mysql master slave replication scenario We are creating a new mysql slave, but for dump we are taking from a backup server which is a slave of current master. Now to enable replication we want to connect it with the master so should I take log position from the master or from the backup server where i took the dump from.

Secondly the new server we have created is 5.6 and old server is 5.5, would there be any replication issues as well ?
If you want to setup slave from another slave steps would be as follows


Flush tables with read lock to lock the slave so it should not get updates
show slave status\G and note master co-ordinates
Take backup now using mysqldump
unlock tables to unlock the slave
transfer that backup and restore it to new one
Hope you have issues grant replication slave on master so need to use change master on the new slave and give co-ordinates noted in step-2


For details regarding master-slave version difference, shouldn't be a big issue but a good idea is to go through MySQL documentation.

Hope it helps