Hi guys,
i have 4 debian squeeze with xen 4 and all them with 4 to 6 HVM
virtual machines. All the VMs are located in a fith machine (A
SuperMicro LSI Controller as storage).
The host servers are Intel i7 with 24GB fo RAM (Debian Squeeze +
Xen4) and the storage a Xen 3.0 with 8GB of RAM (CentOS 5.5 + TGTD) and
thery are all connect with a gigabit network dedicated for the iSCSI.
My problem is, when working at the storage, doing backup procedures
with the command dd and using the bzip2, the IOWait increases a litle
bit, the normal state is close to 0%, but when copying or moving the
files generated by the backup, usually bigger than 2G, the IOWait
increases too much, reaching 100%, in cases in all 4 cores, making the
virtual machines stop responding and even if i stop the procedure, the
virtual machines doesnt comes back, been necessary a reboot or shutdown.
Does anyone knows about this problem ? And there is any
configuration that i could do in the iSCSI-Target and Initiator to
increase de performance? And a configuration in the virtual machines
filesystem to prevent it from stopping?
Thanks you all,
Regards,
Tny M.
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> i have 4 debian squeeze with xen 4 and all them with 4 to 6 HVM virtual > machines. All the VMs are located in a fith machine (A SuperMicro LSI > Controller as storage). > The host servers are Intel i7 with 24GB fo RAM (Debian Squeeze + Xen4) > and the storage a Xen 3.0 with 8GB of RAM (CentOS 5.5 + TGTD) and thery are > all connect with a gigabit network dedicated for the iSCSI. > My problem is, when working at the storage, doing backup procedures with > the command dd and using the bzip2, the IOWait increases a litle bit, the > normal state is close to 0%, but when copying or moving the files generated > by the backup, usually bigger than 2G, the IOWait increases too much, > reaching 100%, in cases in all 4 cores, making the virtual machines stop > responding and even if i stop the procedure, the virtual machines doesnt > comes back, been necessary a reboot or shutdown. > Does anyone knows about this problem ? And there is any configuration > that i could do in the iSCSI-Target and Initiator to increase de performance? > And a configuration in the virtual machines filesystem to prevent it from > stopping?I always use ionice when using dd to do a backup. You should also look into scst-iscsi. The default for most distro''s is the IET iscsi. Cheers, Tom. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Are your virtual machines stored with NFS? _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
No, they are stored with iSCSI. On 09/13/2011 03:57 AM, Antonio Colin wrote:> Are your virtual machines stored with NFS? > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Tue, Sep 13, 2011 at 2:11 AM, Oper.ML <oper.ml@gmail.com> wrote:> ** > Hi guys, > > i have 4 debian squeeze with xen 4 and all them with 4 to 6 HVM virtual > machines. All the VMs are located in a fith machine (A SuperMicro LSI > Controller as storage). > The host servers are Intel i7 with 24GB fo RAM (Debian Squeeze + Xen4) > and the storage a Xen 3.0 with 8GB of RAM (CentOS 5.5 + TGTD) and thery > are all connect with a gigabit network dedicated for the iSCSI. > My problem is, when working at the storage, doing backup procedures > with the command dd and using the bzip2, the IOWait increases a litle bit, > the normal state is close to 0%, but when copying or moving the files > generated by the backup, usually bigger than 2G, the IOWait increases too > much, reaching 100%, in cases in all 4 cores, making the virtual machines > stop responding and even if i stop the procedure, the virtual machines > doesnt comes back, been necessary a reboot or shutdown. > Does anyone knows about this problem ? And there is any configuration > that i could do in the iSCSI-Target and Initiator to increase de > performance? And a configuration in the virtual machines filesystem to > prevent it from stopping? > > Thanks you all, > Regards, > Tny M. > > _______________________________________________ > >What is the specs of your storage server? It sounds like the storage server is underpowered or overloaded quite a lot. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Hi Rudy
the storage serer is a Xeon Quad 2.13GHz (E5506) with 8GB DDR3 of
RAM, a SuperMicro motherboard (X8ST3) and a LSI Logic SAS Controller
(MegaRAID SAS 1078), it also has 16 hard disks in RAID50 and now is
sharing with iSCSI 44 LVM partitions under the CentOS 5.5 S.O.
Most of the time, the system shows 100% idle for all cores, the
load avarage is 0.09 0.04 0.00 and used 1.3GB of RAM with 772MB buffer,
160MB cache.
Regards,
Tony M.
On 09/14/2011 04:04 AM, Rudi Ahlers wrote:>
>
> On Tue, Sep 13, 2011 at 2:11 AM, Oper.ML <oper.ml@gmail.com
> <mailto:oper.ml@gmail.com>> wrote:
>
> Hi guys,
>
> i have 4 debian squeeze with xen 4 and all them with 4 to 6
> HVM virtual machines. All the VMs are located in a fith machine (A
> SuperMicro LSI Controller as storage).
> The host servers are Intel i7 with 24GB fo RAM (Debian Squeeze
> + Xen4) and the storage a Xen 3.0 with 8GB of RAM (CentOS 5.5 +
> TGTD) and thery are all connect with a gigabit network dedicated
> for the iSCSI.
