[maemo-developers] metalayer-crawler - good idea?
From: Frantisek Dufka dufkaf at seznam.czDate: Tue Apr 3 22:06:52 EEST 2007
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Eero Tamminen wrote: > Hi, > > ext Frantisek Dufka wrote: >> When rootfs is on mmc >> I can see frantic activity of mmcqd kernel deamon (doing writes?) for >> couple of minutes when booting or inserting the card (2 GB of mp3 files). > > Crawler doesn't write to the MMC, it only reads it (it writes to sqlite > database in /home/user). I think part of the badness is due to libid3. > You can see this with strace. It does when rootfs is on mmc. Together with scanning same card (but different partition) it is lot of I/O on same device. Luckily there are no heads in the card :-) This also means maybe the metalayer-crawler is not very healhy for internal flash wear too. Oh, yes we finally have strace for arm in bora 3.1, right? Will try. > > Ditto. I personally liked the 770 player more. > Well, perhaps the library idea is a bit flawed for removable devices and does not scale well with bigger media? Or can it fly in limited device like this? How does ipod and other players solve this? Perhaps doing it in desktop software I guess. As for improvement, maybe you can scan just the filenames and do some hash (for card or whole directories) and if there is nothing new do not parse files inside at all? Will try strace before firing random ideas. Frantisek
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