Date: Thu, 24 Feb 2011 20:28:16 +0100 From: Piotr Kucharski <piotr.kucharski@42.pl> To: freebsd-fs@freebsd.org Subject: Re: very slow zfs scrub Message-ID: <AANLkTik%2BUhMSfGgNPr=qd_Rfwb-12aXHWGAJnNGQH2j=@mail.gmail.com> In-Reply-To: <AANLkTimDqcdNv0DqyScEQU3Fw=t9xtOaAZqy2BfWNhpw@mail.gmail.com> References: <AANLkTim6z5KiceXQE-DHt51TBs%2BSO8NNLpi7fYBTwXpE@mail.gmail.com> <AANLkTimDqcdNv0DqyScEQU3Fw=t9xtOaAZqy2BfWNhpw@mail.gmail.com>
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I've eliminated GELI from the picture and simplified the setup to one
ggate disk.
# ggatec create -u 13 x.x.x.x /dev/zvol/storage/zvol/temp
# zpool create testink /dev/ggate13
: copied some files onto it, 10G took 40 min, but it was from one
network drive to another, I'll let it slide
# dd if=/testink/file of=/dev/null bs=64k
128712704 bytes transferred in 2.256507 secs (57040687 bytes/sec)
: reading is as I expected to be, fine
# zpool scrub testink
: wait a little for the command to finish
# zpool status testink
pool: testink
state: ONLINE
scan: scrub in progress since Thu Feb 24 17:45:27 2011
227M scanned out of 9.97G at 27.9K/s, 101h52m to go
0 repaired, 2.22% done
config:
NAME STATE READ WRITE CKSUM
testink ONLINE 0 0 0
ggate13 ONLINE 0 0 0
Wow! What does scrub do that it slows ggate drive almost to halt?
What can I do to fix it?
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