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I’m running below command; I need to store the command’s output in a file but without headers.
I tried – yarn top | tail -n +8 (as yarn top works like Linux top it refreshes in every 3 seconds and repeats output)
yarn top
YARN top - 00:47:26, up 24d, 2:49, 0 active users, queue(s): root
NodeManager(s): 7 total, 7 active, 0 unhealthy, 0 decommissioned, 0 lost, 0 rebooted
Queue(s) Applications: 8 running, 111 submitted, 15 pending, 111 completed, 5 killed, 5 failed
Queue(s) Mem(GB): 100 available, 20 allocated, 0 pending, 0 reserved
Queue(s) VCores: 200 available, 2 allocated, 0 pending, 0 reserved
APPLICATIONID USER TYPE QUEUE #CONT #RCONT VCORES RVCORES MEM RMEM VCORESECS MEMSECS %PROGR TIME NAME
application_1484661449412_1115434 papp mapreduce default 3 0 3 0 16G 0G 28 172 5.00 00:00:00 EdmHdpIf-SRI
application_1484661449412_1115420 papp mapreduce default 2 0 2 0 12G 0G 86 545 95.00 00:00:00 oozie:launch
application_1484661449412_1115433 eapp mapreduce eapp 2 0 2 0 12G 0G 23 160 5.00 00:00:00 oozie:launch
application_1484661449412_1115386 eapp mapreduce eapp 2 0 2 0 12G 0G 250 1524 95.00 00:00:02 oozie:launch
Expected output
application_1484661449412_1115434 papp mapreduce default 3 0 3 0 16G 0G 28 172 5.00 00:00:00 EdmHdpIf-SRI application_1484661449412_1115420 papp mapreduce default 2 0 2 0 12G 0G 86 545 95.00 00:00:00 oozie:launch application_1484661449412_1115433 eapp mapreduce eapp 2 0 2 0 12G 0G 23 160 5.00 00:00:00 oozie:launch application_1484661449412_1115386 eapp mapreduce eapp 2 0 2 0 12G 0G 250 1524 95.00 00:00:02 oozie:launch
Answer
Using grep, works best in this case:
1) yarn top | grep -A20 APPLICATIONID
A – Print data after matching string
20 – number of lines to be printed after (A) matching string
[gc13@oc1245342277 sh]$ cat text1
YARN top - 00:47:26, up 24d, 2:49, 0 active users, queue(s): root
NodeManager(s): 7 total, 7 active, 0 unhealthy, 0 decommissioned, 0 lost, 0 rebooted
Queue(s) Applications: 8 running, 111 submitted, 15 pending, 111 completed, 5 killed, 5 failed
Queue(s) Mem(GB): 100 available, 20 allocated, 0 pending, 0 reserved
Queue(s) VCores: 200 available, 2 allocated, 0 pending, 0 reserved
APPLICATIONID USER TYPE QUEUE #CONT #RCONT VCORES RVCORES MEM RMEM VCORESECS MEMSECS %PROGR TIME NAME
application_1484661449412_1115434 papp mapreduce default 3 0 3 0 16G 0G 28 172 5.00 00:00:00 EdmHdpIf-SRI
application_1484661449412_1115420 papp mapreduce default 2 0 2 0 12G 0G 86 545 95.00 00:00:00 oozie:launch
application_1484661449412_1115433 eapp mapreduce eapp 2 0 2 0 12G 0G 23 160 5.00 00:00:00 oozie:launch
application_1484661449412_1115386 eapp mapreduce eapp 2 0 2 0 12G 0G 250 1524 95.00 00:00:02 oozie:launch
[gc13@oc1245342277 sh]$
[gc13@oc1245342277 sh]$
[gc13@oc1245342277 sh]$
[gc13@oc1245342277 sh]$
[gc13@oc1245342277 sh]$ cat text1 | grep -A20 APPLICATIONID
APPLICATIONID USER TYPE QUEUE #CONT #RCONT VCORES RVCORES MEM RMEM VCORESECS MEMSECS %PROGR TIME NAME
application_1484661449412_1115434 papp mapreduce default 3 0 3 0 16G 0G 28 172 5.00 00:00:00 EdmHdpIf-SRI
application_1484661449412_1115420 papp mapreduce default 2 0 2 0 12G 0G 86 545 95.00 00:00:00 oozie:launch
application_1484661449412_1115433 eapp mapreduce eapp 2 0 2 0 12G 0G 23 160 5.00 00:00:00 oozie:launch
application_1484661449412_1115386 eapp mapreduce eapp 2 0 2 0 12G 0G 250 1524 95.00 00:00:02 oozie:launch
[gc13@oc1245342277 sh]$
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