Hi, A blocksize of 1G seems extreme. What is the optimal blocksize of the output device?
Cheers, -Rich On Thu, Jun 23, 2022, 4:52 AM Radisson via Dng <[email protected]> wrote: > Hi list, > i found a strange ext4 (?) effect. > > when i write to a disk: > dd if=/dev/zero of=xx bs=1G count=1 > > reports 2.6 GB (expected) > doing again speed drops to 200MB. > > removing xx restores old speed. > > I ask the net and it seems that the effect is there > since kernel 2.6. I found the explainations a bit confusing. > > does anyone know more ? > > note: i was analysing a performace issue for mysql and i am > not sure if that problems matters outside tests. > > re > rp > > _______________________________________________ > Dng mailing list > [email protected] > https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/dng >
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