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Re: Deployment

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

Re: how to avoid lightwieght transactions

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

Re: row level atomicity and isolation

uaranteed within a replica. If 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 <rajesh10si...@gmail.com> wrote: > >> Hi,

row level atomicity and isolation

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

Re: Does Cassandra supports ACID txn

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 <rajesh10si...@gm

Re: Does Cassandra supports ACID txn

rement for these type of batched > updates. > > Cheers > Ben > > On Fri, 20 Apr 2018 at 15:21 Rajesh Kishore <rajesh10si...@gmail.com> > wrote: > >> Re-framing my question: >> >> So, it means that having different tables will not result into same >

Re: How to know version of TLS being used

Yes that's also the way. On Fri, 20 Apr 2018, 15:55 Ashutosh Kumar, <ashutosh@gmail.com> 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 <ra

Re: How to know version of TLS being used

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

Re: Does Cassandra supports ACID txn

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 <rajesh10si...@gmail.com> wrote: > So, it means that having different tables will n

Re: Does Cassandra supports ACID txn

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*

Re: Does Cassandra supports ACID txn

> *To:* user <user@cassandra.apache.org> > *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 <rajesh10si...@gmail.com> > wrote: > > Hi, >

Does Cassandra supports ACID txn

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?

Re: newbie , to use cassandra when query is arbitrary?

itrary columns across those hundred. > > -- > Rahul Singh > rahul.si...@anant.us > > Anant Corporation > > On Feb 19, 2018, 11:31 AM -0500, Rajesh Kishore <rajesh10si...@gmail.com>, > wrote: > > It can be minimum of 20 m to 10 billions > > With each entry can

Re: newbie , to use cassandra when query is arbitrary?

l.si...@anant.us Anant Corporation On Feb 19, 2018, 3:44 AM -0500, Rajesh Kishore <rajesh10si...@gmail.com>, 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

newbie , to use cassandra when query is arbitrary?

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