-
- Novice
- Posts: 8
- Liked: never
- Joined: Jun 22, 2012 3:34 pm
- Full Name: George Lambson
- Contact:
Pinpointing Bottlenecks
Does anyone have any suggestions for pinpointing the bottleneck in backup processes? The report shows my source is the bottleneck, but I'm not quite sure where to go from there.
-
- Veeam Software
- Posts: 21139
- Liked: 2141 times
- Joined: Jul 11, 2011 10:22 am
- Full Name: Alexander Fogelson
- Contact:
Re: Pinpointing Bottlenecks
George, that means that source storage data retrieval speed is a bottleneck. What is your setup and what transport mode do you use to read the VMs data from the storage?
-
- Novice
- Posts: 8
- Liked: never
- Joined: Jun 22, 2012 3:34 pm
- Full Name: George Lambson
- Contact:
Re: Pinpointing Bottlenecks
I am running Hyper-V and the VHDs are on an iSCSI storage device directly attached to the host server. I have done some HDD throughput tests and the results are nearly the same as local storage.
-
- Novice
- Posts: 8
- Liked: never
- Joined: Jun 22, 2012 3:34 pm
- Full Name: George Lambson
- Contact:
Re: Pinpointing Bottlenecks
BTW, these are incremental backups as where the first full backup shows the network to be the bottleneck at 98% which is what I would expect going over a VPN to an off-site location. Is it normal to see the source as the bottleneck at 99% with an incremental backup?
-
- Chief Product Officer
- Posts: 31814
- Liked: 7302 times
- Joined: Jan 01, 2006 1:01 am
- Location: Baar, Switzerland
- Contact:
Re: Pinpointing Bottlenecks
Yes, especially if CBT is not used.
-
- Novice
- Posts: 8
- Liked: never
- Joined: Jun 22, 2012 3:34 pm
- Full Name: George Lambson
- Contact:
Re: Pinpointing Bottlenecks
CBT is enabled.
-
- Chief Product Officer
- Posts: 31814
- Liked: 7302 times
- Joined: Jan 01, 2006 1:01 am
- Location: Baar, Switzerland
- Contact:
Re: Pinpointing Bottlenecks
"Enabled" is not equal to "Used" though
Do you see [CBT] letter next to each virtual disk in the real-time statistics?
Do you see [CBT] letter next to each virtual disk in the real-time statistics?
-
- Novice
- Posts: 8
- Liked: never
- Joined: Jun 22, 2012 3:34 pm
- Full Name: George Lambson
- Contact:
Re: Pinpointing Bottlenecks
Good to know. Yes it is there. It also shows it was read at 4MB/s. Is there a place I might be limiting the job to that 4MB/s? My repository is limited to 3MB/s because it's going over a WAN, but I don't see anywhere else to limit a data ingestion/througput rate.
-
- Chief Product Officer
- Posts: 31814
- Liked: 7302 times
- Joined: Jan 01, 2006 1:01 am
- Location: Baar, Switzerland
- Contact:
Re: Pinpointing Bottlenecks
Bad random I/O performance of the storage, for example.
-
- Expert
- Posts: 152
- Liked: 24 times
- Joined: May 16, 2011 4:00 am
- Full Name: Alex Macaronis
- Location: Brisbane, Australia
- Contact:
Re: Pinpointing Bottlenecks
I've been trying to pinpoint the bottleneck in my system - i have a similar issue.
The random read/write you speak of - what block size would be used?
The random read/write you speak of - what block size would be used?
-
- Chief Product Officer
- Posts: 31814
- Liked: 7302 times
- Joined: Jan 01, 2006 1:01 am
- Location: Baar, Switzerland
- Contact:
Re: Pinpointing Bottlenecks
No idea... but you can launch Process Monitor and see for yourself.
-
- VeeaMVP
- Posts: 6166
- Liked: 1971 times
- Joined: Jul 26, 2009 3:39 pm
- Full Name: Luca Dell'Oca
- Location: Varese, Italy
- Contact:
Re: Pinpointing Bottlenecks
If your storage has some kind of management console, you can take a look at it and see the performances during backup activities, like IOPS or MBs. Also, knowing model and disks could help to understand the estimated speed and check it against the real speed.
Luca.
Luca.
Luca Dell'Oca
Principal EMEA Cloud Architect @ Veeam Software
@dellock6
https://www.virtualtothecore.com/
vExpert 2011 -> 2022
Veeam VMCE #1
Principal EMEA Cloud Architect @ Veeam Software
@dellock6
https://www.virtualtothecore.com/
vExpert 2011 -> 2022
Veeam VMCE #1
-
- Expert
- Posts: 176
- Liked: 21 times
- Joined: Jul 08, 2011 8:16 am
- Contact:
Re: Pinpointing Bottlenecks
is hyper-v "onhost" or "offhost" proxy used?
Who is online
Users browsing this forum: No registered users and 69 guests