this should be probably a already asked question but highly appreciate if someone can guide me on this
i have a business critical linux system (which is running a SMS system) where one of it's partition size is shrinking
i want to know the possible options of increasing the size of that partition without having any downtime(system reboot etc..).
fdisk and df -h outputs are as below (the partition with issue is bases)
please help on this since i don't think i can manage this partition for long period
thanks
Asela
---------- Post updated 01-24-11 at 12:08 AM ---------- Previous update was 01-23-11 at 11:57 PM ----------
i have heard about LVM but don't know can use same regarding this case(without rebooting and with out losing any data)
Last edited by Scott; 01-23-2011 at 02:39 PM..
Reason: Use code tags, please...
In general, there are few cases where a filesystem can be changed without any downtime (although it's possible to keep it in the minutes range).
The problem with your setup is that the disk is already completely used up. You might get away with re-allocating 1 GB from the root partition, but that would mean downtime as the restructuring would have to be done mostly from a Live-CD.
Create a new partition same size as the old one.
Copy contents to it.
umount the old one, mount the new one... (a few seconds downtime)... will have to bounce services.
Expand the old partition:
fdisk /dev/cciss/c0d0
d
u
u
p
n
p
1,2,3,4???
start
end
w
q
resize2fs /dev/cciss/c0d0p9
fsck.ext3 -f /dev/cciss/c0d0p9
Then umount the new partition, and mount the expanded old one. (a few secs and service reboots again).
What would be so much more easy, is if you can provision a new partition then just mount it in the same location, however, your device path will have to change. (if that matters)
On the other hand, if you want to change things "live" live, then you will need something like zfs
Could you please confirm that LVM is configured on your server or not?
lvmdisplay/vgdisplay commands.
I hope you are pointing to :
/dev/cciss/c0d0p9 29G 26G 971M 97% /bases so is it from the Local Disk or coming from the SAN?
Solutions might be:
1. If connected to SAN, then LUN can be extended from SAN & can be resized on OS level.
2. If not connected to SAN, having local Disk then LVM must be configured and your current local disk must have space to attach another PV to the current VG to extend this filesystem.
Another issue that I see is that you seem to have multiple swap partitions on the same disk. Why are you doing this? Do you actually use that much swap? How much memory do you have in this system? What is the output of the following command:
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