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Date:      Mon, 03 Jan 2011 14:24:37 +0100
From:      Ivan Voras <ivoras@freebsd.org>
To:        freebsd-stable@freebsd.org
Subject:   Re: tmpfs runs out of space on 8.2pre-release, zfs related?
Message-ID:  <ifsiml$95n$1@dough.gmane.org>
In-Reply-To: <AANLkTikeN1BqoYwtvSzUaXek5F8VMU9X=BssOLkFFMkx@mail.gmail.com>

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On 01/02/11 09:41, miyamoto moesasji wrote:
> miyamoto moesasji<miyamoto.31b<at>  gmail.com>  writes:
>
>>
>> In setting up tmpfs (so not tmpmfs) on a machine that is using
>> zfs(v15, zfs v4) on 8.2prerelease I run out of space on the tmpfs when
>> copying a file of ~4.6 GB file from the zfs-filesystem to the memory
>> disk. This machine has 8GB of memory backed by swap on the harddisk,
>> so I expected the file to copy to memory without problems.
>>
>
> ....this is in fact worse than I first thought. After leaving the
> machine running overnight the tmpfs is reduced to a size of 4K, which
> shows that tmpfs is in fact
> completely unusable for me. See the output of df:
> ---
> hge@PulsarX4:~/>  df -hi /tmp
> Filesystem    Size    Used   Avail Capacity iused ifree %iused  Mounted on
> tmpfs         4.0K    4.0K      0B   100%      18     0  100%   /tmp

This is a known problem. So far, no solution has been offered, which 
means that effectively, tmpfs cannot be used with ZFS on the same system.




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