03-25-2024
abbala
SAS Employee
Member since
05-21-2019
- 6 Posts
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Latest posts by abbala
Subject Views Posted 6495 08-19-2022 11:18 AM 2882 07-28-2022 02:42 PM 2959 07-27-2022 10:12 AM 4253 04-30-2021 11:36 AM 422 04-19-2021 11:59 AM 1129 04-19-2021 11:57 AM -
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- Liked 2024 Customer Awards: MedImpact Healthcare Systems Inc.("Medimpact") - Innovative Problem Solver for maleman. 01-23-2024 10:17 AM
- Got a Like for “Ask the Expert” webinar on August 4th, The Basics of SAS® Viya®4 Administration. 09-09-2022 07:27 AM
- Got a Like for Re: “Ask the Expert” webinar on August 4th, The Basics of SAS® Viya®4 Administration. 08-22-2022 08:44 AM
- Posted The Basics of SAS® Viya®4 Administration Q&A, Slides, and On-Demand Recording on Ask the Expert. 08-19-2022 11:18 AM
- Posted Re: “Ask the Expert” webinar on August 4th, The Basics of SAS® Viya®4 Administration on Administration and Deployment. 07-28-2022 02:42 PM
- Got a Like for “Ask the Expert” webinar on August 4th, The Basics of SAS® Viya®4 Administration. 07-27-2022 06:54 PM
- Posted “Ask the Expert” webinar on August 4th, The Basics of SAS® Viya®4 Administration on Administration and Deployment. 07-27-2022 10:12 AM
- Liked Take the Low Code / No Code SAS Studio plunge! for TedStolarczyk. 02-04-2022 10:31 AM
- Liked SAS® Viya® 3.5 and SAS® Viya® 4: A Side-by-Side Comparison for CVitron. 07-27-2021 12:12 PM
- Posted What Do I Need to Know About SAS® Viya® Security? Q&A, Slides, and On-Demand Recording on Ask the Expert. 04-30-2021 11:36 AM
- Got a Like for “Ask the Expert” webinar on April 29th, What Do I Need to Know About SAS Viya Security?. 04-19-2021 06:10 PM
- Posted “Ask the Expert” webinar on April 29th, What Do I Need to Know About SAS Viya Security? on SAS Viya. 04-19-2021 11:59 AM
- Posted “Ask the Expert” webinar on April 29th, What Do I Need to Know About SAS Viya Security? on Administration and Deployment. 04-19-2021 11:57 AM
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08-19-2022
11:18 AM
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Watch this Ask the Expert session for an overview of SAS Viya 4 architecture, the Kubernetes method, and how Viya 4 is different from the previous releases of SAS.
Watch the Webinar
You will learn:
IT skills required for Viya 4 administration.
The basics of containers and Kubernetes.
About Viya 4 deployments.
Logging and monitoring.
Stopping and starting.
The questions from the Q&A segment held at the end of the webinar are listed below and the slides from the webinar are attached.
Q&A
You mentioned Viya 4 can scale up and down. Are you saying Viya 4 can increase or reduce the number CAS worker nodes?
Yes, it can do that.
Seems like the deployment will be way easier in the future?
Yes, deployment is going to be much easier compared to the previous releases of SAS. Now that we have this infrastructure as a code concept, all you must do is just go through that code and you can run that code and the code will take care of all the deployment from scratch for you. I have seen a best case scenario of installing. Deploying Viya 4 through this infrastructure code methodology, I was able to do it in less than 4 hours. That's the best case scenario.
So, never edit the red block, always the green customizations file?
You're talking about the site dot YAML file. Yes, I never tried to edit this site. If you are making any customizations, you should go through that flow chart that I talked about.
Can SAS 9.4 code still work in Viya 4?
Absolutely, just as moving from one server to another, make sure to check any libnames and filenames, changing them as appropriate to match the new locations in your SAS Viya environment. This code will execute on the SAS Compute Server in SAS Viya.
Is SAS Viya only served as Docker images?
I believe so, we ship the install media in the form of Docker Container Image.
Do you need to have a cloud provider (e.g. AWS) to install, administer, and run Viya 4 or can you run it on in-house Linux servers?
