Less than 30% free, how will performance be degraded?
I'm getting messages that the free space is less than 30% and that performance will be degraded. Can anyone tell me what exactly will be degraded? I hope they don't mean transfer speeds. I don't run anything on this box. No services, snapshots, antivirus, etc. Just smb.
I'm a bit salty about the 30% too. Does the system need that much headroom? It's down right rediculous IMO.
Thanks.
Model: EDA500|ReadyNAS Expansion Chassis 5-Bay,RN31200|ReadyNAS 300 Series 2-Bay
Re: Less than 30% free, how will performance be degraded?
The performance of read/writing to the volume is at greater risk of degrading as free space is less than 30%. As to when you'll start to see a noticeable difference in transfer speeds that depends on a variety of factors. That may not be till it's say over 80%.
In any case you should consider expanding your volume or freeing up some space.
Re: Less than 30% free, how will performance be degraded?
Thanks for your help, mgdm. I will see how it goes. I'm just using the nas to stream to my Dune players, so a solid MB/s transfer rate is all I am after. I'm throwing 2 more disks in the array (which is what triggered the other thread re: the resync). I just don't think I can afford to waste 30 or even 20%. Is this common among all NAS products? Do dofferent brands require less overhead than others?
Do dofferent brands require less overhead than others?
It's not really about the brand, it's the choice of file system. EXT is the traditional choice, but many newer NAS - including ReadyNAS - have switched to BTRFS. BTRFS is in many ways superior, but it does need more free space. One reason is that metadata and data share the same space pool - ext reserves space up from for metatdata (inodes).
In my experience, 30% is pretty conservative, you can get by with 20%. If you turn snapshots off, you can probably get by with 15%.
