Netware System / TSA Performance Tuning

Tuning possibilites for tsafs should be applied in the order listed.

System: (double the ram)

• Make sure to use 2GB or more ram
• Disable HT in bios

Storage: (double the storage speed)

• Confirm that Adaptive read-ahead is turned off on the raid controller.

Only turn on WB caching if all of the following items are true:

• System has dual physically independent power supplies
• System has a ups configured for auto-shutdown
• Power supplies hooked up to different power sources
• System has battery backed raid controller
• Raid battery has full voltage

Network: (double the network speed)

• Enable load sharing with load balancing and confirm with interface statistics that it is actually working. 
• The tx and rx of each nic included in the team should be similar. 
• Switch port utilization should be similar/within about 30%. 

90% possible performance should be reached by this point!

TSAs: (double the software caching sizes and threads )

### This configuration expects 4GB of ram and at least 2 cores and hardware raid. this also won't make much if any difference unless at least 3 of the above configurations are already complete.

# Modifying these values could lead to an out of memory ABEND or other failure, please only modify these configurations as a last resort or when you have lots of very small files  or groupwise or backup performance under 80GB/h.

Custom configuration of tsafs:

cachememorythreshold=20
readaheadthrottle=8
readbuffersize=65536
#shouldn't help much unless mean file size is >1MB, which is unlikely.
#readbuffersize=131072
readthreadallocation=25
readthreadsperjob=16
cachingmode=enable