[PVE-User] backup takes so long to finish

[Iosif Peterfi]

Probably there is the bottleneck. 1Gbit = 100MB/s. Probably your SAS might
be faster than considering it uses SATA II 300 MB/s or SATA III 600 MB/s.



On Wed, Aug 27, 2014 at 7:35 PM, Gilberto Nunes <gilberto.nunes32 at gmail.com>
wrote:

> >> 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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