[HACKERS] HA features for PostgreSQL in 7.5/8.0
Hello hackers Is there a plan to mirror logfiles or/and controlfiles for the new version of PostgreSQL? Or do you think it is not that important for HA? Regards Oli --- Oli Sennhauser Database-Engineer (Oracle PostgreSQL) Rebenweg 6 CH - 8610 Uster / Switzerland Phone (+41) 1 940 24 82 or Mobile (+41) 79 450 49 14 e-Mail [EMAIL PROTECTED] Website http://mypage.bluewin.ch/shinguz/PostgreSQL/ Secure (signed/encrypted) e-Mail with a Free Personal SwissSign ID: http://www.swisssign.ch Import the SwissSign Root Certificate: http://swisssign.net/cgi-bin/trust/import smime.p7s Description: S/MIME Cryptographic Signature
Re: [HACKERS] pg_restore and create FK without verification check
People might be more interested in debating this topic with you if we hadn't discussed it at length just a couple months back. There wasn't consensus then that we had to offer an escape hatch, and you've not offered any argument that wasn't made before. I'm simply presenting a problem for which I currently do not see any solution (it's very important for us to be able to restore db within a reasonable amount of time). If there's no solution and none is planned, then we cannot use pgsql, can we? You're simply presenting a problem that isn't there in the first place. If you really feel the need to shoot yourself in the foot, use separate schema and data dumps and do the latter with -X disable-triggers. And now will you please put it to rest? If this is not a prio 1 problem, what are then the prio one problems??? You are a developer, right? Did you ever manage a big database in production? What shoul I tell to my customers when they want to have a not that big database (100 GB) in PostgreSQL: I am sorry, but we are not able to do performant backups, I recommend you to choos ORACLE instead???. Is it this we/you recommend? Regards Oli --- Oli Sennhauser Database-Engineer (Oracle PostgreSQL) Rebenweg 6 CH - 8610 Uster / Switzerland Phone (+41) 1 940 24 82 or Mobile (+41) 79 450 49 14 e-Mail [EMAIL PROTECTED] Website http://mypage.bluewin.ch/shinguz/PostgreSQL/ Secure (signed/encrypted) e-Mail with a Free Personal SwissSign ID: http://www.swisssign.ch Import the SwissSign Root Certificate: http://swisssign.net/cgi-bin/trust/import smime.p7s Description: S/MIME Cryptographic Signature
Re: [HACKERS] pg_restore and create FK without verification check
Hello I was asking about this too, one or two weeks ago. It appears there's not a lot of interest in discussing the possibility of FK constraint creation WITHOUT the verification check. How then should one handle the situation with pg_restore and large dbs where creation of FK constraint(s) may take hours? I'd prefer a backup/restore method that dumps physical data, so at restore time there's no need for recreation of FKs. But I didn't see any feedback on this proposal either. Was this proposal a separate one from using WAL logs for PITR ? My question then was: Q2: New situation: Why is it not a good idea to backup the database files of a cluster incl. all c_log and x_log (log files last) to get a physicaly hot backup. In principle it is the same situation like a server which is crashing (not a once but during some time). After restoring, it should do a redo and rollback automatically like after a crash. This methode (physical hot backup) would increas backup and restore times dramatically. The answer from Robert Treat was: Essentially I think you're right, it should behave much like a crashing server. The main reason why people don't recommend it is that (depending on your os setup) there is the potential to lose data that has been commited but not actually written to disk. Note that you shouldn't get corrupted data from this, but in many cases losing data is just as bad so we don't recomend it. If you really want to do this, you should really either shut down the database or get LVM going. I did not yet many tests. But in principle I was able to hot-backup a cluster or only one database and restore it. But the answer from Robert makes me a little afraid. It means for me he/they do not trust theire recovery mechanism. A definitive answer from Robert is still out. In my opinion a high grade professional database system (like PostgreSQL is or want to be) should have some hot backup features. Otherwise you are NEVER able to handle VLDB's. They were discussing about a 32 TB PostgreSQL database. And I bet my next bonus this year :-), that they are also not able to backup and restore it in a reasonable time. Regards Oli --- Oli Sennhauser Database-Engineer (Oracle PostgreSQL) Rebenweg 6 CH - 8610 Uster / Switzerland Phone (+41) 1 940 24 82 or Mobile (+41) 79 450 49 14 e-Mail [EMAIL PROTECTED] Website http://mypage.bluewin.ch/shinguz/PostgreSQL/ Secure (signed/encrypted) e-Mail with a Free Personal SwissSign ID: http://www.swisssign.ch Import the SwissSign Root Certificate: http://swisssign.net/cgi-bin/trust/import smime.p7s Description: S/MIME Cryptographic Signature
Re: [HACKERS] Release cycle length
Hello hackers Sorry when I am talking to the gurus... There is a database, which has a concept called Transportable Tablespace (TTS). Would it not be a verry easy and fast solution to just do this with the Tables, Index and all non catalog related files. - You create a new db cluster (e.g 8.0). - Generate a TTS export skript. - Shut the (old) db-cluster (files should be consistent now, ev. do something with the log files before). - Move the files (eventually not needed) and - plug it in to the new db cluster (via the export skript). Expected downtime (without moving data files) 5-10 minutes. Regards Oli --- Oli Sennhauser Database-Engineer (Oracle PostgreSQL) Rebenweg 6 CH - 8610 Uster / Switzerland Phone (+41) 1 940 24 82 or Mobile (+41) 79 450 49 14 e-Mail [EMAIL PROTECTED] Website http://mypage.bluewin.ch/shinguz/PostgreSQL/ Secure (signed/encrypted) e-Mail with a Free Personal SwissSign ID: http://www.swisssign.ch Import the SwissSign Root Certificate: http://swisssign.net/cgi-bin/trust/import smime.p7s Description: S/MIME Cryptographic Signature
