IXFR and AXFR
At what time the slave executes AXFR and at what time it executes IXFR from the master? Thanks. ___ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: IXFR and AXFR
> At what time the slave executes AXFR and at what time it executes IXFR > from the master? Someone please correct me if I give misleading information. I don't believe I am, but I've been wrong before :D There's a good section about this in the ARM, such as BIND 9.7 ARM section 4.3 - Incremental Zone Transfers (IXFR). Basically, a BIND 9 slave will normally ask for IXFR unless told not to (request-ixfr). A BIND 9 master can't always provide IXFR though - if it can't it will provide AXFR instead. To be able to provide IXFR it needs to have some idea of the changes being made, so it can give a meaningful reply when asked to provide "all changes since serial number X", so you'll normally see IXFR being possible for dynamically updated zones (and a couple of other cases, check the ARM). Regards Eivind Olsen ___ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: IXFR and AXFR
In message , "Eivind Ols en" writes: > > At what time the slave executes AXFR and at what time it executes IXFR > > from the master? > > Someone please correct me if I give misleading information. I don't > believe I am, but I've been wrong before :D > > There's a good section about this in the ARM, such as BIND 9.7 ARM section > 4.3 - Incremental Zone Transfers (IXFR). > > Basically, a BIND 9 slave will normally ask for IXFR unless told not to > (request-ixfr). > A BIND 9 master can't always provide IXFR though - if it can't it will > provide AXFR instead. To be able to provide IXFR it needs to have some > idea of the changes being made, so it can give a meaningful reply when > asked to provide "all changes since serial number X", so you'll normally > see IXFR being possible for dynamically updated zones (and a couple of > other cases, check the ARM). > > Regards > Eivind Olsen named will do a axfr initially, anytime it believes it has lost sync with the master (the ixfr did not apply without error), when "rndc retransfer" is called, when ixfr is rejected by the master. The master will return a AXFR style IXFR whenever it doesn't have the requested axfr stream. > ___ > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org ___ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: IXFR and AXFR
Mark Andrews writes: The master will return a AXFR style IXFR whenever it doesn't have the requested axfr stream. Do you mean whenever it doesn't have the requested IXFR stream? Thanks. ___ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: IXFR and AXFR
In message <20110127124124.5b8ed2d...@mail.nsbeta.info>, p...@mail.nsbeta.info writes: > Mark Andrews writes: > > > The master will return a AXFR style IXFR whenever it doesn't have the > > requested a > xfr stream. > > Do you mean whenever it doesn't have the requested IXFR stream? When you make a IXFR request you say "please send me the changes starting at this serial". Sometimes the master will have already discarded some or all of the changes. IXFR allows for optional compression of deltas and if one of the masters in the axfr graph does that and you have multiple masters listed you make end up ask a master that about a serial that was compressed away. > Thanks. -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org ___ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
