On Fri, 23 Aug 2013, john boris wrote:
Okay I am doing this from my iPhone so I am trying to answer everything
1. I am tied to scp because my COBOL app needs a program called eroded
which will not port to Linux I have a lot of that covered but we are moving
to PowerSchool in the cloud so I need these systems as is for historical
reasons
2. I have tested this with all 17 machines running on one of the hps and
although it works it is sluggish and file transfers suck
Ok, this is actually good news. It means that you have the ability to see where
your bottlenecks are and address them correctly with the new system instead of
just guessing.
A quick google search is telling me that the DL-160 G5 is
2 processor, 2-4 core (max 8 cores)
max 64G ram
2x 1G ethernet
4x hard drives (SATA or SAS)
how much ram and how many cores do you actually have?
unfortunantly a sluggish system and slow file transfers could be a lot of
things.
On the host OS, run 'iostat -xkt 60' or similar and look for a few things.
is there idle CPU or not?
is there a large amount of wait time?
do you have drives with amounts of I/O, especially ones that show utilization up
around 100%
Then look at memory stats (either from top, or cat /proc/meminfo)
are you using swap? how much free memory do you have (on a reasonably freshly
booted machine or shortly after a cache flush on the host OS)
You could just be running out of CPU, RAM, I/O, and/or network
setup something like MRTG to monitor your network I/O while the file transfer is
running, are your interfaces pegging at max throughput? or are they much lower
than the theoretical peak (if so, you will probably see issues with CPU/RAM)
If you see lots of wait with no idle CPU, I would look first at RAM.
If you see lots of wait, but there is still idle CPU, I would suspect that your
disk I/O is your bottleneck (which iostat should show)
17 systems going through a single Gig-E interface could be a problem if they are
all trying to do file transfers at once, does your network support 10G? if it
supports it, you should get it on your new server.
David Lang
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