Equallogic iSCSI and Broadcom = slow backup speed

VMware specific discussions

Re: Equallogic iSCSI and Broadcom = slow backup speed

Veeam Logoby Andreas Neufert » Mon Aug 20, 2012 7:35 am 1 person likes this post

My 2 cents to this:

You can also try enabling disk alignment (Google) if you using Linux or Windows 2003 R2 (or older) as Repository.

Also check your NTFS formated block size vs. your Disk System block size.
If you have very big NTFS block size and very small disk system blocks => many drives are used to store one block => big Raid performance overhead
If you have very small NTFS block size and very big disk system blocks => only one drive will be used for multible blocke => Write performance are reduced to the performance of a single disk
A good size is NTFS 1/2 the size of a disk system block (1:1 isn´t best because you normally didn´t start to write things on the first bit of a disk storage block).
Andreas Neufert
Veeam Software
 
Posts: 2289
Liked: 384 times
Joined: Wed May 04, 2011 8:36 am
Location: Germany
Full Name: @AndyandtheVMs Veeam PM

Re: Equallogic iSCSI and Broadcom = slow backup speed

Veeam Logoby J1mbo » Tue Aug 21, 2012 8:20 am

Andreas Neufert wrote:(1:1 isn´t best because you normally didn´t start to write things on the first bit of a disk storage block).


On 2k3 use diskpart to create the partition; create partition primary align=1024, then 64K NTFS block size could indeed be aligned with 64K RAID stripe size.

Interesting that Broadcom are singled out here. My own experience is similar; I don't know why Dell and everyone else don't just use Intel NICs for everything since they in my experience they always work well and rarely fail as well as being cheap and having near universal driver support, to get you going at least. Just MHO of course :)
J1mbo
Expert
 
Posts: 261
Liked: 29 times
Joined: Tue May 03, 2011 12:51 pm
Full Name: James Pearce

Re: Equallogic iSCSI and Broadcom = slow backup speed

Veeam Logoby Andreas Neufert » Tue Aug 21, 2012 8:37 am

Hi,

NTFS blocks will not be filled 100% each time.
Storage Blocks will be filled 100%

So it happens than you write one NTFS block to more then one Storage block.
1:2 means that you have more chance to store one NTFS block on one storage block => Which ends up in better performance.
Andreas Neufert
Veeam Software
 
Posts: 2289
Liked: 384 times
Joined: Wed May 04, 2011 8:36 am
Location: Germany
Full Name: @AndyandtheVMs Veeam PM

Re: Equallogic iSCSI and Broadcom = slow backup speed

Veeam Logoby J1mbo » Tue Aug 21, 2012 8:49 am

Why not; the minimum NTFS transfer unit is the cluster size?
J1mbo
Expert
 
Posts: 261
Liked: 29 times
Joined: Tue May 03, 2011 12:51 pm
Full Name: James Pearce

Re: Equallogic iSCSI and Broadcom = slow backup speed

Veeam Logoby jkeegan » Thu Oct 25, 2012 8:51 am

if I'm doing VEEAM backups directly from the SAN (Dell Equallogic) where:

Veeam is a VM in Vsphere 5
VM has (2) dedicated Nics in the storage segment (separate physical segment)
The target for VM backups is a Buffalo NAS

Should the NAS be on the LAN segment or the STORAGE segment? Currently I have it on the LAN segment and I'm getting rates in the 60mb/sec with a Cisco Catalyst 6509 as the LAN switch, and pair of dell PowerConnect 5424 switches as the storage segment.

Thoughts?
jkeegan
Lurker
 
Posts: 2
Liked: 1 time
Joined: Thu Oct 25, 2012 8:46 am
Full Name: Joseph Keegan

Re: Equallogic iSCSI and Broadcom = slow backup speed

Veeam Logoby Vitaliy S. » Fri Oct 26, 2012 11:37 am

Hi Joseph, If you want to separate your backup traffic from the production network, then placing your NAS box on the storage segment will be a good idea. Anyway, if you're happy with your current job performance, you can continue using your current configuration. Just my 2cents.
Vitaliy S.
Veeam Software
 
Posts: 19963
Liked: 1145 times
Joined: Mon Mar 30, 2009 9:13 am
Full Name: Vitaliy Safarov

[MERGED]Cant achieve 10Gb/s in Direct SAN access Windows 201

Veeam Logoby Abdullah.Amer » Fri Mar 17, 2017 4:10 pm

Hello Everyone,

We are evaluating Veeam 9.5 Backup and Recovery to backup all our virtual environment, simply the infrastructure: 2 EXSi 6.0u3 hosts, Vcenter 6.0 and Equalogic SAN PS6210. Using BCM57810 10Gb Nic, Netgear XS70T 10Gb switch.

