rmdef takes a very long time to remove objects in xCAT DB when the DB is populated, nodeset offline is cause #2508
Description
Creating some dummy entries into xCAT, created 1000 node definitions very quickly...
[root@fs1 research92]# time mkdef c460c[0001-1000] groups=regEX_CORAL
1000 object definitions have been created or modified.
real 0m2.506s
user 0m0.256s
sys 0m0.005s
Removing it was another story. I tried to first use a wildcard noderange, and I thought xCAT hung and killed it....
root 616 142804 0 11:48 ? 00:00:00 \_ sshd: root@pts/5
root 626 616 0 11:48 pts/5 00:00:00 | \_ -bash
root 2913 626 0 12:00 pts/5 00:00:00 | \_ /usr/bin/perl /opt/xcat/bin/rmdef /c460c.*
[root@fs1 research92]# time rmdef /c460c.*
Killed
real 53m27.144s
user 0m0.385s
sys 0m0.021s
I think after the investigation, it's probably just that it was going to take a very long time to remove the definitions. DB is Postgres
Here's some investigation data....
[root@fs1 ~]# time rmdef c460c[0001-0010]
10 object definitions have been removed.
real 0m54.834s
user 0m0.256s
sys 0m0.015s
[root@fs1 ~]# time rmdef c460c[0011-0030]
20 object definitions have been removed.
real 1m48.741s
user 0m0.267s
sys 0m0.005s
Removing blocks of 100 (surprising after the first 100 was removed, the time actually increased...
[root@fs1 ~]# time rmdef c460c[0061-0160]
100 object definitions have been removed.
real 20m38.523s
user 0m0.313s
sys 0m0.014s
[root@fs1 ~]# time rmdef c460c[0161-0260]
100 object definitions have been removed.
real 34m36.380s
user 0m0.349s
sys 0m0.037s
[root@fs1 ~]# time rmdef c460c[0261-0360]
100 object definitions have been removed.
real 34m34.777s
user 0m0.374s
sys 0m0.005s
The good thing here is that noderm works a lot faster but it has an entry being printed out for each node removed. (Should consider making the output less verbose..)
[root@fs1 ~]# time mkdef c460c[0001-1000] groups="regEX_CORAL"
1000 object definitions have been created or modified.
real 0m2.508s
user 0m0.247s
sys 0m0.015s
[root@fs1 ~]# time noderm c460c[0001-1000] >> /dev/null
real 0m24.958s
user 0m0.159s
sys 0m0.013s