Oleg Cherkasov schreef op 20-10-2017 10:21:
On 19. okt. 2017 20:13, Xen wrote:
The main cause was a way too slow SSD but at the same time... that
sorta thing still shouldn't happen, locking up the entire system.
I haven't had a chance to try again with a faster SSD.
I have double checked with MegaRAID/CLI and all disks on that rig
(including SSD ones of course) are SAS 6Gb/s both devices and links.
My first thought about those SSDs was that those are slower than RAID5
however it seems not the case.
Could it be TRIMing issue because those are from 2012?
You mean that the SATA version is too low to interleave TRIMs with data
access?
Because I think that was the case with my mSata SSD.
I don't currently remember the sata version that allowed interleaving
but that SSD didn't reach or have it.
After trimming performance would go up greatly.
So I don't know about SAS but it might be similar right.
_______________________________________________
linux-lvm mailing list
linux-lvm@redhat.com
https://www.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
