Raid-Z in VMWare

Posted by Doomshammer on Saturday, September 1. 2007 at 16:27 in Anwendungen, Computer, English only, Privat

I finally had some time for playing with Solaris again - especially with ZFS. As I don't want to have another box standing in my living room and making noise, I decided to use a VMWare for playing instead. So I set up a VMWare with 11 hard drives and installed Solaris 10 11/06. Installation went smooth as usual.

First task was to set up a two-way UFS mirror between the first two disks, so that I have a failover when the first disk breaks (of cours, in a vmware this is stupid, as these are only vritual devices - but who cares... it's just for fun :-) ). While creating the mirror, I ran into slight troubles caused by the virtual drives of VMWare. As I didn't choose to allocate the whole disk space during the setup, the disks weren't really touched when I mirrored the partition table with prtvtoc/fmthard. So the created metadb was lost after reboot and caused a OS panic. Deleting the metadb on the 2nd (not yet allocated disk) solved the panic. So I created a filesystem on the 2nd disk, so that disc space got allocated. This finally helped to resolve the metadb/metainit problem.

After that I created a Raid-Z to see how it performs within a VMWare - and though these are virtual drives, it performs like hell. All disk access is nicely striped over all 9 discs in the pool. Putting full I/O on the pool gave me this performance results:

QUOTE:

                capacity     operations    bandwidth
pool          used  avail   read  write   read  write
-----------  -----  -----  -----  -----  -----  -----
pool1         483M  35.3G      0  1.77K      0   219M
  raidz1      483M  35.3G      0  1.77K      0   219M
    c1t2d0       -      -      0    385      0  27.4M
    c1t3d0       -      -      0    387      0  27.4M
    c1t4d0       -      -      0    388      0  27.4M
    c1t5d0       -      -      0    389      0  27.4M
    c1t6d0       -      -      0    388      0  27.4M
    c1t8d0       -      -      0    386      0  27.4M
    c1t9d0       -      -      0    387      0  27.4M
    c1t10d0      -      -      0    386      0  27.4M
    c1t11d0      -      -      0    387      0  27.4M
-----------  -----  -----  -----  -----  -----  -----


I think these are very good results. Going to play a bit more now :-)

Nerdish dreaming

Posted by Doomshammer on Wednesday, August 1. 2007 at 13:28 in English only, Fun, Privat, Thoughts

What's the difference between the dreams of a "usual" person and a nerd? Well... Let me tell you s.th. about the dream I dreamt last night ;-)

The dream was mainly about a girl which I had a crush on, when I was in the 9th or 10th grade - which is strange enough, as this was approx. 12 or 13 years ago ;-) but maybe that's because I "found" her on this StayFriends thingy a week ago.

Anyhow... In my dream I met her somewhere (don't remember) and she invited me to her house - which isn't very unusual. But here comes the "nerdish" part of the dream... In my dream she had 12 dogs - but not usual dogs. She had so called VMWare dogs *g*. And the even more nerdish part is, that she explaind how this VMWare dogs work.

A VMWare dog is a standard organic dog body just w/o a brain. The brain has been replaced by a chip with a VMWare on it. This VMWare holds an A.I. which let the dog act like a real dog. And the great thing is, that this VMWare can be shutdown by a button at the body of the dog. So when you have to go to work, just shutdown your VMWare dog and everything is fine ;-)

So, is this a nerdish dream?! When I woke up this morning and went to the bathroom, I remembered of the dream and started laughing w/o end ;-)

Bluescreen unter Linux

Posted by Doomshammer on Tuesday, March 29. 2005 at 15:28 in Anwendungen, Linux/Unix, Privat

Jaja.. und wieder ein Beweis, dass Windows nichts taugt, selbst wenn es unter Linux laeuft ;-)


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