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Thread: The Good & Bad Of Btrfs In A Production World

  1. #11
    Join Date
    Oct 2012
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    Quote Originally Posted by Baconmon View Post
    Umm.. BTRFS isn't ready for production environments yet, so why is that company complaining about it?.. BTRFS isn't officially stable yet.. Hell, even I am not going to switch to BTRFS until it is stable, and I am just a normal desktop user with nothing important on my computer.. And I have backups..

    However, having said that, I think when BTRFS finally IS stable, it will literally be the coolest and best file-system on earth..
    no one is complaining... *sigh*

    they did an analysis oriented on their needs at decided to share their findings. what's wrong with this? better say thank you for the time and work in doing this.

    critics or naming issues is not equal to complaining!!!!!!!

  2. #12
    Join Date
    Sep 2009
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    Quote Originally Posted by mercutio View Post
    what happened to lz4? lz4 should be even better.
    It's not merged yet:
    https://btrfs.wiki.kernel.org/index....merged_Patches

    It was very active just 2 months ago. It may make it in yet.

  3. #13
    Join Date
    Nov 2008
    Posts
    418

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    LZ4 is made by FreeBSD developers. Another win for open source if Linux adopts LZ4!

    Interesting story by Anchor. Sad they switched to ext4 at the end, because of all problems....

  4. #14
    Join Date
    Jan 2009
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    Vienna, Austria; Germany; hello world :)
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    not sure how btrfs could be used in production:

    for the past 2-3 (?) years I've been trying to use btrfs on (additional) data backup partitions, my home partition and since then it only has somewhat managed to persist on my portage-partition

    one of the reasons is that every now and then I get errors like the following:

