Здравствуйте! Tuesday, March 22, 2016, 4:40:23 PM, you wrote: >> 2) We added option into NBACKUP utility to create change set based on >> baseline GUID rather than level.
VK> Basic tests show it works :) If anyone have idea how to improve it - you are welcome. VK> For example, we could introduce special switch to query backup GUID of target database VK> to pass in into backup automatically. as I understand correctly (maybe not), this is equivalent how InterBase's "online dump" feature works. InterBase cannot produce "level increments", like Firebird, but it can write changes since -b 0 to the -b 0 file. If I'm right, I think using GUIDs in the command line is totally useless. How InterBase do this gbak -d db.ib db.dump if db.dump does not exist, it will be created, and the result will be equivalent of nbackup -b 0 db.fdb db.nb0 except InterBase after dump makes db.dump read-only, and another instance can work with this file without any problem. Next command gbak -d db.ib db.dump will only write changes from db.ib since this command was run last time. After that db.dump have the same state - read-only. If IB needs to overwrite dump, like -b 0 again, -ov switch is used gbak -d -ov ... Since Firebird always overwrite files during nbackup -b 0 I suggest to add nbackup switch that will APPEND changes to nbackup file level 0. Example nbackup -b 0 db.fdb db.nb0 this will always overwrite db.nb0 nbackup -b 0 -ap db.fdb db.nb0 this will append changes, accumulated in db.fdb from the last -b 0. But, in this case nbackup must understand that none "increments" were missing between nbackup -b 0 db.fdb db.nb0 and nbackup -b 0 -ap db.fdb db.nb0 nbackup -b 0 -ap db.fdb db.nb0 ... If I'm not understood what Nikolay have done, consider this message as a feature request. This feature is very good for scalability - to allow split load of one database between two servers. read-only "copy" of the database can be used to run reports, etc. And it can be updated from the main database each 30-10 minutes, if there any need of this. Especially with Firebird 3.0 SCN feature, wich allow nbackup to scan db very fast. -- Dmitry Kuzmenko, www.ibase.ru ------------------------------------------------------------------------------ Transform Data into Opportunity. Accelerate data analysis in your applications with Intel Data Analytics Acceleration Library. Click to learn more. http://pubads.g.doubleclick.net/gampad/clk?id=278785351&iu=/4140 Firebird-Devel mailing list, web interface at https://lists.sourceforge.net/lists/listinfo/firebird-devel
