How to increase the read ahead support on devices, lvm volumes ?
Issue
- How to increase the read ahead support on devices for a SAS server. Are there any best practice ?
- Can we set the read ahead value at lvm level, on the block device or on all?
- What is the default read ahead value globally?
Environment
- Red Hat Enterprise Linux(RHEL) 6
- Red Hat Enterprise Linux(RHEL) 5
- LVM volume.
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