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Which filesystem for target?
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Chris Tapp
A bit of an open-ended question, but...
Which is the 'best' filesystem to use for an embedded device that's using a CF card? It needs to survive loss-of-power, have a RO root filesystem, allow user configuration data to persist and (ideally) only use 'Busybox' commands. This seems to imply the use of a partition for booting (mount RO) and a second partition or a loop-device on the boot partition for persistent storage. I would normally go for ext3, but Busybox doesn't support it (afaik). The Busybox tune2fs also only supports -L, so I can't stop 'disk needs checking after <n> mounts' messages. Is btrfs a suitable alternative? Chris Tapp opensource@... www.keylevel.com |
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David Stewart
Anybody got an answer for Chris?
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(A lot of folks are traveling back from a conference, Chris, so might explain slowness) Sent from my Blackberry ----- Original Message -----
From: Chris Tapp [mailto:opensource@...] Sent: Friday, October 28, 2011 03:11 PM To: yocto@... <yocto@...> Subject: [yocto] Which filesystem for target? A bit of an open-ended question, but... Which is the 'best' filesystem to use for an embedded device that's using a CF card? It needs to survive loss-of-power, have a RO root filesystem, allow user configuration data to persist and (ideally) only use 'Busybox' commands. This seems to imply the use of a partition for booting (mount RO) and a second partition or a loop-device on the boot partition for persistent storage. I would normally go for ext3, but Busybox doesn't support it (afaik). The Busybox tune2fs also only supports -L, so I can't stop 'disk needs checking after <n> mounts' messages. Is btrfs a suitable alternative? Chris Tapp opensource@... www.keylevel.com _______________________________________________ yocto mailing list yocto@... https://lists.yoctoproject.org/listinfo/yocto |
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Paul Eggleton
On Friday 28 October 2011 23:11:22 Chris Tapp wrote:
Which is the 'best' filesystem to use for an embedded device that'sArnd Bergmann gave a talk at ELCE on flash drive performance (something he has done quite a lot of research on); I did not attend but Darren and I spoke to him later on, and if I recall correctly in his tests btrfs performed the best. Hopefully the talk video will be available soon thanks to the folks at Free Electrons; in the mean time there's an earlier article by Arnd on this topic here: http://lwn.net/Articles/428584/ Cheers, Paul -- Paul Eggleton Intel Open Source Technology Centre |
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Chris Tapp
On 31 Oct 2011, at 10:16, Paul Eggleton wrote:
On Friday 28 October 2011 23:11:22 Chris Tapp wrote:Thanks, that's a very good article that may explain some issues I've been seeing.Which is the 'best' filesystem to use for an embedded device that'sArnd Bergmann gave a talk at ELCE on flash drive performance (something he has Chris |
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