Classification: Public
Do you have access to any other kind of transfer mechanism, and if so,
does it happen with that too? (thinking Connect:Direct for example).
Is the target device of the transfer the same on fast vs slow?
Andy Styles
z/Series Systems Programmer
-----Original Message-----
From: IBM Mainframe Discussion List <[email protected]> On Behalf
Of Jousma, David
Sent: Thursday, March 28, 2024 1:14 PM
To: [email protected]
Subject: Re: Slow FTP's
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There is, but same for all lpars involved.
Dave Jousma
Vice President | Director, Technology Engineering
From: IBM Mainframe Discussion List <[email protected]> on behalf
of Joe Monk <[email protected]>
Date: Thursday, March 28, 2024 at 9:12 AM
To: [email protected] <[email protected]>
Subject: Re: Slow FTP's
Is there a firewall or switch in the path? Joe On Thu, Mar 28, 2024 at 8:
03 AM Jousma, David < 000001a0403c5dc1-dmarc-request@ listserv. ua. edu>
wrote: > Joe, > > I had not, just did, worse yet > > EZA1485I 12902400 bytes
Is there a firewall or switch in the path?
Joe
On Thu, Mar 28, 2024 at 8:03 AM Jousma, David <
[email protected]> wrote:
Joe,
I had not, just did, worse yet
EZA1485I 12902400 bytes transferred - 10 second interval rate 1281.27
KB/sec - Overall transfer rate 1281.27 KB/sec
EZA1485I 21381120 bytes transferred - 10 second interval rate 838.65
KB/sec - Overall transfer rate 1059.52 KB/sec
EZA1485I 29491200 bytes transferred - 10 second interval rate 791.23
KB/sec - Overall transfer rate 969.15 KB/sec
Dave Jousma
Vice President | Director, Technology Engineering
From: IBM Mainframe Discussion List <[email protected]> on
behalf
of Joe Monk <[email protected]>
Date: Thursday, March 28, 2024 at 8:56 AM
To: [email protected] <[email protected]>
Subject: Re: Slow FTP's
Have you tried MODE S (streaming) and TYPE E? Joe On Thu, Mar 28, 2024
at
7: 31 AM Jousma, David < 000001a0403c5dc1-dmarc-request@ listserv. ua.
edu> wrote: > All, > > Grasping at straws here, IBM support center is
baffled too. >
Have you tried MODE S (streaming) and TYPE E?
Joe
On Thu, Mar 28, 2024 at 7:31 AM Jousma, David <
[email protected]> wrote:
All,
Grasping at straws here, IBM support center is baffled too.
To clone z/OS maintenance to various disconnected sysplex’s I do a
DFDSS
dump, and FTP it everywhere it needs to be. Its roughly a 50Gb file
transfer. There is some environmental issue causing slow file
transfers
to
some systems (40mb’s a sec) and fast file transfers (150Mb/sec) to
other
systems on the same CEC. With IBM support help, we’ve narrowed down
the
problem to the specification of MODE B and EBCDIC on the transfer
since
it
is a DSS dump. Remove those, and the transfer is fast on the slow
systems, and still fast on the fast systems. Obviously that isn’t a
solution though.
So, we are a GDPS shop. The oddity is that all the “fast” transfers
are
to the K systems(control systems), and all the “slow” transfers are
to
the
traditional application systems. TEST, DEV, PROD makes no difference,
nor
does LPAR busy or not busy.
It seems there is something configured differently on the “slow”
systems
that is affecting mode b, ebcdic file transfers, but for the life of
me,
I
cannot put my finger on what, nor can the support center, except
that the
issue is at the remote end, in that the OS cannot offload the data
fast
enough, so TCPIP/FTP is slowing the transfer pace.
A virtual adult beverage of choice to the one that can point in a
direction to look….
Dave Jousma
Vice President | Director, Technology Engineering
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