If you are not able to use the public cloud, SAS Viya supports deploying on Openshift on VMware giving you an On-Premises deployment option. Please refer to this webinar for more information https://www.sas.com/en_us/webinars/deploy-sas-viya-on-premises.html
What is the level of Terraform knowledge required for Viya 4 implementation?
Terraform skills will definitely help during the Viya 4 implementation, especially if you are taking Infrastructure as Code route. Check the Github projects:
https://github.com/sassoftware/viya4-iac-azure
https://github.com/sassoftware/viya4-iac-aws
Is SAS Viya 4 the only option for SAS 9 users in the future? I heard there is no maintenance release after SAS 9.4 M8? Is that correct?
SAS Viya is a reflection of the latest advances in technology and customer demand for cloud computing. SAS 9.4 will continue to be supported for a few years. Please check SAS Technical Support website to see the support level for all SAS releases.
https://support.sas.com/en/technical-support/services-policies.html#non-current
Can we continue to use the previous version of Viya? Will the non-cloud version of Viya continue to be supported and updated?
Whenever possible, we encourage our customers to run on the most recent release that is practical for them. It’s an exciting time to be running on Viya 4 because new capabilities are released every month on Viya 4. Please check SAS Technical Support website to see the support level for all SAS releases.
https://support.sas.com/en/technical-support/services-policies.html#non-current
I am a SAS 9.4 administrator. If I must work and learn Viya, can I start directly with Viya 4?
Yes, you can start with Viya 4. Please check SAS education website for recommended training: https://support.sas.com/edu/schedules.html?crs=SVF&ctry=US
Can you tell me about the differences between Visual Analytics and SAS Viya?
SAS Viya 4 is our first fully cloud-native platform. And SAS Visual Analytics is a software product that provides a complete platform for analytics visualizations. It runs on both SAS 9.4 and SAS Viya. For more details on SAS Visual Analytics, please visit https://www.sas.com/en_us/software/visual-analytics.html.
Can we switch back and forth between Stable and LTS versions?
Customers can change between cadences as long as the version that they are changing to is at the same version or newer than the installed version from their current cadence. For more details please see https://support.sas.com/en/technical-support/services-policies.html#cadence
What do you mean by container vs what was on Visual Analytics?
A container is a standard unit of software that packages up code and all its dependencies so the application runs quickly and reliably from one computing environment to another.
SAS Visual Analytics like all Viya 4 software, can be deployed in a container.
What is YAML in Viya 4?
Viya 4 runs on Kubernetes.
YAML for Kubernetes: Kubernetes works based on defined state and actual state. Kubernetes objects represent the state of a cluster and tell Kubernetes what you want the workload to look like. Kubernetes resources, such as pods, objects, and deployments can be created using YAML files.
What do SAS Grid installations have in common with SAS Viya?
The installation of the software is very different, however many of the features of SAS Grid workload management are available using SAS Workload Management of SAS Viya 4.
Is Viya a replacement for SAS EBI?
SAS Visual Analytics on SAS Viya has very robust capabilities for exploratory data analysis, reporting, dashboarding and analytics and it is designed to work with large data, leveraging the high performance capabilities of SAs Viya. For more information, please visit https://www.sas.com/en_us/software/visual-analytics.html
Is there metadata concept or infrastructure data server concept in Viya 4?
While there will be familiar concepts like User Management and Permissions, there is no metadata server per se.
Is there a concept of SMP and MPP in Viya 4?
Yes, the concept of Symmetric Multiprocessing and Massively Parallel Processing modes of CAS exists in Viya 4 as well.
If everything is processed in in-memory, do we need more RAM for each SAS Viya machine to host pods?
The more RAM the better always, please check the Hardware and Resource Requirements for Viya 4 here: https://go.documentation.sas.com/doc/en/itopscdc/v_030/itopssr/n0ampbltwqgkjkn1j3qogztsbbu0.htm
What Microsoft course would you suggest for Viya 4?
If your organization is using Microsoft Azure as your cloud provider, tasking the Azure Fundamental Course would be a recommendation.
What are SAS cache server and SAS Message Broker job in the SAS Viya 4 environment?
SAS Cache Locator and SAS Cache Server provide a distributed cache technology to microservices in SAS Viya.
The SAS Message Broker processes messages between SAS Viya services, routing these messages through exchanges and queues. Message Queues allow services to report on activity and allow other services to monitor the activity.
