Well I don´t know exactly but perhaps the reason is because the VM is hosted over LVM-on-iSCSI??? Just a idea...I am really lost here...Trying find a reason to explain all the lost of performance... I took all necessary cares about cables, switches, storage and now a simple backup task takes so long to finish... I am stunned!...
2014-08-27 14:53 GMT-03:00 Iosif Peterfi <iosif.pete...@gmail.com>: > 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.nune...@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.pete...@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.nune...@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.nune...@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.pete...@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.nune...@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.pete...@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.nune...@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 <b...@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-boun...@pve.proxmox.com] *Namens >>>>>>>>>> *Gilberto Nunes >>>>>>>>>> *Verzonden:* woensdag 27 augustus 2014 18:47 >>>>>>>>>> *Aan:* pve-user@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@pve.proxmox.com >>>>>>>>> http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user >>>>>>>>> >>>>>>>>> >>>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> Gilberto Ferreira >>>>>>> >>>>>>> >>>>>> >>>>> >>>>> >>>>> Gilberto Ferreira >>>>> >>>> >>>> >>> >> >> >> Gilberto Ferreira >> >> > Gilberto Ferreira
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