Controversy in the kernel

Referring to this article, it appears that there is some issue with an important subsystem in the Linux kernel. The SCSI target code, specifically the new implementation pulled in by James Bottomley is the LIO framework based upon work of Nicolas Bellinger and Rising Tide Systems. This was chosen over the SCST implementation, which continues … Read moreControversy in the kernel

SC12 panel on big data

Listen to their definition between 3 and 6 minutes in. The storage performance and IO performance, and networking is extraordinarily critical to these problems. Which has been the set of problems we’ve been focusing on for a long time. Also worth noting that Addison Snell nails it on HPC and big data relationships. They are … Read moreSC12 panel on big data

And its over till SC13 …

Upfront: This was the best SC conference we have ever participated in. From an interest level, traffic level, and various meetings with partners, customers, and others. And to the folks who might be reading this whom we missed, or had to cut short conversations due to timing, please feel free to call/email us. We are … Read moreAnd its over till SC13 …

SC12 day 1

Ok, beobash rocked. As usual, Lara at Xandmarketing, Doug Eadline did an absolutely awesome job. For those I bumped into, hello again. I apologize if I didn’t spend more time with you … especially my readers … I was operating on fumes at that point. Please don’t hesitate to introduce yourself during the day at … Read moreSC12 day 1

On the test track: New JackRabbit, open the throttle wide …

I know, I know, I really should wait until the drive build is done. I know I should do that.
[root@Mj?lnir ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/md0 89G 6.8G 77G 9% /
tmpfs 127G 0 127G 0% /dev/shm
/dev/sdc 48T 393G 47T 1% /data/3
/dev/sdb 48T 395G 47T 1% /data/2
/dev/sdd 33T 367G 33T 2% /data/4
/dev/sda 48T 374G 47T 1% /data/1
I called it Mj?lnir, as I liked this quote:

Mj?lnir is depicted in Norse mythology as one of the most fearsome weapons, capable of leveling mountains.

(or as I like to think of it)
… of data.
But I gotta know. How fast can this system run?
Start up our 1TB write. This is simply streaming 1TB of data out to the drives. Thats it. Only a file system. Simple stream. Uncached. So this is really … really streaming.
And its being burdened by the volume build. So we aren’t at maximum speed.
Light up fio with our test, and …
… start up dstat in another window, give it some time, and then …

Read moreOn the test track: New JackRabbit, open the throttle wide …