Slow Block Level Recovery

Hello,

Environment

Networker: Networker Server v9 - VM

Data Domain: DD9500

Connectivity End to end: 10Gbps with Jumbo Frames

Testing Results

#1 Windows 2012 VM, 29 million files on V drive. 

     Image Level Backup took 24 hours (4.8TB)

     Image Level Restore of V drive to another server took 42 hours 32 mins... (4.8TB)

#2  Windows 2012 VM, 500GB E drive with 430GB of files (SQL Backups).

      Image Level Backup took 48 mins

      Image Level Restore to same VM (different drive) 2hrs 50mins.

      File Level Restore from same backup took 48mins.

I have a S1 case open with Dell EMC and nothing has come up so far - its been two weeks.

 

We are at a loss as to why Block Level Recovery is extremely slow.

We have Avamar 7.3 in house but that isn't suitable for backing up x millions of files, hence the use of Image based with Networker.

Does anyone have any ideas as to why this is slow? 

ddboost show stats interval 3 output

Backup         Post-comp         Network         Restore          Network      Backup   Restore

   KB/s          Written KB/s      In KB/s          KB/s           Out KB/s      Conn     Conn

--------------- --------------- --------------- --------------- ---------------  -------  -------

         56,697          57,275          57,281         199,061         199,061        2        1

         59,334          37,580          37,586         182,371         182,371        2        1

         58,802          31,591          31,597         194,178         194,178        2        1

         40,101          39,548          39,553         193,868         193,868        2        1

         61,971          36,016          36,023         199,739         199,739        2        1

         56,698          51,869          51,876         185,855         185,855        2        1

         63,310          51,178          51,185         203,781         203,781        2        1

         76,475          35,708          35,716         188,428         188,428        2        1

         56,697          40,744          40,750         173,080         173,080        2        1

         61,969          40,206          40,212         204,882         204,882        2        1

         43,513          43,740          43,746         203,535         203,535        2        1

         61,991          58,970          58,977         215,260         215,260        2        1

         69,883          28,031          28,039         215,706         215,706        2        1

         51,439          46,768          46,774         198,052         198,052        2        1

         55,397          39,241          39,247         193,891         193,891        2        1

         56,715          41,453          41,459         212,230         212,230        2        1

NIC on VM shows Receive rate around 1.6Gbps