slow ubuntu 18.4 vm in openstack - performance

I am completely new to openstack. I am having some problem. Googling about it didn't help me. I am doing a project on implementing a private cloud using Openstack.
I have deployed multinode openstack (xena) on centos 8 stream (one controller and two compute nodes).
windows vms work normally but when i installed ubuntu 18.4 vm ,it work slowly specially the graphic is so slow. any solutions please and thank you

Related

managing big .rda files in shiny server in an Amazon EC2

I'm using Shiny Server on an Amazon EC vm (4cpus 8gb of ram running ubuntu 16.04 LTS).
The problem I have is the following :
when I run my shiny App locally, everything is good, and I don't get any errors loading my 250MB .rda file. However, when run it on the Amazon instance, my app just disconnects after hitting the button that triggers the prediction using the model stored on my .rda file.
I tried a dummy model stored in a small (25MB) .rda file and the App worked correctly. So my question is, Does the free version of Shiny server have a limitation on the size of the files ? and if not, any workaround for this problem ?
EDIT: I tried the App on a VM with the same specs, but running ubuntu 14.04, I still have the same problem.

Ubuntu Reboot for elasticsearch

I have Ubuntu 12.04 server 64 bit on linode. I am using Elasticsearch as a service , rabbitmq , Celery .
The problem is after having my instance running for 4 months and 21 days suddenly elasticsearch failed to start. When I reboot the ubuntu it appears to be working correctly.
Now the question is , what is the standard interval/time to reboot a ubuntu server which is deployed in production ?
Should I also reboot the ubuntu after 4/5 months ? How the big production systems handle the maintenance.
If everything would work ok and you don't update any programs you would not need to reboot. So the advice is: analyze. Look in the logs.
I was like, when not enough memory in the jvm
Es configuration: http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/setup-configuration.html

How to Start working with Hadoop

Hi I want to learn Hadoop.I have basic idea on how hadoop works with MapReduce framework.
Now i want to practice on my local PC so i want to know how to install hadoop on single Node.
I installed VM Workstation 10 and i tried to install any Linux flavour Operating system to install Hadoop , but iam not able to load Ubuntu into VM ware Workstation ,iam getting error as Exiting intel ...,Operating Not found message.
Can any one please provide me steps on how to start with Hadoop installation.
Should i go for any Distributions(Cloudera,Hortonworks,MapR).If that is simple then tell me how to install those distributions.(I tried even with Cloudera importing vmware file into VMWare workstation it did not worked for me)
You can use the VM given by Udacity for its course on Hadoop. I found it really easy to set up.

Create a dev/test cloud on a box or two

So I have a similar question to Recommended setup for a "hom dev cloud"? I want to run VM's on an old desktop basically. Everything I've seen for installing EC2 eucalyptus or openstack has been on bare metal. I tried to install on ISO on a vm, but it wouldn't install to a VM. Is it possible to have test environment on one server where I can programmatically spin up vms as I would with a public cloud?
Thanks!
Since you are interested in deploying your cloud as a VM, you should also consider Apache Cloudstack. Have a look at DevCloud for a VM image.
It appears this will work for openstack http://devstack.org/guides/single-vm.html. Is there anything similar for ec2 eucalyptus?
For eucalyptus you could take a look at eucadev:
http://sigtt.in/articles/2013/11/25/introducing-eucadev/

How it the experience with new Amazon's Cluster GPU Instance of EC2?

Amazon released EC2 - Cluster GPU Instances and I wonder what's your experience with it? Is it stable, does it require a lot of time to install new drivers, SDK etc. before you deployed your CUDA code?
I haven't yet deployed a gpu instance, but I can tell you that the OS image already has the drivers setup for you.
Now in terms of installing CUDA, and getting your code ran thats anotother stody. If you haven't tried EC2 at all then I can tell you on a normal instance - I can install gcc/g++ and svn; setup a repository and have my code run in 5-10 minutes.
EDIT: I was looking through the documentation and found this: http://docs.amazonwebservices.com/AWSEC2/latest/UserGuide/Cluster_GPUs_Install_Driver.html#d0e18924 this talks about reinstalling or updating the NVIDIA drivers

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