[PVE-User] VM issue when Backup over NAS,

Muhammad Yousuf Khan sirtcp at gmail.com
Wed Jun 15 18:07:52 CEST 2011


ok Thanks Martin it is resolved. initially IOdelay shoots to 60 precent but
gradually it decreases and in a mint or two it reaches 20%  and things got
fine. Thank anyways. can you please tell me one more thing what is this IO
delay . it is a IO of HD ,Processor or LAN card or mixture of all together ?

Thanks

Myk



On Wed, Jun 15, 2011 at 3:03 PM, Muhammad Yousuf Khan <sirtcp at gmail.com>wrote:

> ok ill do that an will let you know the update.
>
>
>
> On Wed, Jun 15, 2011 at 1:09 PM, Martin Maurer <martin at proxmox.com> wrote:
>
>>  Based on your hardware the performance is as low as expected. You can
>> limit the speed of vzdump.
>>
>>
>>
>> Create the /etc/vzdump.conf file with the following content:
>>
>>
>>
>> bwlimit: 5000
>>
>>
>>
>> for details, see ‘man vzdump’
>>
>>
>>
>> Martin
>>
>>
>>
>> *From:* Muhammad Yousuf Khan [mailto:sirtcp at gmail.com]
>> *Sent:* Dienstag, 14. Juni 2011 17:31
>>
>> *To:* Martin Maurer
>> *Cc:* pve-user at pve.proxmox.com
>> *Subject:* Re: [PVE-User] VM issue when Backup over NAS,
>>
>>
>>
>> Just FYI
>>
>> the IOdelay problem is only with the machine that i terminated the
>> vzdump(backup job) during the test backup. other seems to b working fine.
>>
>>
>>
>> Tthanks
>>
>>
>>
>>
>>
>>
>>
>> On Tue, Jun 14, 2011 at 8:21 PM, Muhammad Yousuf Khan <sirtcp at gmail.com>
>> wrote:
>>
>>
>>
>> Proxmox
>>
>> Openfiler
>>
>> Processors
>>
>> 2.66 Quad Core
>>
>> P4 3.0 Server board
>>
>> LAN
>>
>> 8GB
>>
>> 4GB
>>
>> HD
>>
>> 1TB
>>
>> 250 GB
>>
>> RAID
>>
>> No
>>
>> No
>>
>> RAM
>>
>> 1GB
>>
>> 1GB
>>
>>
>>
>>
>>
>> On Tue, Jun 14, 2011 at 7:56 PM, Martin Maurer <martin at proxmox.com>
>> wrote:
>>
>> Pls provide all information about your boxes like requested below.
>>
>> Martin
>>
>>
>>
>> *From:* Muhammad Yousuf Khan [mailto:sirtcp at gmail.com]
>> *Sent:* Dienstag, 14. Juni 2011 16:25
>> *To:* Martin Maurer
>> *Cc:* pve-user at pve.proxmox.com
>> *Subject:* Re: [PVE-User] VM issue when Backup over NAS,
>>
>>
>>
>> here you go
>>
>>
>>
>> CPU BOGOMIPS:      21332.18
>>
>> REGEX/SECOND:      521349
>>
>> HD SIZE:           94.49 GB (/dev/mapper/pve-root)
>>
>> BUFFERED READS:    25.19 MB/sec
>>
>> AVERAGE SEEK TIME: 32.31 ms
>>
>> FSYNCS/SECOND:     3.24
>>
>> DNS EXT:           303.86 ms
>>
>> DNS INT:           320.81 ms (com)
>>
>>
>>
>> please tell me what is the ideal approach for controlling the IO delay ,
>> ISCSI or local Storage.
>>
>> right now IO delay is b/w 35 to 50 percent. how can i see the per VM IO so
>> i can manually check what is going on inside rather checking every single VM
>> one by one
>>
>>
>>
>>
>>
>> On Tue, Jun 14, 2011 at 6:30 PM, Martin Maurer <martin at proxmox.com>
>> wrote:
>>
>> Looks like your storage/network is overloaded. Try reducing the vzdump
>> bandwith (see ‘man vzdump’).
>>
>>
>>
>> Also post the output of ‘pveperf’ from your Proxmox VE host and give
>> details about the used storage/raid hardware (Proxmox VE host and
>> Openfiler).
>>
>>
>>
>> Martin
>>
>>
>>
>> *From:* pve-user-bounces at pve.proxmox.com [mailto:
>> pve-user-bounces at pve.proxmox.com] *On Behalf Of *Muhammad Yousuf Khan
>> *Sent:* Dienstag, 14. Juni 2011 13:49
>> *To:* pve-user at pve.proxmox.com
>> *Subject:* [PVE-User] VM issue when Backup over NAS,
>>
>>
>>
>> Openfiler : 2.99
>>
>> NAS LAN : 1GB (through put is 25% i don't know why, at least acceptable)
>>
>> RAM :4gb
>>
>>
>>
>> Proxmox : 1.8
>>
>> Quadcore : 2.66
>>
>> Ram : 8GB
>>
>> Proxmox LAN : 1G
>>
>>
>>
>> I am using Openfiler as a NAS box. and using NFS and ISCSI both as a
>> storage medium. but i have noticed one thing when i backup a VM on NFS and
>> also copy a huge file inside Running VM which is hosted on ISCSI on same
>> openfiler box. My VM get stuck. i can move the copy window in running VM but
>> can not close task bar or copy window. until the backup task of a VM gets
>> finishes then copy inside VM continue and VM gets usable.
>>
>>
>>
>> how can i over come that issue. for instance if i run backup backup of my
>> data which is inside VM it will again HANG and thing may unavailable to
>> users during backup which is not an option
>>
>> any help?
>>
>>
>>
>>
>>
>> Thanks you
>>
>> MYK
>>
>>
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>>
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>
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