SLIC/Lumberjack: support formatting RANK_COUNT and RANKS

[white238]

Currently Lumberjack only reports the following through SLIC's formatting options "<RANKS_COUNT>: ". It has been requested to be allowed to have more control of this and add both options.

@gzagaris you okay with this? or an alternate idea?

[gzagaris]

Hi @white238 -- generally I think I am OK with this.

To clarify, the request is to have both <RANK_COUNT>, which would print the total number of ranks that generated a log message and <RANKS> which prints the "first" N ranks that logged a particular message, where N is the threshold limit set in Lumberjack.

Is this correct?

[white238]

Yepp..

[rhornung67]

In addition, improve the reporting of which ranks generated the message. See also: #283

[gberg617]

Hi @white238 -- generally I think I am OK with this.

To clarify, the request is to have both <RANK_COUNT>, which would print the total number of ranks that generated a log message and <RANKS> which prints the "first" N ranks that logged a particular message, where N is the threshold limit set in Lumberjack.

Is this correct?

@white238 @bmhan12 This comment above is particularly relevant right now for switching to SLIC. Would something like what's being suggested above still be possible?

[white238]

This should be easy to implement, we just abstained due to the person who asked didn't get around to using SLIC/Lumberjack themselves and it was a breaking change. I can do it.