~/talk

I/O in a Flash: Evolution of ONTAP to Low-Latency SSDs

on YouTube 22m
Talkat 22nd USENIX Conference on File and Storage Technologies (FAST '24) · 2024-02-27..02-29· [web-performance]

speakers

name:Matthew Curtis-Maury
links:none on file
name:Ram Kesavan
links:none on file
name:Bharadwaj V. R.
links:none on file
name:Nikhil Mattankot
links:none on file
name:Vania Fang
links:none on file
name:Yash Trivedi
links:none on file
name:Kesari Mishra
links:none on file
name:Qin Li
links:none on file

resources

video:https://youtu.be/RVs1JjYQAkU
slides:none on file

summary

Claims that ONTAP’s read path is refactored to hit tens of microseconds with SSDs by eliminating message-passing hops and context switches. Implements MP-safe page headers, an IO buffer type, a storage location cache and hierarchical attributes cache so protocol threads can look up mappings and dispatch DMA straight to storage threads. Results show much lower latency and higher throughput for 4K random and 64K sequential reads while retaining ONTAP’s read-after and atomicity guarantees.

AI-written summary · about

chapters (7)

  1. 0:00Introduction and context
  2. 2:11Initial system foundations
  3. 3:52Read path analysis
  4. 7:45Optimizing the read path
  5. 13:54Advanced caching strategies
  6. 17:39Correctness and consistency
  7. 19:27Conclusion and takeaways

related talks

~/search
type to search 6,249 conferences, 138,987 speakers and 185,172 talks
~/help
cmdctrl k
search every conference, speaker and series
/
focus the filter search
h
home
c
conferences
s
speakers
e
series
t
light / dark — the status bar button does the same
?
this help
esc
close this, then clear every filter — or just the search, while you are typing in it

Ignored while you are typing. Pages without a filter rail have no search to focus.