We have run into an issue on several of of our Debian servers after upgradeing to Wheezy. The issue is one that tends to go unnoticed for a while, until you are looking through the files in ‘/var/log’ and notice that none of the files have updated entries since the date of the last upgrade.
The solution to the issue is to install the following package:
‘apt-get install inetutils-syslogd’
After installing this missing package, syslogd should once again be running, and you should start to see new entries show up in your messages, syslog, etc files.
Here are a few of the more helpful commands that I have been using recently to troubleshoot some performance issues we have been having with our our stacked S4820’s.
1)Show interfaces statistics:
‘show interface tengigabitethernet 0/40’
2)Monitor interface statistics in real-time:
‘monitor interface tengigabitethernet 0/40’
3)Show port channel statistics:
‘show interface port-channel7’
4)Show overview of port channel groupings:
‘show interface port-channel brief’
5)Monitor port channel statistics in real-time:
‘monitor interface port-channel 12’
6)Display vlan interfaces statistics:
‘show interface vlan 20’
7)Gather data for tech support:
8)Display serial numbers, service tags, etc:
I recently wanted to cleanup a few of the pools I have been using for rados benchmarking. I did not want to do delete the pools, just the objects inside the pool.
If you are trying to clear up ‘rados bench’ objects you can use something like this:
‘rados -p temp_pool cleanup –prefix benchmark’
If you are trying to remove all the objects from a pool that does not prefix the object names with:
****WARNING THIS WILL ERASE ALL OBJECTS IN YOUR POOL*****
‘for i in `rados -p temp_pool ls`; do echo $i; rados -p temp_pool rm $i; done’