IBM DevOps Code ClearCase vs. SUSE Harvester

IBM Rational ClearCase might be better suited for a smaller / simpler code base. Larger code bases really slow it down... but then again there are better alternatives out there for source control

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It's great for provisioning any kind of virtual servers, but for now, we use it to provision only servers for Rancher managed Kubernetes clusters. But we are considering to provision also virtual servers for all kinds of needs on SUSE Harvester in the near future, as it's getting more and more mature with every release.

• Rational ClearCase is excellent for handling versioning and branching. No other tool I've used has the depth that ClearCase has when it comes to handling complex branching scenarios and identifying where certain versions of particular files are within a particular configuration.
• Rational ClearCase handles parallel development of many dependent applications really well.
• The use of ClearCase Views to switch between projects and configurations is extremely convenient as opposed to the local workstation model of the competitors.

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• Fast to deploy new virtual machines
• It's easy to use
• Stable and ready for production
• Free and open source
• Has a strong community

• Extremely buggy.
• Sometimes the repository gets locked for no reason.
• Slow.

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• It takes expertise to set up SUSE Harvester for production
• You need to get used to SUSE Harvester to be as "fluent" as in VMWare ESXi
• You need to well prepare for system upgrades

If development is centrallized to one location and your company releases hundreds of customized versions of your software per year, then ClearCase is the best tool for managing the complexity of multiple versions of customized software. If your company has globally distributed development, then I'd recommend Team Foundation Server over ClearCase. If your organization uses Agile Methodologies, then I'd recommend TFS with GIT.

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We used ESXi for years and were happy with it. Then we implemented Rancher managed Kubernetes clusters with nodes provisioned on VMware ESXi. Later, when SUSE Harvester came out, we started to provision SUSE Rancher nodes on Harvester. Both VMware ESXi and SUSE Harvester are great products, and I think - we are keeping both, at least for now, when SUSE Harvester is a young project.

• Managed code versioning for many years.
• Only one person can edit code at a time - slows processing down.
• IBM is an expensive product to support.

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• We can provision more virtual servers
• It's cheaper than competitor products (tbh - it's free, if you don't need support)
• It's easy to manage when you get used to it