    [ 248.887953] btrfs: use lzo compression
    [ 248.887961] btrfs: enabling inode map caching
    [ 248.887964] btrfs: not using ssd allocation scheme
    [ 248.887966] btrfs: disk space caching is enabled
    [ 480.250067] INFO: task rsync:9289 blocked for more than 120 seconds.
    [ 480.250072] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
    [ 480.250075] rsync D ffff88023fc12b00 0 9289 9288 0x00000008
    [ 480.250081] ffff88023290e930 0000000000000082 ffffffff81c14440 ffff88015e4d5fd8
    [ 480.250086] ffff88015e4d5fd8 ffff88015e4d5fd8 0000000000078001 ffff88015e4d5fd8
    [ 480.250090] ffff88021d096800 ffff88021d096ae8 ffff88015e4d5cc8 ffff88015e4d5c70
    [ 480.250094] Call Trace:
    [ 480.250105] [<ffffffff8138d813>] ? btrfs_find_free_ino+0xb3/0x140
    [ 480.250111] [<ffffffff810a9040>] ? wake_up_bit+0x20/0x20
    [ 480.250116] [<ffffffff813a53ec>] ? btrfs_create+0x4c/0x1e0
    [ 480.250122] [<ffffffff81173e21>] ? vfs_create+0x61/0xe0
    [ 480.250126] [<ffffffff81174872>] ? do_last+0x9d2/0xe70
    [ 480.250131] [<ffffffff81174dbd>] ? path_openat+0xad/0x4e0
    [ 480.250137] [<ffffffff81140727>] ? handle_pte_fault+0x87/0x880
    [ 480.250142] [<ffffffff811757c3>] ? do_filp_open+0x33/0x80
    [ 480.250148] [<ffffffff81181777>] ? __alloc_fd+0x97/0x120
    [ 480.250154] [<ffffffff81166b7f>] ? do_sys_open+0xdf/0x1b0
    [ 480.250160] [<ffffffff817bce16>] ? system_call_fastpath+0x1a/0x1f
    [ 600.043537] INFO: task btrfs-transacti:8924 blocked for more than 120 seconds.
    [ 600.043542] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
    [ 600.043545] btrfs-transacti D ffff88023fc92b00 0 8924 2 0x00000008
    [ 600.043551] ffff880219ee4a40 0000000000000046 ffff880236875cd0 ffff88021c053fd8
    [ 600.043555] ffff88021c053fd8 ffff88021c053fd8 0000000000000001 ffff88021c053fd8
    [ 600.043560] ffff880152751e60 ffff88021c053e00 ffff88021b3a2000 ffff8801526a2078
    [ 600.043564] Call Trace:
    [ 600.043575] [<ffffffff817b94c9>] ? schedule_timeout+0x239/0x340
    [ 600.043582] [<ffffffff8137106d>] ? btrfs_put_tree_mod_seq+0x10d/0x150
    [ 600.043588] [<ffffffff813adca4>] ? btrfs_run_ordered_operations+0x214/0x2c0
    [ 600.043593] [<ffffffff81395f71>] ? btrfs_commit_transaction+0x221/0xa70
    [ 600.043599] [<ffffffff810a9040>] ? wake_up_bit+0x20/0x20
    [ 600.043603] [<ffffffff81396850>] ? start_transaction+0x90/0x500
    [ 600.043608] [<ffffffff8138e895>] ? transaction_kthread+0x185/0x220
    [ 600.043613] [<ffffffff8138e710>] ? __setup_root.isra.37+0x310/0x310
    [ 600.043617] [<ffffffff810a841f>] ? kthread+0xaf/0xc0
    [ 600.043621] [<ffffffff810a8370>] ? kthread_create_on_node+0x120/0x120
    [ 600.043626] [<ffffffff817bcd6c>] ? ret_from_fork+0x7c/0xb0
    [ 600.043630] [<ffffffff810a8370>] ? kthread_create_on_node+0x120/0x120
    [ 600.043646] INFO: task rsync:9289 blocked for more than 120 seconds.
    [ 600.043647] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
    [ 600.043649] rsync D ffff88023fc12b00 0 9289 9288 0x00000008
    [ 600.043654] ffff88023290e930 0000000000000082 ffffffff81c14440 ffff88015e4d5fd8
    [ 600.043658] ffff88015e4d5fd8 ffff88015e4d5fd8 0000000000078001 ffff88015e4d5fd8
    [ 600.043662] ffff88021d096800 ffff88021d096ae8 ffff88015e4d5cc8 ffff88015e4d5c70
    [ 600.043666] Call Trace:
    [ 600.043671] [<ffffffff8138d813>] ? btrfs_find_free_ino+0xb3/0x140
    [ 600.043676] [<ffffffff810a9040>] ? wake_up_bit+0x20/0x20
