On 06/20/2011 05:51 PM, Henning Rohlfs wrote:
Hello, I've migrated my system to btrfs (raid1) a few months ago. Since then the performance has been pretty bad, but recently it's gotten unbearable: a simple sync called while the system is idle can take 20 up to 60 seconds. Creating or deleting files often has several seconds latency, too. One curious - but maybe unrelated - observation is that even though I'm using a raid1 btrfs setup, the hdds are often being written to sequentially. One hard-drive sees some write activity and after it subsides, the other drive sees some activity. (See attached sequential-writes.txt.)
Can you do sysrq+w while this is happening so we can see who is doing the writing? Thanks,
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