On 10/27/2011 05:52 PM, Casey wrote:
Ok, ok...you sold me on it. Time to re-install. 3rd time is a charm,
right? Now I just need to figure out my partition scheme for the array
using the QMT5-ISO install. Could someone give me a couple of
partitioning scheme recommendations for this back-end server I'm trying
to setup? Is 150MB still the size recommendation for one of the
unmounted partitions for DRBD?
I'm not so familiar with that. Do you mean 150G?
Should /boot be on its own partition?
I would. Grub has limitations that this works around, and lets you do
things with / that you can't do with /boot, such as using ext4 for example.
How big should I make the swap partition? I have 6gigs of RAM in this machine...
I don't use a swap partition any more. Use a swap file, which performs
just as well, and is more flexible. You can easily change the size of a
swap file to your needs, on the fly. No swap is best. I would create a
512M swap file (not partition) just as a safety net. Use "vm.swappiness
= 0" in /etc/sysctl.conf file to minimize swap use.
I'm opting to do the 5 drive RAID-10, using the 5th as a hotspare. Just
need a little guidance, so I can set this thing up the right way from
the beginning of it all.
I'd set up all drives with 3 raid partitions:
100M for md0, raid-1, 4 active one hot, /boot
8G for md1, raid-1, 4 active one hot, /
remainder md2, raid-10, 4 active one hot, /mnt/stor (or whatever you
like to call your storage area).
With anaconda, you should create the raid partitions on all drives first
(3 raid partitions, the same on each drive), then create each raid array
using one partition from each drive. You'll want the hot spare partition
of each array to be on the same drive, but I'm not sure if anaconda lets
you do this or not. If anaconda can't handle the configuration you want
(it won't for example let you create a degraded array), you'll need to
create the partitions and arrays manually first, then install the os.
That's all I have right now. Let us know how you progress.
--
-Eric 'shubes'
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