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Re: [Xen-users] ssd cache

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  • From: Wouter de Geus <benv-xensource.com@xxxxxxxxxxxxx>
  • Date: Tue, 8 Jul 2014 10:24:34 +0200
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* jacek burghardt <jaceksburghardt@xxxxxxxxx> [2014-07-07 16:00:58 -0600]:

> Is anyone using ssd drive as xen cache? Having bcache will tat benefit xen
> when it comes to vm hard drives ?

I'm using a ssd drive with EnhanceIO in writeback mode on the mdraid device 
underneath LVM.
Speeds up writes a lot for all LVM volumes on that raid device that the domU's 

The nice thing of enhanceio is that you can apply it to just a generic block 
I also looked at bcache but iirc you need to reformat your disk for that to 
work, which simply isn't an option for me on that machine.


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