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Well-Architected Framework Reviews

“Whatever you do in life, surround yourself with smart people who argue with you.” – John Wooden

Many AWS customers and practitioners have leveraged the Well-Architected Framework methodology in building new applications or migrating existing applications. Once a build or migration is complete, how many companies implement Well-Architected Framework reviews and perform those reviews regularly? We have found that many companies today do not conduct regular Well Architected Framework reviews and as a result, potentially face a multitude of risks.

What is a Well-Architected Framework?

The Well-Architected Framework is a methodology designed to provide high-level guidance on best practices when using AWS products and services. Whether building new or migrating existing workloads, security, reliability, performance, cost optimization, and operational excellence are vital to the integrity of the workload and can even be critical to the success of the company. A review of your architecture is especially critical when the rate of innovation of new products and services are being created and implemented by Cloud Service Providers (CSP).

2nd Watch Well-Architected Framework Reviews

At 2nd Watch, we provide  Well-Architected Framework reviews for our existing and prospective clients. The review process allows customers to make informed decisions about architecture decisions, the potential impact those decisions have on their business, and tradeoffs they are making. 2nd Watch offers its clients free Well-Architected Framework reviews—conducted on a regular basis—for mission-critical workloads that could have a negative business impact upon failure.

Examples of issues we have uncovered and remediated through Well-Architected Reviews:

  • Security: Not protecting data in transit and at rest through encryption
  • Cost: Low utilization and inability to map cost to business units
  • Reliability: Single points of failure where recovery processes have not been tested
  • Performance: A lack of benchmarking or proactive selection of services and sizing
  • Operations: Not tracking changes to configuration management on your workload

Using a standard based methodology, 2nd Watch will work closely with your team to thoroughly review the workload and will produce a detailed report outlining actionable items, timeframes, as well as provide prescriptive guidance in each of the key architectural pillars.

In reviewing your workload and architecture, 2nd Watch will identify areas of improvement, along with a detailed report of our findings. A separate paid engagement will be available to clients and prospects who want our AWS Certified Solutions Architects and AWS Certified DevOps Engineer Professionals to remediate our findings.  Download the 2nd Watch Well-Architected Framework Review Datasheet to learn more.  To schedule your free Well-Architected Framework review, contact 2nd Watch today.

 

— Chris Resch, EVP Cloud Solutions, 2nd Watch

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Migrating to Terraform v0.10.x

When it comes to managing cloud-based resources, it’s hard to find a better tool than Hashicorp’s Terraform. Terraform is an ‘infrastructure as code’ application, marrying configuration files with backing APIs to provide a nearly seamless layer over your various cloud environments. It allows you to declaratively define your environments and their resources through a process that is structured, controlled, and collaborative.

One key advantage Terraform provides over other tools (like AWS CloudFormation) is having a rapid development and release cycle fueled by the open source community. This has some major benefits: features and bug fixes are readily available, new products from resource providers are quickly incorporated, and you’re able to submit your own changes to fulfill your own requirements.

Hashicorp recently released v0.10.0 of Terraform, introducing some fundamental changes in the application’s architecture and functionality. We’ll review the three most notable of these changes and how to incorporate them into your existing Terraform projects when migrating to Terraform v.0.10.x.

  1. Terraform Providers are no longer distributed as part of the main Terraform distribution
  2. New auto-approve flag for terraform apply
  3. Existing terraform env commands replaced by terraform workspace

A brief note on Terraform versions:

Even though Terraform uses a style of semantic versioning, their ‘minor’ versions should be treated as ‘major’ versions.

1. Terraform Providers are no longer distributed as part of the main Terraform distribution

The biggest change in this version is the removal of provider code from the core Terraform application.

Terraform Providers are responsible for understanding API interactions and exposing resources for a particular platform (AWS, Azure, etc). They know how to initialize and call their applications or CLIs, handle authentication and errors, and convert HCL into the appropriate underlying API calls.

It was a logical move to split the providers out into their own distributions. The core Terraform application can now add features and release bug fixes at a faster pace, new providers can be added without affecting the existing core application, and new features can be incorporated and released to existing providers without as much effort. Having split providers also allows you to update your provider distribution and access new resources without necessarily needing to update Terraform itself. One downside of this change is that you have to keep up to date with features, issues, and releases of more projects.

