anyone using ZFS for real?

2007-08-10 Thread Wojciech Puchar

on FreeBSD 7.0

i mean is it stable enough to be used on FreeBSD/amd64

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Re: anyone using ZFS for real?

2007-08-10 Thread Peter Ankerstål

Wojciech Puchar wrote:

thanks for quick answers. i will definitely take a risk after reading
all of this.
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I've used it on my laptop since it was released for FreeBSD but what do 
you mean real? Production environment?

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Re: anyone using ZFS for real?

2007-08-10 Thread Wojciech Puchar

thanks for quick answers. i will definitely take a risk after reading
all of this.
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Re: anyone using ZFS for real?

2007-08-10 Thread Craig Boston
On Fri, Aug 10, 2007 at 12:27:49PM +0200, Wojciech Puchar wrote:
 on FreeBSD 7.0
 
 i mean is it stable enough to be used on FreeBSD/amd64

It depends what you mean by real.

I'm using it for everything (including root) on several systems:

1 amd64 machine in a desktop role
* single SATA disk

1 i386 machine in a server role (with only 512MB RAM)
* raidz over 3 ATA100 disks

4 i386 machines in desktop roles
* two are single disk setups
* one is a 3 disk raidz (SATA)
* one is a 1GB compactflash card in a PCMCIA converter
  (diskless laptop)

1 bootable USB flash memory stick (i386 kernel) that I sometimes
  plug in to random machines.  It's a 2GB stick and is configured
  with lots of desktop stuff but is also handy for hardware tests
  and recovering stuff off broken windows machines.  gzip
  compression really shines here

I also have a couple of external USB hard drives that have a zpool on
them.  One of them is geli encrypted.  The other holds the src/obj/ports
filesystems for my flash-based systems, so it gets plugged in and zpool
import/export'd a lot when there are updates.

My recipe generally involves setting vm.kmem_size to somewhere between
1/3 and 1/2 of physical RAM size, and reducing kern.maxvnodes to
somewhere between 1/2 and 2/3 of its autotuned value.  I sometimes
disable prefetch, but honestly I can't tell a difference between it
being on or off.

Craig
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Re: anyone using ZFS for real?

2007-08-10 Thread Nikos Vassiliadis
On Friday 10 August 2007 13:27, Wojciech Puchar wrote:
 on FreeBSD 7.0

 i mean is it stable enough to be used on FreeBSD/amd64

See the relative thread. I recall that amd64 and at least
1GB of RAM were recommended.

http://lists.freebsd.org/pipermail/freebsd-current/2007-June/073972.html

Nikos




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Re: anyone using ZFS for real?

2007-08-10 Thread Peter Ankerstål

Wojciech Puchar wrote:

thanks for quick answers. i will definitely take a risk after reading
all of this.
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Sorry. Heh. I missed the Re: and the rest of the thread.
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Re: anyone using ZFS for real?

2007-08-10 Thread Vince
I've been using it just for the /usr/ports on my i386 laptop for a while
(dual core T2300  @ 1.66GHz with 1 gig Ram:)

([EMAIL PROTECTED])$sudo zpool history tank
History for 'tank':
2007-04-11.10:45:56 zpool create tank ad0s4a
2007-04-11.10:46:35 zfs create tank/ports
2007-04-11.10:47:06 zfs set compression=gzip tank/ports
2007-04-11.10:53:29 zfs set mountpoint=/usr/ports tank/ports
2007-05-11.09:31:37 zpool scrub tank
2007-08-08.12:31:44 zpool scrub tank
2007-08-09.14:51:52 zfs set atime=off tank

with no issues.
With appropriate tuning I also now run my home server (personal email
server, samba and nfs server for music/video/documents) which is again
i386 with 3 gigs memory with /usr and /var on zfs mirrors.

for this I did have to set
kern.maxvnodes=4
vfs.zfs.zil_disable=1
vfs.zfs.prefetch_disable=1
vfs.zfs.arc_max=83886080
vm.kmem_size_max=536870912

for it to survive a portsnap fetch  portsnap extract without running
out of kernel memory. since then its run with no issues. I'm told that
FreeBSD/amd64 is a better choice for zfs though as with a 32bit kernel
you are more likely to experience problems with KVA shortage than you
are RAM shortage when using ZFS.
Also see the thread starting:
http://lists.freebsd.org/pipermail/freebsd-current/2007-June/073972.html
for reports from people using it (back in zune true but its only going
to have improved since :)


Vince



Wojciech Puchar wrote:
 on FreeBSD 7.0
 
 i mean is it stable enough to be used on FreeBSD/amd64
 
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