Bufferbloat
Bufferbloat
Posted Mar 26, 2020 9:33 UTC (Thu) by zdzichu (subscriber, #17118)Parent article: Speeding up Linux disk encryption (Cloudflare)
It's interesting to see most of the problems were caused by various queues in I/O path. Buffers made sense for HDDs, but are impediments for contemporary storage. Biggest part of fix was ripping out the queues.
Once again bufferbloat is to blame, and once again storage layers are emulating what networking did earlier.
Once again bufferbloat is to blame, and once again storage layers are emulating what networking did earlier.
Posted Mar 29, 2020 22:40 UTC (Sun)
by bored (subscriber, #125572)
[Link]
Bufferbloat
That is only partially true. I had problems in the very early 2000's using disks arrays we purchased, that cost barely more than a midrange workstation, because the linux block layer/buffering would peg the CPU's in our machines at 100% while only delivering a small fraction of the disk's bandwidth capabilities.