3 Replies Latest reply: Apr 14, 2013 1:16 AM by 1002686 RSS

    LNS

    1002686
      Hello experts,

      We have two Primary and Physical Standby Oracle Databases. One standby version is 10.2.0.4 & another one is 11.2.0.2

      1) I would like to know whether the write to local online redo logs (by LGWR) and the remote write through the network layer (by NSS) happen in parallel?

      2) Is it the LNS process that transmits redo data to a standby DB?

      3) ARCH is deprecated in 11g. Does it mean that ARCH will not ship archive in order to resolve archive log gaps?

      Any help will be highly appreciated.

      Thanks & Regards
        • 1. Re: LNS
          saratpvv
          2) Is it the LNS process that transmits redo data to a standby DB?
          Yes..LNS sends redo information from the primary to standby databases. The mode of information passed on depends on the type of apply that you are using in the parameter "log_archive_dest_n" where n stands for the destination number that is pointing to the standby database service on the primary database initialization parameter file. If you are using Real Time apply, then you would be using the term LGWR in the above mentioned parameter and remember that you require Standby Redo Logs created for the real time to be used.
          3) ARCH is deprecated in 11g. Does it mean that ARCH will not ship archive in order to resolve archive log gaps?
          Yes ARCH is deprecated in 11g,but doesn't mean that ARCH will not ship Archive Logs in order to resolve Archive Log Gaps, though.
          • 2. Re: LNS
            Lonion
            1) I would like to know whether the write to local online redo logs (by LGWR) and the remote write through the network layer (by NSS) happen in parallel?
            No.
            it is depend on its transport mode . SYNC or ASYNC ?
            • 3. Re: LNS
              1002686
              Hello

              IN case of SYNC mode, the write to local online redo logs (by LGWR) and the remote write through the network layer (by NSS) happen in parallel?

              Thanks