Messages in this thread | ![/](/images/icornerl.gif) | | Date | Tue, 30 Dec 2003 12:56:32 -0700 | From | "Eric D. Mudama" <> | Subject | Re: [PATCH] 2.6.0 - Watchdog patches (BK consistency checks) |
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On Tue, Dec 30 at 13:13, Andy Isaacson wrote: >On Tue, Dec 30, 2003 at 08:36:15AM -0500, Ed Tomlinson wrote: >The consistency check definitely should not take 15 minutes. It should >be (much) less than 30 seconds. What is the hardware you're running on? > >I'm running on an Athlon 2 GHz (XP 2400+) with 512MB and a 7200RPM IDE >disk, and I can do a complete clone (with full data copy and consistency >check) of the 2.4 tree in 1:40. That was with cold caches; with the >sfile copies and "checkout:get", a half-gig isn't enough to cache >everything. The consistency check is about 19 seconds (bk -r check -acv).
For what it is worth:
AMD Duron 950MHz, 768MB RAM 7200RPM 80GB Quantum Viper IDE drive, 26% full
phat-penguin:~/src/linux-2.5> time bk -r check -acv 100% |=================================================================| OK 42.710u 5.770s 2:04.63 38.8% 0+0k 0+0io 74078pf+0w
over 2 minutes of wall time, 42 seconds of "user" time... (if I'm reading it right), without primed disk caches.
The 2nd run, half a minute later:
phat-penguin:~/src/linux-2.5> time bk -r check -acv 100% |=================================================================| OK 41.900u 3.080s 0:45.53 98.7% 0+0k 0+0io 74078pf+0w
...would appear to show that BK's checksumming, on my system, is constrained near 41 seconds of calculation time, and the difference between the user and the wall-clock time is basically time spent waiting for the disk to do all its reads.
I guess in that case, it'd be interesting to see what the user and wall times were for the original poster who reported a 15+ minute integrity check.
--eric
-- Eric D. Mudama edmudama@mail.bounceswoosh.org
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