Archive for the ‘Fishworks’ Category

Visualizing System Latency

I’ve just had an article published in ACMQ: Visualizing System Latency, which demonstrates latency analysis using heat maps in Analytics from Oracle’s Sun Open Storage appliances. These have revealed details about system performance that were previously not visible, and show how effective a simple visualization can be. As many of these details are new, they [...]

Posted on June 5, 2010 at 4:12 pm by Brendan Gregg · Permalink · Comments Closed
In: Fishworks · Tagged with: , , ,

iSCSI before and after

I’ve blogged many 7410 performance results for the NFSv3, NFSv4, and CIFS protocols. Now it’s iSCSI’s turn. When the Sun Storage 7000 series first launched, iSCSI was provided by a user-land process: iscsitgtd. While it worked, performance wasn’t as good as the kernel-based services such as NFS. iSCSI performance was to be improved by making [...]

Posted on January 27, 2010 at 2:12 pm by Brendan Gregg · Permalink · 2 Comments
In: Fishworks · Tagged with: , , ,

NFS Analytics example

I just tracked down a minor performance issue on my desktop in a couple of minutes, and thought it may make a good example to follow as it demonstrates using Analytics along with dtrace, truss, snoop and kstats – really the entire suite of perf tools I regularly use on Solaris. I was downloading a [...]

Posted on November 17, 2009 at 8:00 am by Brendan Gregg · Permalink · One Comment
In: Fishworks · Tagged with: , , ,