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https://issues.apache.org/jira/browse/VCL-816?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14315216#comment-14315216
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ASF subversion and git services commented on VCL-816:
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Commit 1658844 from [~arkurth] in branch 'vcl/trunk'
[ https://svn.apache.org/r1658844 ]
VCL-816
Added "-n" switch to the command in utils.pm::nmap_port. This causes the
command to run much faster.
VCL-16
Changed utils.pm::get_request_info to use cached info by default. For large
cluster requests, each reservation process was retrieving the same image and
other information over and over - n-squared problem.
VCL-174
Removed section from utils.pm::get_request_info which populates the natport
table. This was being done by every cluster reservation for all other cluster
reservations. Moved to State.pm::initialize.
Updated utils.pm::get_computer_info to only call get_computer_nathost_info if a
nathostcomputermap entry exists for the computer.
> Nmap is very slow due to DNS
> ----------------------------
>
> Key: VCL-816
> URL: https://issues.apache.org/jira/browse/VCL-816
> Project: VCL
> Issue Type: Improvement
> Components: vcld (backend)
> Reporter: Andy Kurth
> Assignee: Andy Kurth
> Priority: Minor
> Fix For: 2.4
>
>
> The backend code uses the nmap utility to determine if a remote node is
> responding to SSH. This may take several seconds if DNS isn't configured.
> There is a "-n" switch which causes the commands to run much quicker.
> The switch should probably be added. We need to test how it works with both
> hostnames and IP addresses.
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