Using the 10Gb network, I am trying to achieve a kind of a high backup speed in Veeam B+R. all the recommendation around suggesting going to the direct SAN access will get the best performance in terms of backup speed.
Thanks for the guide under [FAQ] Frequently Asked Questions https://forums.veeam.com/vmware-vsphere-f24/vmware-frequently-asked-questions-t9329.html#p39948 and to many urls like the justins IT blog http://www.jpaul.me/2010/08/the-missing-manual-part-1-veeam-b-r-direct-san-backups/ ...

I configured a physical windows 2012 r2 server with 2 Nics (10Gb for Backup , second 1Gb for production), iSCSI initiator, access to the Equalogic SAN, "diskpart, automount disable", connect to a LUN ... I can see the disk at the windows management disk, run the backup and getting max speed of 200MB/s :( . followed this link https://forums.veeam.com/veeam-backup-replication-f2/improving-direct-from-san-backup-speed-with-iscsi-san-t4093.html "netsh, interface, tcp, set global autotuninglevel=disable" no change :(, some recommendation under this link http://datacore.custhelp.com/app/answers/detail/a_id/1626/~/sansymphony---iscsi-best-practices ... no success neither. Therefore I have a 10Gb network, but just getting a 2Gb speed :(

Another test I mad is creating a VM Veeam B+R, getting 500MB/s. then created another VM Veeam on the other ESXi horst to use another Nic and resources and run 2 backup in parallel to the same target... I get 800MB/s at the target. this test is just to make sure there is no bottleneck at the source, destination, switch ...

So I think I am missing something in the physical SAN direct access method to get at least 800MB/s

much appreciated you efforts.

Kind regards,
Abdullah.Amer
Lurker
 
Posts: 2
Liked: never
Joined: Fri Mar 17, 2017 8:23 am
Full Name: Abdullah AMER

Re: Cant achieve 10Gb/s in Direct SAN access Windows 2012 R2

Veeam Logoby PTide » Fri Mar 17, 2017 4:24 pm

Hi and welcome to the community!

Another test I mad is creating a VM Veeam B+R, getting 500MB/s.
First of all, could you please provide the bottleneck stats for the job?

Thanks
PTide
Veeam Software
 
Posts: 3248
Liked: 272 times
Joined: Tue May 19, 2015 1:46 pm

Re: Cant achieve 10Gb/s in Direct SAN access Windows 2012 R2

Veeam Logoby Abdullah.Amer » Fri Mar 17, 2017 4:35 pm

Hi PTide,

Many thanks for your quick reply,
for the physical SAN direct access 200MB/s test its "Load: Source 99% > Proxy 54% > Network 21% > Target 0%" ,

for the first VM Veeam 500MB/s:

3/17/2017 4:02:44 AM :: Load: Source 27% > Proxy 35% > Network 98% > Target 5%
3/17/2017 3:47:38 AM :: Load: Source 32% > Proxy 35% > Network 54% > Target 32%
3/17/2017 3:41:40 AM :: Load: Source 53% > Proxy 53% > Network 80% > Target 34%
3/16/2017 4:45:25 PM :: Load: Source 16% > Proxy 44% > Network 72% > Target 51%
3/16/2017 4:47:16 AM :: Load: Source 14% > Proxy 45% > Network 77% > Target 43%
3/15/2017 4:38:35 AM :: Load: Source 15% > Proxy 45% > Network 66% > Target 53%
3/12/2017 11:42:25 PM :: Load: Source 21% > Proxy 76% > Network 76% > Target 34%

Cheers,
Abdullah.Amer
Lurker
 
Posts: 2
Liked: never
Joined: Fri Mar 17, 2017 8:23 am
Full Name: Abdullah AMER

Re: Equallogic iSCSI and Broadcom = slow backup speed

Veeam Logoby PTide » Fri Mar 17, 2017 5:02 pm

The problem that you experience resembles another problem with Equallogic and Broadcom (exactly the hardware that you have). Please carefully review this thread.

If none of the mentioned fixes (including firmware updates) help, then please contact our support team directly for a deeper investigation and post your case ID.

Thank you
PTide
Veeam Software
 
Posts: 3248
Liked: 272 times
Joined: Tue May 19, 2015 1:46 pm

Previous

Return to VMware vSphere



Who is online

Users browsing this forum: No registered users and 1 guest