The provider repos can be accessed via the Terraform Providers organization in GitHub. For example, the AWS provider can be found here.

Custom Providers

An extremely valuable side-effect of having separate Terraform Providers is the ability to create your own, custom providers. A custom provider allows you to specify new or modified attributes for existing resources in existing providers, add new or unsupported resources in existing providers, or generate your own resources for your own platform or application.

You can find more information on creating a custom provider from the Terraform Provider Plugin documentation.

1.1 Configuration

The nicest part of this change is that it doesn’t really require any additional modifications to your existing Terraform code if you were already using a Provider block.

If you don’t already have a provider block defined, you can find their configurations from the Terraform Providers documentation.

You simply need to call the terraform init command before you can perform any other action. If you fail to do so, you’ll receive an error informing you of the required actions (img 1a).

After successfully reinitializing your project, you will be provided with the list of providers that were installed as well as the versions requested (img 1b).

You’ll notice that Terraform suggests versions for the providers we are using – this is because we did not specify any specific versions of our providers in code. Since providers are now independently released entities, we have to tell Terraform what code it should download and use to run our project.

(Image 1a: Notice of required reinitialization)

Picture1a

 

 

 

 

 

 

 

 

(Image 1b: Response from successful reinitialization)

Picture1b

 

 

 

 

 

 

 

 

Providers are released separately from Terraform itself, and maintain their own version numbers.

You can specify the version(s) you want to target in your existing provider blocks by adding the version property (code block 1). These versions should follow the semantic versioning specification (similar to node’s package.json or python’s requirements.txt).

For production use, it is recommended to limit the acceptable provider versions to ensure that new versions with breaking changes are not automatically installed.

(Code Block 1: Provider Config)

provider "aws" {
  version = "0.1.4"
  allowed_account_ids = ["1234567890"]
  region = "us-west-2"
}

 (Image 1c: Currently defined provider configuration)

Picture1c

 

 

 

 

 

 

 

 

2. New auto-approve flag for terraform apply

In previous versions, running terraform apply would immediately apply any changes between your project and saved state.

Your normal workflow would likely be:
run terraform plan followed by terraform apply and hope nothing changed in between.

This version introduced a new auto-approve flag which will control the behavior of terraform apply.

Deprecation Notice

This flag is set to true to maintain backwards compatibility, but will quickly change to false in the near future.

2.1 auto-approve=true (current default)

When set to true, terraform apply will work like it has in previous versions.

If you want to maintain this functionality, you should upgrade your scripts, build systems, etc now as this default value will change in a future Terraform release.

(Code Block 2: Apply with default behavior)

# Apply changes immediately without plan file
terraform apply --auto-approve=true

2.2 auto-approve=false

When set to false, Terraform will present the user with the execution plan and pause for interactive confirmation (img 2a).

If the user provides any response other than yes, terraform will exit without applying any changes.

If the user confirms the execution plan with a yes response, Terraform will then apply the planned changes (and only those changes).

If you are trying to automate your Terraform scripts, you might want to consider producing a plan file for review, then providing explicit approval to apply the changes from the plan file.

(Code Block 3: Apply plan with explicit approval)

# Create Plan
terraform plan -out=tfplan

# Apply approved plan
terraform apply tfplan --auto-approve=true

(Image 2a: Terraform apply with execution plan)

Picture2a

 

 

 

 

 

 

3. Existing terraform env commands replaced by terraform workspace

The terraform env family of commands were replaced with terraform workspace to help alleviate some confusion in functionality. Workspaces are very useful, and can do much more than just split up environment state (which they aren’t necessarily used for). I recommend checking them out and seeing if they can improve your projects.

There is not much to do here other than switch the command invocation, but the previous commands still currently work for now (but are deprecated).

 

License Warning

You are using an UNLICENSED copy of Scroll Office.

Do you find Scroll Office useful?
Consider purchasing it today: https://www.k15t.com/software/scroll-office

 

— Steve Byerly, Principal SDE (IV), Cloud, 2nd Watch

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Migrating Terraform Remote State to a “Backend” in Terraform v.0.9+

(AKA: Where the heck did ‘terraform remote config’ go?!!!)

