Why ext3 needs to go the way of the dodo …

root@pegasus-i:~# mdadm –create /dev/md0 –level=0 –raid-devices=2 /dev/sdc /dev/sdd mdadm: array /dev/md0 started. root@pegasus-i:~# cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md0 : active raid0 sdd[1] sdc[0] 9765425152 blocks root@pegasus-i:~# mkfs.ext3 /dev/md0 mke2fs 1.40.2 (12-Jul-2007) mkfs.ext3: Filesystem too large. No more than 2**31-1 blocks (8TB using a blocksize of 4k) are … Read moreWhy ext3 needs to go the way of the dodo …

LNXI (Linux Networx) is done

SGI acquired the assets yesterday.
Sad, LNXI was one of the good ones. Like us, a real HPC shop. They got killed (my guess) by going after huge government systems with long drawn out acceptance tests. Which killed their cash flow, and put them into an unsafe business area.
Look, HPC is just like any other business, you have to be able to distinguish good business from bad business. Some business you cannot afford to pursue, the cost of winning is simply too high. Call that business, Pyrrhic business. The wins come at such a huge cost to you, that losing would have been simply better for your business.

Read moreLNXI (Linux Networx) is done

In order to block spam, we are now rejecting all mail from isp.att.net

I hope someone from isp.att.net reads this. I have sent email to abuse@att.net, to spam@att.net, and so on. I have filled out the necessary forms on their website. Yet, sadly, no response from them. So I have taken the minimal of draconian measures. I put a simple rule in our mailer to automatically reject connections … Read moreIn order to block spam, we are now rejecting all mail from isp.att.net

Looks like Novell will get paid after all

A company apparently has demonstrated the validity of a P.T. Barnum quote .
SCO is going private.
PJ at Groklaw has a note on this.
So after this is over and SCO goes private, Novell ought to get its appropriate share of the about $50M or so of license revenue that SCO owes it … right?
Which leaves about $50M for the IBM lawyers to go after.
Maybe the title should have been “night of the living dead“.

Read moreLooks like Novell will get paid after all

Not bad: 1.3 GB/s on reads

root@jr1:~# ./simple-w3.bash
+ sync
+ echo -n 'start at '
start at + date
Thu Feb 14 13:33:03 EST 2008
+ dd if=/dev/zero of=/big/local.file.5962 bs=8388608 count=10000 oflag=direct
10000+0 records in
10000+0 records out
83886080000 bytes (84 GB) copied, 68.8322 seconds, 1.2 GB/s
+ sync
+ echo -n 'stop at '
stop at + date
Thu Feb 14 13:34:12 EST 2008
root@jr1:~# ./simple-w
root@jr1:~# mv /big/local.file.5962 /big/local.file
root@jr1:~# ./simple-read.bash
+ sync
+ echo -n 'start at '
start at + date
Thu Feb 14 13:34:32 EST 2008
+ dd if=/big/local.file of=/dev/null bs=8388608 iflag=direct
10000+0 records in
10000+0 records out
83886080000 bytes (84 GB) copied, 66.5795 seconds, 1.3 GB/s
+ sync
+ echo -n 'stop at '
stop at + date
Thu Feb 14 13:35:39 EST 2008

Read moreNot bad: 1.3 GB/s on reads