http://bugzilla.opensuse.org/show_bug.cgi?id=1198972
http://bugzilla.opensuse.org/show_bug.cgi?id=1198972#c4
Ian Christian changed:
What |Removed |Added
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CC| |ian.christian@zoopla.co.uk
--- Comment #4 from Ian Christian ---
Further to this, it can be reduced down to just the send, taking out of scope
the SSH connection.
Again it's observed that the first chunk of data moves quickly - 34s in and
806M has been written:
806MiB 0:00:34 [93.9KiB/s]
However, then things then slow down significantly, while there are occasional
bursts of speed, generally speaking the speed can be sene in 100-200KiB/s
After 4 minutes, only 200MiB of extra data has been written:
989MiB 0:04:04 [ 144KiB/s]
Here's the details on the devices:
root@dbshard1a.prod:~ # btrfs device stats /sqldata/
[/dev/nvme0n1].write_io_errs 0
[/dev/nvme0n1].read_io_errs 0
[/dev/nvme0n1].flush_io_errs 0
[/dev/nvme0n1].corruption_errs 0
[/dev/nvme0n1].generation_errs 0
[/dev/nvme1n1].write_io_errs 0
[/dev/nvme1n1].read_io_errs 0
[/dev/nvme1n1].flush_io_errs 0
[/dev/nvme1n1].corruption_errs 0
[/dev/nvme1n1].generation_errs 0
[/dev/nvme2n1].write_io_errs 0
[/dev/nvme2n1].read_io_errs 0
[/dev/nvme2n1].flush_io_errs 0
[/dev/nvme2n1].corruption_errs 0
[/dev/nvme2n1].generation_errs 0
[/dev/nvme3n1].write_io_errs 0
[/dev/nvme3n1].read_io_errs 0
[/dev/nvme3n1].flush_io_errs 0
[/dev/nvme3n1].corruption_errs 0
[/dev/nvme3n1].generation_errs 0
root@dbshard1a.prod:~ # btrfs device usage /sqldata/
/dev/nvme0n1, ID: 1
Device size: 3.49TiB
Device slack: 0.00B
Data,RAID10: 751.00GiB
Metadata,RAID10: 187.00GiB
System,RAID10: 32.00MiB
Unallocated: 2.58TiB
/dev/nvme1n1, ID: 2
Device size: 3.49TiB
Device slack: 0.00B
Data,RAID10: 751.00GiB
Metadata,RAID10: 187.00GiB
System,RAID10: 32.00MiB
Unallocated: 2.58TiB
/dev/nvme2n1, ID: 3
Device size: 3.49TiB
Device slack: 0.00B
Data,RAID10: 751.00GiB
Metadata,RAID10: 187.00GiB
System,RAID10: 32.00MiB
Unallocated: 2.58TiB
/dev/nvme3n1, ID: 4
Device size: 3.49TiB
Device slack: 0.00B
Data,RAID10: 751.00GiB
Metadata,RAID10: 187.00GiB
System,RAID10: 32.00MiB
Unallocated: 2.58TiB
Any suggestions on how to diagnose this speed issue would be much appreciated!
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