Date: Wed, 25 Apr 2001 09:52:23 -0500 From: Broc Seib <bseib@icd.cc.purdue.edu> To: freebsd-stable@FreeBSD.ORG Cc: bseib@icd.cc.purdue.edu Subject: Re: Dump very slow in 4.3-RELEASE? Message-ID: <200104251452.JAA18392@icd.cc.purdue.edu> In-Reply-To: Your message of "Wed, 25 Apr 2001 17:39:37 %2B0300." <20010425173937.A34506@sunbay.com>
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Maybe related... ? I now notice that my rdists between two 4.3-STABLE machines goes *extremely* slow, by two orders of magnitude! The 'top' command shows the receiving machine is blocking on "sbwait". Is your amanda process blocking on the same "sbwait" in the kernel by chance? I don't see this slow behavior when rdist-ing btween the 4.3-STABLE machine and my old 2.2.8 machine. -b > More to that... > > Yesterday I've got larged HDD, and used ``dump -0 -f- | restore -r -f-'' > to move the data (on yesterday's 4.3-STABLE). > > Is it normal that the speed was 170Kb/s, as reported by dump(8)? > > On Wed, Apr 25, 2001 at 07:28:39AM -0700, Nick Sayer wrote: > > Amanda has begun timing out one of my slower clients. I have tracked this > > down and it appears to be the fact that generating the estimates takes > > much, much longer now than it used to. > > > > Amanda estimates the amount of space a backup will take by actually starti ng > > the backup, waiting for the estimate line that follows the end of Pass II, > > then killing the backup. The problem is that for an unknown reason, Pass I I > > is now taking an incredibly long time. > > > > For example: > > > > Filesystem 1K-blocks Used Avail Capacity iused ifree %iused M ounted on > > /dev/ad0s1e 1744767 1024514 580672 64% 167453 269025 38% / usr > > dial%df /usr > > Filesystem 1K-blocks Used Avail Capacity Mounted on > > /dev/ad0s1e 1744767 1024514 580672 64% /usr > > > > Just getting the estimate line for a level 1 on this filesystem takes a > > half hour (CPU is a K6-233, disk is using UDMA33). > > > > Does this have something to do with the changes made to support hierarchic al > > nodump processing? I have some trees on this fs that in the past I have > > done a chflags -R nodump on. Might this be causing dump some heartburn? > > -- > Ruslan Ermilov Oracle Developer/DBA, > ru@sunbay.com Sunbay Software AG, > ru@FreeBSD.org FreeBSD committer, > +380.652.512.251 Simferopol, Ukraine > > http://www.FreeBSD.org The Power To Serve > http://www.oracle.com Enabling The Information Age > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-stable" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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