What’s the best version control system for your team — Perforce P4 or ClearCase? Here, we compare the two so you can make the right choice for your team.
Perforce vs. ClearCase: A Comparison
The following chart outlines some of the differences between ClearCase and Perforce P4. Keep reading to go further in-depth on each of their capabilities.
| CAPABILITY | CLEARCASE | P4 |
|---|---|---|
| PERFORMANCE AND SCALABILITY | Slows down as your assets grow. | Fast no matter how many 1,000s of users or petabytes of data. |
| REPLICATION | Costly add-on tool for replication (ClearCase MultiSite). | Built-in replication (Perforce Federated Architecture). |
| BRANCHING AND MERGING | It’s complicated. | Automation, flexibility, and control. |
| WORKING WITH GIT | No support for Git. | Add-on option for Git teams (P4 Git Connector). |
| SECURITY | Tied to OS permissions — difficult to sync and maintain across architectures. | Self-managed permissions and access control supports complex use cases. |
| COST OF OWNERSHIP | Expensive licenses and productivity costs. | Per-user licensing and productivity gains. |
Or check out a PDF version of the comparison.
Performance and Scalability
Performance and scalability are critical for enterprise teams, especially those with large, monolithic codebases.
Here’s how ClearCase and P4 capabilities compare.
ClearCase’s Versioned Object Base (VOB) requires using either a dynamic view or a snapshot view to access your data.
Dynamic views requires installation of the MultiVersion File System (MVFS). This requires you to make modifications to the kernel of the operating system. Snapshot views do not require the new filesystem, but are notoriously slow.
ClearCase dynamic views requires a continuous network connection to the server(s). This slows down network operations, among other activities.
P4 has proven installations with 10,000+ users accessing a single repository. And many repositories hold millions of files and petabytes of data. Plus, P4 accelerates workflows with lightning-fast commits and concurrent builds.
Which Performs and Scales More?
P4 has better performance and scalability than ClearCase.
When ClearCase projects mature, their codebase and history grows. The repository might not be able to keep up with the increased workload. So, the project can become impossible to maintain. Common operations like updating or merging might now take hours to complete.
P4 offers high performance at scale, no matter how big your projects and repositories grow. You’ll be able to maintain it — and sync or merge — in seconds.
Replication
Replication is also critical whenever remote teams need to work together around the globe.
To manage remote teams, ClearCase offers MultiSite. But you need to buy it separately. It also requires considerable effort to administer and maintain. If you replicate a repository for the person who needs it, you’ll have to pay for everyone who touches it. (Even if you have 100s or 1,000s of developers locally and only 5 people remote!)
ClearCase MultiSite also requires continual management of the “branch mastership.” This adds a lot of overhead to the development teams, reducing velocity.
Perforce delivers better replication with P4. For small remote offices, P4 can incorporate a simple proxy/cache server. This requires almost no setup or administration to deliver benefits to global teams.
For larger offices, P4 has advanced replication technology called Perforce Federated Architecture. Each location has its own server (e.g., Linux, Macintosh, PC). Assets replicate automatically. This means the assets are available where and when teams need them, nearly instantaneously.
Which Replication Is Better?
P4’s replication is better, faster, and built right in to the product.
Your users need to access and submit to repositories from all over the world, 24 hours a day. Without proper caching or replication technology, remote teams suffer. Latency and bandwidth saturation severely hamper productivity.
ClearCase MultiSite is an old-fashioned way to address global VCS functionality. This doesn’t work for teams with multiple terabytes or petabytes of assets.
With P4, there is no complex administration and no branch mastership to deal with.
Branching and Merging
Branching and merging are important operations for development teams.
ClearCase includes basic branching and merging capabilities using either base ClearCase or UCM.
With base ClearCase, there is no true relationship between ClearCase branches and, for example, the main codeline. The development process must be either written down somewhere for people to follow or automated using external scripts. Without creating automation, it is very difficult to know where to propagate changes to from branch to branch.
UCM is a layer on top of ClearCase that uses a very restrictive and inflexible branching model. As it sits on top of base ClearCase, it adds an additional performance cost to daily operations and introduces extra complexity.
P4 includes branching with Perforce Streams. Streams provides automation, flexibility, and control. You can automate your process and see branch-to-branch relationships graphically. So, you’ll be able to clearly identify where changes need to be applied.
Plus, Streams support complex development processes and reduce bottlenecks. And you won’t have to write any scripts.
[Related Blog: Perforce Branching 101]
Which Is Better For Branching and Merging?
P4 offers more automation, flexibility, and control for branching and merging.
In ClearCase, integrating work between teams can be time-consuming. This often leads to delayed integration and testing which causes longer, drawn-out code freezes, and delayed releases.
ClearCase users spend a lot of time fixing merge conflicts which hinders their productivity, reduces velocity and impacts the bottom line.
With P4, you won’t waste time unnecessarily reconciling merges and tracking changes.
Plus, bug fixes often need to be applied to several release branches to avoid regressions. With Perforce Streams, you can clearly identify where changes need to be applied. You won’t have to waste time tracking down individual changes.
Working With Git
Many teams use Git — or need to work with teams who do.
ClearCase lacks native Git management capabilities.
