Updates to documentation and minor fixes

tools/README.md

@@ -156,9 +156,10 @@ The currently supported operations are *delta*, *delta_t*, *derivative* and *int
 
 > NOTE        Quoting of the dcdbquery command in the shell might be required to ensure proper parsing
  when using sensor operations.
-
-> NOTE 2       By default, the dcdbquery tool only returns data for sensors that are correctly
-published. This check can be bypassed by using the *-d* option.
+ 
+ 
+> NOTE 2 &ensp;&ensp;&ensp;&ensp;&ensp; When using the *-j* option to query sensors for specific jobs, the *<Start>* and
+*<End>* arguments are omitted, since they are inferred automatically from the job's start and end times.
 
 ## Examples <a name="dcdbqueryexamples"></a>
 
@@ -196,7 +197,7 @@ Sensor,Time,Value
 Visualizing the delta_t for the successive readings of a DRAM power sensor:
 
 ```bash
-dcdbquery -h 127.0.0.1 "delta_t(/sng/i01/r01/c01/s09/DRAM_POWER)" now-2h now
+dcdbquery -h 127.0.0.1 "delta_t(/i01/r01/c01/s09/DRAM_POWER)" now-2h now
 ``` 
 
 Sample output:
@@ -227,7 +228,7 @@ Sensor,Time,Delta_t
 Visualizing an unpublished sensor containing job-aggregated performance metrics:
 
 ```bash
-dcdbquery -h 127.0.0.1 -d /job800745/FLOPS now-20m now
+dcdbquery -h 127.0.0.1 /job800745/FLOPS now-20m now
 ``` 
 
 Sample output:
@@ -248,6 +249,45 @@ Sensor,Time,Value
 /job800745/FLOPS,2020-08-04T10:16:00.000722000,32887149173
 ``` 
 
+---
+
+Visualizing all of the *DRAM_POWER* sensor readings for the compute nodes on which job 781742 was running, throughout its runtime:
+
+```bash
+dcdbquery -h 127.0.0.1 -j 781742 DRAM_POWER
+``` 
+
+Sample output:
+
+```
+dcdbquery 0.4.144-g777a70c (libdcdb 0.4.144-g777a70c)
+
+Sensor,Time,Value
+/i01/r01/c01/s11/DRAM_POWER,2020-08-10T07:28:00.001173000,22
+/i01/r01/c01/s11/DRAM_POWER,2020-08-10T07:30:00.000168000,19
+/i01/r01/c01/s11/DRAM_POWER,2020-08-10T07:32:00.000867000,20
+/i01/r01/c01/s11/DRAM_POWER,2020-08-10T07:34:00.000446000,20
+/i01/r01/c01/s11/DRAM_POWER,2020-08-10T07:36:00.000098000,20
+/i01/r01/c01/s11/DRAM_POWER,2020-08-10T07:38:00.000814000,21
+/i01/r01/c01/s11/DRAM_POWER,2020-08-10T07:40:00.000843000,21
+/i01/r01/c01/s11/DRAM_POWER,2020-08-10T07:42:00.000090000,22
+/i01/r01/c01/s11/DRAM_POWER,2020-08-10T07:44:00.000408000,21
+/i01/r01/c01/s11/DRAM_POWER,2020-08-10T07:46:00.000086000,19
+/i01/r01/c01/s11/DRAM_POWER,2020-08-10T07:48:00.000440000,20
+Sensor,Time,Value
+/i01/r01/c01/s12/DRAM_POWER,2020-08-10T07:28:00.001173000,20
+/i01/r01/c01/s12/DRAM_POWER,2020-08-10T07:30:00.000168000,20
+/i01/r01/c01/s12/DRAM_POWER,2020-08-10T07:32:00.000867000,21
+/i01/r01/c01/s12/DRAM_POWER,2020-08-10T07:34:00.000446000,21
+/i01/r01/c01/s12/DRAM_POWER,2020-08-10T07:36:00.000098000,21
+/i01/r01/c01/s12/DRAM_POWER,2020-08-10T07:38:00.000814000,21
+/i01/r01/c01/s12/DRAM_POWER,2020-08-10T07:40:00.000843000,21
+/i01/r01/c01/s12/DRAM_POWER,2020-08-10T07:42:00.000090000,21
+/i01/r01/c01/s12/DRAM_POWER,2020-08-10T07:44:00.000408000,20
+/i01/r01/c01/s12/DRAM_POWER,2020-08-10T07:46:00.000086000,21
+/i01/r01/c01/s12/DRAM_POWER,2020-08-10T07:48:00.000440000,20
+``` 
+
 # The dcdbslurmjob Tool <a name="dcdbconfig"></a>
 
 The *dcdbslurmjob* tool allows to manually insert job information in the Apache Cassandra database. Its syntax is the

tools/dcdbslurmjob/dcdbslurmjob.cpp

@@ -447,7 +447,7 @@ int main(int argc, char** argv) {
 			    retCode = 1;
 			    goto exit;
 		    }
-	    } while(!done && getTimestamp() - startTs < S_TO_NS(timeout));
+	    } while(!done && getTimestamp() - startTs < (uint64_t)S_TO_NS(timeout));
     }
 
 //hasta la vista