Comments (2)
no, cachelib doesn't support online backup. Could you explain why do you need persistence in the case of "kill -9"?
from cachelib.
Unlike storage engines, cachelib does not offer crash consistent storage of items. for caches, this is not a deal breaker since durability is not a prime concern for the cache. Besides, caches operate with background evictions, so the application already expects the cache to be empty or missing items. In steady state, cachelib has DRAM data structures that need to be persisted for recovery on restart. If a cache process is receiving a kill -9, we can not guarantee the state of these DRAM data structures to be consistent for shutdown. So I would not recommend catching the kill signal and doing a shutdown unless you can guarantee that the application threads have stopped accessing the cache and shutdown api can be safely called.
There is an internal experimental feature, but it is not the "kill -9" feature you are probably looking for. With that you can snapshot the cache by shutting it down (after ensuring application thread stop accessing cache) and copying the state to another machine to bootstrap another cache from it.
from cachelib.
Related Issues (20)
- The performance deterioration is observed in the new version
- compilation error HOT 3
- Create a version with stable facebook project dependencies HOT 1
- make_unique was not declared when compiled HOT 1
- Runtime error (seem to be caused by link error) HOT 4
- Fail to persist nvm cache due to "exceeding metadata limit" HOT 1
- Build failure - cannot find python-six HOT 2
- build.sh: error: failed to build cachelib HOT 2
- build.sh: error: No build recipe for detected operating system 'fedora38' HOT 3
- New runtime error HOT 5
- cachelib fails to build HOT 3
- allocator-test-AllocationClassTest Failed On ARM
- Where is `cachelib/facebook/admin/CacheAdmin.h`? HOT 1
- cachelib fails to build HOT 3
- refCount alignment issue HOT 4
- The method config.enableChainedItems() cannot be found. HOT 1
- Some questions in resizing the cachelib pool size HOT 2
- Is there any plan to provide an Java SDK for this cachelib ? HOT 2
- Fail to build dependency fbthrift (with errors reported in fmt) HOT 4
- make clean option for contrib/build.sh HOT 1
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from cachelib.