If you are working with cloud-based architectures or working in a DevOps shop, you’ve no doubt been managing your infrastructure as code. It’s also likely that you are familiar with tools like Amazon CloudFormation and Terraform for defining and building your cloud architecture and infrastructure. For a good comparison on Amazon CloudFormation and Terraform check out Coin Graham’s blog on the matter: AWS CFT vs. Terraform: Advantages and Disadvantages.

If you are already familiar with Terraform, then you may have encountered a recent change to the way remote state is handled, starting with Terraform v0.9. Continue reading to find out more about migrating Terraform Remote State to a “Backend” in Terraform v.0.9+.

First off… if you are unfamiliar with what remote state is check out this page.

Remote state is a big ol’ blob of JSON that stores the configuration details and state of your Terraform configuration and infrastructure that has actually been deployed. This is pretty dang important if you ever plan on changing your environment (which is “likely”, to put it lightly) and especially important if you want to have more than one person managing/editing/maintaining the infrastructure, or if you have even the most basic rationale as it pertains to backup and recovery.

Terraform supports almost a dozen backend types (as of this writing) including:

  • Artifactory
  • Azure
  • Consul
  • Etcd
  • Gcs
  • Http
  • Manta
  • S3
  • Swift
  • Terraform Enterprise (AKA: Atlas)

 

Why not just keep the Terraform state in the same git repo I keep the Terraform code in?

You also don’t want to store the state file in a code repository because it may contain sensitive information like DB passwords, or simply because the state is prone to frequent changes and it might be easy to forget to push those changes to your git repo any time you run Terraform.

So, what happened to terraform remote anyway?

If you’re like me, you probably run the la version of HashiCorp’s Terraform tool as soon as it is available (we actually have a hook in our team Slack channel that notifies us when a new version is released). With the release of Terraform v.0.9 last month, we were endowed with the usual heaping helping of excellent new features and bug-fixes we’ve come to expect from the folks at HashiCorp, but were also met with an unexpected change in the way remote state is handled.

Unless you are religious about reading the release notes, you may have missed an important change in v.0.9 around the remote state. While the release notes don’t specifically call out the removal (not even deprecation, but FULL removal) of the prior method (e.g. with Terraform remote config, the Upgrade Guide specifically calls out the process in migrating from the legacy method to the new method of managing remote state). More specifically, they provide a link to a guide for migrating from the legacy remote state config to the new backend system. The steps are pretty straightforward and the new approach is much improved over the prior method for managing remote state. So, while the change is good, a deprecation warning in v.0.8 would have been much appreciated. At least it is still backwards compatible with the legacy remote state files (up to version 0.10), making the migration process much less painful.

Prior to v.0.9, you may have been managing your Terraform remote state in an S3 bucket utilizing the Terraform remote config command. You could provide arguments like: backend and backend-config to configure things like the S3 region, bucket, and key where you wanted to store your remote state. Most often, this looked like a shell script in the root directory of your Terraform directory that you ran whenever you wanted to initialize or configure your backend for that project.

Something like…

Terraform Legacy Remote S3 Backend Configuration Example
#!/bin/sh
export AWS_PROFILE=myprofile
terraform remote config \
--backend=s3 \
--backend-config="bucket=my-tfstates" \
--backend-config="key=projectX.tfstate" \
--backend-config="region=us-west-2"

This was a bit clunky but functional. Regardless, it was rather annoying having some configuration elements outside of the normal terraform config (*.tf) files.

Along came Terraform v.0.9

The introduction of Terraform v.0.9 with its new fangled “Backends” makes things much more seamless and transparent.  Now we can replicate that same remote state backend configuration with a Backend Resource in a Terraform configuration like so:

Terraform S3 Backend Configuration Example
terraform {
  backend "s3" {
    bucket = "my-tfstates"
    key    = "projectX.tfstate"
    region = "us-west-2"
  }
}
A Migration Example

So, using our examples above let’s walk through the process of migrating from a legacy “remote config” to a “backend”.  Detailed instructions for the following can be found here.

1. (Prior to upgrading to Terraform v.0.9+) Pull remote config with pre v.0.9 Terraform

> terraform remote pull
Local and remote state in sync

2. Backup your terraform.tfstate file

> cp .terraform/terraform.tfstate 
/path/to/backup

3. Upgrade Terraform to v.0.9+

4. Configure the new backend

terraform {
  backend "s3" {
    bucket = "my-tfstates"
    key    = "projectX.tfstate"
    region = "us-west-2"
  }
}

5. Run Terraform init

> terraform init
Downloading modules (if any)...
 
