From mboxrd@z Thu Jan 1 00:00:00 1970 MIME-Version: 1.0 Date: Mon, 29 Jun 2009 09:13:09 +0800 Message-ID: <1d5d51400906281813g649a72f7v8610b0311c7de5f@mail.gmail.com> From: Fernan Bolando To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: [9fans] when to use vac -q -d old.vac instead of simply vac -d old.vac Topicbox-Message-UUID: 10757bda-ead5-11e9-9d60-3106f5b1d025 Hi The p9p vac discussion made me re-think the way I use vac. man vac "-q Increase the performance of the -a or -d options by detecting unchanged files based on a match of the files name and other meta data, rather than examining the contents of the files" Why is -q not a default? Is there a reliability concern with that option? I am currently doing an hourly backup using vac -d old_date-time.vac -f new_date-time.vac /home which gives me a collection files with a date-time.vac filename. I am thinking I should just use vac -a main.vac /home to switch to this method I only need to rename latest date-time.vac to main.vac and delete the other ones, right? fernan -- http://www.fernski.com