| Re: Heavy Disk IO from a single VM can block the other VMs on the same host [message #44340 is a reply to message #44339] |
Thu, 01 December 2011 15:49   |
Bogdan-Stefan Rotariu
Messages: 4
Registered: May 2008
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Junior Member |
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On Nov 29, 2011, at 18:13, Hubert Krause <hubert.krause@inform-software.com> (by way of HubertKrause <hubert.krause@inform-software.com>) (by way of HubertKrause <hubert.krause@inform-software.com>) wrote:
> Hello,
>
> my environment is a Debian squeeze host with a few debian squeeze
> guests. The private and root filesystems of the guest are locatet on
> the same raid device (raid5)
maybe offtopic, maybe not, but stop using raid5 for VM deployment, use raid10, raid1, raid0 -- with lvm and snapshots
raid5 will always be slow on io, as it has checksums because "recalculation and redistribution of parity data on a per-write basis"
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