Randy Doering wrote:
> -------------- Original message -------------- 
> 
> 
>>Randy Doering wrote: 
>>
>>>Greetings, I'm in the midst of trying to get a full backup of a file system 
>>>that is alittle of 4 TB and contains more than 132 Million files. 
>>>
>>>When I started this yesterday, I noticed it was backing up at around 20-22 
>>>MB/s, and I started to calculate how many hours this would take after it 
>>>had filled the first tape. 
>>>
>>>Well, today it is backing up at 150-190 KB/s and the System CPU is pegged. 
>>>At this rate, we looking at at least a month to get this backup finished. 
>>>We have concluded that the system is trying to keep the index information 
>>>and that is the reason for the slow down. 
>>>
>>>I have noticed a button in the Group that is called: "No Index Save". So, 
>>>what does this button actually mean? 
>>>
>>>We are in the middle of moving the file systems from an HP-EVA based file 
>>>system to an EMC Centerra, and was planning on restoring to the EMC 
>>>Centerra. 
>>>
>>>So, will using the "No Index Save" speed things along and more importantly 
>>>will I be able to restore? 
>>>
>>
>>Leaving aside any other potential solutions I will answer your question 
>>directly. The "No Index Save" attribute of your group is NOT what you 
>>are looking for. All this means is that at the and of the client save it 
>>will not save your client file index to tape. However, there is an 
>>option in the pool that will prevent the index being written to disk at 
>>all. This may make a small improvement to the backup performance but 
>>will of course reduce the ease of your restores.
> 
> Thanks Davina:
> I assume you are talking about the "Store Index Entries" option in the pool 
> resource. I may try this, and if I do what will be the consequences regarding 
> the restores?

Yes that's the one. Your restore options are:
(1) Save set recovery. This does allow individual file restores but only
if you know the exact full path.
(2) Scan the tape to populate the index.

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