Hi All,
short question :)
How many STreams used during vsa restore of an single vm.
For Example we had 1 Vm with 1 5TB .vmdk file . Is commvault using 1 STream per VM ?
Another point is what happend when we have the following setup:
1 VM with 5 X 1TB .vmdks is the backup and restore using 5 Streams
in both cases we had an subclient which only this particular vm
Best answer by Jos Meijer
https://documentation.commvault.com/2022e/expert/10969_streams_overview.html
Quote:
“Using Multiple Streams to Restore Data
By default, restore operation uses a single stream. For faster restore operations, you can configure the restore operation to use multiple streams, and you can define alternate data paths. For more information, see GridStor® (Alternate Data Paths) - Overview.
Restoring data using multiple streams is supported by the following agents:
Windows File System Agent
Linux File System Agent
AIX File System Agent
FreeBSD File System Agent
HP-UX File System Agent
Solaris File System Agent”
+17Restore is 1 stream per VM, only backup has multi stream
hey jos thanks for your fast reply. Thats sounds bad… also with index v2 ?
Do you have an idear what is with big vms ?
+23hey jos thanks for your fast reply. Thats sounds bad… also with index v2 ?
Do you have an idear what is with big vms ?
All restores for VMware are still single stream. I know multi-stream has been explored (one stream per disk) but I think there were some challenges with it which meant it could not be used in production.
I’ll try find out more info.
In the meantime, there are some quick recovery options depending on your use case and underlying storage - i.e vSAN, VVOL or NetApp NFS can do ‘instant’ reverts. Live Sync is another option to keep an in-sync replica to recovery quickly from. Live VM recovery is also an option depending on the I/O of the machine.
Restore is 1 stream per VM, only backup has multi stream
do you know if there is an hint to this information in bol
+17https://documentation.commvault.com/2022e/expert/10969_streams_overview.html
Quote:
“Using Multiple Streams to Restore Data
By default, restore operation uses a single stream. For faster restore operations, you can configure the restore operation to use multiple streams, and you can define alternate data paths. For more information, see GridStor® (Alternate Data Paths) - Overview.
Restoring data using multiple streams is supported by the following agents:
Windows File System Agent
Linux File System Agent
AIX File System Agent
FreeBSD File System Agent
HP-UX File System Agent
Solaris File System Agent”
hey jos thanks for your fast reply. Thats sounds bad… also with index v2 ?
Do you have an idear what is with big vms ?
All restores for VMware are still single stream. I know multi-stream has been explored (one stream per disk) but I think there were some challenges with it which meant it could not be used in production.
I’ll try find out more info.
In the meantime, there are some quick recovery options depending on your use case and underlying storage - i.e vSAN, VVOL or NetApp NFS can do ‘instant’ reverts. Live Sync is another option to keep an in-sync replica to recovery quickly from. Live VM recovery is also an option depending on the I/O of the machine.
Hi Andre, did you had time to check the status of Restore with more than 1 Stream for VMWare. ? Thanks
One stream per vmdk feature is enabled by default for single VM FR36 onwards.
Best Regards,
Sebastien
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