Yes, but if you have many counters in a row: 1. If you specify a timestamp, they will have the same timestamp, but different revisions 2. If you dont specify the timestamp, they will have same timestamp+revision, but different compared to each other
While i was talking about having the same timestamp/revision across all the cells (so the timestamps/revisions from different cells will be compressed together on that cell-block). On Mon, Jun 16, 2014 at 11:20 PM, Doug Judd <[email protected]> wrote: > The revision number is a field that is necessary for Hypertable to work > properly. We use it for MVCC > <http://en.wikipedia.org/wiki/Multiversion_concurrency_control> purposes. > However, if you don't supply a timestamp (e.g. auto-assign), then the > timestamp and the revision number are the same and they occupy the same > space. This goes for COUNTER columns as well as normal ones. > > - Doug > > > On Mon, Jun 16, 2014 at 4:24 AM, dorian i <[email protected]> wrote: > >> It's possible for the revision number to be supplied with inserts and >>> queries. >>> >> Is there a roadmap(possible?) for specifying revision when inserting? >> >> Mainly to lower overhead on: >> >> 1. counter columns (what could go wrong on increments with the same >> revision/timestamp?). While deletes can use future timestamps. >> 2. normal columns where timestamp=revision >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Hypertable Development" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> >> To post to this group, send email to [email protected]. >> Visit this group at http://groups.google.com/group/hypertable-dev. >> For more options, visit https://groups.google.com/d/optout. >> > > > > -- > Doug Judd > CEO, Hypertable Inc. > > -- > You received this message because you are subscribed to a topic in the > Google Groups "Hypertable Development" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/hypertable-dev/KKOLLyCFNzs/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/hypertable-dev. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Hypertable Development" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/hypertable-dev. For more options, visit https://groups.google.com/d/optout.
