Article View: comp.sys.sequent
Article #184tunefs parameters for swallow / eagle on DCC?
From: Jef Poskanzer
Date: Sat, 18 Nov 1989 05:40
Date: Sat, 18 Nov 1989 05:40
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1481 bytes
We have a Balance-8 with two Swallow drives and three Eagle drives
running off the DCC. The filesystems have never been tuned, so last
night during some scheduled downtime I did a little playing around with
tunefs and write/read timings. Here's the data I took for the Swallows:
KB/s rotdel 0 1 2 3 4 5 6
maxcont
1 394 469 466 458 464 560 560
2 395 459 465 457 460 448 453
3 406 450 391 393 433 414 421
4 393 125 151 157 361 410 404
8 386 404 399 401 409 394 398
32767 376 467 474 467 468 575 585
I didn't get as much data for the Eagles, but what I did get has the
same shape as the above. It looks like I need to explore higher
rotdelays, which surprises me, and higher maxcontigs, which doesn't
surprise me.
Has anyone out there already done a thorough tune-up for Swallows
or Eagles? I'd be interested in hearing what parameters you settled
on.
---
Jef
Jef Poskanzer jef@well.sf.ca.us {ucbvax, apple, hplabs}!well!jef
"It's the end of the world as we know it, and I feel fine."
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arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!gem.mps.ohio-state.edu!usc!apple!well!jefShow Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!gem.mps.ohio-state.edu!usc!apple!well!jef From: jef@well.UUCP (Jef Poskanzer) Newsgroups: comp.sys.sequent Subject: tunefs parameters for swallow / eagle on DCC? Message-ID: <14613@well.UUCP> Date: 18 Nov 89 05:40:40 GMT Reply-To: Jef Poskanzer <jef@well.sf.ca.us> Organization: Paratheo-Anametamystikhood Of Eris Esoteric, Ada Lovelace Cabal Lines: 29