    [ 600.043680] [<ffffffff813a53ec>] ? btrfs_create+0x4c/0x1e0
    [ 600.043686] [<ffffffff81173e21>] ? vfs_create+0x61/0xe0
    [ 600.043691] [<ffffffff81174872>] ? do_last+0x9d2/0xe70
    [ 600.043696] [<ffffffff81174dbd>] ? path_openat+0xad/0x4e0
    [ 600.043702] [<ffffffff81140727>] ? handle_pte_fault+0x87/0x880
    [ 600.043707] [<ffffffff811757c3>] ? do_filp_open+0x33/0x80
    [ 600.043713] [<ffffffff81181777>] ? __alloc_fd+0x97/0x120
    [ 600.043718] [<ffffffff81166b7f>] ? do_sys_open+0xdf/0x1b0
    [ 600.043723] [<ffffffff817bce16>] ? system_call_fastpath+0x1a/0x1f
    [ 719.837149] INFO: task btrfs-transacti:8924 blocked for more than 120 seconds.
    [ 719.837153] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
    [ 719.837156] btrfs-transacti D ffff88023fc92b00 0 8924 2 0x00000008
    [ 719.837162] ffff880219ee4a40 0000000000000046 ffff880236875cd0 ffff88021c053fd8
    [ 719.837167] ffff88021c053fd8 ffff88021c053fd8 0000000000000001 ffff88021c053fd8
    [ 719.837171] ffff880152751e60 ffff88021c053e00 ffff88021b3a2000 ffff8801526a2078
    [ 719.837176] Call Trace:
    [ 719.837187] [<ffffffff817b94c9>] ? schedule_timeout+0x239/0x340
    [ 719.837193] [<ffffffff8137106d>] ? btrfs_put_tree_mod_seq+0x10d/0x150
    [ 719.837199] [<ffffffff813adca4>] ? btrfs_run_ordered_operations+0x214/0x2c0
    [ 719.837205] [<ffffffff81395f71>] ? btrfs_commit_transaction+0x221/0xa70
    [ 719.837211] [<ffffffff810a9040>] ? wake_up_bit+0x20/0x20
    [ 719.837215] [<ffffffff81396850>] ? start_transaction+0x90/0x500
    [ 719.837220] [<ffffffff8138e895>] ? transaction_kthread+0x185/0x220
    [ 719.837225] [<ffffffff8138e710>] ? __setup_root.isra.37+0x310/0x310
    [ 719.837229] [<ffffffff810a841f>] ? kthread+0xaf/0xc0
    [ 719.837233] [<ffffffff810a8370>] ? kthread_create_on_node+0x120/0x120
    [ 719.837238] [<ffffffff817bcd6c>] ? ret_from_fork+0x7c/0xb0
    [ 719.837242] [<ffffffff810a8370>] ? kthread_create_on_node+0x120/0x120
    [ 719.837257] INFO: task rsync:9289 blocked for more than 120 seconds.
    [ 719.837259] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
    [ 719.837261] rsync D ffff88023fc12b00 0 9289 9288 0x00000008
    [ 719.837266] ffff88023290e930 0000000000000082 ffffffff81c14440 ffff88015e4d5fd8
    [ 719.837270] ffff88015e4d5fd8 ffff88015e4d5fd8 0000000000078001 ffff88015e4d5fd8
    [ 719.837274] ffff88021d096800 ffff88021d096ae8 ffff88015e4d5cc8 ffff88015e4d5c70
    [ 719.837278] Call Trace:
    [ 719.837283] [<ffffffff8138d813>] ? btrfs_find_free_ino+0xb3/0x140
    [ 719.837288] [<ffffffff810a9040>] ? wake_up_bit+0x20/0x20
    [ 719.837292] [<ffffffff813a53ec>] ? btrfs_create+0x4c/0x1e0
    [ 719.837298] [<ffffffff81173e21>] ? vfs_create+0x61/0xe0
    [ 719.837303] [<ffffffff81174872>] ? do_last+0x9d2/0xe70
    [ 719.837308] [<ffffffff81174dbd>] ? path_openat+0xad/0x4e0
    [ 719.837314] [<ffffffff81140727>] ? handle_pte_fault+0x87/0x880
    [ 719.837319] [<ffffffff811757c3>] ? do_filp_open+0x33/0x80
    [ 719.837325] [<ffffffff81181777>] ? __alloc_fd+0x97/0x120
    [ 719.837331] [<ffffffff81166b7f>] ? do_sys_open+0xdf/0x1b0
    [ 719.837335] [<ffffffff817bce16>] ? system_call_fastpath+0x1a/0x1f
    [ 839.630657] INFO: task btrfs-transacti:8924 blocked for more than 120 seconds.
    [ 839.630662] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
    [ 839.630665] btrfs-transacti D ffff88023fc92b00 0 8924 2 0x00000008
