DataDomain + Netbackup using as B2D

[Claudio_Veronez]

Hi there,

I would like to use a DD share (CIFS or NFS) mounted at my midia server like /DD

If i add this directory as a backup to disk, is that OK? licencing? performance? best practice?

What is your opinion? does anyone here uses a DD like that?

[Claudio_Veronez]

I have made the Tunes U told me ,and sent the same jobs

2 policies (same origin server) 2 x 10GB files each policy w/ allow multiple streams, soo 6 jobs to display, just 4 w/ bandwidth

4 jobs (single 10GBs each)

but I got almost the same result but a few less than the 25mbs.

I got 10mbs from each stream

how about the block size? in local disk and the CX3 Lun?

[teiva-boy]

I've got to be honest, I see much better performance overall on x86 system than on SPARC systems.

The only way SPARC has ever come close is with a lot of concurrent streams.  Some of Symantec's own internal testing for their dedupe confirms that, it took twice as many streams to get to the same performance of an x86 system.

I also see better performance on linux on x86, heck even Windows performs better I've seen than Solaris on SPARC or AIX on some sort of IBM platform...

They're great boxes, just not great backup platforms.

[Gdd]

I have already described poor backup performances on a Solaris T5240and a DD with DD Boost.

See:

https://www-secure.symantec.com/connect/forums/poor-performances-data-domain-dd-boost-ost-device-solaris

EMC support conclusion is that today, DD boost cannot go faster on this T5240 platform (about 32 MB/s max for each backup) due to CPU limitations.

The only solution was to use a 10 Gbs links between Solaris and DD without DD Boost => about 120 MB/s max for each backup).

[Claudio_Veronez]

I was reading this right now.That is a good ponit, the bootleneck is the Sparc single core processor, so I'll have to create a more streams to test.

Ok today I'll stress this server up,

I'll create a 10 stream of 10GB backup file

and a RMAN w/ 10 channels...

lets see who will cry first :)

thanks a Lot

[Gdd]

I have tested with a lot of streams (60 of 16 MB/s each !)...

But when the backup windows of a data base is short, DD boost cannot be used (most of the time, we replace LTO tapes by DD, so we need streams witrh almost the same data rate !).

[Claudio_Veronez]

I have used a 2 streams over a x84 (dual quad core), and I got close to 50mbs,

YES the bootleneck here is the processors clock per core.

I'll test some other things to ensure that.

Thanks a lot

[Claudio_Veronez]

Does Netbackup have any config to spread the process over more cores?

I ĺl have to create a lot of JOBS because even w/ multiple streams the streams of a single job devide that 25mbs.

[Claudio_Veronez]

Great P.O.C here,

I'll put a Oracle over VMWARE (2 blades x86 6-core) and see how dows Netbackup goes,

Snapshot copy should be an option.

- conclusion:

Sparc + Oracle + NB = 1 core throughput.per JOB not per stream.

[Claudio_Veronez]

using a NFS Share from DD to a V240.

mount -o llock,rw,rsize=32768,wsize=32768,hard <NFS To DD670> <Mount Point>

Dedup:

3.5x Dedup w/ my FIRST oracle offline backup,

3.0x Dedup w/ MSSQL

Performance:

25mbs w/ Sparc Processors at the source

80mbs w/ x86 Processors at the source

I'm using a Sun Fire V240 as media server and no bottleneck at the moment.

Network

using a 2GB (link Agg Active/Active conection)

2 eth to the network and 2 eth directly to the DD

I'm developing a sheet w/ data, I'll put the results of a week an post here,

I'll try the VTL next week.

I'm really impressed by the dedup rate. very nice. a put 2TB in a few more than 400GB and I am not backing the same server up, when I start the next full cicle the rate will increase real fast.