cancel
Showing results for 
Search instead for 
Did you mean: 

VMWare VMDK backup slow

mvdijck
Level 3

Hi,

We need help or advise with the following.
Whe are looking for a new backup software solution

We have a trail version running Backup Exec 2014 on windows 2012 R2

We need:
Data 2 disk duplicate 2 tape

We have:
 full flash SAN 10Gb controllers
10gb switches
2 New ESX hots
1 fyscal back-up server with SSD mirror and nearline SAS 7.2K  raid 10 for our  18,2 TB disk storage
with 2x 10 GB controllers in a team.

Symantec is to slow and we do not know why.
Full backup to disk 13 hours 3,6 TB, Verify in a sepperate job 4 hours , Duplicate 8 hours (Tape unit TL2000 with utlrium 6 with SAS controller)

When i run a test job to disk with only virtual servers selected, connected to our pSphere server . It wil backup de vmdk files  3,2 TB in 6 hours.
job rate 160,5 MB/s

Veeam wil do the same in 3 hours and 45 minuts.rate max 384,1 MB/s processing rate 241 MB/s

What is wrong with Symantec config?

kind regards,

mvd

11 REPLIES 11

Colin_Weaver
Moderator
Moderator
Employee Accredited Certified

Are you backing up using SAN Transport or NBD?

mvdijck
Level 3

How to be sure?

I connect ot the pSphere server  and choose the vms

 

Virtual machine settings:

2015-04-02 14_51_41-Remote Desktop Manager [NLBSRV01].jpg

 

Colin_Weaver
Moderator
Moderator
Employee Accredited Certified

The job log will tell if SAN or NBD was used

mvdijck
Level 3

Transport mode 'nbd' was used

Colin_Weaver
Moderator
Moderator
Employee Accredited Certified

OK so nbd is typcially slower than SAN, but SAN requires a connection between the disk storage that holds your VMware datastore and your Backup Exec media server - I suspect you do not have such a connection hence it is falling back to the slower transport type. You may want to read up on the SAN Transport option (both VMware and BackuP Exec documentation)

 

Note I have no idea how you confirm what Veeam has been doing in order to compare.

mvdijck
Level 3
I did 2 tests. With Veeam selected de virtual servers and run an full Back-up to disk. 3 hous and 45 minutes. Same test with Symantec. This took 6 Hours. I can see that Veeam is using 3 gbps from the ethernet connection when pulling the date. Symantec only 1,4 gbps

mvdijck
Level 3

Is there a best practise voor de SAN soilution?

How to connect the backup server to the datastore?


Won't we get disk corrupution?

We have a Dell Compellet with 10 GB controllers 10 GB switches ESX host witk 10 GB controllers and a back-up server with 4 10GB controlers we are using 2 controllers in a team voor de network connection

 

thank you

mvdijck
Level 3

Is there a best practise for a SAN mode setup?
I can not find it in the manual.

How to connect the back-up server to the data store?

Won't we get disk corruption whem Symantec and VMware are using the Datastore's ?

What will the performance do in the SAN transport mode?

 

 

 

VJware
Level 6
Employee Accredited Certified

Use this KB for configuring SAN-Transport based backups - http://www.symantec.com/business/support/index?page=content&id=TECH155831

Secondly, what throughput do you receive when all GRT options & Checkpoint Restart, Pre-scan options are disabled from the backup job ?

EDIT**

This KB could help as well - http://www.symantec.com/business/support/index?page=content&id=TECH185691

mvdijck
Level 3

Thank you:

I found the same documents with google.

I did the test you requested but i won't go  above 1,5 Gbps range 1 -1,5 Gbps

mvdijck
Level 3

Hi,

Today:

I put a 2e broadcom dual 10gbps controller in our back-up server.
I connected the controllers with our 10 GB switches and set up an iscsi lun multi path IO.

Automount is disabled on the BE server

I created an iscsi lun with a test datastore. On this store i have 4 test VM's

I can see BE is pulling data over the iscsi lun but still to slow.

banthwith is not beeing used some small pieks to max 4 gbps but than again 1,4 gbps ethernet..

Please advice

SAN mode is juist a littlebit faster than NBD...