For the new architecture, how do you suggest setting up a dev versus prod environment? For example, for now, we have a machine for prod and another for dev, is this still the case or can all this be on one machine? What is the best practice?
You can create individual namespaces within your Kubernetes cluster and logically separate them. Please reach out to your SAS account team to learn more about the options that may be best for your organization.
What does SAS ESP do in Viya 4?
SAS Event Stream Processing enables you to analyze streaming data, uncover hidden insights with AI and make real-time, intelligent decisions in the environment of your choice. https://support.sas.com/en/software/event-stream-processing-support.html
In what ways is Viya not backward-compatible with SAS 9.4?
Viya 4 is an all new, fully cloud-ready architecture with a substantial set of new capabilities that grows with every release. While code written for SAS 9.4 can execute in SAS Viya (once libnames and filenames are modified as appropriate), the reverse is not likely because there are several new SAS procedures and algorithms (and even an additional language) which are not part of SAS 9.4. Here is a technical paper to see the capabilities present in both SAS 9.4 and SAS Viya Functional Comparison
(red block = site.yml)?
Yes
Do we need a new contract for SAS Viya 4 or will it be an auto upgrade from 3.x to 4?
Your SAS Customer Success Manager or your SAS Account Executive should be able to assist you in this process.
How is are CAS engine and ESP engine different? What different applications use those engines?
Cloud Analytic Services (CAS) is the main (in-memory, distributed) analytics engine in SAS Viya.
ESP - SAS Event Stream Processing analyzes streaming data and takes appropriate action instantly.
SAS now only provides Viya 3.5 training right?
SAS Education providers training for all supported releases of SAS. https://support.sas.com/edu/schedules.html?crs=SVF&ctry=US
What are the challenges of moving from SAS 3.x to SAS 4
For the functional users there are minimal impacts because the concepts and interfaces are largely the same, with new capabilities being added with every release. However, for the SAS administrators who support Viya 4, which runs on Kubernetes, we highly recommend administrators learn the Kubernetes way of doing things.
Will on premise LDAP / Active Directory authentication be available for Viya 4?
SAS Viya is configured by default to use Lightweight Directory Access Protocol (LDAP). As an alternative, you can change the configuration to use System for Cross-domain Identity Management (SCIM). LDAP must be disabled if SCIM is selected. More details can be found here: https://go.documentation.sas.com/doc/en/calids/v_001/p0vf7jxazgusirn1gd0jsd6teq3o.htm
Does SAS provide any documents for SAS Viya 4?
Yes, please refer SAS Help Center: Welcome to SAS Viya Administration which provides all the documentation.
Can the number of nodes be automatically scaled based on the load on the SAS environment?
Yes, Kubernetes has this feature called Auto scaling and it can scale up the resources based on need. Learn more about it here: https://kubernetes.io/blog/2016/07/autoscaling-in-kubernetes/
Are there any license implications when scaling your SAS environment?
Please reach out to your Account Executive so they can provide details about your specific account.
Do we have recorded versions of SAS Viya 4 deployment for AWS/Azure which can be shared with SAS partners?
We do offer workshops for customers and partners on Viya 4 deployments that have slides and recordings, as well as hands-on exercises to deploy SAS Viya 4. Please check with your SAS Customer Success Manager for more details.
Will Viya be available as Software as a Service?
We plan to offer more true SaaS offerings. Here is what we currently offer: https://www.sas.com/en_us/solutions/cloud/sas-cloud/saas.html
Is SAS Enterprise Miner available on SAS Viya?
SAS Enterprise Miner is a SAS 9 product; similar capabilities (and more!) are available in SAS Visual Data Mining and Machine Learning on Viya. You can learn more about it here: https://www.sas.com/en_us/software/visual-data-mining-machine-learning.html
If you have models built in SAS 9.4 that you’d like to move to SAS Viya, please check this informative webinar: https://www.sas.com/en_us/webinars/enterprise-miner-to-viya.html
Does Hotfix in Viya 4 involve downtime like other SAS versions?
Please find the details of how to update the software here: https://go.documentation.sas.com/doc/en/sasadmincdc/v_025/k8sag/p0hm2t63wm8qcqn1iqs6y8vw8y81.htm
Do the Viya 4 admin courses go through deployment labs/examples?
