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Current FSFS performance [RAW]

From: Stefan Fuhrmann <stefan.fuhrmann_at_wandisco.com>
Date: Mon, 23 Jun 2014 23:45:23 +0200

I'm currently in travel limbo but I still want to share the
test results that I got with the latest f7 improvements.
They are attached in raw text format as produced by
the script and I will post a nicer version with proper
explanation later this week.

This is what I ran (all on the same machine):

  [f6 | f7]
x [ruby unpacked | ruby packed | bsd packed]
x [http | svn | file]
x [HDD HW raid | SSD SW raid | RAM disk]
x [slow default | medium | fast settings]

Basic results:

* f7 unpacked similar to f6 unpacked (+/-)
* packed significantly faster on HDD
* f7 packed ~2x as fast as packed f6 for export on HDD,
  details vary greatly with setup
* SSD or faster storage gets CPU bound with f7
  at 20 .. 60MB/s from cold disks, larger caches
  become important
* f7 commits are slower by usually ~5% with some variation

Settings (all uniform for all repos and storage devices):
* default - duh
* medium - 256MB cache
* fast - 1GB cache, revprop caching, bells & whistles

Numbers are the usual "elapsed, user, sys" in seconds.

-- Stefan^2.

Received on 2014-06-23 23:45:51 CEST

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