Hi,
I still have a huge performance issue with Open-E DSS v6.
My server configuration :
Xeon L5520 (4 quad cores)
8DDR3 ECC
5x Crucial RealSSD 256Gio (290Mio/s in SATA2 per SSD)
3x Intel e1000 Gigabits Ethernet
The 3 networks cards are in bonding (802.3ad) and the SSDs are in software Raid5 (using DSS) so I should get a 3Gbit/s connection and a very high bandwidth capacity for the disks (I except more than 800Mio/s in local).
But the problem is that I don't even managed to have more than 100Mio/s per iSCSI volume ! The speed is not stable and various between 20Mio/s and 100Mio/s even if the client is 2 or 3 links bonded.
I tried to connect a client to the SAN directly (without using a switch) and I still have the problems.
Since there could be few things causing lowered performance except hardware failure so the best thing to do first is to download logs from DSS (in Web GUI -> Status -> Hardware -> Logs) and search tests.log file for:
1) hdparm - to check actual raid performance
2) ethtool - to check actual network cards speed
3) ifconfig - to see if there is any packet loss (errors in network transmission)
Please take a look at it cause it may be for example cards are running only 100MBps mode for some reason.
I did the test :
*-----------------------------------------------------------------------------*
hdparm -t /dev/sda
*-----------------------------------------------------------------------------*
/dev/sda:
Timing buffered disk reads: 774 MB in 3.00 seconds = 257.96 MB/sec
You need a small update for your NIC card, as you are having build up75, so please open a support ticket, and ask me to send you a Small Update files.
0852-DSS_V6_up75-Intel_1Gbps_NIC_driver_set
0853-DSS_V6_up75-Intel_10Gbps_NIC_driver_set
I'm still using the Lite version since I don't know if DSS will works well with my configuration, so I can't open a support ticket.
What should I do ? Pay for support for obtaining a patch who will maybe not solves my problems?
Thanks however
*-----------------------------------------------------------------------------*
ifconfig -a
*-----------------------------------------------------------------------------*