Re: Testing Cassandra connectivity at application startup

diness check imo. > For the query why not select 1; ? > > -- > > Raphael Mazelier > > > On 25/08/2023 19:38, Shaurya Gupta wrote: > > Hi community > > We want to validate cassandra connectivity from the application container > when it starts up and before it

Testing Cassandra connectivity at application startup

her suggestions ? -- Shaurya Gupta

Re: Cassandra p95 latencies

back out? etc). All can play into >> this. >> >> On Fri, Aug 11, 2023, at 3:40 PM, Jeff Jirsa wrote: >> >> You’re going to have to help us help you >> >> 4.0 is pretty widely deployed. I’m not aware of a perf regression >> >> Can you give us a s

Re: Cassandra p95 latencies

ld not be a problem if rightly designed. Levelled compaction > strategy further reduces this, however it consume some resources. For read, > caching is also helpful. > Can you check your cpu iowait as it could be the reason for delay > > Regards, > Ashish > > On Fri, 11

Cassandra p95 latencies

observe those to be 40 ms P95 Reads and same for Writes. This looks very high as compared to what we expected. We are using Cassandra 4.0. Any documentation / numbers will be helpful. Thanks -- Shaurya Gupta

native_transport_port_ssl and native_transport_port

is it possible that the configs got applied even before a single cassandra node was restarted ? Thanks Shaurya -- Shaurya Gupta

Reactive DSE Java Driver seeing high response times from Cassandra

milliseconds. The CPU consumed by the container is just 35% of available. Can someone help with this ? Thanks -- Shaurya Gupta

Re: Enabling SSL on a live cluster

t; https://issues.apache.org/jira/browse/CASSANDRA-10404 > > By Any chance, did you try to enable internode encryption in 3.x > without downtime and were successful? Can you please confirm. > Best Regards, > Kiran.M.K. > > > On Wed, Nov 10, 2021 at 12:04 PM Tolbert, Andy

Re: Enabling SSL on a live cluster

Thanks Andy! It was very helpful. On Wed, Nov 10, 2021 at 12:04 PM Tolbert, Andy wrote: > Hi Shaurya, > > On Tue, Nov 9, 2021 at 11:57 PM Shaurya Gupta > wrote: > >> Hi, >> >> We want to enable node-to-node SSL on a live cluster. Could it be done >> with

Enabling SSL on a live cluster

Hi, We want to enable node-to-node SSL on a live cluster. Could it be done without any down time ? Would the nodes which have been restarted be able to communicate with the nodes which have not yet come up and vice versa ? Regards -- Shaurya Gupta

Re: Adding new DC

sAddDCToCluster.html. > Cheers! > -- Shaurya Gupta

Adding new DC

seed list from DC2 (node booted in previous step) & DC1. 3. Change of RFs of required keyspaces in DC1 to mention DC2. If someone could point to some already available documentation then that would be great too. -- Shaurya Gupta

Re: Number of DCs in Cassandra

f data, which is going to overwhelm it when it > streams and compacts. CASSANDRA-3200 helps this in 4.0, and incremental > repair helps this if you're running incremental repair (again, probably > after CASSANDRA-9143 in 4.0), but the naive approach can lead to really bad > surprises. &g

Re: Number of DCs in Cassandra

center, you have 3 copies of data. > If you have 3 DCs, means 9 copies of data. > Think about space wasted, Network bandwidth wasted for number of copies. > BTW, Ours just 2 DCs for regional DR. > > Thanks, > Jim > > On Wed, Jul 14, 2021 at 2:27 AM Shaurya Gupta &

Re: Number of DCs in Cassandra

on all the data > centers. > > > On Wed, Jul 14, 2021 at 12:03 PM Shaurya Gupta > wrote: > >> Hi >> >> Does someone have any suggestions on the maximum number of Data Centers >> which NetworkTopology strategy can have for a keyspace. Not only >> techn

Number of DCs in Cassandra

Hi Does someone have any suggestions on the maximum number of Data Centers which NetworkTopology strategy can have for a keyspace. Not only technically but considering performance as well. In each Data Center RF is 3. Thanks! -- Shaurya Gupta

