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I increased the size of the storage array on my desktop machine at home to ~2TB last night, by adding two more 500GB spindles. Growing the LVM-based file system ( /archive) on that array was incredibly easy: just add the new physical volumes to the volume group, grow the logical volume, and then grow the file system. The RAID-1 file system ( /backups) was a little more interesting; I decided to convert it to a RAID-10 device, so I had to back it up to another file system, unmount it, destroy the old RAID group, create a new RAID group, make a file system onto the new RAID group, mount the new file system, and then restore the contents of the file system from the backup. Here's the new config: /dev/mapper/archive_vg-lv0 on /archive type xfs (rw)
/dev/md0 on /backups type ext3 (rw)
/dev/mapper/archive_vg-lv0
1.4T 157G 1.2T 12% /archive
/dev/md0 199G 54G 135G 29% /backupsAnd the performance using bonnie++ -s 4g -f -n 0: Version 1.03c ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Filesystem Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
lvm/xfs 4G 93832 56 53297 30 125648 41 247.5 1
raid10/ext3 4G 84414 65 38778 27 98578 32 463.1 3Surprisingly, the block write performance on the LVM based file system is about 30% worse than before. I don't quite understand that yet... Tags: geek, storage
Current Mood: accomplished
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If you haven't seen the trailer for the Tim Burton produced animated film 9, you need to do so post-haste. It looks flippin' sweet. (BTW, the song underneath the trailer is "Welcome Home" by Coheed and Cambria. It's probably the best "new" song I've heard in over a year -- which should tell you about how often I listen to the radio, since it was released in 2005...) In other news, I'm hoping that the sale of my condo closes next Friday. However, the demons of stupidity seem to be conspiring against me, so we'll see if it actually happens or not... Tags: movies, moving sucks, music
Current Mood:  excited
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I was Googling for the phrase "My other computer is a Cray" today (because it is, and therefore my laptop needs a sticker to that effect), and the number 2 hit is a blog entry from somebody at Microsoft Research from last year's Supercomputing conference complaining that Microsoft had been "shut out" from the Gordon Bell Prize competition. It's not entirely clear to me that the author understands how the Gordon Bell Prize works. Most of the entries last year were on either LANL's Roadrunner (the #1 machine on the last Top 500 list) or ORNL's Jaguar (the #2 machine on the last Top 500 list), and virtually all of the entries had higher sustained performance than the peak of the most powerful Windows HPC system in existence. So, unless somebody at Microsoft Research is willing to "soil their hands" publicly by working on a Linux/UNIX-based supercomputer (which Roadrunner, Jaguar, and 493 other machines on the last Top 500 list are), I don't see how they could be competitive for the Gordon Bell Prize... In other news, my parents have been in town for the last couple days for Mother's Day. That's been pretty good... except for the part where their car's passenger window got stuck in the down position, which resulted in my dad and I attacking a sheet of plexiglass with a Dremel to fab a temporary patch so they can drive back to Ohio tomorrow. In other other news, I'll be in Columbus from next Saturday (5/16) till the following Sunday (5/24). I'll be at the DICE Alliance conference on the 19th and 20th and probably at OSC on the 21st, but other than those, my schedule is currently wide open for those days. If you're in the Columbus area and want to hang out while I'm up there, let me know. Tags: family, work
Current Mood:  sleepy
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