RE: loosing data during saving data from java

Thank Jeff 🙂 but if you save several data to fast with cassandra repository and if cassandra doesn't have the same speed and inserts more slowly. What is the bevahior ? cassandra store the overflow in a additionnal buffer ? No data can be lost on the cassandra's side ? Thank a lot. Adrian

Re: Cassandra Repair question

Thanks Manish, What is the best and fastest way to repair a table using nodetool repair ? We are using 256 vnodes . On Fri, Oct 18, 2019 at 10:05 PM manish khandelwal < manishkhandelwa...@gmail.com> wrote: > No it will only cover primary ranges of nodes on single rac. Repair with > -pr option i

Re: Cassandra Repair question

No it will only cover primary ranges of nodes on single rac. Repair with -pr option is to be run on all nodes in a rolling manner. Regards Manish On 19 Oct 2019 10:03, "Krish Donald" wrote: > Hi Cassandra experts, > > > We are on Cassandra 3.11.1. > > We have to run repairs for a big cluster. >

Cassandra Repair question

Hi Cassandra experts, We are on Cassandra 3.11.1. We have to run repairs for a big cluster. We have 2 DCs. 3 RACs in each DC. Replication factor is 3 for each datacenter . So if I run repair on all nodes of a single RAC with "pr" option then ideally it will cover all the ranges. Please cor

GC Tuning https://thelastpickle.com/blog/2018/04/11/gc-tuning.html

Hello! Is it still better to use ParNew + CMS Is it still better than G1GC these days? Any recommendation for i3.xlarge nodes read-heavy workload? Thanks, Sergio - To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.or

Cassandra Recommended System Settings

Hello everyone! Do you have any setting that you would change or tweak from the below list? sudo cat /proc/4379/limits Limit Soft Limit Hard Limit Units Max cpu time unlimitedunlimitedseconds Max file size un

Re: loosing data during saving data from java

There is no buffer in cassandra that is known to (or suspected to) lose acknowledged writes if it's overwhelmed. There may be a client bug where you send so many async writes that they overwhelm a bounded queue, or otherwise get dropped or timeout, but those would be client bugs, and I'm not sure

loosing data during saving data from java

Hello all, I have a table cassandra where I insert quickly several java entity about 15.000 entries by minutes. But at the process ending, I only have for exemple 199.921 entries instead 312.212 If I truncate the table and relaunch the process, several time I get 199.354 or 189.012 entries ... not

Re: TWCS and gc_grace_seconds

Hi Adarsh, You will have problems if you manually delete data when using TWCS. To fully understand why, I recommend reading this The Last Pickle post: https://thelastpickle.com/blog/2016/12/08/TWCS-part1.html And this post I wrote that dives deeper into the problems with deletes: http://www.red

Re: TWCS and gc_grace_seconds

Thanks Jeff, I just checked with business and we have differences in having TTL. So it will be manula purging always. We do not want to use LCS due to high IOs. So: 1. As the use case is of time series data model, TWCS will be give some benefit (without TTL) and with frequent deleted data