> My problem is, when working at the storage, doing backup
> procedures with the command dd and using the bzip2, the IOWait
> increases a litle bit, the normal state is close to 0%, but when
> copying or moving the files generated by the backup, usually
> bigger than 2G, the IOWait increases too much, reaching 100%, in
> cases in all 4 cores, making the virtual machines stop responding
> and even if i stop the procedure, the virtual machines doesnt
> comes back, been necessary a reboot or shutdown.
> Does anyone knows about this problem ? And there is any
> configuration that i could do in the iSCSI-Target and Initiator to
> increase de performance? And a configuration in the virtual
> machines filesystem to prevent it from stopping?
>
> Thanks you all,
> Regards,
> Tny M.
>
> _______________________________________________
>
>
>
> What is the specs of your storage server?
>
> It sounds like the storage server is underpowered or overloaded quite
> a lot.
>
>
> --
> Kind Regards
> Rudi Ahlers
> SoftDux
>
> Website: http://www.SoftDux.com
> Technical Blog: http://Blog.SoftDux.com
> Office: 087 805 9573
> Cell: 082 554 7532
>
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
_______________________________________________
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Hi Tony I had this same problem a one year ago. My host have one processor Icore7 and motherboard Asus , I don´t remember the name. I did same process like you , backup using DD before I make a copy img for other machine using cp for external volume NFS. The host any time freeze . I belive the problem is raid controller of motheboard because my stuff team change SO this host for Windows 2008 still problem . Windows Server 2008 and Linux aren´t compatible with this motherboard. Til today I don´t found any motheboard for Icore7 100% compatible for Linux so for use XEN production enviroment I use IBM XEON or processor XEON with motherboard INTEL for server, never motheboard Desktop . On Wed, Sep 14, 2011 at 2:59 PM, Oper.ML <oper.ml@gmail.com> wrote:> ** > Hi Rudy > > > the storage serer is a Xeon Quad 2.13GHz (E5506) with 8GB DDR3 of RAM, > a SuperMicro motherboard (X8ST3) and a LSI Logic SAS Controller (MegaRAID > SAS 1078), it also has 16 hard disks in RAID50 and now is sharing with iSCSI > 44 LVM partitions under the CentOS 5.5 S.O. > Most of the time, the system shows 100% idle for all cores, the load > avarage is 0.09 0.04 0.00 and used 1.3GB of RAM with 772MB buffer, 160MB > cache. > > Regards, > Tony M. > > > > On 09/14/2011 04:04 AM, Rudi Ahlers wrote: > > > > On Tue, Sep 13, 2011 at 2:11 AM, Oper.ML <oper.ml@gmail.com> wrote: > >> Hi guys, >> >> i have 4 debian squeeze with xen 4 and all them with 4 to 6 HVM >> virtual machines. All the VMs are located in a fith machine (A SuperMicro >> LSI Controller as storage). >> The host servers are Intel i7 with 24GB fo RAM (Debian Squeeze + Xen4) >> and the storage a Xen 3.0 with 8GB of RAM (CentOS 5.5 + TGTD) and thery >> are all connect with a gigabit network dedicated for the iSCSI. >> My problem is, when working at the storage, doing backup procedures >> with the command dd and using the bzip2, the IOWait increases a litle bit, >> the normal state is close to 0%, but when copying or moving the files >> generated by the backup, usually bigger than 2G, the IOWait increases too >> much, reaching 100%, in cases in all 4 cores, making the virtual machines >> stop responding and even if i stop the procedure, the virtual machines >> doesnt comes back, been necessary a reboot or shutdown. >> Does anyone knows about this problem ? And there is any configuration >> that i could do in the iSCSI-Target and Initiator to increase de >> performance? And a configuration in the virtual machines filesystem to >> prevent it from stopping? >> >> Thanks you all, >> Regards, >> Tny M. >> >> _______________________________________________ >> >> > > What is the specs of your storage server? > > It sounds like the storage server is underpowered or overloaded quite a > lot. > > > -- > Kind Regards > Rudi Ahlers > SoftDux > > Website: http://www.SoftDux.com > Technical Blog: http://Blog.SoftDux.com > Office: 087 805 9573 > Cell: 082 554 7532 > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.comhttp://lists.xensource.com/xen-users > > -- > Você recebeu esta mensagem porque está inscrito em Grupo "xen-br" do Grupos > Google. > Para enviar mensagens para este grupo, envie um email para > xen-br@googlegroups.com > Para anular a inscrição neste grupo, envie um email para > xen-br-unsubscribe@googlegroups.com > Para mais opções, visite este grupo em > http://groups.google.com/group/xen-br?hl=pt-BR > Site do GU Xen-BR: http://www.xen-br.org > Antes de enviar sua primeira mensagem leia atentamente as regras para > participação no site > http://groups.google.com/group/xen-br/web/regras?hl=pt-BR >-- *Bruno Steven - Administrador de sistemas* *LPIC-2 / MCSA-Windows 2003 / CompTIA Security+ * _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users