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Re: [Xen-users] performace of disks
| To: | "Fernando Jiménez Solano" <fernandojs@xxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-users] performace of disks |
| From: | "Victor Hugo dos Santos" <listas.vhs@xxxxxxxxx> |
| Date: | Thu, 24 Jul 2008 15:24:14 -0400 |
| Cc: | xen-users@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Thu, 24 Jul 2008 12:24:48 -0700 |
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| Sender: | xen-users-bounces@xxxxxxxxxxxxxxxxxxx |
On Thu, Jul 24, 2008 at 3:20 PM, Fernando Jiménez Solano <fernandojs@xxxxxxxxxxxxxx> wrote: > On Thu, 24 Jul 2008 20:49:49 +0200, Victor Hugo dos Santos > <listas.vhs@xxxxxxxxx> wrote: > >> On Thu, Jul 24, 2008 at 1:39 PM, Fernando Jiménez Solano >> <fernandojs@xxxxxxxxxxxxxx> wrote: >>> >>> On Thu, 24 Jul 2008 19:07:18 +0200, Victor Hugo dos Santos >>> <listas.vhs@xxxxxxxxx> wrote: >> >> [...] >> >>>> 1 - what is the best RAID (0,1,5,10,50) for server running very, very >>>> VM instances ??? >>>> 2 - and config of stripes/element sizes (32, 64, 128, 256, etc, KB) ?? >>> >>> I guess it depends more on the kind of disk activity of the VMs rather >>> than >>> the number of VMs. Database server? Desktop? Media streamer? >> >> mmmm.. mmmm.. and mmmm >> but.. all virtual disks aren't one big image for Dom0 ??? >> in other words, this type of data in the virtual disks is relevant ?? > > > It's not the file or data itself but how the data is accessed. Large stripes > tend to perform better on large files because large files are usually read > in > a sequential, non latency-critical manner. This isn't true for images, > they're > accessed just like the underlying filesystem is (with some overhead). That > is, > rather randomly. ok.. ok.. ok.. is very, very clear now. thanks. -- -- Victor Hugo dos Santos Linux Counter #224399 _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users |
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