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=== Prepare and format partitions ===
== ''Make sure postgres is not running'' ==
==== Prostgres DB disk ====
Run the following lines
<pre>
dev=/dev/cciss/c0..."
2015-08-26T12:28:57Z
<p>Created page with "
=== Prepare and format partitions ===
== ''Make sure postgres is not running'' ==
==== Prostgres DB disk ====
Run the following lines
<pre>
dev=/dev/cciss/c0..."</p>
<p><b>New page</b></p><div><br />
<br />
=== Prepare and format partitions ===<br />
<br />
<br />
== ''Make sure postgres is not running'' ==<br />
<br />
<br />
==== Prostgres DB disk ====<br />
<br />
Run the following lines<br />
<pre><br />
dev=/dev/cciss/c0d1<br />
dd if=/dev/zero of=$dev bs=1M count=1<br />
/sbin/parted $dev mklabel gpt<br />
end_in_MB=<tt>/sbin/parted $dev unit MB print |sed -nr '{ s#Disk[[:space:]]+/dev/cciss/c0d1+:[[:space:]]([0-9]+)MB#\1#p }'</tt><br />
/sbin/parted $dev mkpart xfs 1 $end_in_MB<br />
<br />
dev=/dev/cciss/c0d1p1<br />
sunit=256<br />
data_disks=2<br />
swidth=$(($sunit*$data_disks))<br />
/sbin/mkfs.xfs -d sunit=$sunit,swidth=$swidth $dev<br />
</pre><br />
<br />
<br />
==== xlog disk ====<br />
*With fdisk do <br />
<pre><br />
fdisk /dev/cciss/c0d2<br />
</pre><br />
*Press n to create a new partition and just accept the default values for beginning and end of the disk<br />
*Press w to write and wait till it is done<br />
*format the partition with ext2<br />
<pre><br />
mkfs.ext2 /dev/cciss/c0d2p1<br />
</pre><br />
<br />
=== Edit <tt>/etc/fstab</tt> ===<br />
<br />
Make sure /etc/fstab looks likes that<br />
<br />
<pre><br />
[root@dcache3-shadow ~]# cat /etc/fstab <br />
LABEL=/ / ext3 defaults 1 1<br />
/dev/vg.01/usrvol /usr ext3 defaults 1 2<br />
/dev/vg.01/optvol /opt ext3 defaults 1 2<br />
/dev/vg.01/zvarvol /var ext3 defaults 1 2<br />
/dev/vg.01/tmpvol /tmp ext3 defaults 1 2<br />
LABEL=/boot /boot ext2 defaults 1 2<br />
/dev/cciss/c0d2p1 /xlog ext2 defaults,noatime 1 2<br />
tmpfs /dev/shm tmpfs defaults 0 0<br />
devpts /dev/pts devpts gid=5,mode=620 0 0<br />
sysfs /sys sysfs defaults 0 0<br />
proc /proc proc defaults 0 0<br />
/dev/cciss/c0d0p3 swap swap defaults 0 0<br />
/dev/cciss/c0d1p1 /var/lib/pgsql xfs defaults 0 0<br />
</pre><br />
<br />
'''Notice lines beginning with <tt>/dev/cciss/c0d1p1</tt> with xfs and <tt>/dev/cciss/c0d2p1</tt> with ext2'''<br />
<br />
=== Prepare the mounting step ===<br />
<br />
*backup /var/lib/pgsql <br />
<pre><br />
mkdir /root/backup-pgsql<br />
mv /var/lib/pgsql /root/backup-pgsql<br />
</pre><br />
<br />
*create the mount point for xlog<br />
<pre><br />
mkdir /xlog<br />
</pre><br />
<br />
<br />
=== Mount and symlinks ===<br />
<br />
*Mount all new partitions:<br />
<pre><br />
mkdir /var/lib/pgsql<br />
mount -a<br />
</pre><br />
<br />
*put back the backup files<br />
<pre><br />
mv /root/backup-pgsql/pgsql/* /var/lib/pgsql/<br />
chown -R postgres.postgres /var/lib/pgsql/<br />
</pre><br />
<br />
*Make a symlink to the new special location for xlog<br />
<pre><br />
cd /var/lib/pgsql/data/<br />
mv pg_xlog /xlog/pg_xlog<br />
ln -s /xlog/pg_xlog pg_xlog<br />
</pre><br />
<br />
<br />
<br />
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