Location of the /var folder ?

newbie14 · 07-30-2015, 08:34 PM

A new centos 6.6 is installed. When I do a df-h I get the following. My worry now should I reinstall to create a separate /var or leave it where it will be enough? Where will the /var be in the / or /home ?

Code:

Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/vg_tt-lv_root
                      219G 1009M  207G   1% /
tmpfs                 7.7G     0  7.7G   0% /dev/shm
/dev/sda2             477M   47M  405M  11% /boot
/dev/sda1             200M  260K  200M   1% /boot/efi
/dev/mapper/vg_tt-lv_home
                       48G   52M   46G   1% /home

rokytnji · 07-30-2015, 08:43 PM

/var in my experience is usually in root / , not home

Code:

$ cd /
 / $ ls
bin    dev   initrd.img      lib64       mnt   root  srv  usr      vmlinuz.old
boot   etc   initrd.img.old  lost+found  opt   run   sys  var
cdrom  home  lib             media       proc  sbin  tmp  vmlinuz

Code:

$ df -h --total
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda6        18G  8.9G  7.6G  55% /
none            4.0K     0  4.0K   0% /sys/fs/cgroup
udev            1.9G  4.0K  1.9G   1% /dev
tmpfs           389M  1.3M  388M   1% /run
none            5.0M     0  5.0M   0% /run/lock
none            1.9G   88K  1.9G   1% /run/shm
none            100M   28K  100M   1% /run/user
/dev/sda5       160G   76G   77G  50% /home
total           182G   85G   89G  49% -

Your root at 200 + gig is more than enough room for /var.

newbie14 · 07-30-2015, 08:51 PM

Hi Rokytnji,
So is this setup ok or should I reinstall it ? My worry is the mysql may grow beyond var default size of 50G ?

jmgibson1981 · 07-30-2015, 10:54 PM

I would redo the partition structure and make root only 10 or 15 gigs. then create a data partition and link stuff into the proper place. this has the advantage of keeping stuff separate should a reinstall be required for whatever reason. In your case

Code:

/ @ 15gb
/boot @ 512mb
/data @ 230gb

Adjust for LVM of course.

Cebrian · 07-31-2015, 02:38 AM

You can create a new lv or partition and mount it under /var.If you want dedicated storage for MySQL or MariaDB you should mount it under /var/lib/mysql/

newbie14 · 08-01-2015, 11:03 PM

Hi All,
If it is not separated into different partition will it be any issue ? When there is a reinstall how its come to help I am not so clear ?

Cebrian · 08-02-2015, 11:06 AM

Quote:

Originally Posted by newbie14

Hi All,
If it is not separated into different partition will it be any issue ? When there is a reinstall how its come to help I am not so clear ?

You will get interesting features if you use LVM like FS Snapshots, online resizing, and so on..

In my opinion is better to have one LV dedicated to database storage.

If your system was not installed with LVM I recommend you to reinstall it with LVM support.

John VV · 08-02-2015, 02:39 PM

normally "var" is on / ( /var )

but if you are going to be having a HUGE database there
you might want to place /var on it's OWN harddrive

my install of SL 6.6
( not using LVM and,sharing it with a second OS )
/boot -- 200 meg
/ -- 200 gig
/home -- 32 gig

rokytnji · 08-02-2015, 03:25 PM

Quote:

you might want to place /var on it's OWN harddrive

symlinking it to a var folder in /, No?

Placing var on another hard drive, or another partition, still requires symlink to root so logs being sent to / make it to the other var folder on another partition or another hard drive.

I run beta testing releases myself and all /home and / stuff I wish to keep goes on another partition and gets symlinked back to their respective spots in the linux file structure. I am lazy so I use rox file manager instead of command line for drag and drop symlinking. I'll like delete the var folder in /. Make a new one like for example /dev/sdb/var.

Then drag and drop /dev/sdb/var and pick relative from the menu. Instead of absolute.

If afeared newbie14. Reinstall with all the good suggestions I marked as helpful in this thread.

newbie14 · 08-23-2015, 10:49 PM

Hi Rokynji,
Initially you mentioned Your root at 200 + gig is more than enough room for /var. So can I leave it as it is ? I dont think my db will go up to 50 Gb even cause we will delete data we go.

timsoft · 08-27-2015, 05:39 AM

yes. you can leave it as is, just be aware of the other comments made.
Having /var on a different partition can make it easier when upgrading your OS, but if you follow normal good practice of backing things up first, it shouldn't matter.

keeping it simple is useful, and if some time in the future your database gets so big it won't fit on the partition, add a second larger hard drive, and move everything in /var over to it, then just mount the new drive partition on /var