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Platform: AIX 6.1. SSH Tectia Server: 6.1.9

When logging in to a SSH Tectia Server, I can notice a gap of about 2 seconds after the process "ssh-user-fileio" process is launched.

Please, see the extract of the SSH Tectia Server log:

debug[651448]: 02/03/2011 15:32:48:131  SecShUserProcess/secsh_user_process_unix.c:690: argv[5] = /opt/tectia/libexec/ssh-user-fileio.  
debug[651448]: 02/03/2011 15:32:48:132  SecShUserFileOps/secsh_user_fileops.c:660: Userprocess exec succesful, process handle 2014cea8  
debug[651448]: 02/03/2011 15:32:48:133  SecShUserFileOps/secsh_user_fileops.c:686: Allocated userfile context 0x2014c8a8  
debug[651448]: 02/03/2011 15:32:48:133  SecShUserFileOps/secsh_user_fileops.c:838: operation start for 2014c8a8.  
debug[651448]: 02/03/2011 15:32:48:133  SshNioPacketWrapper/sshnio_packet_wrapper.c:815: Packet added to send queue.  
debug[651448]: 02/03/2011 15:32:49:969  SecShUserFileOps/secsh_user_fileops.c:868: operation end for 2014c8a8.  

asked Apr 12 '11 at 13:11

SSH%20KB's gravatar image


edited Apr 12 '11 at 16:09

When ssh tectia server does the fork for launching the new process, it closes all inherited file descriptors. Hosts that have "unlimited" amount of file descriptors may suffer this penalty. For the session that starts the SSH Tectia Server, Tectia recommends to specify with a given number the amount of file descriptors, do not have it set as "unlimited", as it will attempt to close all of them.


answered Apr 12 '11 at 14:55

SSH%20KB's gravatar image


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Asked: Apr 12 '11 at 13:11

Seen: 2,693 times

Last updated: Apr 12 '11 at 16:09

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