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Date:      Tue, 1 Jul 2014 11:46:19 +0100 (BST)
From:      Anton Shterenlikht <mexas@bris.ac.uk>
To:        mexas@bris.ac.uk, rene@freebsd.org
Cc:        freebsd-arm@freebsd.org
Subject:   Re: /tmp, /var/log, /var/tmp as /dev/md - why?
Message-ID:  <201407011046.s61AkJpj006890@mech-cluster241.men.bris.ac.uk>
In-Reply-To: <CADL2u4g65eo=7xxAt9j8JumyWneouhM2MGpcA9kfxJaCFWg95Q@mail.gmail.com>

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>From r.c.ladan@gmail.com Tue Jul  1 11:37:35 2014
>
>2014-07-01 11:25 GMT+02:00 Anton Shterenlikht <mexas@bris.ac.uk>:
>
>> Why is it a good idea to mount /tmp and some var dirs on memory disks:
>>
>> root@raspberry-pi:/usr/ports # df -m
>> Filesystem     1M-blocks Used Avail Capacity  Mounted on
>> /dev/mmcsd0s2a     14694  777 12742     6%    /
>> devfs                  0    0     0   100%    /dev
>> /dev/mmcsd0s1         16    3    13    20%    /boot/msdos
>> /dev/md0              28    4    22    16%    /tmp
>> /dev/md1              14    0    12     0%    /var/log
>> /dev/md2               4    0     4     0%    /var/tmp
>> root@raspberry-pi:/usr/ports #
>>
>> Is this about speed or power, or maybe space?
>>
>> Mostly write tear because you're using an SD card, and it improves speed
>too.

"write tear"?
Is this a joke, or some technical term?
I cannot find what it means.

I get these messages on the console (well, on hdmi port...):

pid ... (svnlite), uid 0 inumber 13 on /tmp: filesystem full

If I unmount /tmp from md and leave it on sd card,
then I don't see these anymore. What does this mean?

Thanks

Anton



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