using java client , generally to find what is the protocol and
cipher used , you can configure -Djavax.net.debug=ssl for the java program.
You can configure this property either at server /client and redirect the
output to some file.
You will see message in ssl negotiation something like
f JDBC
try {
txn.start()
operation a
operation b
..
operation n
txn.commit();
} catch (Exception e)
{
txn.rollback()
}
Thanks in advance.
Regards,
Rajesh
On Fri, Apr 20, 2018 at 9:38 AM, Rajesh Kishore
wrote:
> So, it means that having different tables will not result into same
> parti
x BATCH and LWT on different tables/partitions.
>
>
>
> You can get more details here:
>
> http://cassandra.apache.org/doc/latest/cql/dml.html#batch
>
> https://inoio.de/blog/2016/01/13/cassandra-to-batch-or-not-to-batch/
>
> *--*
>
> *Jacques-Henri Berthemet*
9:10 AM
> *To:* user
> *Subject:* Re: Does Cassandra supports ACID txn
>
>
>
> No ACID transaction any soon in Cassandra
>
>
>
> On Thu, Apr 19, 2018 at 7:35 AM, Rajesh Kishore
> wrote:
>
> Hi,
>
> I am bit confused by reading different articles, does recent
Hi,
I am bit confused by reading different articles, does recent version of
Cassandra supports ACID transaction ?
I found BATCH command , but not sure if it supports rollback, consider that
transaction I am going to perform would be on single partition.
Also, what are the limitations if any?
Th
>
> --
> Rahul Singh
> rahul.si...@anant.us
>
> Anant Corporation
>
> On Feb 19, 2018, 11:31 AM -0500, Rajesh Kishore ,
> wrote:
>
> It can be minimum of 20 m to 10 billions
>
> With each entry can contain upto 100 columns
>
> Rajesh
>
> On 19 Feb 2018 9
On Feb 19, 2018, 3:44 AM -0500, Rajesh Kishore ,
wrote:
Hi All,
I am a newbie to Cassandra world, got some understanding of the product.
I have a application (which is kind of datastore) for other applications,
the user queries are not fixed i.e the queries can come with any attributes.
In this c
Hi All,
I am a newbie to Cassandra world, got some understanding of the product.
I have a application (which is kind of datastore) for other applications,
the user queries are not fixed i.e the queries can come with any attributes.
In this case, is it recommended to use cassandra ? What benefits w
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