This course is a four-day immersion into a SAS Viya environment. This course provides essential topics for SAS Viya administration and demonstrates how to perform administration tasks using SAS Environment Manager, the command-line interface, and basic Kubernetes commands to administer a SAS Viya Environment.
https://support.sas.com/edu/schedules.html?crs=SVF&ctry=US
Is "VLE Courses on Viya4" available for external clients or only for SAS employees?
SAS Viya 4 customers receive an enablement portal with many learning assets to get started – this is included in their license. It contains courses in a Virtual Learning Environment (VLE) as well as several on-demand assets. Please contact your SAS Customer Success Manager for more information.
Is the "Viya Fast track course" available for external clients?
Yes, it is available for all clients, please check with your SAS Customer Success Manager for more details. Also please check this link for more information: https://support.sas.com/edu/schedules.html?crs=SVF&ctry=US
In the past, we were told that CAS could spin up additional containers upon high demand for in-memory storage but that these containers could not be removed easily when demand is reduced. Has this changed? More generally, how are varied in-memory (and cas_disk_cache) demands handled in current state for Viya 4?
CAS does not yet automatically scale workers based on utilization. It is currently up to an administrator to modify CAS topology manually or by way of scripting the necessary changes.
Can you provide an example workflow for the open-source container updates? For example, adding new Python libraries necessitates building a new image and deploying. Is there a simpler way to do this in Viya 4?
The workflow would be this:
(This is only done once) Copy $deploy/sas-bases/examples/sas-pyconfig/change-configuration.yaml to $deploy/site-config/sas-pyconfig
Add -site-config/sas-pyconfig/change-configuration.yaml to your kustomization.yaml
Edit $deploy/site-config/sas-pyconfig/change-configuration.yaml at line #26 to include the Python libraries you want
Rebuild site.yaml and apply to the cluster.
This will update sas-pyconfig which will kick off a job that updates the PVC with the requested python libraries.
After the initial configuration, steps 1-2 would be repeated each time a library change was needed.
Documentation link: SAS Help Center: Requirements for Optional Features (https://go.documentation.sas.com/doc/en/sasadmincdc/v_030/itopssr/p1n66p7u2cm8fjn13yeggzbxcqqg.htm#p19cpvrrjw3lurn135ih46tjm7oi )
Is it still true that it is not recommended to spread services (or pods/containers) across availability zones for latency concerns or is that specifically from a regional zone standpoint outside the zone envelope?
Correct. SAS has work in progress to test this type of distributed deployment but as yet, this is not a recommended configuration.
Any performance (large analytics workload) benchmark between Viya 3.5 and 4? Can you share any numbers?
Yes! We have a dedicated team of developers, who are refactoring algorithms to take fuller advantage of the SAS Viya architecture.
Our company is considering using Viya to host the SAS AML 8.3 application. How does that application fit into Viya? In 9.4 it is a Web Application. Is this the same in Viya?
SAS AML 8.3 is a solution that runs on SAS Viya. All interfaces in Viya are Web based. Please check the following links for more details:
https://support.sas.com/en/software/sas-anti-money-laundering-support.html
https://video.sas.com/category/videos/sas-anti-money-laundering
Recommended Resources
SAS® Viya® Administration Fast Track
What Do I Need to Know About Kubernetes for Administering SAS® Viya®?
How Are SAS®9 and SAS® Viya® Administration Different?
Kubernetes Tutorial
Moving from SAS9 to SAS Viya
Please see additional resources in the attached slide deck.
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07-28-2022
02:42 PM
1 Like
Q: Is cas duplicating the tables on every node?
A: CAS partitons the data to spread is across CAS nodes. By default, it makes a single replicate copy, also partitioned across the nodes, such that each node would have two unique partitions. If a CAS node were to go down, this allows processing on the data to continue, because a copy of that CAS node’s data partition would be located on another node. The number of replicate copies is configurable using the copies= option on the LOAD statement of PROC CASUTIL.
Q: Is cas when loading to memory using also cas cache because the extension is different than SAShdat?
A: The way that the SAS Viya Cloud Analytic Services (CAS) Server manages data in memory is a complicated topic – the two links below are handy references. In general, for *.sas7bat, cas-cache will be used.
