Restore is running with very Low throughput.

Question

Master server: Window 2008,&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;NBU :7.5.0.4

Media server : Solaris 10,&nbsp; NBU :7.5.0.4

DR

Master server: Window 2008,&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;NBU :7.5.0.4

Client : Windows 2003(VM machine), NBU : 7.5.0.4

We are trying to windows client&nbsp; on over DR site. Restore is running with very low throughput

Nearly imposible to restore huge data of 10 TB.

Data is backed on tape with Solaris Media server with SIZE_DATA_BUFFER of 1048576.&nbsp; We did

Faced issue while importing tapes at DR site due to 1 MB block size, However we overcome it

By changing the block size on HBA card.

&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;Now we are facing challenges &nbsp;with Restore. We did replaced NIC with 10&nbsp; GB. But no use

In detailed Tab we do see buffer delay time.

mark_solutions · Answer

Never seen anyone use a buffe size that large! normally 256 is opmimum

Have you set the number of data buffers too?

jollyj · Answer

Number of Buffer are 128,

SIZE_DATA_BUFFERS&nbsp; are set 1048576 under the guidence of Symantec techsupport, to bump up the speed

on data domain, But it has adversly affected our DR site recovery.

&nbsp;

message in detailed Tab shows

&nbsp;" waited for empty buffer 6042 times, delayed 16176 times"

&nbsp;I thing there is no point it tunnig buffer parameters, If yes please let me know..

&nbsp;

dan_42 · Answer

Can you tell us what low throughput means? (Quantify)

stumpr2 · Answer

are you possibly restoring over the wan? Are you selecting proper copy number?

jollyj · Answer

It is Over the LAN and these are imported image (Primary copy)

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