ftp transfer rate issue..between two unix hosts

[chindi]

Hi Alzhy ,

Two sites are connected by Point-to-point Leased lines...

We had ensured that there is no data transfer between two hosts over d WAN ...

Hi Earl ,

M working on ur soln , will intimate u asap.

[Alzhy]

I don't think the ISSUE is on your UNIX machine configuration sir. It must be your network.

If you can do Gigabit speeds between HP-UX machines on your LANs - then there should be no reason to suspect there is a network configuration issue on your HP-UX machins sir.

This is how I usually test via FTP to test full bandiwdth vaailable on my LAN:

ftp> put "|dd if=/dev/zero bs=1024k count=1024" /dev/null

it avoids disk I/O so it discounts the effect of slow filesystems.

[chindi]

Hi Earl,

You were spot on :)

Wen increased buffer size to 8192 i got a transfer speed of 5 MB/sec which was desperately needed...between 2 unix hosts...
Now my 100MB file takes only 20.82 sec which was previously taking 117 sec .

But now i have another question , we are planning to use oracle dataguard to replicate our archive logs , but since dataguard uses tcp protocol for file transfer , kindly suggest a solution as to how we can achieve the same transfer rate for ORACLE DATAGUARD.

[Earl_Crowder · Accepted solution]

First, read
http://www.oracle.com/technetwork/database/features/availability/dataguardnetwork-092224.html

and
http://en.wikipedia.org/wiki/Bandwidth-delay_product

Lots of good references in the oracle document.

[Alzhy]

This may help your Dataguard network tuning.

http://blogs.oracle.com/AlejandroVargas/dataguard/Formula%20to%20Calculate%20TCP%20Socket%20Buffer%20Sizes.pdf

I have tried the ftpd buffers on my Linux and 11.11 systems (just out of curiosity) and it had no effect. We have an OC3 WAN.

[chindi]

Hi Earl ,

Thank you very much for the solution :)
Also do let me know if you can find any other references for oracle dataguard reg log transfer protocol.

Thanks again .