Hi! > ...if it has v4 slaves
I know how v4 slave will break. It will break entirely. Binlogs are not compatible. > Perhaps someone that wants to be able to switch the master back to a mysql4. Such steps are one direction, usually :) And why would anyone, except me, want to run on mysql4? :-) By the way, we're having huge stalls now, buffer pool dirty page flushing sometimes starves when is not able to find any dirty pages to flush. > Was that a wild idea that if there's no 'upgraded to mysql 5.1' entry in > the log, the old mysql4 master was kept as a slave? Well, it is useless pretty soon, as applying binlogs is pain, and it gets old very very very fast. > mysql replicates the sql statements, so I wouldn't be surprised if a > mysql5 which only received mysql4 compatible statements worked as master > for mysql4s. Yes, it is possible, if there's binlog conversion going on, or external replication agent is used (such as trainwreck). Domas _______________________________________________ Wikitech-l mailing list [email protected] https://lists.wikimedia.org/mailman/listinfo/wikitech-l
