On 3/22/17 17:33, David Steele wrote: > and I doubt that most tool writers would be quick to > add support for a feature that very few people (if any) use.
I'm not one of those tool writers, although I have written my share of DBA scripts over the years, but I wonder why those tools would really care. They are handed files with predetermined names to archive, and for restore files with predetermined names are requested back from them. What else do they need? If something is missing that requires them to parse file names, then maybe that should be added.
I have a pg_restore which predicts the file 5 files ahead of the one it was asked for, and initiates a pre-fetch and decompression of it. Then it delivers the file it was asked for, either by pulling it out of the pre-staging area set up by the N-5th invocation, or by going directly to the archive to get it. This speeds up play-back dramatically when the files are stored compressed and non-local.
That is why I need to know how the files are numbered. I don't think that that makes much of a difference, though. Any change is going to break that, no matter which change. Then I'll fix it.
If we are going to break it, I'd prefer to just do away with the 'segment' thing altogether. You have timelines, and you have files. That's it.
