>>> Phillip Susi <phill@xxxxxxxxxxxx> schrieb am 10.02.2021 um 20:39 in Nachricht <878s7v6759.fsf@xxxxxxxxxxxxxxxx>: > Chris Murphy writes: > >> It's not interleaving. It uses delayed allocation to make random >> writes into sequential writes. It's tries harder to keep file blocks > > Yes, and when you do that, you are inverleaving data from multiple files > into a single stream, which you really shouldn't be doing. IIRC, XFS > has special io streaming modes specifically designed to *prevent* this > from happening and record multiple video streams simultaniously to > different parts of the disk to keep them from being fragmented to hell > like that. I wonder: Would this discussion benefit if some blocktrace graphics were shown to prove the claims? (Several years ago I did that to examine our Database I/O. See example) Regards, Ulrich
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