-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 08/04/2011 01:46 PM, James Tunnicliffe wrote: > Hi, > > Our current default root file system, ext3, is proving to be a > bottleneck for SD card performance. Not only does it take a long time > to format the partitions, but it also takes a long time to write to. > This slows down creating images on SD cards a lot. I just did a very > simple experiment running linaro-media-create, writing an Ubuntu > Desktop image to an SD card: > > ext3: > 139.85user 35.27system 44:03.58elapsed 6%CPU (0avgtext+0avgdata > 107360maxresident)k > 2876115inputs+7048200outputs (958major+1677659minor)pagefaults 0swaps > > btrfs: > 146.52user 34.48system 19:57.16elapsed 15%CPU (0avgtext+0avgdata > 107408maxresident)k > 4417521inputs+6542992outputs (138major+1779874minor)pagefaults 0swaps > > As I understand it, btrfs is considered OK for file systems running on > systems that don't suffer from power failure, so for writing an image > and testing it this should be fine. > > So, what do people think about switching?
IMHO it is not stable enough and I am not sure it is worth having such filesystem as it is mainly used for snapshotting. The last time I played with it, the FS was quickly corrupted but I don't have to complain because the kernel configuration help was explicit enough :) "Btrfs is highly experimental, and THE DISK FORMAT IS NOT YET FINALIZED. You should say N here unless you are interested in testing Btrfs with non-critical data." -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJOOot+AAoJEAKBbMCpUGYAYB4H/13CMOSsPFoxypWFcV9UfqzE Ni7WTmiiWDRWlcZVUwGIInwJVs/DIb5liVqT+qn7zlQ0kp0++lTFk3VEl28DoKej q1yvWwews9t8RddFYQrgb4LSzEJuQzDeTZyT1tIexSNihJMLa+nUvhsEwwrPlFCn hPF5pBeFze2uXOrvJ0e/tSlBQ7vIdWoXnz4CZJRH13HvaqHjD0c7qq1/hNQv2mWi qel49BuDI4uucODuEKOw3eof1YLAh/l6F29sqpBKzRWEmRMBgpnGpAbzjawMtpRg 4tyGmFOX4A3zSODMr2c2+PFEZiovzJUaKV0vPew+8GoIyE/cOUzx1amJxvMMMDw= =5D2R -----END PGP SIGNATURE----- _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
