Hi;
Here's my question:
I have 3x9gb UW SCSI and a 2gb Narrow SCSI drives. My plan is to
install the '/','/usr' and (120mb) swap partitions on the 2gb drive, and
create a RAID5 array of the 9gb disks for important data.
Since I want to install '/var', '/home', '/usr/local' and '/tmp'
on the raid5 array, I am wondering how the best way to do it is.
Here is what I envision:
Partition each 9gb disk as follows;
partition #1 p#2 p#3 p#4
/dev/sdb 1150 500 500 6400
/dev/sdc 1150 500 500 6400
/dev/sdd 1150 500 500 6400
Create RAID arrays as follows;
/dev/md0 sdb1,sdc1,sdd1 @ RAID5 = ~2300mb (for /var)
/dev/md1 sdb2,sdc2,sdd2 @ RAID5 = ~1000mb (for /tmp)
/dev/md2 sdb3,sdc3,sdd3 @ RAID5 = ~1500mb (for /usr/local)
/dev/md3 sdb4,sdc4,sdd4 @ RAID5 = ~12.8 GB (for /home)
My main motivation in making multiple raid partitions is to ensure
that diskusage by one process (eg: sendmail) doesn't fill the entire disk.
Main Question:
1) Will the raid5d kernel process(s) consume more system resources
(RAM/CPU) if I make 3 raid5 partitons instead of one? I noticed that if I
do create all 4 partitions, there is a raid5d and raid5syncd process for
each raid device (makes sense to me).
Cheers
Chris