UDTs with LWT

-+--- *123* | *Ashish* | *[{**house_no**: **123**, **name**: **'ashish'**, **city**: **'patna'**, **pin: 246746**}, {**house_no**: **544**, **name**: * *'ashish'**, **city**: **'california'**, **pin**: **2019**}, {**house_no**: **124**, **name**: **'rana'**, **city**: **'delhi'**, **pin**: **2020**}]* | *2500* *and this should happen atomically.* Thanks! -- Shaurya Gupta

Point in time restore not working when primary key is blob

hanks -- Shaurya Gupta

UNLOGGED BATCH for same partition key but across tables

case however for isolation (updates to different column families are not isolated) " *Though it is for Cassandra 1.1 but, is this still true and is this also true for unlogged batch operations?* -- Shaurya Gupta

Re: Mixing LWT and normal operations for a partition

elect * from demo.tweets; *id* | *body* | *latitude* | *longitude* | *time* | *user* +--+--+---+--+-- (0 rows) Thanks Shaurya On Fri, May 3, 2019 at 1:02 AM Shaurya Gupta wrote: > One suggestion - I think Cassandra community is already having a drive

Re: Mixing LWT and normal operations for a partition

One suggestion - I think Cassandra community is already having a drive to update the documentation. This could be added to CQLSH documentation or some other relevant documentation. On Fri, May 3, 2019 at 12:56 AM Shaurya Gupta wrote: > Thanks Jeff. > > On Fri, May 3, 2019 at 12:38 AM J

Re: Mixing LWT and normal operations for a partition

Thanks Jeff. On Fri, May 3, 2019 at 12:38 AM Jeff Jirsa wrote: > No. Don’t mix LWT and normal writes. > > -- > Jeff Jirsa > > > > On May 2, 2019, at 11:43 AM, Shaurya Gupta > wrote: > > > > Hi, > > > > We are seeing really odd behaviour while

Mixing LWT and normal operations for a partition

Hi, We are seeing really odd behaviour while try to delete a row which is simultaneously being updated in a light weight transaction. The delete command succeeds and the LWT update fails with timeout exception but still the next select statement shows that the row still exists. This occurs ones in

Re: Cassandra upsert ordering issue for list type fields

gt; Lastname: pitt| dicaprio | Mcconahey | Beckinsale | Green > > ... would have been completely acceptable provided the fact I will > retrieve them by using the indedx [0] would mean brad pitt and [1] would > mean leonardo dicaprio in my applications > But the same indexed based retrieval would fail in case 2 where [0] would > mean leonardo pitt and [1] would mean brad dicaprio. > > Please help with any insights, I would be really grateful. > -- Shaurya Gupta

Re: [EXTERNAL] Re: Caused by: com.datastax.driver.core.exceptions.ReadTimeoutException:

As already mentioned in this thread, ALLOW FILTERING should be avoided in any scenario. It seems to work in test scenarios, but as soon as the data increases to certain size(a few MBs), it starts failing miserably and fails almost always. Thanks Shaurya On Wed, Apr 17, 2019, 6:44 PM Durity, Sea

Re: Apache Cassandra meetup @ Instagram HQ

eresting talks on Cassandra Traffic management, > Cassandra on Kubernetes. See details in the attached link - > > > https://www.eventbrite.com/e/cassandra-traffic-management-at-instagram-cassandra-and-k8s-with-instaclustr-tickets-54986803008 > > Thanks, > > Dinesh > -- Shaurya Gupta

Re: request_scheduler functionalities for CQL Native Transport

you > propose has been discussed in the past and it is something that is > currently unsupported. > > Dinesh > > > On Tuesday, November 27, 2018, 11:05:32 PM PST, Shaurya Gupta < > shaurya.n...@gmail.com> wrote: > > > Hi, > > We want to throttle maxim

request_scheduler functionalities for CQL Native Transport

. If not is there any plan to do so in future. It is a must have feature if we want to support multiple teams on a single cassandra cluster or to prevent one keyspace from interfering with the performance of the other keyspaces. Regards Shaurya Gupta