system IO load is high while copying huge amounts of data to USB disk.
Issue
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system load is high while copying huge amounts of data to USB disk.
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We have found out that our system became IO bound due to copying 43GB of data from a SAN block device with "dd" to a mounted USB disk.
My question is: how can we safely copy this amount of data without other processes being stalled? Are there any kernel parameters to influence the process priority? Is there any solution?.
Environment
- Red Hat Enterprise Linux 5
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