Tuning Virtual Ethernet adapters for (even) better backup performance.
Are you backing up your AIX systems
over Virtual Ethernet adapters? Of course you are, who isn’t right? Are your
backup server and clients on the same physical POWER system? You are most
likely backing up over Virtual Ethernet to another AIX LPAR that is running
your enterprise backup software, such as TSM or Legato Networker for example.
And you probably have a dedicated private virtual network (and adapters) on
both the clients and the server to handle the traffic for the nightly backups.
The next question is, have you tuned your... [More]
Tags:  min_buf_huge=96 backup netstat slow hypervisor -a aix max_buf_huge=128 tsm chris_gibson min_buf_large=96 max_buf_large=256 networker min_buf_medium=512 -l adapter max_buf_medium=1024 virtual ent1 chdev –a ethernet |
Checking num_cmd_elems for VFC adapters with kdb
This entry is
similar in theme to one of my previous posts about verifying your hdisk queue_depth settings with kdb . This time we want to check if an attribute for a Virtual FC (VFC)
adapter has been modified and whether or not AIX has been restarted since the
change. The attribute I’m interested in is num_cmd_elems .
This value is often changed from its default settings, in AIX environments, to improve
I/O performance on SAN attached storage. From
kdb you can identify the VFC
adapters configured on an AIX system using the vfcs... [More]
Tags:  odm -p kdb lsattr chris_gibson num_cmd_elems adapter vfcs aix chdev reboot vfc |