Bumping this thread as the last update from Veritas did not reflect in OVirt Devel list.
Best, Pavan. On Wed, Oct 17, 2018 at 10:03 AM Mahesh Falmari <[email protected]> wrote: > Thanks for the prompt response on these queries. We have few follow-up > queries mentioned inline. > > > > Thanks & Regards, > Mahesh Falmari > > > > *From:* Yaniv Lavi <[email protected]> > *Sent:* Tuesday, October 16, 2018 7:19 PM > *To:* Mahesh Falmari <[email protected]> > *Cc:* Nir Soffer <[email protected]>; Erez, Daniel <[email protected]>; > Tal Nisan <[email protected]>; Pavan Chavva <[email protected]>; devel < > [email protected]>; James Olson <[email protected]>; Navin Tah < > [email protected]>; Sudhakar Paulzagade < > [email protected]>; Abhay Marode <[email protected]>; > Suchitra Herwadkar <[email protected]>; Nirmalya Sirkar < > [email protected]>; Abhijeet Barve <[email protected]> > *Subject:* [EXTERNAL] Re: List of Queries related to RHV > > > > > *YANIV LAVI* > > SENIOR TECHNICAL PRODUCT MANAGER > > Red Hat Israel Ltd. <https://www.redhat.com/> > > 34 Jerusalem Road, Building A, 1st floor > > Ra'anana, Israel 4350109 > > [email protected] T: +972-9-7692306/8272306 F: +972-9-7692223 > IM: ylavi > > <https://red.ht/sig> > > *TRIED. TESTED. TRUSTED.* <https://redhat.com/trusted> > > @redhatnews <https://twitter.com/redhatnews> Red Hat > <https://www.linkedin.com/company/red-hat> Red Hat > <https://www.facebook.com/RedHatInc> > > > > On Tue, Oct 16, 2018 at 4:35 PM Mahesh Falmari <[email protected]> > wrote: > > Hi Nir, > > We have few queries with respect to RHV which we would like to understand > from you. > > > > *1. Does RHV maintains the virtual machine configuration file in back end?* > > Just like we have configuration files for other hypervisors like for > VMware it is .vmx and for Hyper-V, it is .vmcx which captures most of the > virtual machine configuration information in that. On the similar lines, > does RHV also maintains such file? If not, what is the other way to get all > the virtual machine configuration information from a single API? > > > > There is a OVF storage, but this is not meant for consumption. > > Please follow the first section in: > > *https://ovirt.org/develop/release-management/features/storage/backup-restore-disk-snapshots/ > <https://ovirt.org/develop/release-management/features/storage/backup-restore-disk-snapshots/>* > > This explains how to use the API to get a OVF for a VM. > > > > > > *2. Is VM UUID the only way to uniquely identify virtual machine in the > RHV infrastructure?* > > What we understand is that VM UUID is the way to identify virtual machine > uniquely in the RHV infrastructure. Would like to know any other way than > this? > > > > UUID is the way to do this. > > > > > > *3. Do we have any version associated with the virtual machine?* > > Just like we have hardware version in case of VMware and virtual machine > version in case of Hyper-V, does RHV also associate any such version with > virtual machine? > > > > The HW version is based on the VM machine type. > > [Mahesh] Can you please elaborate more on this? How simply VM machine > type going to determine it’s version? > > > > *4. Is it possible to create virtual machines with QCOW2 as base disks > instead of RAW?* > > We would like to understand if there are any use cases customers prefer > creating virtual machines from QCOW2 as base disks instead of RAW ones. > > > > That is a possibility in cases of thin disk on file storage. > > [Mahesh] Can you please elaborate more on this? > > > > *5. RHV Deployment* > > What kind of deployments you have come across in the field? Does customers > scale their infrastructure by adding more datacenters/clusters/nodes or > they add more RHV managers? What scenarios trigger having more than one RHV > manager? > > > > We are all kind with oVirt. I depends on the use case. > > > > > > *6. Image transfer* > > We are trying to download disk chunks using multiple threads to improve > performance of reading data from RHV. Downloading 2 disk chunks > simultaneously via threads should take approximately the same time. But > from our observations this takes roughly 1.5 times. > Can RHVM server requests in parallel, if so are there any settings that > need to be tweaked? > > Here is an example: > Request 1 for chunk 1 from thread 1, Range: bytes=0-1023 > Request 2 for chunk 2 from thread 2, Range: bytes=1024-2047 > Takes roughly 1.5 seconds, whereas a single request would take 1 second. > Expecting it to take just around 1 second. > > [Mahesh] Seeking response to this query. > > *7. Free and Thaw operation* > > For cinder based VM, API recommended for FS consistent backup. > > - POST /api/vms/<ID>/freezefilesystems > - POST /api/vms/<ID>/thawfilesystems > > Why do we need this whereas it is not required for other storage? > > Creating a snapshot does this for you in a case where you have the oVirt > guest agent install on the guest. > > [Mahesh] Thanks, we would also like to understand is there a way to > control crash/app consistent snapshots through REST APIs? > > > > Thanks & Regards, > Mahesh Falmari > > > > -- PAVAN KUMAR CHAVVA ENGINEERING PARTNER MANAGER Red Hat [email protected] M: 4793219099 IM: pchavva
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