RE: 回复:RE:_Why_suddenly_cassandra_3.11.4_and_3.11.3_“can_not_find_or_load_main_class_-ea”?

2019-12-25 Thread Dimo Velev
are sourcing in something from your user home directory which is broken (or your shell profile/rc) Original message From: "gloCalHelp.com" Date: 24/12/2019 09:39 (GMT+01:00) To: Dimo Velev Cc: user , dev-help Subject: 回复:RE:_Why_suddenly_cassandra_3.11.4_a

RE: Why suddenly cassandra 3.11.4 and 3.11.3 “can not find or load main class -ea”?

2019-12-24 Thread Dimo Velev
-ea is a jvm parameter to enable assertions. Maybe you are passing it at the wrong place and the jvm interprets it as class name that you want to start. Original message From: "gloCalHelp.com" Date: 24/12/2019 08:03 (GMT+01:00) To: user , dev-help , www_8ems_com Subject: Wh

Create table concurrently

2019-12-23 Thread Dimo Velev
Hi, We have microservices that use Cassandra. Each instance, when started, creates the required DB schema (and keeps a changelog). As instances can be started at the same time, we use a row in a table as lock - insert into if not exists using ttl. That all works without any issues.The problem is

Re: loading big amount of data to Cassandra

2019-08-03 Thread Dimo Velev
sstableloader (either use the utility or use the underlying classes to embed it in your program). > On 3. Aug 2019, at 07:17, Ayub M wrote: > > Dimo, how do you generate sstables? Do you mean load data locally on a > cassandra node and use sstableloader? > >> On Fri, Aug 2, 201

Re: loading big amount of data to Cassandra

2019-08-02 Thread Dimo Velev
Hi, Batches will actually slow down the process because they mean a different thing in C* - as you read they are just grouping changes together that you want executed atomically. Cassandra does not really have indices so that is different than a relational DB. However, after writing stuff to

Re: Get information about GC pause (Stop the world) via JMX, it's possible ?

2019-06-27 Thread Dimo Velev
That is s standard jvm metric. Connect to your cassandra node with a JMX browser (jconsole, jmc, ...) and browse the metrics. Depending on the garbage collector you use, they will be different but are there On Thu, 27 Jun 2019, 13:47 Ahmed Eljami, wrote: > Hi, > > I want to know if it's possible