[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-users] XEN infrastructure setup question
I just want to note that snapshots in LVM are reverse-differential, so every write operation will write to every snapshot (5 snapshots, 6 write operations instead one). In product environment under high load this can cause a huge impact on IO performance. Ð ÐÑÐ, 03/08/2011 Ð 17:49 +0200, Christian Motschke ÐÐÑÐÑ: > Am 03.08.2011 um 17:01 schrieb Javier Guerra Giraldez: > > > On Sat, Jul 30, 2011 at 1:39 AM, Abilash Praveen [Consign IT Private > > Limited] <abilash@xxxxxxxxxxxxxx> wrote: > >> 1) How many VMs can I run? > > > > unanswerable, as it totally depends on your needs. the box is on the > > smallish side, however. > > > >> 2) How do I go about LVM and also use RAID 1? > > > > do a RAID, then set it as a PV, create a VG, then split on your LVs > > Or put 2 PVs in 1 VG and create the LVs as mirror (lvcreate -m 1 â) > > > > >> 3) How do I backup VMs (snapshots?) > > > > install backup clients on the VMs > > Or you can make a snapshot, check the filesystem of the snapshot, mount the > snapshot and use a backup tool or dd the snapshot to another disk. You can > find backup scripts for this. > http://www.cduce.org/~abate/files/xenBackup.txt > > > > >> 4) I am also looking at Eucalyptus for future offering. My understanding is > >> that with Eucalyptus, I can group different bare metals into a single cloud > >> - i.e, 2 x quad core process, 2 x 8 GB RAM will now become a 2 quad core > >> with 16 GB RAM cloud and the VMs can be installed into this cloud. Please > >> correct me if I'm wrong. > > > > 'cloud' isn't a magic word. Eucalyptus just simplifies management and > > resource allocation. Each VM still reside on a single box, but if > > done correctly you don't have to care exactly which. > > > > -- > > Javier > > > > _______________________________________________ > > Xen-users mailing list > > Xen-users@xxxxxxxxxxxxxxxxxxx > > http://lists.xensource.com/xen-users > > > _______________________________________________ > Xen-users mailing list > Xen-users@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-users _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
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