Is this an appropriate item?
От | Tatsuo Ishii |
---|---|
Тема | Is this an appropriate item? |
Дата | |
Msg-id | 20120823.113221.827452011753575764.t-ishii@sraoss.co.jp обсуждение исходный текст |
Ответы |
Re: Is this an appropriate item?
|
Список | pgsql-hackers |
Hi, I found following item in the Developer FAQ. I don't see why this is related to developers. ------------------------------------------------------------------------------------Why aren't there more compression optionswhen dumping tables? pg_dump's built-in compression method is gzip. The primary alternative, bzip2, is normally far too slow to be useful whendumping large tables. The two main alternatives regularly proposed for better built-in compression at good speeds are LZO and LZMA/LZMA2/XZ. LZOis released under the GPL, incompatible with PostgreSQL. The LZMA2 code has been released into the public domain, butthe C port is a secondary one (C++ is the main development focus) whose code quality hasn't seemed appropriate for thisproject. And this whole area has traditionally been filled with patent issues that go beyond just the restrictions ofthe software license. Another limitation on changing this is that pg_dump output is intended to be archivable, so we had better be prepared tosupport compression methods for a very long time. The "latest and greatest" compression method is exactly what we *don't*want. See the archives for an idea what characteristics an alternate compression tool would need to have in order to be consideredfor use in core PostgreSQL. ------------------------------------------------------------------------------------ -- Tatsuo Ishii SRA OSS, Inc. Japan English: http://www.sraoss.co.jp/index_en.php Japanese: http://www.sraoss.co.jp
В списке pgsql-hackers по дате отправления: