Interesting,
I had assumed the cause of my problem was de-dup because the symptoms are
similar to what others have reported destroying their deduped datasets, but
their system hangs didn't happen for hours while my system hard locks in 3 to 4
minutes. But now you have me thinking because the d
Fast is a relative term, because even after the first write to the end, they
are still really fast for a small server and the latency is still low <1ms
which is often more important than throughput. The topic said poor mans slog.
The vertexes can be had for $100 and the vertex turbo a little mo
Myself and others had good luck with the OCZ vertex. I use two 30GB versions
and they have very high write and read throughputs for such a cheap MLC.
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h
Did you happen to set dedup on that zvol that you destroyed? Your symptoms
sound just like mine. Check out the threads concerning losing a pool after
destroying a deduped dataset. There's 3 or 4 of them. I get heavy read
activity for about 4 minutes and then the systems just hangs and I can'
Bump.
Any devs want to take him up on his offer, obviously this is effecting a few
users and judging from the view counts of the other threads about this problem,
many more. This would probably effect the 7000 series as well.
Thanks.
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I'm also curious, but for b130 of Opensolaris. Any way to try to import a pool
without the log device? Seems like the ability to rollback of the pool
recovery import should help with this scenario if you are willing to take data
loss to get to a consistent state with a failed or physically rem
In this last iteration, I switched to a completely different box with twice the
resources. Somehow, from the symptoms, I don't think trying it on one of the
48 or 128GB servers at work is going to change the outcome. The hang happens
too fast. it seems like something in the destroy is causing
> If pool isnt rpool you might to want to boot into
> singleuser mode (-s after kernel parameters on boot)
> remove /etc/zfs/zpool.cache and then reboot.
> after that you can merely ssh into box and watch
> iostat while import.
>
> Yours
> Markus Kovero
>
> ___
You might want to checkout another thread that me and some of the others
started on this topic. some of the guys in that thread got their pool back but
I haven't been able to. I have SSDs for my log and cache and it hasn't helped
me because my system hangs hard on import the way you are describ
That's the thing, the drive lights aren't blinking, but I was thinking maybe
the writes are going so slow that it's possible they aren't registering. And
since I can't keep a running iostat, Ican't tell if anything is going on. I
can however get into the KMDB. is there something in there that
Yeah, still no joy. I moved the disks to another machine altogether with 8gb
and a quad core intel versus the dual core amd I was using and it still just
hangs the box on import. this time I did a nohup zpool import -fFX vault after
booting off the b130 live dvd on this machine into single user
Yeah, still no joy on getting my pool back. I think I might have to try
grabbing another server with a lot more memory and slapping the HBA and the
drives in that. Can ZFS deal with a controller change?
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> I booted the snv_130 live cd and ran zpool import
> -fFX and it took a day, but it imported my pool and
> rolled it back to a previous version. I haven't
> looked to see what was missing, but I didn't need any
> of the changes over the last few weeks.
>
> Scott
I'll give it a shot. Hope this
4 Gigabytes. The hang on my system happens much faster. I can watch the drives
light up and run iostat but 3 minutes in like clockwork everything gets hung
and I'm left with a blinking cursor at the console that newlines but doesn't do
anything. Although if I run kmdb and hit f1-a I can get int
I am having the exact same problem after destroying a dataset with a few
gigabytes of data and dedup. I type zfs destroy vault/virtualmachines which
was a zvol with dedup turned on and the server hung, couldn't ping, couldn't
get on the console. Next bootup same thing just hangs when importing
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