Slow ISCSI

[vkeven]

I finally found a network card for my poweredge 1900 so I tested DSS with this new server

Result=Slow


Server:

Dell Poweredge 1900 Xeon 5130 ( 4 CPU'S )
2GB RAM
146GB SAS 10K RAID0 on PERC5/i
1000Base/T PCI-X 64bit Broadcom 5703
Open-E Demo CD 1.16

This setup bench over 270MB/s on windoze


Client

HP ML350 2.8GHz Xeon
1GB RAM
Built-in 1000BaseT Broadcom
Windows 2000 SP4
Microsoft Initator 2.0.2


They are connected with a crossover cable

ISCSI-Target0 40GB = 57.1MB/s

This is equal to performance of any recent SATA drive in regular desktop computer , to slow for server room.My apple XRaid on fiber reach 116MB/s on 6 SATA drive's

[To-M]

I have seen speeds vary from 50MB /s to 80MB /s, with DSS version 1.18 from the Demo-CD you can enable Write Back for your iSCSI LUN. It should improve iSCSI performance.
Also try changing the in console CTRL. + ALT. + W then iSCSI Daemon options to increase MaxRecvDataSegmentLength to 65526 and MaxXmitDataSegmentLength to 65536

[vkeven]

Finally some good number


Server :

Dell PowerEdge 1900 5130 (4CPU)
2GB RAM 667MHZ
LSI Logic 7202 Fiber 2GB/s
AppleXRAID Raid5 with 6 drives and one hot spare ( connected to 1 fiber channel 2GB/s)
BroadCom PCI-X 64 bit 5703
Cisco 3750 Switch

Client :

HP Proliant DL380 G4 3.8GHz Xeon ( 4CPU)
2GB RAM
Windows 2003 Server
Built-In Broadcom


The Apple XRaid directly connected to this DL380 via fiber 2GB/s was able to reach 103.5MB/s burst rate and 85MB/s sustained. With Open-E over only one link gigabit the burst rate was 89.5MB/s and 70MB/s sustained , this was bench with HDTach , the real world file copy is little less but same as directly connected fiber XRaid

2097MB file write = 35 secs = 60MB/s ( real file copy )
2097MB file read = same = same

The thing that I miss in Open-E is server clustering , the power I need to reach good performance is simply to much . Open-E could you tell me how much MB/s your Intel SSR212 can push with his 2 Built-In Gigabit Interface over ISCSI ? . I know that this machine's are certified so I'm sure that you have some benchmark of it

[To-M]

Yes Clustering will happen but no set date (revised). Intel is assisting us on some numbers but they have not been released for the SSR212MC2. I will ask around to see if any of our lab engineers have any new updates on this.