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Fwd: Re: Parallel save streams per save set?
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Fwd: Re: Parallel save streams per save set?

Posted by George Sinclair - NOAA Federal 
George Sinclair - NOAA Federal
Fwd: Re: Parallel save streams per save set?
October 04, 2019 07:59PM
-------- Forwarded Message --------
Subject: Re: [EMC-DataProtection-L] Parallel save streams per save set?
Date: Fri, 4 Oct 2019 15:26:14 -0400
From: George Sinclair - NOAA Federal <george.sinclair@noaa.gov>
To: Preston de Guise <enterprise.backup@gmail.com>



On 10/3/19 10:48 PM, Preston de Guise wrote:
> Hi George,
>
>>>
>>>> 2. How would you perform a save set recovery of these pieces? Is
>>>> that possible if the stream option is enabled?
>>> If you were to do a saveset recovery, you would do a saveset
>>> recovery of all SSIDs associated with the backup.
>> Thanks, much :). So let's say there's four chunks. If I only wanted a
>> single subdirectory then I would run the recovery like this?:
>>
>> recover -s server -S ssid1 ssid2 ssid3 ssid4 /path/desired_subdir
>
> That might work, I've never tried doing a multiple SSID recovery and
> specify a path - wouldn't hurt to check.
Thanks. I was just offering that as an example to ensure that I was
inferring correctly from your first response. I'll have to play around
with this more. I've only recovered (CLI recover tool) from multiple
ssids on a few occasions (I may not be remembering correctly, though?),
but it wasn't a situation where the ssids were dependents of the same
parent save set as with PSS. They may have been completely different
save sets. Best case, if there was any relation then it was that they
were different backup instances of the same save set, maybe not from
contiguous backups, however.
>
>> How do you collate these pieces? How do you know which ones go with
>> the same backup? Is it just a matter of common sense based on media
>> database fields that would separate it from a different (or
>> subsequent) backup like start and completion times and the group
>> name? Is there any danger or concerns here, e.g. media database
>> reporting or indexes?
>
> NetWorker maintains extended saveset attributes to allow it to track
> and know which SSIDs in a PSS backup depend on each other. Check out
> here for more details on how to see that yourself:
>
> https://nsrd.info/blog/2019/03/20/basics-determining-pss-saveset-dependencies/

Nice article! I haven't used the '-S' option too often. A little
understanding of the layout and the script should do the trick.
>
> Cheers,
> Preston.
>
>> -- George Sinclair
>> Voice: (301) 713-4921
>> - The preceding message is personal and does not reflect any official
>> or unofficial position of the United States Department of Commerce -
>> - Any opinions expressed in this message are NOT those of the US Govt. -
>>
>>
>> --
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--
George Sinclair
Voice: (301) 713-4921
- The preceding message is personal and does not reflect any official or unofficial position of the United States Department of Commerce -
- Any opinions expressed in this message are NOT those of the US Govt. -



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