[hashcash] Re: Database purge query

Note even if the -e is after the -p, it should work though in a
different way.

At the time the stamp is checked the expiry information will be
written to the hashcash.sdb file.  (The 1209600 seconds = 14d).

Then every 7 days the purge will happen, and because the -e doesnt
apply to the -p if it comes after it, there will be no explicit expiry
argument given to the purge.  In this scenario the purge takes the
expiry information from hashcash.sdb.

I tested this also and it worked for me, however I didnt have the -p
7d, I had -p now so I didnt have to wait.  I think if the previous
purge happens just before you accept a stamp, and including grace
period, a stamp could legitimately live in the db for up to: 7+14+2 =
23 days, right?

Could that explain what you saw?

Adam

On Mon, Aug 21, 2006 at 09:31:18PM -0000, BiKiKii wrote:


> On Mon, 21 Aug 2006, Dr Adam Back wrote:
> 
> Hello,
> 
> Thank you. This is the information needed:
> 
> >Note also for the -e to apply to the purge, that option must come
> >before the -p option.  (Otherwise it applies to the -c etc).
> >
> 
> Rewriting the command with the -expirey before the -purge
> (and changing purge to 1 day for testing)...
> 
> hashcash -cd -X -i -q -e 14d -p 1d -b 27 -r bikikii -f hashcash.sdb < "%x%"
> 
> has the desired result:
> 
> last_purged 060821203814
> 1:27:060806:bikikii::iYNtHsxuIOl3C9B1:0000000005Gj1R 1209600
> 1:27:060806:bikikii::Ezp/CKbBgXs1YJLM:000000000A4PRp 1209600
> 1:27:060807:bikikii::doOjfbu8jzc4eCLq:0000000005TxYf 1209600
> 
> Now back to 7 days for -purge and see what happens next week.
> 
> Ciao!
> 
> BiKiKii
> 
> ----- Original Message ---------------
> >Seems to work for me.  Bear in mind that there is a default grace
> >period of 2days, so stamps will not actually exire until 16 days after
> >issue if you say -e 14d.  You can override that with -g 0 if you dont
> >want any grace period.
> >
> >Note also for the -e to apply to the purge, that option must come
> >before the -p option.  (Otherwise it applies to the -c etc).
> >
> >Using your stamp file if I do this:
> >
> >hashcash -g 0 -p now -t 060731
> >
> >then the stamp file afterwards holds:
> >
> >last_purged 060730230000
> >1:27:060717:bikikii::ATSrpfAr7W1prZUO:00000000055kh+ 1209600
> >
> >(if no -e is given the e value given at time of checking (-c) is
> >stored in the db and used.  ie the 1209600 == 14days.)
> >
> >On Fri, Aug 18, 2006 at 08:25:10PM -0500, BiKiKii wrote:
> >> [hashcash-1.22 W32 console]
> >> 
> >> Is there something wrong with the below commandline?
> >> The commandline is abbreviated but all the options are listed.
> >> The option of "-f" is used as the database is located at a different
> >> drive:\directory location than the executable. 
> >> 
> >> Too many or incompatible options?
> >> 
> >> I expect it to purge the database of expired stamps.
> >> Stamps that are older than 14 days. But it only purges
> >> those stamps older than 28 days.
> >> 
> >> 
> >> hashcash -cd -X -i -q -p 7d -e 14d -b 27 -r bikikii -f hashcash.sdb < "%x%"
> >> 
> >> last_purged 060812095308
> >> 1:27:060716:bikikii::LSQ1tRGm+Opf6Ish:0000000007QTsq 1209600
> >> 1:27:060717:bikikii::ATSrpfAr7W1prZUO:00000000055kh+ 1209600
> >> 1:27:060716:bikikii::/KM9u7rGJMXBr0wW:0X63s 1209600

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