Hi all,

I wanted to upgrade my system to amd64 and used that opportunity to
install 2 240GB (1GB = 1000MB etc. unfortunately) SSDs on my rig.

The partition map is below:
NAME                      MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda                         8:0    0 223.6G  0 disk
├─sda1                      8:1    0   186M  0 part /boot
├─sda2                      8:2    0     1K  0 part
└─sda5                      8:5    0 223.4G  0 part
  ├─gp01-root (dm-0)      254:0    0   1.9G  0 lvm  /
  ├─gp01-swap (dm-1)      254:1    0   1.9G  0 lvm  [SWAP]
  ├─gp01-usr (dm-10)      254:10   0  23.9G  0 lvm  /usr
  ├─gp01-tmp (dm-11)      254:11   0   4.8G  0 lvm  /tmp
  ├─gp01-var (dm-12)      254:12   0   4.8G  0 lvm  /var
  └─gp01-home (dm-13)     254:13   0 186.2G  0 lvm  /home
sdb                         8:32   0 223.6G  0 disk
└─sdb1                      8:33   0 223.6G  0 part
  └─gp02-virtual (dm-2)   254:2    0 143.1G  0 lvm  /virtual

so there are two LVM volume groups with the first one on sda hosting the
OS and second on sdb using 1 partition for my VMs.

I have done the following for optimization (ref:
https://wiki.debian.org/SSDOptimization?action=show&redirect=SSDoptimization):

1) Kernel: Linux localhost 3.14-1-amd64 #1 SMP Debian 3.14.9-1
(2014-06-30) x86_64 GNU/Linux

2) Updated the firmware for the Intel 530  240GB disk

3) I have not gone into partition alignment for two reasons: 1) the
article on debian wiki refers to is from a long time ago, 2) blockdev
doesn't indicate misalignment (see below):
$> sudo blockdev --getalignoff /dev/sda1
0
$> sudo blockdev --getalignoff /dev/sda2
0
$> sudo blockdev --getalignoff /dev/sda5
0

4) For mounting file systems, I have added discard in /etc/fstab and
also enabled issue_discards in lvm.conf

5) Enabled deadline scheduler using udev rules as I intend to have two
HDDs reconnected.

6) Added vm.swappiness as kernel option in /etc/sysctl.d/local.conf

What I want to know at this point is:
Is there anything else that is recommended?
The section on RAMDISK options on tmpfs, does that help?
Lastly, the partition alignment discussion on
http://tytso.livejournal.com/2009/02/20/ is from 2009 - is it relevant
today?
Are any of the above "modifications" really necessary?

Thanks,
Kamal


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