    [ 839.630671] ffff880219ee4a40 0000000000000046 ffff880236875cd0 ffff88021c053fd8
    [ 839.630676] ffff88021c053fd8 ffff88021c053fd8 0000000000000001 ffff88021c053fd8
    [ 839.630680] ffff880152751e60 ffff88021c053e00 ffff88021b3a2000 ffff8801526a2078
    [ 839.630684] Call Trace:
    [ 839.630695] [<ffffffff817b94c9>] ? schedule_timeout+0x239/0x340
    [ 839.630702] [<ffffffff8137106d>] ? btrfs_put_tree_mod_seq+0x10d/0x150
    [ 839.630708] [<ffffffff813adca4>] ? btrfs_run_ordered_operations+0x214/0x2c0
    [ 839.630713] [<ffffffff81395f71>] ? btrfs_commit_transaction+0x221/0xa70
    [ 839.630719] [<ffffffff810a9040>] ? wake_up_bit+0x20/0x20
    [ 839.630724] [<ffffffff81396850>] ? start_transaction+0x90/0x500
    [ 839.630729] [<ffffffff8138e895>] ? transaction_kthread+0x185/0x220
    [ 839.630733] [<ffffffff8138e710>] ? __setup_root.isra.37+0x310/0x310
    [ 839.630737] [<ffffffff810a841f>] ? kthread+0xaf/0xc0
    [ 839.630741] [<ffffffff810a8370>] ? kthread_create_on_node+0x120/0x120
    [ 839.630747] [<ffffffff817bcd6c>] ? ret_from_fork+0x7c/0xb0
    [ 839.630751] [<ffffffff810a8370>] ? kthread_create_on_node+0x120/0x120
    [ 839.630766] INFO: task rsync:9289 blocked for more than 120 seconds.
    [ 839.630768] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
    [ 839.630770] rsync D ffff88023fc12b00 0 9289 9288 0x00000008
    [ 839.630774] ffff88023290e930 0000000000000082 ffffffff81c14440 ffff88015e4d5fd8
    [ 839.630778] ffff88015e4d5fd8 ffff88015e4d5fd8 0000000000078001 ffff88015e4d5fd8
    [ 839.630783] ffff88021d096800 ffff88021d096ae8 ffff88015e4d5cc8 ffff88015e4d5c70
    [ 839.630787] Call Trace:
    [ 839.630792] [<ffffffff8138d813>] ? btrfs_find_free_ino+0xb3/0x140
    [ 839.630796] [<ffffffff810a9040>] ? wake_up_bit+0x20/0x20
    [ 839.630800] [<ffffffff813a53ec>] ? btrfs_create+0x4c/0x1e0
    [ 839.630807] [<ffffffff81173e21>] ? vfs_create+0x61/0xe0
    [ 839.630811] [<ffffffff81174872>] ? do_last+0x9d2/0xe70
    [ 839.630816] [<ffffffff81174dbd>] ? path_openat+0xad/0x4e0
    [ 839.630822] [<ffffffff81140727>] ? handle_pte_fault+0x87/0x880
    [ 839.630827] [<ffffffff811757c3>] ? do_filp_open+0x33/0x80
    [ 839.630833] [<ffffffff81181777>] ? __alloc_fd+0x97/0x120
    [ 839.630839] [<ffffffff81166b7f>] ? do_sys_open+0xdf/0x1b0
    [ 839.630843] [<ffffffff817bce16>] ? system_call_fastpath+0x1a/0x1f
    [ 959.424100] INFO: task btrfs-transacti:8924 blocked for more than 120 seconds.
    [ 959.424104] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
    [ 959.424107] btrfs-transacti D ffff88023fc92b00 0 8924 2 0x00000008
    [ 959.424113] ffff880219ee4a40 0000000000000046 ffff880236875cd0 ffff88021c053fd8
    [ 959.424118] ffff88021c053fd8 ffff88021c053fd8 0000000000000001 ffff88021c053fd8
    [ 959.424122] ffff880152751e60 ffff88021c053e00 ffff88021b3a2000 ffff8801526a2078
    [ 959.424127] Call Trace:
    [ 959.424138] [<ffffffff817b94c9>] ? schedule_timeout+0x239/0x340
    [ 959.424144] [<ffffffff8137106d>] ? btrfs_put_tree_mod_seq+0x10d/0x150
    [ 959.424150] [<ffffffff813adca4>] ? btrfs_run_ordered_operations+0x214/0x2c0
    [ 959.424155] [<ffffffff81395f71>] ? btrfs_commit_transaction+0x221/0xa70
    [ 959.424161] [<ffffffff810a9040>] ? wake_up_bit+0x20/0x20
    [ 959.424166] [<ffffffff81396850>] ? start_transaction+0x90/0x500
    [ 959.424170] [<ffffffff8138e895>] ? transaction_kthread+0x185/0x220
