[9fans] Growing a venti

[9fans] Growing a venti

[Dave Eckhardt]

It seems as if the steps to add data arenas are:

1. Format them with fmtarenas
2. Append them to the arena list in venti.conf
3. fmtindex -a

And the steps for adding index sections are:

1. Format with fmtisect
2. Add them to the list in venti.conf
3. fmtindex
4. buildindex

I assume that fmtindex and buildindex need to
be run with venti shut down... how do people
usually do this?  Boot against some other
file server, such as a TIP9UG account?

What size should be given to buildindex -B?
More or less all of physical memory?

Dave Eckhardt

Re: [9fans] Growing a venti

[Steve Simon]

What you describe is what what I understand you should do.

When I rebuilt my index I booted from cdrom; The ISO on sources
can boot as an install CD or as a standalone live system.
I didn't use the -B option to buildindex though it may
have completed faster if I had.

I wrote about my experiences in:

/n/sources/steve/Venti-rescue.tbl
http://www.quintile.net/Venti-rescue.html

-Steve

[9fans] dosmnt

[arisawa]

Hello,

dosmnt does not work correctly.
because
term% echo /dev/sd*/dos*
/dev/sdC0/dos /dev/sdC0/dos /dev/sdD0/dos /dev/sdD0/dos

current codes are:

term% cat /bin/dosmnt
#!/bin/rc

rfork e
if(! ~ $#* 2){
         echo 'usage: dosmnt N mntpt' >[1=2]
         exit usage
}

x=(`{echo /dev/sd??/dos*})
if(test $#x -lt $1){
         echo 'not that many dos disks' >[1=2]
         exit usage
}

if(! test -f /srv/dos)
         dossrv >/dev/null </dev/null >[2]/dev/null

mount -c /srv/dos $2 $x($1)
term%


The fix is to replace last line
         mount -c /srv/dos $2 $x($1)
to
         g=$x(1)
         for(f in $x)
                 if(! ~ $f $g) g=($g $f)
         mount -c /srv/dos $2 $g($1)


Kenji Arisawa

Re: [9fans] dosmnt

[Russ Cox]

> The fix is to replace last line

the real fix is not to bind '#S' onto /dev twice.
but i changed dosmnt anyway.

russ

Re: [9fans] dosmnt

[arisawa]

Hello,

> the real fix is not to bind '#S' onto /dev twice.

I agree.
But why Kernel shows same things twice?

Kenji Arisawa

Re: [9fans] dosmnt

[YAMANASHI Takeshi]

> > the real fix is not to bind '#S' onto /dev twice.
> But why Kernel shows same things twice?

This thread might be helpful:
	http://lists.cse.psu.edu/archives/9fans/2003-March/023167.html
--

Re: [9fans] dosmnt

[arisawa]

Hello,

>>> the real fix is not to bind '#S' onto /dev twice.
>> But why Kernel shows same things twice?
>
> This thread might be helpful:
> 	http://lists.cse.psu.edu/archives/9fans/2003-March/023167.html
>

Thanks. Great help! In the article Russ says:

> Ls tells the truth!  I see no value in causing it to lie.

I agree completely !
Ls should show as kernel told ls.
Therefore the problem is not in ls.
Kernel shows ghosts -- just my impression.

Kenji Arisawa

Re: [9fans] dosmnt

[arisawa]

Hello,

I said:

> Kernel shows ghosts -- just my impression.

I considered the problem.
My conclusion is:
/dev is a virtual place.
therefore dosmnt should be fixed as bellow:
simply replace
x=(`{echo /dev/sd??/dos*})
to
x=(`{echo '#S'^/sd??/dos*})

Kenji Arisawa

Re: [9fans] dosmnt

[Charles Forsyth]

[-- Attachment #1: Type: text/plain, Size: 186 bytes --]

you might have imported devices from somewhere else
to the local /dev

generally it's best to avoid using # names unless it's
essentially to know you're dealing with a local thing.

[-- Attachment #2: Type: message/rfc822, Size: 2589 bytes --]

From: arisawa@ar.aichi-u.ac.jp
To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu>
Subject: Re: [9fans] dosmnt
Date: Fri, 25 Feb 2005 19:40:26 +0900
Message-ID: <1d7da70b9aac8ec0df2c333c9c69d300@ar.aichi-u.ac.jp>

Hello,

I said:

> Kernel shows ghosts -- just my impression.

I considered the problem.
My conclusion is:
/dev is a virtual place.
therefore dosmnt should be fixed as bellow:
simply replace
x=(`{echo /dev/sd??/dos*})
to
x=(`{echo '#S'^/sd??/dos*})

Kenji Arisawa

Re: [9fans] dosmnt

[arisawa]

Hello,

> you might have imported devices from somewhere else
> to the local /dev

we have this problem...

term% cpu -h hera
hera% ls -l /dev
....
d-r-xr-xr-x M 8967 arisawa arisawa       0 Feb 16 12:57 /dev/sdC0
d-r-xr-xr-x S    0 bootes  bootes        0 Dec 28 14:07 /dev/sdC0
d-r-xr-xr-x M 8967 arisawa arisawa       0 Feb 16 12:57 /dev/sdC0
d-r-xr-xr-x M 8967 arisawa arisawa       0 Feb 16 12:57 /dev/sdC1
d-r-xr-xr-x M 8967 arisawa arisawa       0 Feb 16 12:57 /dev/sdC1
d-r-xr-xr-x M 8967 arisawa arisawa       0 Feb 16 12:57 /dev/sdD0
d-r-xr-xr-x S    0 bootes  bootes        0 Dec 28 14:07 /dev/sdD0
d-r-xr-xr-x M 8967 arisawa arisawa       0 Feb 16 12:57 /dev/sdD0
d-r-xr-xr-x M 8967 arisawa arisawa       0 Feb 16 12:57 /dev/sdD1
d-r-xr-xr-x M 8967 arisawa arisawa       0 Feb 16 12:57 /dev/sdD1
...
hera%

we see mixed devices.

what do we expect by
hera% c:
or by
hera% d:
?

Kenji Arisawa

Re: [9fans] dosmnt

[Russ Cox]

ls /dev/sd*/dos | uniq
gives you a list of dos partitions.
the first is c:, the second is d:, etc.

russ

Re: [9fans] dosmnt

[Aharon Robbins]

Maybe use    sort -u     to remove duplicates?

Arnold