swapcache Setup

Dylan Reinhold dylan at ocnetworking.com
Mon May 24 18:57:26 PDT 2010

On 05/24/2010 01:42 PM, Matthew Dillon wrote:
:Hello All,
:   I added a How-To for setting up swapcache from my notes.
     That looks pretty good.  The swapcache manual page has some extensive
     recommendations (but not the step-by-step that you put together for
     docs), the most important of which being that you might want to
     configure only 32G of swap on the 40G SSD instead of using all 40G.
     For a manufacturer-fresh SSD configuring only 32G out of the 40G
     leaves 8G which the SSD firmware will use to enhance its wear-leveling
     algorithms, improving the overall life of the SSD.
     Here are some suggestions:

     * When using a 40G SSD as an example configure only 32G of swap.

     * There is no need to newfs a swap partition.

     * Someone configuring swapcache fresh with no prior experience should
       start by only caching meta-data.  i.e. data_enable=0.
					Matthew Dillon
					<dillon at backplane.com>
  Thanks for the info, I will update the page to include your suggestions.

More information about the Users mailing list