[PVE-User] backup takes so long to finish

[Gilberto Nunes]

>> Is the storage over iSCSI ?

Yes! Standard iSCSI. I not enable trunk yet, I meant, bonding... You know...

>> Is the storage via 1GB link ?

Yes... Switch gigaethernet, CAT6 and all NIC are gigaethernet as well...




2014-08-27 14:33 GMT-03:00 Iosif Peterfi <iosif.peterfi at gmail.com>:

> Is the storage over iSCSI ? Is the storage via 1GB link ?
>
>
> On Wed, Aug 27, 2014 at 7:29 PM, Gilberto Nunes <
> gilberto.nunes32 at gmail.com> wrote:
>
>> Just for compare, the very same backup from same VM takes 50 minutes, on
>> previously scenario, I meant, run in a single IBM M4 server with SAS
>> disks...
>> Now, in the Storage and an IBM x3250 M4 server, with 128GB of memory,
>> takes 6 hours!
>> I can't understand why! So weird!
>>
>>
>>
>> 2014-08-27 14:21 GMT-03:00 Gilberto Nunes <gilberto.nunes32 at gmail.com>:
>>
>>> Well... This not justify all this low performance, since the VM
>>> previously ran on another IBM machine with single SAS and backup task ran
>>> nicely.
>>> Since the VM now running in high level enterprise Storage, I expected
>>> more performance, if I am not wrong with that...
>>>
>>>
>>> 2014-08-27 14:13 GMT-03:00 Iosif Peterfi <iosif.peterfi at gmail.com>:
>>>
>>> Maybe you will have better performance if you split them. So keep the
>>>> busiest database on IBM storage and put the others on USB. This way you
>>>> share the I/O load.
>>>>
>>>> Regards,
>>>> Iosif
>>>>
>>>>
>>>> On Wed, Aug 27, 2014 at 7:09 PM, Gilberto Nunes <
>>>> gilberto.nunes32 at gmail.com> wrote:
>>>>
>>>>> Unfortunately, I do not have such luxury by now... SSD is out of the
>>>>> question, for a moment...
>>>>> But I changed from USB device to SAS device, in hope to improve the
>>>>> I/O performance...  But no success...
>>>>> The VM itself, is running is SAS as well, since it hosted in an IBM
>>>>> Storage...
>>>>>
>>>>> I'm still search the cause of issue...
>>>>>
>>>>> Thank you BTW...
>>>>>
>>>>>
>>>>> 2014-08-27 14:04 GMT-03:00 Iosif Peterfi <iosif.peterfi at gmail.com>:
>>>>>
>>>>> Mitigate the I/O bottleneck by assigning different hard drives, even
>>>>>> consider using enterprise grade ssd.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Wed, Aug 27, 2014 at 6:55 PM, Gilberto Nunes <
>>>>>> gilberto.nunes32 at gmail.com> wrote:
>>>>>>
>>>>>>> Hum... At first moment, I thought I/O could being a trouble, since I
>>>>>>> was ran backup in USB devices.
>>>>>>> But now, I ran backup task on SAS disk! So performance and I/O is
>>>>>>> not an issue here...
>>>>>>> And, I can't shrink the file, because the entire disk is being used
>>>>>>> to all databases as I described before...
>>>>>>>
>>>>>>> If somebody else has any other advice, I will appreciate...
>>>>>>>  Thank you
>>>>>>>
>>>>>>>
>>>>>>> 2014-08-27 13:47 GMT-03:00 Bart Lageweg | Bizway <bart at bizway.nl>:
>>>>>>>
>>>>>>>   High I/O when you backup ?
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> Try https://pve.proxmox.com/wiki/Shrink_Qcow2_Disk_Files (when you
>>>>>>>> have a good backup!)
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> *Van:* pve-user [mailto:pve-user-bounces at pve.proxmox.com] *Namens *Gilberto
>>>>>>>> Nunes
>>>>>>>> *Verzonden:* woensdag 27 augustus 2014 18:47
>>>>>>>> *Aan:* pve-user at pve.proxmox.com
>>>>>>>> *Onderwerp:* [PVE-User] backup takes so long to finish
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> Hello
>>>>>>>>
>>>>>>>> I have a VM with Windows 2012 running nicely in PVE 3.2.
>>>>>>>>
>>>>>>>> This VM has a 300 GB disk size that was re-partition with 5 or 6
>>>>>>>> different parts, in order to allocate different databases...
>>>>>>>>
>>>>>>>> The issue is that the backup task takes 6 hours to generate a lzo
>>>>>>>> file with 13 GB size!
>>>>>>>>
>>>>>>>> However, I have another VM, which is Windows 2008 with disk 120 GB
>>>>>>>> size.
>>>>>>>>
>>>>>>>> The backup makes 74 GB file of size, and takes approximately 30
>>>>>>>> minutes!!!
>>>>>>>>
>>>>>>>> I can't see why the first task took so long time to finish!!!
>>>>>>>>
>>>>>>>> Can anybody assist me??
>>>>>>>>
>>>>>>>> Thanks
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> Gilberto Ferreira
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Gilberto Ferreira
>>>>>>>
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> pve-user mailing list
>>>>>>> pve-user at pve.proxmox.com
>>>>>>> http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user
>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> Gilberto Ferreira
>>>>>
>>>>>
>>>>
>>>
>>>
>>> Gilberto Ferreira
>>>
>>
>>
>


Gilberto Ferreira
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