Initializing the backend...
New backend configuration detected with legacy remote state!
 
Terraform has detected that you're attempting to configure a new backend.
At the same time, legacy remote state configuration was found. Terraform will
first configure the new backend, and then ask if you'd like to migrate
your remote state to the new backend.
 
 
Do you want to copy the legacy remote state from "s3"?
  Terraform can copy the existing state in your legacy remote state
  backend to your newly configured backend. Please answer "yes" or "no".
 
  Enter a value: no
  
Successfully configured the backend "s3"! Terraform will automatically
use this backend unless the backend configuration changes.
 
Terraform has been successfully initialized!
 
You may now begin working with Terraform. Try running "terraform plan" to see
any changes that are required for your infrastructure. All Terraform commands
should now work.
 
If you ever set or change modules or backend configuration for Terraform,
rerun this command to reinitialize your environment. If you forget, other
commands will detect it and remind you to do so if necessary.

6. Verify the new state is copacetic

> terraform plan
 
...
 
No changes. Infrastructure is up-to-date.
 
This means that Terraform did not detect any differences between your
configuration and real physical resources that exist. As a result, Terraform
doesn't need to do anything.

7.  Commit and push

In closing…

Managing your infrastructure as code isn’t rocket science, but it also isn’t trivial.  Having a solid understanding of cloud architectures, the Well Architected Framework, and DevOps best practices can greatly impact the success you have.  A lot goes into architecting and engineering solutions in a way that maximizes your business value, application reliability, agility, velocity, and key differentiators.  This can be a daunting task, but it doesn’t have to be!  2nd Watch has the people, processes, and tools to make managing your cloud infrastructure as code a breeze! Contact us today to find out how.

 

— Ryan Kennedy, Principal Cloud Automation Architect, 2nd Watch

 

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Decision Points: Moving Enterprise Workloads to the Cloud

When you’re ready to move to the cloud, it’s truly a transformational time.  Determining your cloud strategy before moving too quickly is paramount.  It is important to make the hard and big decisions first.  You will be in the cloud for many years to come.  This can be a time to also remove years of technical debt.  After all, you want to migrate your workloads and not lift and shift your technical debt along with it.  At the same time, you do not want to experience “analysis paralysis” with all the decisions to be made.  Ultimately, you can have the speed, agility and cross-organizational support while providing the proper governance and guardrails.

Determining your migration strategy ahead of time is important for security, change management, and cost containment.  The promise of the cloud is great.  You might want to allow people to build and development environments at will.  You have smart and capable people.  They need help to quickly deploy.  Shadow IT results when innovative people are constrained from experimenting.  And often, the intention is that it will be temporary.  However, temporary quickly becomes permanent and undocumented without compliance.  The decision points listed in this article are important.  This is by no means a compressive list, as other items will likely reveal themselves during the process.

Decisions for Enterprise Cloud Migration – the Business of the Cloud:

  • Discovery – Can you get an accurate list of the application inventory?  What operating systems are in use?  Are all the applications still relevant or can they be retired?  What are the applications that have dependencies on other applications?  It may be hard to get this list together.  Some of these applications are likely many years old.  This can be time consuming and will help identify the true scope and cost estimates of moving to the cloud.  In many cases, third party discovery tools can aid in the discovery.
  • Vision and Education – Are the teams infighting and holding territory?  This can be related to understanding the cloud as well as they can.  It can be scary as all transformations are.  Y2K, client/server and the Internet revolution were scary as well.  We survived.  Plans for education to create awareness and capabilities will help.  There are also many misconceptions about the cloud in top management that will probably need to be addressed.

