Slow Restore on FT

Question

Hello,&nbsp;I am running a restore over FT for FS. The backup for this FS works way faster than the restore speed.Media Server : 5240 Appliance running 773SIZE_DATA_BUFFERS_FT : 262144NUMBERS_DATA_BUFFERS_FT : 16 ( i have tried usinig different values but no luck in tuning restore speed.)Client : Solaris 11 runing NBU 773The backup selection on source client is a NFS mount. backup works&nbsp;@ 200 Mbps average but restore to same NFS mount starts with 16 Mbps but gradually lows down to 3-4 Mbps.Any suggestions pointers please.Thanks.

quebek · Answer

HiWhat are the write speeds on this system locally? Can you test this? I would have checked the raid card cache settings - write one.... or spoken with your storage team if the LUN where this FS do reside is from SAN...

pats729 · Answer

The NFS i am running restore to is from ZFS storage and mounted to NBU client over NFS. Do you still want me to check cache settings ?

quebek · Answer

hmm NFS mounts and FT... ok.so checking cache is not really needed... What is the write speed on this NFS &nbsp;- can you test it... except FT there is also some Network involved - I assume 10Gbps since you did have 200MB/s read speeds.... what about writes to this nfs from this client itsefl without involving NBU...??

tunix2k · Answer

Hi,additional to Quebeks suggestions to test the nfs write speed without NBU you should perform a FT restore to al local filesystem (extra zfs possible?). Both test will give a hint where to search for the root cause Ft or nfs or both in combination.&nbsp;ciaotunix2k

pats729 · Answer

thanks&nbsp;tunix2k&nbsp;thats the same thing was on my mind. I am trying to get a local lun and then perform the restore.However, i happend to discuss this with our storage admin and understood that the NFS mount is coming from a RAID5 ZFS volume. As we all know... RAID5 does not gives a super performance 70:30 (read:write) ratio is what i know.I was also checking statistics which showd a slow write performance on RAID5. I think NBU is out of question for now.Thanks for the help :-)&nbsp;

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Slow Restore on FT

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