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Before exiting any files are fsync'ed. A --no-sync option is also
provided for a faster exit if desired.
Michael Paquier.
Reviewed by Albe Laurenz
Discussion: https://postgr.es/m/CAB7nPqS1uZ=Ov+UruW6jr3vB-S_DLVMPc0dQpV-fTDjmm0ZQMg@mail.gmail.com
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"xlog" is not a particularly clear abbreviation for "write-ahead log",
and it sometimes confuses users into believe that the contents of the
"pg_xlog" directory are not critical data, leading to unpleasant
consequences. So, rename the directory to "pg_wal".
This patch modifies pg_upgrade and pg_basebackup to understand both
the old and new directory layouts; the former is necessary given the
purpose of the tool, while the latter merely avoids an unnecessary
backward-compatibility break.
We may wish to consider renaming other programs, switches, and
functions which still use the old "xlog" naming to also refer to
"wal". However, that's still under discussion, so let's do just this
much for now.
Discussion: CAB7nPqTeC-8+zux8_-4ZD46V7YPwooeFxgndfsq5Rg8ibLVm1A@mail.gmail.com
Michael Paquier
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Fixes errors introduced in commit bc34223bc, as detected by Coverity.
In passing, report ENOSPC for a short write while padding a new wal file in
open_walfile, make certain that close_walfile closes walfile in all cases,
and improve a couple of comments.
Michael Paquier and Tom Lane
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This was missed in bf5bb2e85b6492c7245b9446efaf43d52a98db13, because the
code is only visible under PG_FLUSH_DATA_WORKS.
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Several places weren't careful about fsyncing in the way. See 1d4a0ab1
and 606e0f98 for details about required fsyncs.
This adds a couple of functions in src/common/ that have an equivalent
in the backend: durable_rename(), fsync_parent_path()
From: Michael Paquier <michael.paquier@gmail.com>
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The intention is to used those in other utilities such as pg_basebackup
and pg_receivexlog.
From: Michael Paquier <michael.paquier@gmail.com>
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