Strategic Decisions for the Cloud:

  • Which cloud providers are you going to use?  Clearly, Amazon Web Services is the leading cloud service provider.  However, a multi-cloud strategy may be important to the company as well.  How are you going to interconnect the cloud providers?
  • What account strategy will you use?  Will applications get their own account?  Or will accounts be aligned by business unit?  There are many different approaches to account strategy.  It will be hard to undue, so it is important to weigh the pros and cons of each strategy to account for billing, security and isolation.
  • What will your networking strategy be for networking in the cloud?  Will you use non-overlapping subnets managed with your on premise IP management?  Will you isolate production and non-production environments to separated block ranges in VPCs?  Or will you allow your migrated applications to only be accessed over the public internet instead of VPN?  It could also be a combination of these strategies.  There are many variables that will need to be identified to determine the best strategy.
  • Will you integrate on premise Identity management systems with your cloud infrastructure?  Active directory is common technology in most enterprises.  Will you extend your current AD architecture?  What changes need to be made to make it optimal for the cloud?

Decisions for Cost, Security and Compliance:

  • How will you tag your cloud assets?  Will it account for billing, security, and compliance?  Getting this right early on will allow for automation to enforce compliance and monitor for violations.
  • How will you manage the cloud costs?  Will you allow developers to provision their own instances?  What will your Reserved Instance strategy be?  How often does it need to be reviewed?  Costs in the cloud can spin out of control if proper guardrails are not established.  Scheduled power on and power off of environments is also another important strategy to further reduce costs.
  • What technologies are approved for cloud deployments?  Will your organization create approved images?  How will they be managed and updated?  Maybe your organization has approved base software that must be installed.  How will you maintain this configuration?  Configuration management and image baking are important processes to identify and define.
  • How will the cloud assets be continuously monitored for compliance?  Once a violation is found, how will it be remediated, with automation or manually?  Between AWS Config, CloudTrail and Tagging strategies, much of this task can be accomplished with automation.  However, there still needs to be individuals that review and update the process.
  • How will you secure your cloud environments?  WAF, anti-virus, IDS/IPS, and firewalls are just part of the overall security solution.  How will you control egress traffic as well?  How will you isolate your applications from each other and control user access?  We all know security is hard and requires constant care.  Find the right balance between real threats while still providing agility are important.
  • Will you secure data at rest?  Will you use built in AWS services for encryption keys, KMS or CloudHSM?  Or will you bring your own keys?  How will you provide column or row based encryption of your databases?  Cloud solutions need to be analyzed against the company standards to determine if you can use built in cloud encryption or decide to roll your own.
  • How will you provision your certificates for data in transit?  AWS provides the Certificate Manager service to provision SSL certificates.  Or will you continue to use your existing provider?  How will you track expiring certificates and update them?  AWS has many features for SSL including integration with their Elastic Load Balancers.
  • How will you manage your big data?  Will you scale up or out?  Are the workloads transient?  There are many options for cost optimization.  Between Spot Instances and automation, incredibility elegant solutions can be created.
  • What are your Disaster Recovery policies?  Do they need to be adjusted for the cloud?  Most likely they do.  How will you deliver your DR solutions?  Again, there are many solutions for DR in the cloud from infrastructure as code and creating automation to critical data and servers between regions.
  • What are your data retention policies?  How will you implement them in the cloud?  How will you ensure that you have met your regulatory compliance?  There are built-in solutions for data life cycles in AWS, but in many cases, it is more complicated than what is available off the shelf.
  • How will you handle OS and application licensing?  Will you use on-demand or bring your own licenses?  There is no one right answer.  ROIs needs to be calculated in many cases.
  • What is your single-sign-on (SSO) solution?  How will it integrate into the cloud?  AWS does provide federated authentication all of its services.

This is a long list of questions.  It isn’t intended to scare you away from the cloud, but rather to embrace it correctly.  No two enterprises are identical, but most share many of the same challenges.  Starting with this list of questions may help you identify many of the successful approaches to a migration journey to the much-promised benefits of the cloud.

-Ian Willoughby, Principal Architect

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Top Business Issues When Moving to the Cloud

Jeff Aden, EVP of Business Development and Marketing at 2nd Watch, recently contributed this article on top business issues when moving to the cloud to Data Center Knowledge Enjoy!

When planning a move to the cloud, CIOs often worry about if and how legacy applications will migrate successfully, what level of security and archiving they need, whether they have the right internal skills and which cloud providers and toolsets are the best match for business goals.

