Re: [PLUG] SSD & HDD Partition Plan Suggestions

["Gavin W. Burris" <bug@sas.upenn.edu>]

Some other things to try with an SSD.  I put these in the /etc/rc.local
file.

echo noop > /sys/block/sda/queue/scheduler
echo 0 > /proc/sys/vm/swappiness
echo 50 > /proc/sys/vm/vfs_cache_pressure
echo 1500 > /proc/sys/vm/dirty_writeback_centisecs
echo 20 > /proc/sys/vm/dirty_ratio
echo 10 > /proc/sys/vm/dirty_background_ratio


On 10/20/2011 08:30 AM, Gavin W. Burris wrote:
> Hi Casey,
> 
> My main computer is a netbook with a Corsair SSD, hooked to an external
> LCD when at a desk.  I would suggest putting your home directory on the
> SSD, also.  If you have enough memory, most of the OS will be cached in
> memory anyway, but your home directory files will be constantly read and
> re-written for your interactive applicatons.
> 
> There are tricks to mounting various temp and cache directories into
> RAM, too, like so, in /etc/fstab:
> tmpfs /tmp tmpfs defaults,size=256M 0 0
> tmpfs /var/tmp tmpfs defaults,size=64M 0 0
> tmpfs /var/log tmpfs defaults,size=32M 0 0
> firefox /home/bug/.mozilla/firefox/ctso8j3d.default/Cache tmpfs
> defaults,size=32M,uid=500,gid=500,exec 0 0
> 
> 
> Cheers.
> 
> On 10/20/2011 06:27 AM, Casey Bralla wrote:
>> I'm planning on upgrading my desktop system to add an SSD and am looking for 
>> suggestions from this august group to maximize system speed.
>>
>> My current plan is to:
>>
>> - Buy a ~60 GByte drive (seems to be the price/capacity sweet spot)
>> - Partition the SSD for / & /boot
>> - Partition the HDD for /home, /var, /tmp
>> - NFS for my /docs, /music, & other data files
>>
>> Does this sound reasonable?  Anything else that should be forced to either the 
>> SSD or the HDD?
>>
>>
>> BTW, Since the SSD is only 60 GBytes, I expect it to become obsolete long 
>> before it wears out, so I'm not so concerned about limiting the number of 
>> writes to the SSD.  Therefore, I'm planning on continuing to use a journaled 
>> file system on it.
> 

-- 
Gavin W. Burris
Senior Systems Programmer
Information Security and Unix Systems
School of Arts and Sciences
University of Pennsylvania
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