From: Thompson, B. B. <BRY...@sa...> - 2006-02-16 18:28:32
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I agree with those sense for optimisim/pessimism. -----Original Message----- From: jdb...@li... on behalf of Alex Boisvert Sent: Thu 2/16/2006 11:32 AM To: Kevin Day Cc: JDBM Developer listserv Subject: Re: [Jdbm-developer] MC-DataSafe (in Persistent Store Inte rface). Kevin Day wrote: > I don't think that MVCC says one way or the other, actually. It > avoids contention entirely for reads, so talking about optimistic or > pessimistic in that context just doesn't apply. My understanding is that optimistic means you allow processing to happen even thought there's a chance that you might have to rollback later; you hope that you won't have to. Pessimistic means that you assume the worst and take extra measures to increase the chances that you'll be able to commit. In that context, MVCC is more optimistic than pessimistic. alex ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=103432&bid=230486&dat=121642 _______________________________________________ Jdbm-developer mailing list Jdb...@li... https://lists.sourceforge.net/lists/listinfo/jdbm-developer |