i'm asking this because i do have a machine that is 4minutes ahead of others.. and thus a few things relying on (sorted-by) local clock() timestamp went plop. And everyone-with-own-idea-of-time is going to be the norm..
so now i'm looking for some kind of autoincrementing suffix, additional to server-side clock being stamped on documents.. coz incoming order does matter (multiple in same microsecond). Looked at _local_seq for that (by copy into another field to unlocal it), but not sure if it is always increasing (or sufficienty "always"). probably is. anyway, thanks svil On Thu, 8 Nov 2012 10:36:13 -0800 Mark Hahn <[email protected]> wrote: > I use utc_random. It is really useful. Easy to sort by creation > date. And you can even extract the creation date from the _id and > save a field. > > On Thu, Nov 8, 2012 at 10:21 AM, Robert Newson <[email protected]> > wrote: > > > Hi, > > > > Here's the pertinent information on the various UUID algorithms > > CouchDB supports; > > > > [uuids] > > ; Known algorithms: > > ; random - 128 bits of random awesome > > ; All awesome, all the time. > > ; sequential - monotonically increasing ids with random increments > > ; First 26 hex characters are random. Last 6 increment in > > ; random amounts until an overflow occurs. On overflow, the > > ; random prefix is regenerated and the process starts over. > > ; utc_random - Time since Jan 1, 1970 UTC with microseconds > > ; First 14 characters are the time in hex. Last 18 are random. > > ; utc_id - Time since Jan 1, 1970 UTC with microseconds, plus > > utc_id_suffix string > > ; First 14 characters are the time in hex. uuids/utc_id_suffix > > string value is appended to these. > > > > The default is "sequential". > > > > B. > > > > > > On 8 November 2012 18:13, Mark Hahn <[email protected]> wrote: > > > > > http://en.wikipedia.org/wiki/Universally_unique_identifier > > > > > > On Thu, Nov 8, 2012 at 2:31 AM, Andrey Kuprianov < > > > [email protected]> wrote: > > > > > > > It's a uuid. It's unique wherever > > > > > > > > > > > > On Thu, Nov 8, 2012 at 6:32 PM, svilen <[email protected]> > > > > wrote: > > > > > > > > > hi > > > > > are auto-generated uuids (when doc is saved without assigned > > > > > id) unique across server-instance, or only within the > > > > > database? > > > > > > > > > > i.e. can i take a doc from one database and write > > > > > it as-is-without-the-_rev into another database? > > > > > can that become a problem? > > > > > > > > > > ciao > > > > > svil > > > > > > > > > > www.notionery.com > > > > > www.svilendobrev.com > > > > > > > > > > > > > >
