Tuesday, 2015-09-01

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cbrakewhat do you typically use for storage on MBM?  I'm running Ubuntu from SD card right now, and its very slow18:54
cbrakeare there SATA flash drives that do better?  Or USB3 flash disk?18:55
cbrakealso wondering if the Ubuntu kernel (14.04) is not optimized or something18:56
bradfacbrake, try a better SD card or get yourself an msata drive and the silverjaw lure18:57
jimt1^^^^^18:57
bradfacbrake, sd card performance can very dramatically, and do not trust the "Class" system, it's utter lies for use with a root file system18:57
bradfacbrake, if you can find a Samsung Pro series (iirc) or SanDisk Ultra Mobile SD card, those are pretty decent (but I last checked about 2 years ago, so they may be crap now)18:58
bradfayou are at the mercy of consumer electronics and a race to the bottom, if you use an SD card18:58
cbrakebradfa: yeah, we've had really good luck with Transcend SD cards on other projects (what I'm using now)18:59
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cbrakebradfa: that is why I'm surprised its not doing very well in this app18:59
bradfacbrake, are you using ext4 or btrfs?19:00
cbrakebut those are OE based distros, so relatively light compared to u14.0419:00
cbrakebradfa: ext419:00
bradfacbrake, if you have time and don't mind running some destructive tests (to data, not the card itself), try out flashbench onyour cards to see how they do: https://lwn.net/Articles/428584/19:01
bradfacbrake, you can ask questions and report results on the flashbench-results ml (it's very low traffic and if you attempt to follow instructions the people are very helpful) https://lists.linaro.org/mailman/listinfo/flashbench-results19:01
cbrakebradfa: thanks for the ideas19:02
* bradfa is on flashbench-results, tries to help when he can19:02
bradfacbrake, for example, flashbench runs will look like: https://lists.linaro.org/pipermail/flashbench-results/2012-August/000326.html19:03
bradfacbrake, this one benchmarked well but in real world use was slower than Sandisk Mobile Ultra microSD cards I also was using at the time: https://lists.linaro.org/pipermail/flashbench-results/2012-August/000322.html19:04
bradfanot sure why19:04
bradfaSD cards are fickle beasts19:04
cbrakenod19:04
cbrakeI only have a 8G card, so it may be too full to perform well (250MB free)19:04
cbrakeshould try a 16G19:05
bradfacbrake, but I have a custom board based on E38xx with a Toshiba eMMC and it's quite quick even when running Ubuntu, so likely your card is just not great19:05
jimt1eMMC is the future here19:05
bradfaraw NAND with UBIFS is the future, here :)19:05
bradfaeMMC is also a fickle beast, and good luck when the vendor actually gives you the errata sheet :)19:06
bradfaeverywhere be dragons!19:06
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jimt1buying 1  yes, the vendor won't listen.  buying 1k+, no problem19:07
bradfajimt1, s/1k+/1M+/ :)19:08
jimt1(today's linux people remind me of windows people a decade ago)19:08
jimt1no, I can get actual errata out of e.g. Kingston at 1ku19:08
bradfajimt1, yeah?  oh, interesting...19:10
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