I have cluster which is datastax-enterprise 4.8.2. Since "nodetool ugradesstables" commands takes too much time. I have an idea which is to add new datacenter of which version is 5.0.2. and remove the datacenter of which is 4.8.2. so I can start with fresh datacenter
Can I follow the idea?
Related
I'm trying to determine the correct upgrade process for a 3 node cluster running 9.x sitting behind a load balancer.
Looking at the cluster configuration we find :
Node 1 has forests and is the boot node ( likely the d-node ) and 300GB free.
Node 2 has no forests and has 700 GB free disk space ( likely an e-node ).
Node 3 has no forests and has 700 GB free disk space ( likely an e-node ).
Can I confirm that the correct cluster upgrade sequence from 9.x to 10.x Server is :
Shutdown node 3,2,1 ( in that order )
Deinstall converters then deinstall Server 9.x from Node 1
Deinstall converters then deinstall Server 9.x from Node 2 and Node 3
Install Server 10.x then install converters on Node 1 & restart Node 1
Install Server 10.x then install converters on Node 2 & 3 and restart both nodes.
Have I missed anything?
Is there anything I can look for on each node that tells me specifically that a node is an e-node or d-node?
Thanks.
Unless you are attempting to perform a rolling-upgrade (probably not necessary for a small 3-node cluster that only has one D-node), it is easiest to just shut them all down, uninstall the converters and MarkLogic, install the new version of server and converters, then start them all up and complete the upgrade in the Admin UI.
https://docs.marklogic.com/guide/installation/procedures#id_77358
Stop MarkLogic Server (as described in step 1 of Removing MarkLogic).
Uninstall the old MarkLogic 9 release (as described in Removing MarkLogic).
If you want to uninstall MarkLogic 9.0-4 or later, and if the converters package was previously installed with it, you will have to perform a two-step uninstall: first uninstall MarkLogic Converters and then uninstall MarkLogic Server. For more detail, see MarkLogic Converters Installation Changes Starting at Release 9.0-4 and Removing MarkLogic.
Install the new MarkLogic 10 release (as described in Installing MarkLogic).
If you want to install MarkLogic 9.0-4 or later, and you plan to use the converters package with it, you will have to perform a two-step installation: first install MarkLogic Server and then install MarkLogic Converters. For more detail, see MarkLogic Converters Installation Changes Starting at Release 9.0-4 and Installing MarkLogic.
Start MarkLogic Server (as described in Starting MarkLogic Server).
Open the Admin Interface in a browser (http://localhost:8001/).
When the Admin Interface prompts you to upgrade the databases and the configuration files, click the button to confirm the upgrade.
I'm starting to use redis for my applications as a cache backend and "shared memory" store.
I've asked the servers maintenance team to install Redis on our CentOS 6.5 production environments. From EPEL, the version is 2.4.10, which we hope will upgrade in the future. Also, on our internal registry, we have a 3.0.7 available. The maintenance team would prefer the EPEL version.
I'm not quite sure of the differences between the versions. I haven't found a document listing major changes from 2.x to 3.0. Are there major features/ performance improvements/bugfixes in 3.0 that I MUST have?
My first guess is that 2.4.10 would be sufficient enough for my needs.
The most significant change from 2.x to 3.0 is that Redis 3.0 introduces Redis Cluster which is a distributed implementation of Redis.
You can also get change list (bug fix, new features and so on) of other versions from 00-RELEASENOTES file of each version: github link:
i would like to install datastax 4.7.2 or the latest version on ec2 and take advantage of spark and mllib. Is there a recommended image that I can use to ssh into?
You can use the DataStax AMI. DSE is free in Dev or in Prod for qualifying startups.
Just get your credentials by filling out the download form.
I've installed redis-server using apt-get install redis-server and everything went fine.
Right now I'm trying to configure it in a Cluster mode. The problem is that in the tutorial supplied here http://redis.io/topics/cluster-tutorial they use a script called redis-trib.rb which I can't find it in my system.
Can you please tell me how can I configure my Redis to run in Cluster mode without that script ?
I would like to have a setup with two masters, each on a different machine.
Thank you very much.
Had same problem with reredis-trib.rb
This tutorial explains how to create Redis Cluster using only Redis commands: Configuring and Running Redis Cluster on Linux
You need Redis 3.0.0 beta to run Cluster. You'll not find it in a Linux distribution, since they all have copy of the stable server (fortunately!). Redis 3.0.0 will go out as a stable release the next week. You can find the source code of the stable release here: http://redis.io/download.
There is now a tutorial for Ubuntu at https://www.digitalocean.com/community/tutorials/how-to-configure-a-redis-cluster-on-ubuntu-14-04 which includes installation of a PPA to supply 3.0.x. This tutorial is only for two nodes and does not reference redis-trib.rb ...
3.9.71 is the latest BSD versionned version of ServiceStack.Redis.
But Redis goes on with BSD licenses.
There are merge required changes for redis (2.6.X -> 2.8.X)
https://raw.github.com/antirez/redis/2.8/00-RELEASENOTES
So the question: Could we upgrade Redis to 2.8.X without upgrading ServiceStack.Redis?
(Production environment)
Thanks