P4 has an add-on for Git teams, the P4 Git Connector. P4 Git Connector provides a secure path for your developers to use their preferred Git tools (including GitHub, GitLab, and Bitbucket), while your art and design teams use a version control solution that won’t slow them down. With the P4 Git Connector, you can consolidate Git code with your digital assets in P4 to to create a unified, single source of truth.
Which Is Better?
P4 provides options for working with Git. ClearCase doesn’t.
[Related Blog: ClearCase vs. Git]
Security Controls
Security is always important in version control.
ClearCase’s security follows a similar model to a UNIX filesystem. Permissions can be applied at the VOB, directory, or file level. However, because ClearCase’s permissions are dependent on the operating system it can be nearly impossible to synchronize permissions across different platforms (Linux, Windows, Mac) and network domains.
With P4, you can limit user access down to individual files using any combination of users and groups. The permissions work across all operating systems and are consistent across networks. You’ll have complete file-level access control and a full audit log. Plus, P4 supports integrates with your organization's Identity Provider (IdP).
P4 Authentication Service (HAS) currently supports the OpenID Connect and SAML 2.0 authentication protocols. It can be used in conjunction with clients, plugins, and the command-line. This service is internally certified with Microsoft Azure Active Directory (AAD), Okta, and Google Identity. It is also known to be compatible with other IdPs such as Auth0, OneLogin, and Google G-Suite.
Which Is Better?
Both ClearCase and P4 provide strong security options. However, P4 offers more granular permissions and much simpler administration.
Cost of Ownership
Cost of ownership is an important consideration.
ClearCase’s active-user floating license model is expensive to purchase and maintain.
You’ll need additional tooling for global development, which adds to the costs. The lack of integrations and missed automation opportunities also drive up costs. So does administrative support. You typically need 1 administrator for 25–50 users.
P4’s per-user licensing model and maintenance fees provide immediate cost-savings. Plus, the tooling you need to maintain the on-premises and global development sites is less expensive.
Administrators can easily maintain P4 — even for 1,000s of users across multiple development sites.
Which Is More Costly?
ClearCase is more expensive to license and maintain. P4 is less expensive with a greater ROI.
Reducing fixed costs is essential to realizing a competitive advantage. P4 reduces costs with less expensive infrastructure and extensive integrations. This leads to savings in productivity — and a comparatively lower total cost of ownership.
Here’s an example of the ROI of using P4 compared to ClearCase.
P4syncs faster — and increases development velocity. That means saving:
5 minutes per update/sync * 10 syncs per week * $125/hour * 500 developers * 52 weeks = $2,708,333 saved
Plus, syncing faster enables teams to ship faster and ship more.
5 Reasons to Replace ClearCase
In this on-demand webinar, learn five reasons it’s time for embedded development teams to migrate from their legacy data management system to a scalable, future-proof solution.
Perforce vs. ClearCase: Why Switch to Perforce P4?
Many teams are making the switch from ClearCase to Perforce P4. And for good reasons.
ClearCase is a legacy system that has changed hands many times — from Atria to PureAtria (via Rational) to IBM (with support via HCL).
That means you can expect to see zero ongoing innovation and improvement in ClearCase. With ClearCase, you are paying a lot upfront for outdated technology.
P4, on the other hand, is actively developed and maintained. New, exciting features are added to P4 through multiple product releases every year.
P4 beats ClearCase in capabilities across the board.
Here are the biggest reasons why teams leave ClearCase for P4.
ClearCase:
- Lacks a modern architecture.
- Doesn’t scale.
- Is expensive to maintain.
- Offers replication as an add-on — but it’s expensive and time-consuming.
Perforce P4:
- Provides a modern architecture.
- Scales without limits.
- Is less costly to maintain.
- Has built-in replication.
It’s clear that ClearCase can’t handle the complexity and demands that enterprise development teams face today. But P4 can—with ease.
In fact, that’s what we hear from our customers every day.
Back to topClearCase to P4: Examples From 3 Teams Who Made the Switch
Here’s why three enterprise teams made the switch.
Global Investment Bank
A financial services leader migrated from ClearCase to P4. Here’s what happened.
Costs went down. ClearCase costed $500K annually. P4 cost $150K. That’s $350K saved each year.
Replications got faster. A simple replication used to take up to 20 minutes with ClearCase. But since migrating to P4, those same tasks now take just 2 minutes or less.
P4 outperformed ClearCase, handling 1,000+ components, a 20GB repository, and 1M+ files.
National Instruments
National Instruments migrated from ClearCase to P4. Here’s what happened.
Speed, ease of use, flexibility, and cost were the factors that sold National Instruments on P4.
P4 delivered. So, they expanded P4 usage from software development to the hardware side of the business.
Performance improved. P4 handles 100,000+ commands per 24-hour period on their main server.
Amdocs
Amdocs migrated from ClearCase to P4. Here’s what happened.
The migration was fast. The actual migration took just one day, with the overall migration process completed in only five months.
Merge and integration activities got faster. They used to take days to complete — and require multiple developers. With P4, these same tasks take minutes.
Costs went down. They no longer needed a full-time admin to oversee their licenses. A part-time admin can oversee 1,000+ licenses in P4.
Back to topPerforce P4: The Clear Choice For ClearCase Users
P4 is the clear choice for teams that are running into scalability, performance, security, cost, or maintenance issues with ClearCase.
See for yourself why leading organizations are making the switch from ClearCase to P4. You can get started for free for up to 5 users.
Try it out today.