Tag archives for Dtrace
Hi, last year was a busy one, but just because we worked in really cool projects and was very, very exciting!
I should be at Las Vegas from May 05-09, and in Santa Clara from Jun 10-12. In Santa Clara I will be presenting one of the solutions we developed last ...
That was a simple but nice one... i did see a huge write performance on one of our storages.
Take a look at this slog device (SSD):
r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b device
0.0 10494.5 ...
Maybe if i could understand the Oracle's mind, i could learn how to make money. I think that is the key in this whole Oracle/Sun situation:
Java, Dtrace 1, 2, 3, 4, and ZFS creators did leave the company.
Why someone would buy a technology company, with so many ...
DO NOT TRY IT IN PRODUCTION. USE AT YOUR OWN RISK!
Good news... here you can get a little script to enable, disable, and check the disksort flag on your disks (not persistent after reboot, take a look on my other post to a link for how to do it).
Take ...
DO NOT TRY IT IN PRODUCTION. USE AT YOUR OWN RISK!
In my last post i did write about some issues related with disksort:
1) Performance (Latency)
2) Consistency
In my D Script i'm printing the buf sector when the sd driver receives it. So, without sorting.
That's important because i'm ...
Hello there, this will be a long post... so, i think if you have no time to waste, think again before you go ahead.
And, no. I'm not Morpheus, so i cannot offer you the truth. Actually, i can just offer you my doubts. And no pills, i do ...
In my last post about 'Performance', i did talk about a ZFS tuning parameter: zfs_prefetch_disable. And that was a ZFS read parameter...
In this post, we will take a look in another one, with the same 'water to wine' effect. This time with focus on writes...
We have a set ...
Ok, now i did some 'clean up' on the code... did create some functions, have removed duplicated code, and add new features like 'Requests per second'. Now i think is just fix any bugs that we will find, but the features for this particular tool are done.
Take a look:
FEATURES:
...
I need more eyes on the code... ;-)
I did a few more changes, but i'm not a C programmer. I did add two graphs (clean up the screen with curses is boring, thanks for some procedures from iMil and the great wimon software).
With that graphs (Read and Write), we ...
DO NOT TRY IT IN PRODUCTION. USE AT YOUR OWN RISK!
Hello there! Yesterday i was coding a simple tool to provide a better visualization of the block's sizes (read/write) on a NFS server. The primary objective was not consolidate informations, but just quickly visualize trends, for a short period of ...