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Date:      Fri, 16 Jan 2009 09:05:48 -0500 (EST)
From:      "B. Cook" <bcook@poughkeepsieschools.org>
To:        freebsd-questions@freebsd.org
Subject:   zfs on i386 trauma :P
Message-ID:  <9c7e8a84da1d469df4d8155b88f59c39.squirrel@mail.poughkeepsieschools.org>

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Hello all,

We had a raid card die in a dell box and reinstalled FreeBSD 7 and
restored from backups.. the problem is amd64 didn't boot on the box and
the person doing the restore wanted to 'help' and changed from ufs2 to
zfs..

while being a noble effort, he was testing on amd64 and "didn't think"
that amd64 to i386 was that big a deal for zfs.. *sigh*

So here we are.. if I can't figure out how to make this 'stable' I will
dump and restore and reinstall i386 ufs2/gmirror..

So we have a box w/ 3G of ram running samba and squid for a few hundred
people.

I have tried to fix /boot/loader.conf:
# cat /boot/loader.conf
autoboot_delay="4"
vm.kmem_size_max="1024M"
vm.kmem_size="1024M"

zfs_load="YES"
vfs.zfs.prefetch_disable=1
vfs.root.mountfrom="zfs:tank/root"

accf_http_load="YES"
accf_data_load="YES"

and rebuilt the kernel with many device drivers disabled..

I found a script on the zfs tuning page on the wiki, but I do not
understand what it is telling me..

TEXT=7031512, 6.70577 MB
DATA=514754560, 490.908 MB
TOTAL=521786072, 497.614 MB

kldstat yeilds this output:
Id Refs Address    Size     Name
 1    9 0x80400000 55f3e8   kernel
 2    1 0x80960000 b23b0    zfs.ko
 3    2 0x80a13000 23bc     opensolaris.ko
 4    1 0x80a16000 191c     accf_data.ko
 5    1 0x80a18000 22d4     accf_http.ko
 6    1 0x80a1b000 68394    acpi.ko
 7    1 0x87ecb000 3000     pflog.ko
 8    1 0x87ed7000 32000    pf.ko

We have updated to 7.1-p2 with the hopes of fixing somethings..

So the problems that we are having is that the machine stops responding..
ping never stops, it just stops answering tcp requests.

and we only have a few minor tweaks in sysctl.conf:

security.bsd.see_other_uids=0

net.inet.ip.random_id=1
kern.randompid=32768
kern.coredump=0

net.inet.tcp.delayed_ack=0
net.inet.tcp.inflight.enable=0
net.inet.tcp.path_mtu_discovery=0
net.inet.tcp.recvbuf_auto=1
net.inet.tcp.rfc1323=1
net.inet.tcp.sendbuf_auto=1

and in rc.conf we have set some things on the bge0 interface:

ifconfig_bge0="inet 10.20.0.230 netmask 255.255.254.0 rxcsum txcsum media
1000baseTX mediaopt full-duplex polling"

Is there something that is set, that is making the system stop responding?

is there something else that could be done?

If stability and performace are the goals (in that order) would it just
make sense to reinstall and go back to gmirror on ufs2?

Thanks in advance.




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