Extreme Slow Replication on HP Hardware

[webguyz]

After you do the crossover cable try it without Jumbo Frames first and then enable JF on both DSS's and try it again. There must be a reason every generic reference to ISCI SANS talks about enabling Jumbo Frames.

[Manfred]

Sure, Jumbo Frames are a great Feature - but definitely not indispensable for using iSCSI.
There is no Performance Issue with iSCSI. iSCSI or NAS works well - only the
Replication ist very Slow 400 - 800 KByte/Sec.

But I will also try JF with 9000 Byte on the Replication Interface.

Thx for the Information!!

[Manfred]

Update:

Tried Crossover Cable - Replication still extreme slow.
Changed Mirror Interface (both Sides) to old INTEL Pro 100 - Replication only 40 - 60 KB/Sec.
Build a loadbalance/rr bond with two Broadcom Gigabit NIC's and used this for Replication.
Still slow: 400 - 800 KB/Sec. Same with 802.3ad Bond (BTW: OPEN-E TCP Testprogram
reports 100 MB/SEC with this Configuration)

[Manfred]

Anybody using Replication with HP Hardware?

[mageisler]

Hi,

i had the same issue with 2 StorageWorks X1600 from HP (looks like DL185G5). Also very slow replication over LAN. All other seems to work well.

Had anybody solved this problem?

Markus

[Manfred]

I'am in contact with OPEN-E Support. They didn't really solved the Problem yet, but one of the
OPEN-E Support Guy's improved the Performance up to 20 MB/Sec on my Lab Systems.
Probably there ist a Problem with the DRDB Configuration.

The OEPN-E Support Statement is: we are working.....

I'am in upbeat mood!

[budd79]

Hi there,

Did you get this resolved?

Thanks,

[jon hatton-brown]

Yes I am using HP DL180 G6's with Replication I was getting 600Kb/s replication speeds. Open-e Support had to remote into our DSS servers and tweak settings to get them to replicate at 60MB/s.

We are now looking at getting new RAID cards, as the HP Storageworks P212's are useless.

[joolsc]

Are there any details on what was done to achieve this faster speed? We have a similar situation with a couple of HP DL360's with MSA arrays, not getting as much throughput on the sync NIC's as I would expect, used both onboard and NC360T dual cards with similar results.