[CentOS] RAID help

On 14.12.2010 22:49, Jason T. Slack-Moehrle wrote:
> Hi,
> 
>> If you dont know in advance how your storage is allocated the best way,
>> use lvm. The space you dont need today is in the pool and be it
>> /var/www/html or swap or whatever assign it as needed in the future.
>>
>> Note that its maybe better to not put /boot into lvm.
>>
>> I would suggest
>>
>> /dev/md0 -> /boot
>> /dev/md1 -> lvm with all other partitions including swap
> 
> OK, I have done this, I need to create mount points and I am not sure how to initially size.

My idea was to assign minimum at now. It could go like this:

lvm volume group -> 1000GB

for the system:
lvm logical volume for / -> 1GB
lvm logical volume for /var -> 1GB
lvm logical volume for /usr -> 1GB

lvm logical volume for /var/www/html -> 50GB

Now you have assigned 53GB out of the 1000 and the other 947GB remains
dynamically assignable from the lvm volume group.

If you need more space in one of the partitions, just grow it, out of
the pool of 947GB. Logical Volumes can be resized online and many
filesystems can be grown online (mounted) too. If the initial 1GB for
some partition proves to be to low, e.g. it has to be increased on every
server you have than adjust it to initial 2GB or whatever size is
adequat for you. I am not after numbers at all. My point is: If you dont
know how to partition, assign at minimum, allowing for future flexibility.

-- 
Best Regards,
Markus

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 267 bytes
Desc: OpenPGP digital signature
URL: <http://lists.centos.org/pipermail/centos/attachments/20101214/e130a649/attachment-0001.sig>