There are also a number of business issues to consider, such as the changing nature of contracts and new considerations for budgeting and financial planning. For instance, transitioning from large upfront capital purchases, such as data center investments and software agreements to monthly service fees can help lower costs related to the management and maintenance of technology, much of which is underutilized. There’s also no need to deploy capital on unutilized resources — all positive changes. Yet pay-as-you-go pricing also brings a change in how IT is purchased: the CFO will need processes for monitoring usage and spending, to prevent so-called cloud sprawl.  Here’s our take on the top considerations beyond technology planning for making a smooth move to the cloud.

  1. Working with existing IT outsourcers. A recent survey by Gartner noted that approximately 70% of CIOs surveyed will be changing IT vendor and sourcing relationships over the next two years. The primary reason for this shift is that most traditional IT service providers aren’t delivering public cloud-related services or products that are suited for the transition to a digital business. Dissolving or changing relationships with longtime IT partners will take some thought around how to structure the right business terms. For instance, when renewing contracts with current vendors, companies may seek to add a clause allowing them to bifurcate between current services (hardware/colocation) and emerging services such as cloud. This will allow the right provider with the right skill sets to manage the cloud workloads. If your company is within an existing contract that’s not up for renewal soon, look for another legal out, such as “default” or “negligent” clauses in the contract, which would also allow you to hire a reputable cloud IaaS firm because your current provider does not have the skill set, process for expertise in a new technology. Reputable vendors shouldn’t lock their customers into purchasing services which aren’t competitive in the marketplace. Yet, the contract rules everything, so do whatever you can to ensure flexibility to work with cloud vendors when renewing IT contracts.
  1. Limits of liability. This contractual requirement gives assurances to the customer that the vendor will protect your company, if something goes wrong. Limits of liability are typically calculated on the number of staff people assigned to an account and/or technology investments. For instance, when a company would purchase a data center or enter into a colocation agreement, it required a large CAPEX investment and a large ongoing OPEX cost. For these reasons, the limits of liability would be a factor above this investment and the ongoing maintenance costs. With the cloud, you only pay for what you use which is significantly less but grows overtime. Companies can manage this risk by ensuring escalating limits of liability which are pegged to the level of usage. As your cloud usage grows, so does your protection.
  1. Financial oversight. As mentioned earlier, one advantage of on-premise infrastructure is that the costs are largely stable and predictable. The cloud, which gives companies far more agility to provision IT resources in minutes with a credit card, can run up the bill quickly without somebody keeping a close watch of all the self-service users in your organization. It’s more difficult to predict costs and usage in the cloud, given frequent changes in pricing along with shifts in business strategy that depend upon easy access to cloud infrastructure. Monitoring systems that track activity and usage in real time, across cloud and internal or hosted environments are critical in this regard. As well, finance tools that allow IT and finance to map cloud spending to business units and projects will help analyze spend, measure business return and assist with budget planning for the next quarter or year. Cloud expense management tools should integrate with other IT cost management and asset management tools to deliver a quick view of IT investments at any moment. Another way to control spend is to work with a reseller. An authorized reseller will be able to eliminate credit card usage, providing your company with invoicing and billing services, the ability to track spend and flexible payment terms. This approach can save companies time and money when moving to the cloud.
  1. Service catalogue: A way to manage control while remaining agile is to implement a service catalogue, allowing a company’s security and network teams to sign off on a design that can be leveraged across the organization multiple times with the same consistency every time. Service catalogues control which users have access to which applications or services to enable compliance with business policies while giving employees an easy way to browse available resources. For instance, IT can create a SAP Reference Implementation for a environment.  Once this is created, signed off by all groups, and stored in your service catalogue it can be leveraged the same way, every time and by all approved users.  This provides financial control and governance over how the cloud is being deployed in your organization. It can also move your timelines up considerably, saving you weeks and months from ideation to deployment.
  1. Staffing/organizational changes: With any shift in technology, there is a required shift in staffing and organizational changes. With the cloud, this involves both skills and perspective.  Current technologists whom are subject matter experts, such as SAN engineers, will need to understand business drivers, adopt strategic thinking and have a focus on business-centered innovation.  The cloud brings tools and services that change the paradigm on where and how time is being spent.  Instead of spending 40% of your time planning the next rack of hardware to install, IT professional should focus their energies responding to business needs and providing valuable solutions that were previously cost prohibitive, such as spinning up a data warehouse for less than a $1,000 per year.

To set up a private appointment with a 2nd Watch migration expert, Contact Us.

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