themaxsti wrote:Hi all..
I have a 1815+ with 6Gb of RAM on 6.1-15047 U1
2 x lan in LACP link (MTU 1500). 4 x 4Gb WD Reds + 2 Samsung SSD for Cache. SMB 3 / SMB1 No encryption & NFS (This is how it was set in 6.0)
Since 6.1 iv been getting 50/75% the speed over SMB transfers as normal. around 45MB/s or 75MB/s. (See below)
i was getting 110MB/s on 6.0 (Managed this with turning off memory compression in control panel / Hardware and power / general.)
I still can do 110MB/s pc to pc but to the nas 75MB/s is the max (Both Windows 10 using the same Switch the 1815+ is on.)
Turn Encryption to AUTO in Control Panel / File Services / SMB / Advance I get 75MB/s.For 400MB of a file then 16MB/s the remainder.
If i set the 1815+ to SMB2 i cant connect so im guessing its using SMB3 Windows 10. (Dont have a old windows 7 computer any more the HDD Died digging it out to try).
Iv tried setting the SSD Cache from Skip sequential I/O on / off and also removing the SSD cache completely Nothing changes.
Also now get rubbish performance from my ESXI box over NFS but only Reads 18Mb sec, Writes are 110Mb sec. This makes it USELESS for VMWARE.
Any ideas as it gone from a dream box to a nightmare.
So Iv done some tests...
Synology 1815+ 6Gb total (Synology memory module not third party)
4xWD Red 4TB in SHA1
SSD Cache 2x Samsung 850 Pro 256Gb on the 4xWD Reds
LACP link to switch makes no difference if only one cable or 2. Can't remove for test as iv got MailPlus installed and you cant turn it LACP off with MailPlus installed (GERRRRrrrrrr)
PC to PC (Same Switch as Synology) 112MB/s Both Directions Windows 2012 R2 Srv / Windows 10
Proves Switch and PC to PC works as expected. (Single 1Gb link on both, MTU 1500, SSDs in both)
PC to Synology (SSD Cache on) Starts Good then falls to 16.4MB/s
Synology to PC (SSD Cache on) 71.2MB/s
PC to Synology (SSD Cache off) 69.9MB/s
Synology to PC (SSD Cache off) 72.4MB/s
PC to Synology (SSD Cache made into a Raid 0 EXT4 ) 42.7MB/s See note below.
Synology to PC (SSD Cache made into a Raid 0 EXT4 ) 73MB/s See note below.
Volume Use to the SSD Cache made into a raid 0 EXT4 was 100% from the PC to Synology..
All tests above from Windows 10 and Windows 2012 R2
Changing the MTU makes no difference as to be noticeable at all.
Still to test but loosing the will to live NFS to VMWare esxi, This can wait for another day.
Now i could live with 70MB/s BUT Why does adding SSDs kill performance, Also i could max out a 2xLACP link to the synology (both Directions) before 6.1
Really feel like smashing the box and posting it to synology and getting a QNAP. It does look like the volume has troble keeping up with the request comming in BUT WHY?????
After secure erasing both the SSDs.iv re created the Raid 0 SSD volume and read and write speed is the same as the HDDs. and the Volume use is back to 20%..
My guess is the synology are not using TRIM or its not enabled for me.