4 Rules to Understand CAS Management of In-Memory Data
Directing CAS when to use its cache (or not)
Loading Data Using Graphical User Interface
The easiest way to load files that are already in a caslib is within the GUI. Use the Manage Data option in the application menu.
Navigate to Data Sources and then to the CASLIB of interest.
Click on the table that is to be loaded into CAS and click the lightning bolt in the upper right hand corner.
Loading Data Using SAS Code
If SAS code is a preference, below is an example that demonstrates loading a sas7bdat file to a CAS library and promoting it so that it is available to other CAS sessions, while also controlling the number of replicate copies (default is copies=1).
* Start a CAS session called mySession;
cas mySession sessopts=(caslib=casuser timeout=1800 locale="en_US" );
*Generate SAS librefs for caslibs;
caslib _all_ assign;
*Define a SAS libref where files SAS datasets are stored;
libname mydata "/nfs/Data/";
*load to CAS (CASUSER or other CASLIB) and promote;
proc casutil;
load data=mydata.modeldata
outcaslib="CASUSER"
casout="ModelData" promote copies=1;
run;
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07-27-2022
10:12 AM
2 Likes
Hello SAS Admins:
I’m presenting a live “Ask the Expert” webinar on August 4 th , 11 AM – Noon ET entitled The Basics of SAS® Viya®4 Administration. I’ll cover the SAS Viya 4 architecture, the Kubernetes method, and how Viya 4 is different from previous releases of SAS. I’ll also demonstrate the key concepts for successfully administering Viya 4. Bring your questions. I’ll host a live Q&A session at the end of the webinar.
You will learn:
IT skills required for Viya 4 administration.
The basics of containers and Kubernetes.
About Viya 4 deployments.
Logging and monitoring.
Stopping and starting.
Reserve your spot for the webinar.
Want more tips? Be sure to subscribe to the Ask the Expert board to receive follow up Q&A, slides and recordings from this and other SAS Ask the Expert webinars.
Can't join the live event? You can view this and other Ask the Expert sessions on-demand here.
... View more
04-30-2021
11:36 AM
2 Likes
Watch this Ask the Expert session for an introduction to SAS Viya security and take a deeper look into the new two-tier authorization model introduced with SAS Viya.
Watch the webinar
Join Bala Arunagirinathan as he teaches you about SAS Viya security. Administrators will gain the knowledge and confidence to design and implement a comprehensive security model for their existing or future SAS Viya projects. During this webinar you will learn:
General authorization.
CAS authorization.
File system authorization.
The questions from the Q&A segment held at the end of the webinar are listed below and the slides from the webinar are attached.
Is the security model the same for the latest release of SAS Viya, 2020.1?
Yes, it is the same. SAS Viya 2020.1 is an entirely cloud-based deployment but the application usage and administration is the same.
Where should an Admin start first to implement security?
Authentication – bring only the required users from LDAP to Viya (filter)
OS level on the filesystem
General Authorization for the folder contents
CAS Authorization for CAS Libraries
Can I get some links for CLI commands so I can apply via CLI commands?
Here are some resources on the Command-Line Interface:
https://go.documentation.sas.com/doc/en/calcdc/3.4/calcli/p0kun58h1e13d2n1h5gce5qm8vcq.htm
https://go.documentation.sas.com/doc/en/calcdc/3.5/calcli/n01xwtcatlinzrn1gztsglukb34a.htm
https://go.documentation.sas.com/doc/en/calcdc/3.4/calbr/n1e3dfgr1nxlw2n1a0ly06dunrz5.htm
https://blogs.sas.com/content/sgf/2018/03/08/sas-viya-3-3-command-line-interfaces-for-administration/
Is there a certification for SAS Administration?
Yes, there is a certification for SAS 9.4 and SAS Viya 3.5, but we don’t have one yet for SAS Viya 2020.1. We do have SAS Viya administration training courses.
In new SAS Viya implementation, what trainings are provided to the Super Users/Admins?
Here is the SAS Viya 2020.1 training course.
Do changes to the configuration come under vendor support with the product or is it the responsibility of the client super-user or the admin?
It is the responsibility of the administrator. Any administrative tasks that are being done should flow through the SAS administrator. They should be creating the custom groups and handling security, but they also need to accurately document everything and put it in a pdf file.
