Re: Advice in upgrade plan from 1.2.18 to 2.2.8

Also before you get started. Make sure: 1) no one attempts to change schema during the process 2) no one attempts to run a repair 3) no one attempts to join a node 4) no one attempts to remove/move nodes from the cluster Each of these things trigger repair sessions and stream data which do not

Re: Advice in upgrade plan from 1.2.18 to 2.2.8

Thanks Alain. This was extremely helpful, really grateful. Aiman On Dec 22, 2016, at 5:00 AM, Alain RODRIGUEZ > wrote: Hi, Here are some thoughts: running 1.2.18. I plan to upgrade them to 2.2.latest Going 1 major release at the time is probably

Re: Cassandra cluster performance

Yes, there is definitely something wrong but I’m struggling to figure out what exactly. To answer your questions. - There are no errors in client or Cassandra - I tried manual inserts and there are no errors either, I set the tracing on so I can see that the data is

Re: Why does Cassandra recommends Oracle JVM instead of OpenJDK?

I would agree with Eric with his following statement. In fact, I was trying to say the same thing. "I don't really have any opinions on Oracle per say, but Cassandra is a Free Software project and I would prefer that we not depend on commercial software, (and that's kind of what we have here, an

Re: Openstack and Cassandra

Thanks for the info Aaron! I will test it in hope there will be no issues. If no issues will occur, this could actually be a good idea and would save a lot of resources. Have a great day! Shalom Sagges DBA T: +972-74-700-4035

Re: Openstack and Cassandra

Shalom, We (Target) have been challenged by our management team to leverage OpenStack whenever possible, and that includes Cassandra. I was against it at first, but we have done some stress testing with it and had application teams try it out. So far, there haven't been any issues. A good use

Re: Openstack and Cassandra

Thanks Vladimir! I guess I'll just have to deploy and continue from there. Shalom Sagges DBA T: +972-74-700-4035 We Create Meaningful Connections

Re: Not timing out some queries (Java driver)

The replication factor is the default - I haven't changed it. Would tweaking it help? On Thu, Dec 22, 2016 at 8:41 PM, Ali Akhtar wrote: > Vladimir, > > I'm receiving a batch of messages which are out of order, and I need to > process those messages in order. > > My

Re: Not timing out some queries (Java driver)

Vladimir, I'm receiving a batch of messages which are out of order, and I need to process those messages in order. My solution is to write them to a cassandra table first, where they'll be ordered by their timestamp. Then read them back from that table, knowing that they'll be ordered. But for

Re: Not timing out some queries (Java driver)

What is replication factor? Why not use CONSISTENCY QUORUM? It's faster and safe enough. Best regards, Vladimir Yudovin, Winguzone - Cloud Cassandra Hosting On Thu, 22 Dec 2016 10:14:14 -0500 Ali Akhtar ali.rac...@gmail.com wrote Is it possible to provide these options

Re: Openstack and Cassandra

Hi Shalom, I don't see any reason why it wouldn't work, but obviously, any resource sharing affects performance. You can expect less degradation with SSD disks, I guess. Best regards, Vladimir Yudovin, Winguzone - Cloud Cassandra Hosting On Wed, 21 Dec 2016 13:31:22 -0500

Re: Not timing out some queries (Java driver)

Is it possible to provide these options per query rather than set them globally? On Thu, Dec 22, 2016 at 7:15 AM, Voytek Jarnot wrote: > cassandra.yaml has various timeouts such as read_request_timeout, > range_request_timeout, write_request_timeout, etc. The driver

Re: Advice in upgrade plan from 1.2.18 to 2.2.8

Hi, Here are some thoughts: running 1.2.18. I plan to upgrade them to 2.2.latest > Going 1 major release at the time is probably the safest way to go indeed. >1. Install 2.0.latest on one node at a time, start and wait for it to >join the ring. >2. Run upgradesstables on this

Re: Why does Cassandra recommends Oracle JVM instead of OpenJDK?

Pretty much a non-story, it seems like. Clickbait imho. Search ‘The Register’ in this wikipedia page @Ben Manes Agreed, OpenJDK and Oracle JDK are now pretty close, but there is still some differences in the VM