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Q: 

Can I set noatime for my XEN guest OS partition? Will it work?

I have a VPS in cloud environment based on XEN Virtualization platform.

/etc/fstab looks like that:

LABEL=PRGMRDISK1   /    ext3    errors=remount-ro       0       0

As far as I know IO can pretty easily become a bottleneck if some other VPS neighbor will use it intensively(IO bandwidth is a shared resource for multiple guest VPS).

Can I add noatime,nodiratime to /etc/fstab partition declaration to save some IO load? Will it work?

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