Are there any limitations on number of custom groups that can be created in SAS Viya?
No
Where are these permissions being saved, is it in a Postgress Database or a SAS Dataset?
Postgress Database
When I create any group in SAS Viya, is it required to create those same groups in LDAP?
It’s not necessary, but if you have a good relationship with your back-end LDAP admin, you can ask them to create the group for you and put the users in the LDAP. It updates in Viya every 12 hours and then you will see the group there and you can do your admin there.
Can we have nested groups?
Yes, you can have them, but it not recommended. I would keep them at a minimum. It’s easier to troubleshoot the non-nested groups.
I have a custom group with six members that have authorizations on objects and containers. For some reason, these authorizations stopped working. I recreated the group (with a different name but same members and same authorizations) and this group has access. Any ideas how to troubleshoot why the first group doesn't have access? Any risk in deleting the first custom group and keeping the second?
You can delete the first group, but let’s figure out why it’s not working first.
Is there any documentation that shows what would be the equivalent component in GRID vs Viya (example: SAS WRS in Grid vs Viya?). This would help in migration plan, thank you!
Here are some resources that should be helpful:
https://blogs.sas.com/content/sgf/2018/08/29/sas-grid-manager-and-sas-viya/
https://blogs.sas.com/content/sgf/2020/09/04/sas-grid-manager-and-sas-viya-a-strong-relationship/
https://blogs.sas.com/content/sgf/2018/11/07/implementing-sas-grid-manager-and-sas-viya/
https://www.sas.com/en_us/webinars/sas-grid-manager-sas-viya-a-perfect-pair.html
https://www.sas.com/content/dam/SAS/support/en/technical-papers/sas9-4-sas-viya-functional-comparison.pdf
https://communities.sas.com/t5/SAS-Communities-Library/SAS-Grid-Manager-and-SAS-Viya-Use-Cases/ta-p/675325
Is Viya 4 out and do you have any documentation on it?
Yes, it is out and we’re calling in Viya 2020.1. You can find documentation here.
How do we control SAS dataset (sas7bdat) access via SAS Environment Manager?
Regarding your question on how to control the SAS dataset permissions, if you are saving your datasets in a filesystem someplace, you need to make sure you set the ACLs permission on the filesystem. Only the users belonging to the groups should be able to Read those datasets. So you will be using the OS commands to secure those datasets. SAS Environment Manager will be used to set the Folder and CASLIB permissions only.
Recommended Resources
Orientation to Authorization
SAS Admin Notebook: Folder Security
Intro to SAS Viya Authorization
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Hi SAS Administration Community,
I’m presenting a live “Ask the Expert” webinar on April 29 th , 1 – 2 PM ET entitled What Do I Need to Know About SAS Viya Security? Join me for an introduction to SAS Viya security and take a deeper look into the new two-tier authorization model introduced with SAS Viya. Administrators will gain the knowledge and confidence to design and implement a comprehensive security model for your existing and future SAS Viya projects. I’ll host a live Q&A session at the end of the webinar.
You will learn:
General authorization.
CAS authorization.
File system authorization.
Reserve your spot for the webinar.
Want more tips? Be sure to subscribe to the Ask the Expert board to receive follow up Q&A, slides and recordings from this and other SAS Ask the Expert webinars.
Can't join the live event? You can view this and other Ask the Expert sessions on-demand here.
Thanks,
Bala Arunagirinathan
bala.arunagirinathan@sas.com
... View more
04-19-2021
11:57 AM
Hi SAS Administration Community,
I’m presenting a live “Ask the Expert” webinar on April 29 th , 1 – 2 PM ET entitled What Do I Need to Know About SAS Viya Security? Join me for an introduction to SAS Viya security and take a deeper look into the new two-tier authorization model introduced with SAS Viya. Administrators will gain the knowledge and confidence to design and implement a comprehensive security model for your existing and future SAS Viya projects. I’ll host a live Q&A session at the end of the webinar.
You will learn:
General authorization.
CAS authorization.
File system authorization.
Reserve your spot for the webinar.
Want more tips? Be sure to subscribe to the Ask the Expert board to receive follow up Q&A, slides and recordings from this and other SAS Ask the Expert webinars.
Can't join the live event? You can view this and other Ask the Expert sessions on-demand here.
Thanks,
... View more