Test how your application handles a Memorystore outage. Run Gremlin network experiments and reliability tests to validate cache-miss handling.
Google Cloud Memorystore instances don't necessarily persist their contents. Depending on tier and configuration, a restart or failover brings the cache back empty, and an empty cache is functionally the same as no cache at all for as long as it takes to warm up.
That warm-up window is the risk. Every request during it goes to the database, at full production traffic, until the working set is repopulated. For a large cache serving heavy read traffic, warming can take long enough that the database is under sustained pressure rather than a brief spike.
Gremlin lets you measure the window before you live through it. A blackhole experiment against the cache endpoint under realistic load sends every request to the database so you can watch what it absorbs. A latency experiment simulates a degraded node, which tells you whether your timeouts are short enough that a slow cache doesn't become a slow application.
The question isn't only whether your database survives the initial rush. It's whether it survives the entire time your cache takes to become useful again.
Dependencies: Failure Test
Simulate a failed dependency by dropping all network traffic to the dependency.
Dependencies: Latency Test
Recreate poor network conditions by delaying all network traffic to a dependency by 100ms.
Unreliable Networks - Dependencies
Simulate unreliable network conditions when communicating with dependencies by adding latency to API calls. Test whether your users are affected when dependency response times degrade.
* Testing a dependency doesn't require installing anything on it. Gremlin runs the experiment from the service that calls it, so compatibility depends on that host rather than on the dependency itself. Check our compatibility documentation for supported operating systems and platforms, or get in touch if you don't see yours.
Intelligent Health Checks - GCP
Automatically monitor your Google Cloud services during testing in one-click with Intelligent Health Checks.
Avoid downtime. Use Gremlin to turn failure into resilience.
Gremlin empowers you to proactively root out failure before it causes downtime. See how you can harness chaos to build resilient systems by requesting a demo of Gremlin.
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