Author Topic: Daily updates now using 1TB within PPU for even small changes, Normal?  (Read 1437 times)

Offline AjS

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I've been using FlexRAID for some time and recently added another 4TB drive to the RAID pool for a total of 16TB.  Data is largely media (TV/movies). 

Updates are scheduled to run daily.  If I run an UPDATE immediately after one is finished, it takes several hours and the PPU shows 1TB of new data.  I don't remember this happening before adding the 4TB drive and wanted to know if this sounds normal?

Offline AjS

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Re: Daily updates now using 1TB within PPU for even small changes, Normal?
« Reply #1 on: January 26, 2014, 07:15:03 am »
Didn't realize this was such a tough question, 2 weeks and nothing.  OH well.

Offline nostradamus99

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Re: Daily updates now using 1TB within PPU for even small changes, Normal?
« Reply #2 on: January 29, 2014, 01:27:07 pm »
maybe you can enable some more detailed logging to see what is being updated..?
MediaTank: Intel E6300 Core2Duo, 6 GB RAM with Windows 2008 R2, FlexRaid t2+ engine, RAID-F 2.0 u12 with 4 DRU's and 2x2TB PPU's so far

Offline Brahim

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Re: Daily updates now using 1TB within PPU for even small changes, Normal?
« Reply #3 on: January 29, 2014, 03:32:29 pm »
@AjS
When no one replies, it usually means more info is needed. It gets old to tell people "please provide more info".
By all accounts it is normal if you have 1TB of changes and not if you don't.  :-\

Now check the logs for what's being updated. Know this will provide you with several options:

1. You can prevent such changes if you know what program is making them in case they are necessary. There are many media apps out there that randomly change things willy nilly.

2. Enable differential check on those files (search for "diffCheck" here http://wiki.flexraid.com/2011/10/12/command-execute/ - and set the options through the advanced properties on the Web UI).
You will have to re-create the RAID. However, this will greatly reduce the actual update time in the future when those files are updated.
The typical usage for that feature is for files such as incremental backups. This will all RAID-F to process the differential rather than the whole file.

Offline AjS

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Re: Daily updates now using 1TB within PPU for even small changes, Normal?
« Reply #4 on: January 30, 2014, 08:24:32 pm »
Thank you, very helpful. 

The reason it seemed odd was because nothing has really changed on the system (to our knowledge) and only having 20-30gb changes overall - We work with large video files mostly so it's not changing much at all but we did have to rebuild the array so maybe something is indeed different.

We're looking at the other FLEXRAID solutions now as well.