    [ 959.424175] [<ffffffff8138e710>] ? __setup_root.isra.37+0x310/0x310
    [ 959.424179] [<ffffffff810a841f>] ? kthread+0xaf/0xc0
    [ 959.424183] [<ffffffff810a8370>] ? kthread_create_on_node+0x120/0x120
    [ 959.424188] [<ffffffff817bcd6c>] ? ret_from_fork+0x7c/0xb0
    [ 959.424193] [<ffffffff810a8370>] ? kthread_create_on_node+0x120/0x120
    [ 959.424208] INFO: task rsync:9289 blocked for more than 120 seconds.
    [ 959.424210] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
    [ 959.424212] rsync D ffff88023fc12b00 0 9289 9288 0x00000008
    [ 959.424216] ffff88023290e930 0000000000000082 ffffffff81c14440 ffff88015e4d5fd8
    [ 959.424220] ffff88015e4d5fd8 ffff88015e4d5fd8 0000000000078001 ffff88015e4d5fd8
    [ 959.424225] ffff88021d096800 ffff88021d096ae8 ffff88015e4d5cc8 ffff88015e4d5c70
    [ 959.424229] Call Trace:
    [ 959.424234] [<ffffffff8138d813>] ? btrfs_find_free_ino+0xb3/0x140
    [ 959.424238] [<ffffffff810a9040>] ? wake_up_bit+0x20/0x20
    [ 959.424242] [<ffffffff813a53ec>] ? btrfs_create+0x4c/0x1e0
    [ 959.424249] [<ffffffff81173e21>] ? vfs_create+0x61/0xe0
    [ 959.424253] [<ffffffff81174872>] ? do_last+0x9d2/0xe70
    [ 959.424258] [<ffffffff81174dbd>] ? path_openat+0xad/0x4e0
    [ 959.424264] [<ffffffff81140727>] ? handle_pte_fault+0x87/0x880
    [ 959.424269] [<ffffffff811757c3>] ? do_filp_open+0x33/0x80
    [ 959.424275] [<ffffffff81181777>] ? __alloc_fd+0x97/0x120
    [ 959.424281] [<ffffffff81166b7f>] ? do_sys_open+0xdf/0x1b0
    [ 959.424285] [<ffffffff817bce16>] ? system_call_fastpath+0x1a/0x1f
    [ 1079.217632] INFO: task btrfs-transacti:8924 blocked for more than 120 seconds.
    [ 1079.217637] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
    [ 1079.217640] btrfs-transacti D ffff88023fc92b00 0 8924 2 0x00000008
    [ 1079.217646] ffff880219ee4a40 0000000000000046 ffff880236875cd0 ffff88021c053fd8
    [ 1079.217651] ffff88021c053fd8 ffff88021c053fd8 0000000000000001 ffff88021c053fd8
    [ 1079.217655] ffff880152751e60 ffff88021c053e00 ffff88021b3a2000 ffff8801526a2078
    [ 1079.217659] Call Trace:
    [ 1079.217670] [<ffffffff817b94c9>] ? schedule_timeout+0x239/0x340
    [ 1079.217677] [<ffffffff8137106d>] ? btrfs_put_tree_mod_seq+0x10d/0x150
    [ 1079.217682] [<ffffffff813adca4>] ? btrfs_run_ordered_operations+0x214/0x2c0
    [ 1079.217688] [<ffffffff81395f71>] ? btrfs_commit_transaction+0x221/0xa70
    [ 1079.217694] [<ffffffff810a9040>] ? wake_up_bit+0x20/0x20
    [ 1079.217698] [<ffffffff81396850>] ? start_transaction+0x90/0x500
    [ 1079.217703] [<ffffffff8138e895>] ? transaction_kthread+0x185/0x220
    [ 1079.217707] [<ffffffff8138e710>] ? __setup_root.isra.37+0x310/0x310
    [ 1079.217711] [<ffffffff810a841f>] ? kthread+0xaf/0xc0
    [ 1079.217715] [<ffffffff810a8370>] ? kthread_create_on_node+0x120/0x120
    [ 1079.217721] [<ffffffff817bcd6c>] ? ret_from_fork+0x7c/0xb0
    [ 1079.217725] [<ffffffff810a8370>] ? kthread_create_on_node+0x120/0x120
    rsync simple stops, all disc activity ceases

    this is a 3.8.10 kernel with btrfs-state of 3.9 kernel :/

    and back I'm to ext4, xfs, ZFS, etc.


    it's a shame reiser4 didn't made it into the mainline kernel - it's still way more mature & stable than reiser4

    afaik I never or only once had data loss with it - whereas with btrfs several times already I didn't have access anymore or data corruption of data

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