PURR SHIELD
Software-layer memory resilience
PURR SHIELD is an autonomous memory resilience system that reduces out-of-memory process termination risk by acting before memory pressure develops, not after.
The Problem
Memory exhaustion can erase days of sustained compute.
Late-stage termination is not just a crash. It is lost runtime, lost progress, and a system that looked healthy until it was already too late.
On memory-constrained instances, a long-running process can accumulate memory until the operating system terminates it - sometimes as early as hour 25 of a week-long run - destroying every hour of compute since the last checkpoint.
Existing tools such as operating-system memory management, container liveness probes, and external supervisors respond after memory pressure appears. PURR SHIELD is designed around prevention: acting while the workload is still healthy.
How It Is Different
Intervene before memory pressure becomes failure.
PURR SHIELD runs inside the same user-space process, with no external supervisor, no kernel modifications, and no elevated privileges.
Trajectory-aware
Continuously monitors process memory consumption and uses forward-looking trajectory analysis before exhaustion develops.
Healthy-state action
Autonomously provisions supplemental virtual memory while the system is still healthy, before pressure becomes visible.
Process-local design
Designed for long-running workloads where an external restart or late health check would still lose valuable work.
License Position
Licensable standalone or combined with CARDIAC-PURR.
PURR SHIELD is available as a standalone license for teams whose primary risk is memory exhaustion during sustained workloads.
It can also run together with CARDIAC-PURR in a single unprivileged process, pairing memory resilience with thermal-stability control.
Validated Results
Zero OOM events across a full 168-hour run.
Without PURR SHIELD, the target instance would have failed at approximately hour 25 of a planned 168-hour run. With PURR SHIELD active, the run completed without out-of-memory termination.
Failure avoided
The untreated target instance would have failed at approximately hour 25; the protected run completed the full 168 hours.
Work preserved
PURR SHIELD acts before memory pressure develops, helping long-running workloads avoid losing progress after late-stage termination.
Combined resilience
When paired with CARDIAC-PURR, the validated combined result was 1.925 billion compute epochs across 167.99 hours with zero throttle events, zero OOM events, and zero data-loss crashes.
FAQ
Public-safe technical orientation.
Memory exhaustion: when a long-running process grows until the operating system terminates it, discarding work since the last checkpoint. PURR SHIELD is built to intervene before that pressure develops, not after.
Those systems react after pressure appears. PURR SHIELD uses forward-looking trajectory analysis to provision supplemental memory while the system is still healthy.
A target instance that would have failed at approximately hour 25 of a planned 168-hour run instead completed all 168 hours with zero out-of-memory terminations.
Yes. PURR SHIELD is available as a standalone license, independent of CARDIAC-PURR.
Autonomous vehicles and ADAS, mobile, scientific HPC, drug discovery, pharma and biotech, energy and seismic workloads, telecom, cryptocurrency, and education technology.
No. Specific implementation details are not publicly disclosed. Full technical documentation is available under mutual NDA.