[Rpm-maint] [rpm-software-management/rpm] Add macro to force fsync() on close() (#187)
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Wed Apr 5 01:15:56 UTC 2017
Good if doing in fsm.h ( I haven't looked).
Meanwhile a 50x slower installation is intolerable for a package manager even if opt-in.
Nor can an application like RPM be expected to detect whether the underlying filesystem is on SSD or USB or rotational disk and adapt accordingly: there simply aren't the necessary API/s.
I believe that your databases are stalling, package management is a huge I/O load, unlike any other typical application.
Meanwhile -- depending on what statistics you report (if any) -- the issue of 1) "hardening" install's in spite of exceptional outages 2) preventing "write starvation" of other running applications by introducing a resource cap on RPM I/O, will be clear.
What measurements are you using to justify your fsync patch? That is not yet clear ...
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