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The dshbak command is a part of pdsh package. It is actually a filter rather than a stand-alone tool. This command allow to format output so that output from each server appeared in one place not scattersin verious places on the listing as phsh output each line of output whne it arrives. For example:
pdsh -a date | dshbak
Output from the dsh command is captured by dshbak and displayed on a per-node basis.
As this is a standalone Perl script the current version can be downloaded from pdsh-scripts at master · chaos-pdsh
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Feb 27, 2021 | sourceforge.net
Hm, this seems like a good idea, but I'm not sure dshbak is the right place for this. (That script is meant to simply reformat output which is prefixed by "node: ") If you'd like to track up/down nodes, you should check out Al Chu's Cerebro and whatsup/libnodeupdown: http://www.llnl.gov/linux/cerebro/cerebro.html http://www.llnl.gov/linux/whatsup/ But I do realize that reporting nodes that did not respond to pdsh would also be a good feature. However, it seems to me that pdsh itself would have to do this work, because only it knows the list of hosts originally targeted. (How would dshbak know this?) As an alternative I sometimes use something like this: # pdsh -a true 2>&1 | sed 's/^[^:]*: //' | dshbak -c ---------------- emcr[73,138,165,293,313,331,357,386,389,481,493,499,519,522,526,536,548,553,560,564,574,601,604,612,618,636,646,655,665,676,678,693,700-701,703,706,711,713,715,717-718,724,733,737,740,759,767,779,817,840,851,890] ---------------- mcmd: connect failed: No route to host ---------------- emcrj ---------------- mcmd: xpoll: protocol failure in circuit setup i.e. strip off the leading pdsh@...: and send all errors to stdout. Then collect errors with dshbak to see which hosts are not reachable. Maybe we should add an option to pdsh to issue a report of failed hosts at the end of execution? mark >
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